Z_STEPPER_AUTO_ALIGN — To align with Z stepper points (#15195)

Marlin/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

Marlin/src/gcode/calibrate/G34_M422.cpp

@@ -25,28 +25,33 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
 
 #include "../gcode.h"
-#include "../../module/delta.h"
+#include "../../module/planner.h"
-#include "../../module/motion.h"
 #include "../../module/stepper.h"
-#include "../../module/endstops.h"
+#include "../../module/motion.h"
+#include "../../module/probe.h"
 
 #if HOTENDS > 1
   #include "../../module/tool_change.h"
 #endif
 
-#if HAS_BED_PROBE
-  #include "../../module/probe.h"
-#endif
-
 #if HAS_LEVELING
   #include "../../feature/bedlevel/bedlevel.h"
 #endif
 
+#if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+   #include "../../libs/least_squares_fit.h"
+#endif
+
 #define DEBUG_OUT ENABLED(DEBUG_LEVELING_FEATURE)
 #include "../../core/debug_out.h"
 
-// Sanity-check
+// Sanity-check the count of Z_STEPPER_ALIGN_XY points
 constexpr xy_pos_t sanity_arr_z_align[] = Z_STEPPER_ALIGN_XY;
+#if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+  static_assert(COUNT(sanity_arr_z_align) >= Z_STEPPER_COUNT,
+    "Z_STEPPER_ALIGN_XY requires at least three {X,Y} entries (Z, Z2, Z3, ...)."
+  );
+#else
   static_assert(COUNT(sanity_arr_z_align) == Z_STEPPER_COUNT,
     #if ENABLED(Z_TRIPLE_STEPPER_DRIVERS)
       "Z_STEPPER_ALIGN_XY requires three {X,Y} entries (Z, Z2, and Z3)."
@@ -54,8 +59,15 @@ static_assert(COUNT(sanity_arr_z_align) == Z_STEPPER_COUNT,
       "Z_STEPPER_ALIGN_XY requires two {X,Y} entries (Z and Z2)."
     #endif
   );
+#endif
 
-xy_pos_t z_auto_align_pos[Z_STEPPER_COUNT] = Z_STEPPER_ALIGN_XY;
+static xy_pos_t z_auto_align_pos[Z_STEPPER_COUNT] = Z_STEPPER_ALIGN_XY;
+
+#if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+  static xy_pos_t z_stepper_pos[] = Z_STEPPER_ALIGN_STEPPER_XY;
+#endif
+
+#define G34_PROBE_COUNT COUNT(z_auto_align_pos)
 
 inline void set_all_z_lock(const bool lock) {
   stepper.set_z_lock(lock);
@@ -68,7 +80,9 @@ inline void set_all_z_lock(const bool lock) {
 /**
  * G34: Z-Stepper automatic alignment
  *
- * Parameters: I<iterations> T<accuracy> A<amplification>
+ *   I<iterations>
+ *   T<accuracy>
+ *   A<amplification>
  */
 void GcodeSuite::G34() {
   if (DEBUGGING(LEVELING)) {
@@ -90,11 +104,18 @@ void GcodeSuite::G34() {
       break;
     }
 
-    const float z_auto_align_amplification = parser.floatval('A', Z_STEPPER_ALIGN_AMP);
+    const float z_auto_align_amplification =
+      #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+        Z_STEPPER_ALIGN_AMP;
+      #else
+        parser.floatval('A', Z_STEPPER_ALIGN_AMP);
         if (!WITHIN(ABS(z_auto_align_amplification), 0.5f, 2.0f)) {
           SERIAL_ECHOLNPGM("?(A)mplification out of bounds (0.5-2.0).");
           break;
         }
+      #endif
+
+    const ProbePtRaise raise_after = parser.boolval('E') ? PROBE_PT_STOW : PROBE_PT_RAISE;
 
     // Wait for planner moves to finish!
     planner.synchronize();
@@ -130,6 +151,8 @@ void GcodeSuite::G34() {
       #define Z_BASIC_CLEARANCE Z_CLEARANCE_BETWEEN_PROBES
     #endif
 
+    // Compute a worst-case clearance height to probe from. After the first
+    // iteration this will be re-calculated based on the actual bed position
     float z_probe = Z_BASIC_CLEARANCE + (G34_MAX_GRADE) * 0.01f * (
       #if ENABLED(Z_TRIPLE_STEPPER_DRIVERS)
          SQRT(_MAX(HYPOT2(z_auto_align_pos[0].x - z_auto_align_pos[0].y, z_auto_align_pos[1].x - z_auto_align_pos[1].y),
@@ -147,12 +170,10 @@ void GcodeSuite::G34() {
     current_position.z -= z_probe * 0.5f;
 
     float last_z_align_move[Z_STEPPER_COUNT] = ARRAY_N(Z_STEPPER_COUNT, 10000.0f, 10000.0f, 10000.0f),
-          z_measured[Z_STEPPER_COUNT] = { 0 },
+          z_measured[G34_PROBE_COUNT] = { 0 },
           z_maxdiff = 0.0f,
           amplification = z_auto_align_amplification;
 
-    const ProbePtRaise raise_after = parser.boolval('E') ? PROBE_PT_STOW : PROBE_PT_RAISE;
-
     uint8_t iteration;
     bool err_break = false;
     for (iteration = 0; iteration < z_auto_align_iterations; ++iteration) {
@@ -161,17 +182,19 @@ void GcodeSuite::G34() {
       SERIAL_ECHOLNPAIR("\nITERATION: ", int(iteration + 1));
 
       // Initialize minimum value
-      float z_measured_min = 100000.0f;
+      float z_measured_min = 100000.0f,
+            z_measured_max = -100000.0f;
+
       // Probe all positions (one per Z-Stepper)
-      for (uint8_t izstepper = 0; izstepper < Z_STEPPER_COUNT; ++izstepper) {
+      for (uint8_t i = 0; i < G34_PROBE_COUNT; ++i) {
         // iteration odd/even --> downward / upward stepper sequence
-        const uint8_t zstepper = (iteration & 1) ? Z_STEPPER_COUNT - 1 - izstepper : izstepper;
+        const uint8_t iprobe = (iteration & 1) ? G34_PROBE_COUNT - 1 - i : i;
 
         // Safe clearance even on an incline
-        if (iteration == 0 || izstepper > 0) do_blocking_move_to_z(z_probe);
+        if (iteration == 0 || i > 0) do_blocking_move_to_z(z_probe);
 
         // Probe a Z height for each stepper.
-        const float z_probed_height = probe_at_point(z_auto_align_pos[zstepper], raise_after, 0, true);
+        const float z_probed_height = probe_at_point(z_auto_align_pos[i], raise_after, 0, true);
         if (isnan(z_probed_height)) {
           SERIAL_ECHOLNPGM("Probing failed.");
           err_break = true;
@@ -180,35 +203,58 @@ void GcodeSuite::G34() {
 
         // Add height to each value, to provide a more useful target height for
         // the next iteration of probing. This allows adjustments to be made away from the bed.
-        z_measured[zstepper] = z_probed_height + Z_CLEARANCE_BETWEEN_PROBES;
+        z_measured[iprobe] = z_probed_height + Z_CLEARANCE_BETWEEN_PROBES;
 
-        if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", int(zstepper + 1), " measured position is ", z_measured[zstepper]);
+        if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("> Z", int(iprobe + 1), " measured position is ", z_measured[iprobe]);
 
         // Remember the minimum measurement to calculate the correction later on
-        z_measured_min = _MIN(z_measured_min, z_measured[zstepper]);
+        z_measured_min = _MIN(z_measured_min, z_measured[iprobe]);
-      } // for (zstepper)
+        z_measured_max = _MAX(z_measured_max, z_measured[iprobe]);
+      } // for (i)
 
       if (err_break) break;
 
       // Adapt the next probe clearance height based on the new measurements.
       // Safe_height = lowest distance to bed (= highest measurement) plus highest measured misalignment.
-      #if ENABLED(Z_TRIPLE_STEPPER_DRIVERS)
+      z_maxdiff = z_measured_max - z_measured_min;
-        z_maxdiff = _MAX(ABS(z_measured[0] - z_measured[1]), ABS(z_measured[1] - z_measured[2]), ABS(z_measured[2] - z_measured[0]));
+      z_probe = Z_BASIC_CLEARANCE + z_measured_max + z_maxdiff;
-        z_probe = Z_BASIC_CLEARANCE + _MAX(z_measured[0], z_measured[1], z_measured[2]) + z_maxdiff;
+
-      #else
+      #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
-        z_maxdiff = ABS(z_measured[0] - z_measured[1]);
+        // Replace the initial values in z_measured with calculated heights at
-        z_probe = Z_BASIC_CLEARANCE + _MAX(z_measured[0], z_measured[1]) + z_maxdiff;
+        // each stepper position. This allows the adjustment algorithm to be
+        // shared between both possible probing mechanisms.
+
+        // This must be done after the next z_probe height is calculated, so that
+        // the height is calculated from actual print area positions, and not
+        // extrapolated motor movements.
+
+        // Compute the least-squares fit for all probed points.
+        // Calculate the Z position of each stepper and store it in z_measured.
+        // This allows the actual adjustment logic to be shared by both algorithms.
+        linear_fit_data lfd;
+        incremental_LSF_reset(&lfd);
+        for (uint8_t i = 0; i < G34_PROBE_COUNT; ++i) {
+          SERIAL_ECHOLNPAIR("PROBEPT_", int(i + 1), ": ", z_measured[i]);
+          incremental_LSF(&lfd, z_auto_align_pos[i], z_measured[i]);
+        }
+        finish_incremental_LSF(&lfd);
+
+        z_measured_min = 100000.0f;
+        for (uint8_t i = 0; i < Z_STEPPER_COUNT; ++i) {
+          z_measured[i] = -(lfd.A * z_stepper_pos[i].x + lfd.B * z_stepper_pos[i].y);
+          z_measured_min = _MIN(z_measured_min, z_measured[i]);
+        }
+
+        SERIAL_ECHOLNPAIR("CALCULATED STEPPER POSITIONS: Z1=", z_measured[0], " Z2=", z_measured[1], " Z3=", z_measured[2]);
       #endif
 
-      SERIAL_ECHOPAIR("\n"
+      SERIAL_ECHOLNPAIR("\n"
         "DIFFERENCE Z1-Z2=", ABS(z_measured[0] - z_measured[1])
         #if ENABLED(Z_TRIPLE_STEPPER_DRIVERS)
           , " Z2-Z3=", ABS(z_measured[1] - z_measured[2])
           , " Z3-Z1=", ABS(z_measured[2] - z_measured[0])
         #endif
       );
-      SERIAL_EOL();
-      SERIAL_EOL();
 
       // The following correction actions are to be enabled for select Z-steppers only
       stepper.set_separate_multi_axis(true);
@@ -220,8 +266,10 @@ void GcodeSuite::G34() {
         const float z_align_move = z_measured[zstepper] - z_measured_min,
                     z_align_abs = ABS(z_align_move);
 
-        // Optimize one iterations correction based on the first measurements
+        #if DISABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+          // Optimize one iteration's correction based on the first measurements
           if (z_align_abs > 0.0f) amplification = iteration == 1 ? _MIN(last_z_align_move[zstepper] / z_align_abs, 2.0f) : z_auto_align_amplification;
+        #endif
 
         // Check for less accuracy compared to last move
         if (last_z_align_move[zstepper] < z_align_abs - 1.0) {
@@ -266,7 +314,6 @@ void GcodeSuite::G34() {
 
     SERIAL_ECHOLNPAIR("Did ", int(iteration + (iteration != z_auto_align_iterations)), " iterations of ", int(z_auto_align_iterations));
     SERIAL_ECHOLNPAIR_F("Accuracy: ", z_maxdiff);
-    SERIAL_EOL();
 
     // Restore the active tool after homing
     #if HOTENDS > 1
@@ -299,31 +346,82 @@ void GcodeSuite::G34() {
 }
 
 /**
- * M422: Z-Stepper automatic alignment parameter selection
+ * M422: Set a Z-Stepper automatic alignment XY point.
+ *       Use repeatedly to set multiple points.
+ *
+ *   S<index> : Index of the probe point to set
+ *
+ * With Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS:
+ *   W<index> : Index of the Z stepper position to set
+ *              The W and S parameters may not be combined.
+ *
+ * S and W require an X and/or Y parameter
+ *   X<pos>   : X position to set (Unchanged if omitted)
+ *   Y<pos>   : Y position to set (Unchanged if omitted)
  */
 void GcodeSuite::M422() {
-  const int8_t zstepper = parser.intval('S') - 1;
+  if (!parser.seen_any()) {
-  if (!WITHIN(zstepper, 0, Z_STEPPER_COUNT - 1)) {
+    for (uint8_t i = 0; i < G34_PROBE_COUNT; ++i)
-    SERIAL_ECHOLNPGM("?(S) Z-Stepper index invalid.");
+      SERIAL_ECHOLNPAIR("M422 S", i + 1, " X", z_auto_align_pos[i].x, " Y", z_auto_align_pos[i].y);
+    #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+      for (uint8_t i = 0; i < Z_STEPPER_COUNT; ++i)
+        SERIAL_ECHOLNPAIR("M422 W", i + 1, " X", z_stepper_pos[i].x, " Y", z_stepper_pos[i].y);
+    #endif
     return;
   }
 
+  const bool is_probe_point = parser.seen('S');
+
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    if (is_probe_point && parser.seen('W')) {
+      SERIAL_ECHOLNPGM("?(S) and (W) may not be combined.");
+      return;
+    }
+  #endif
+
+  xy_pos_t *pos_dest = (
+    #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+      !is_probe_point ? z_stepper_pos :
+    #endif
+    z_auto_align_pos
+  );
+
+  // Get the Probe Position Index or Z Stepper Index
+  int8_t position_index;
+  if (is_probe_point) {
+    position_index = parser.intval('S') - 1;
+    if (!WITHIN(position_index, 0, int8_t(G34_PROBE_COUNT) - 1)) {
+      SERIAL_ECHOLNPGM("?(S) Z-ProbePosition index invalid.");
+      return;
+    }
+  }
+  else {
+    #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+      position_index = parser.intval('W') - 1;
+      if (!WITHIN(position_index, 0, Z_STEPPER_COUNT - 1)) {
+        SERIAL_ECHOLNPGM("?(W) Z-Stepper index invalid.");
+        return;
+      }
+    #endif
+  }
+
   const xy_pos_t pos = {
-    parser.floatval('X', z_auto_align_pos[zstepper].x),
+    parser.floatval('X', pos_dest[position_index].x),
-    parser.floatval('Y', z_auto_align_pos[zstepper].y)
+    parser.floatval('Y', pos_dest[position_index].y)
   };
 
-  if (!WITHIN(pos.x, X_MIN_POS, X_MAX_POS)) {
+  if (is_probe_point) {
+    if (!position_is_reachable_by_probe(pos.x, Y_CENTER)) {
       SERIAL_ECHOLNPGM("?(X) out of bounds.");
       return;
     }
-
+    if (!position_is_reachable_by_probe(pos)) {
-  if (!WITHIN(pos.y, Y_MIN_POS, Y_MAX_POS)) {
       SERIAL_ECHOLNPGM("?(Y) out of bounds.");
       return;
     }
+  }
 
-  z_auto_align_pos[zstepper] = pos;
+  pos_dest[position_index] = pos;
 }
 
 #endif // Z_STEPPER_AUTO_ALIGN

Marlin/src/inc/Conditionals_post.h

@@ -1808,3 +1808,10 @@
 #if !NUM_SERIAL
   #undef BAUD_RATE_GCODE
 #endif
+
+#if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+  #undef Z_STEPPER_ALIGN_AMP
+#endif
+#ifndef Z_STEPPER_ALIGN_AMP
+  #define Z_STEPPER_ALIGN_AMP 1.0
+#endif

Marlin/src/inc/SanityCheck.h

@@ -2335,11 +2335,24 @@ static_assert(   _ARR_TEST(3,0) && _ARR_TEST(3,1) && _ARR_TEST(3,2)
 #endif
 
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
+
   #if !Z_MULTI_STEPPER_DRIVERS
     #error "Z_STEPPER_AUTO_ALIGN requires Z_DUAL_STEPPER_DRIVERS or Z_TRIPLE_STEPPER_DRIVERS."
   #elif !HAS_BED_PROBE
     #error "Z_STEPPER_AUTO_ALIGN requires a Z-bed probe."
   #endif
+
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    #if DISABLED(Z_TRIPLE_STEPPER_DRIVERS)
+      #error "Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS requires Z_TRIPLE_STEPPER_DRIVERS."
+    #endif
+    constexpr float sanity_arr_screw_xy[][2] = Z_STEPPER_ALIGN_STEPPER_XY;
+    static_assert(
+      COUNT(sanity_arr_screw_xy) == Z_STEPPER_COUNT,
+      "Z_STEPPER_ALIGN_STEPPER_XY requires three {X,Y} entries (one per Z stepper)."
+    );
+  #endif
+
 #endif
 
 #if ENABLED(PRINTCOUNTER) && DISABLED(EEPROM_SETTINGS)

Marlin/src/libs/least_squares_fit.cpp

@@ -34,7 +34,7 @@
 
 #include "../inc/MarlinConfig.h"
 
-#if EITHER(AUTO_BED_LEVELING_UBL, AUTO_BED_LEVELING_LINEAR)
+#if ANY(AUTO_BED_LEVELING_UBL, AUTO_BED_LEVELING_LINEAR, Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
 
 #include "least_squares_fit.h"
 

buildroot/share/tests/DUE-tests

@@ -38,8 +38,9 @@ exec_test $1 $2 "RAMPS4DUE_EFB with ABL (Bilinear), EXTENSIBLE_UI, S-Curve, many
 
 restore_configs
 opt_set MOTHERBOARD BOARD_RADDS
-opt_enable USE_XMAX_PLUG USE_YMAX_PLUG BLTOUCH AUTO_BED_LEVELING_BILINEAR \
+opt_enable USE_XMAX_PLUG USE_YMAX_PLUG ENDSTOPPULLUPS BLTOUCH AUTO_BED_LEVELING_BILINEAR \
-           Z_TRIPLE_STEPPER_DRIVERS Z_TRIPLE_ENDSTOPS Z_STEPPER_AUTO_ALIGN ENDSTOPPULLUPS
+           Z_TRIPLE_STEPPER_DRIVERS Z_TRIPLE_ENDSTOPS Z_STEPPER_AUTO_ALIGN \
+           Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
            #LULZBOT_TOUCH_UI LCD_ALEPHOBJECTS_CLCD_UI OTHER_PIN_LAYOUT
 opt_add Z2_MAX_ENDSTOP_INVERTING false
 opt_add Z3_MAX_ENDSTOP_INVERTING false

config/default/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/3DFabXYZ/Migbot/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/ADIMLab/Gantry v1/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/ADIMLab/Gantry v2/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/AlephObjects/TAZ4/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Alfawise/U20-bltouch/Configuration_adv.h

@@ -605,18 +605,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Alfawise/U20/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/AliExpress/UM2pExt/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Anet/A2/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Anet/A2plus/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Anet/A6/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Anet/A8/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Anet/A8plus/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Anet/E16/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/AnyCubic/i3/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/ArmEd/Configuration_adv.h

@@ -608,18 +608,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/BIBO/TouchX/cyclops/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/BIBO/TouchX/default/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/BQ/Hephestos/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/BQ/Hephestos_2/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/BQ/WITBOX/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Cartesio/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/CR-10/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/CR-10S/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/CR-10_5S/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/CR-10mini/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/CR-20 Pro/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/CR-20/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/CR-8/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/Ender-2/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/Ender-3/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/Ender-4/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Creality/Ender-5/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Dagoma/Disco Ultimate/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/EVNOVO (Artillery)/Sidewinder X1/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Einstart-S/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/FYSETC/AIO_II/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/FYSETC/Cheetah 1.2/BLTouch/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/FYSETC/Cheetah 1.2/base/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/FYSETC/Cheetah/BLTouch/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/FYSETC/Cheetah/base/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/FYSETC/F6_13/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Felix/DUAL/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Felix/Single/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/FlashForge/CreatorPro/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/FolgerTech/i3-2020/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Formbot/Raptor/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Formbot/T_Rex_2+/Configuration_adv.h

@@ -608,18 +608,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Formbot/T_Rex_3/Configuration_adv.h

@@ -608,18 +608,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Geeetech/A10/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Geeetech/A10M/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Geeetech/A20M/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Geeetech/MeCreator2/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Geeetech/Prusa i3 Pro C/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Geeetech/Prusa i3 Pro W/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/HMS434/Configuration_adv.h

@@ -596,18 +596,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Infitary/i3-M508/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/JGAurora/A1/Configuration_adv.h

@@ -609,18 +609,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/JGAurora/A5/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/JGAurora/A5S/Configuration_adv.h

@@ -609,18 +609,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/MakerParts/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Malyan/M150/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Malyan/M200/Configuration_adv.h

@@ -606,18 +606,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Micromake/C1/enhanced/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Mks/Robin/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Mks/Sbase/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/RapideLite/RL200/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/RigidBot/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/SCARA/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/STM32/Black_STM32F407VET6/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Sanguinololu/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Tevo/Michelangelo/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Tevo/Tarantula Pro/Configuration_adv.h

@@ -604,14 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
-  // Set number of iterations to align
+
-  #define Z_STEPPER_ALIGN_ITERATIONS 3
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
-  // Enable to restore leveling setup after operation
+  // Currently requires triple stepper drivers.
-  #define RESTORE_LEVELING_AFTER_G34
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
-  // Use the amplification factor to de-/increase correction step.
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
-  // In case the stepper (spindle) position is further out than the test point
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
     // Use a value > 1. NOTE: This may cause instability
     #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
+  // Set number of iterations to align
+  #define Z_STEPPER_ALIGN_ITERATIONS 3
+
+  // Enable to restore leveling setup after operation
+  #define RESTORE_LEVELING_AFTER_G34
+
+  // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
+  #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
+
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Tevo/Tornado/V1 (MKS Base)/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Tevo/Tornado/V2 (MKS GEN-L)/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/TheBorg/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/TinyBoy2/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Tronxy/X3A/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Tronxy/X5S-2E/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/UltiMachine/Archim1/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/UltiMachine/Archim2/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/VORONDesign/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Velleman/K8200/Configuration_adv.h

@@ -617,18 +617,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Velleman/K8400/Dual-head/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Velleman/K8400/Single-head/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/WASP/PowerWASP/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Wanhao/Duplicator 6/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Wanhao/Duplicator i3 2.1/Configuration_adv.h

@@ -602,20 +602,32 @@
 //#define Z_STEPPER_AUTO_ALIGN
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
-  #define Z_STEPPER_ALIGN_X {  10, 150, 290 }
+  #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
-  #define Z_STEPPER_ALIGN_Y { 290,  10, 290 }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/Wanhao/Duplicator i3 Mini/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/delta/Anycubic/Kossel/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/delta/Dreammaker/Overlord/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/delta/Dreammaker/Overlord_Pro/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/delta/FLSUN/auto_calibrate/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif

config/examples/delta/FLSUN/kossel/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif