Allow Zero Endstops (e.g., for CNC) (#21120)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>
This commit is contained in:
deirdreobyrne 2021-02-25 10:49:34 +00:00 committed by Scott Lahteine
parent 19c38f1a8a
commit e6bf89e82b
11 changed files with 778 additions and 739 deletions

View file

@ -1118,8 +1118,8 @@ bool unified_bed_leveling::g29_parameter_parsing() {
}
// If X or Y are not valid, use center of the bed values
if (!WITHIN(sx, X_MIN_BED, X_MAX_BED)) sx = X_CENTER;
if (!WITHIN(sy, Y_MIN_BED, Y_MAX_BED)) sy = Y_CENTER;
if (!COORDINATE_OKAY(sx, X_MIN_BED, X_MAX_BED)) sx = X_CENTER;
if (!COORDINATE_OKAY(sy, Y_MIN_BED, Y_MAX_BED)) sy = Y_CENTER;
if (err_flag) return UBL_ERR;

View file

@ -319,9 +319,13 @@ inline bool look_for_lines_to_connect() {
s.x = _GET_MESH_X( i ) + (INTERSECTION_CIRCLE_RADIUS - (CROSSHAIRS_SIZE)); // right edge
e.x = _GET_MESH_X(i + 1) - (INTERSECTION_CIRCLE_RADIUS - (CROSSHAIRS_SIZE)); // left edge
#if HAS_ENDSTOPS
LIMIT(s.x, X_MIN_POS + 1, X_MAX_POS - 1);
s.y = e.y = constrain(_GET_MESH_Y(j), Y_MIN_POS + 1, Y_MAX_POS - 1);
LIMIT(e.x, X_MIN_POS + 1, X_MAX_POS - 1);
#else
s.y = e.y = _GET_MESH_Y(j);
#endif
if (position_is_reachable(s.x, s.y) && position_is_reachable(e.x, e.y))
print_line_from_here_to_there(s, e);
@ -339,9 +343,13 @@ inline bool look_for_lines_to_connect() {
s.y = _GET_MESH_Y( j ) + (INTERSECTION_CIRCLE_RADIUS - (CROSSHAIRS_SIZE)); // top edge
e.y = _GET_MESH_Y(j + 1) - (INTERSECTION_CIRCLE_RADIUS - (CROSSHAIRS_SIZE)); // bottom edge
#if HAS_ENDSTOPS
s.x = e.x = constrain(_GET_MESH_X(i), X_MIN_POS + 1, X_MAX_POS - 1);
LIMIT(s.y, Y_MIN_POS + 1, Y_MAX_POS - 1);
LIMIT(e.y, Y_MIN_POS + 1, Y_MAX_POS - 1);
#else
s.x = e.x = _GET_MESH_X(i);
#endif
if (position_is_reachable(s.x, s.y) && position_is_reachable(e.x, e.y))
print_line_from_here_to_there(s, e);
@ -826,7 +834,7 @@ void GcodeSuite::G26() {
#if IS_KINEMATIC
// Check to make sure this segment is entirely on the bed, skip if not.
if (!position_is_reachable(p) || !position_is_reachable(q)) continue;
#else
#elif HAS_ENDSTOPS
LIMIT(p.x, X_MIN_POS + 1, X_MAX_POS - 1); // Prevent hitting the endstops
LIMIT(p.y, Y_MIN_POS + 1, Y_MAX_POS - 1);
LIMIT(q.x, X_MIN_POS + 1, X_MAX_POS - 1);

View file

@ -202,7 +202,7 @@ void GcodeSuite::M48() {
if (verbose_level > 3)
SERIAL_ECHOLNPAIR_P(PSTR("Moving inward: X"), next_pos.x, SP_Y_STR, next_pos.y);
}
#else
#elif HAS_ENDSTOPS
// For a rectangular bed just keep the probe in bounds
LIMIT(next_pos.x, X_MIN_POS, X_MAX_POS);
LIMIT(next_pos.y, Y_MIN_POS, Y_MAX_POS);

View file

@ -1195,3 +1195,10 @@
#define TOUCH_ORIENTATION TOUCH_LANDSCAPE
#endif
#endif
#if ANY(USE_XMIN_PLUG, USE_YMIN_PLUG, USE_ZMIN_PLUG, USE_XMAX_PLUG, USE_YMAX_PLUG, USE_ZMAX_PLUG)
#define HAS_ENDSTOPS 1
#define COORDINATE_OKAY(N,L,H) WITHIN(N,L,H)
#else
#define COORDINATE_OKAY(N,L,H) true
#endif

View file

@ -2016,7 +2016,8 @@ static_assert(hbm[Z_AXIS] >= 0, "HOMING_BUMP_MM.Z must be greater than or equal
&& !(ENABLED(A##_MULTI_ENDSTOPS) && WITHIN(A##2_USE_ENDSTOP, _##P##MAX_, _##P##MIN_)) )
#define _AXIS_PLUG_UNUSED_TEST(A) (_PLUG_UNUSED_TEST(A,X) && _PLUG_UNUSED_TEST(A,Y) && _PLUG_UNUSED_TEST(A,Z))
// At least 3 endstop plugs must be used
// A machine with endstops must have a minimum of 3
#if HAS_ENDSTOPS
#if _AXIS_PLUG_UNUSED_TEST(X)
#error "You must enable USE_XMIN_PLUG or USE_XMAX_PLUG."
#endif
@ -2050,6 +2051,7 @@ static_assert(hbm[Z_AXIS] >= 0, "HOMING_BUMP_MM.Z must be greater than or equal
#elif Z_HOME_DIR > 0 && DISABLED(USE_ZMAX_PLUG)
#error "Enable USE_ZMAX_PLUG when homing Z to MAX."
#endif
#endif
#if BOTH(HOME_Z_FIRST, USE_PROBE_FOR_Z_HOMING)
#error "HOME_Z_FIRST can't be used when homing Z with a probe."

View file

@ -446,10 +446,8 @@ uint8_t L64XX_Marlin::get_user_input(uint8_t &driver_count, L64XX_axis_t axis_in
position_max = X_center + displacement;
echo_min_max('X', position_min, position_max);
if (false
#ifdef X_MIN_POS
#if HAS_ENDSTOPS
|| position_min < (X_MIN_POS)
#endif
#ifdef X_MAX_POS
|| position_max > (X_MAX_POS)
#endif
) {
@ -463,10 +461,8 @@ uint8_t L64XX_Marlin::get_user_input(uint8_t &driver_count, L64XX_axis_t axis_in
position_max = Y_center + displacement;
echo_min_max('Y', position_min, position_max);
if (false
#ifdef Y_MIN_POS
#if HAS_ENDSTOPS
|| position_min < (Y_MIN_POS)
#endif
#ifdef Y_MAX_POS
|| position_max > (Y_MAX_POS)
#endif
) {
@ -480,10 +476,8 @@ uint8_t L64XX_Marlin::get_user_input(uint8_t &driver_count, L64XX_axis_t axis_in
position_max = Z_center + displacement;
echo_min_max('Z', position_min, position_max);
if (false
#ifdef Z_MIN_POS
#if HAS_ENDSTOPS
|| position_min < (Z_MIN_POS)
#endif
#ifdef Z_MAX_POS
|| position_max > (Z_MAX_POS)
#endif
) {

View file

@ -74,17 +74,6 @@
#define DEBUG_OUT ENABLED(DEBUG_LEVELING_FEATURE)
#include "../core/debug_out.h"
/**
* axis_homed
* Flags that each linear axis was homed.
* XYZ on cartesian, ABC on delta, ABZ on SCARA.
*
* axis_trusted
* Flags that the position is trusted in each linear axis. Set when homed.
* Cleared whenever a stepper powers off, potentially losing its position.
*/
uint8_t axis_homed, axis_trusted; // = 0
// Relative Mode. Enable with G91, disable with G90.
bool relative_mode; // = false;
@ -1122,6 +1111,10 @@ void prepare_line_to_destination() {
current_position = destination;
}
#if HAS_ENDSTOPS
uint8_t axis_homed, axis_trusted; // = 0
uint8_t axes_should_home(uint8_t axis_bits/*=0x07*/) {
#define SHOULD_HOME(A) TERN(HOME_AFTER_DEACTIVATE, axis_is_trusted, axis_was_homed)(A)
// Clear test bits that are trusted
@ -1380,83 +1373,9 @@ void do_homing_move(const AxisEnum axis, const float distance, const feedRate_t
}
/**
* Set an axis' current position to its home position (after homing).
*
* For Core and Cartesian robots this applies one-to-one when an
* individual axis has been homed.
*
* DELTA should wait until all homing is done before setting the XYZ
* current_position to home, because homing is a single operation.
* In the case where the axis positions are trusted and previously
* homed, DELTA could home to X or Y individually by moving either one
* to the center. However, homing Z always homes XY and Z.
*
* SCARA should wait until all XY homing is done before setting the XY
* current_position to home, because neither X nor Y is at home until
* both are at home. Z can however be homed individually.
*
* Callers must sync the planner position after calling this!
*/
void set_axis_is_at_home(const AxisEnum axis) {
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR(">>> set_axis_is_at_home(", AS_CHAR(axis_codes[axis]), ")");
set_axis_trusted(axis);
set_axis_homed(axis);
#if ENABLED(DUAL_X_CARRIAGE)
if (axis == X_AXIS && (active_extruder == 1 || dual_x_carriage_mode == DXC_DUPLICATION_MODE)) {
current_position.x = x_home_pos(active_extruder);
return;
}
#endif
#if ENABLED(MORGAN_SCARA)
scara_set_axis_is_at_home(axis);
#elif ENABLED(DELTA)
current_position[axis] = (axis == Z_AXIS) ? delta_height - TERN0(HAS_BED_PROBE, probe.offset.z) : base_home_pos(axis);
#else
current_position[axis] = base_home_pos(axis);
#endif
/**
* Z Probe Z Homing? Account for the probe's Z offset.
*/
#if HAS_BED_PROBE && Z_HOME_DIR < 0
if (axis == Z_AXIS) {
#if HOMING_Z_WITH_PROBE
current_position.z -= probe.offset.z;
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("*** Z HOMED WITH PROBE (Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN) ***\n> probe.offset.z = ", probe.offset.z);
#else
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPGM("*** Z HOMED TO ENDSTOP ***");
#endif
}
#endif
TERN_(I2C_POSITION_ENCODERS, I2CPEM.homed(axis));
TERN_(BABYSTEP_DISPLAY_TOTAL, babystep.reset_total(axis));
#if HAS_POSITION_SHIFT
position_shift[axis] = 0;
update_workspace_offset(axis);
#endif
if (DEBUGGING(LEVELING)) {
#if HAS_HOME_OFFSET
DEBUG_ECHOLNPAIR("> home_offset[", AS_CHAR(axis_codes[axis]), "] = ", home_offset[axis]);
#endif
DEBUG_POS("", current_position);
DEBUG_ECHOLNPAIR("<<< set_axis_is_at_home(", axis_codes[axis], ")");
}
}
/**
* Set an axis to be unhomed.
* Set an axis to be unhomed. (Unless we are on a machine - e.g. a cheap Chinese CNC machine -
* that has no endstops. Such machines should always be considered to be in a "known" and
* "trusted" position).
*/
void set_axis_never_homed(const AxisEnum axis) {
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR(">>> set_axis_never_homed(", axis_codes[axis], ")");
@ -1469,7 +1388,7 @@ void set_axis_never_homed(const AxisEnum axis) {
TERN_(I2C_POSITION_ENCODERS, I2CPEM.unhomed(axis));
}
#ifdef TMC_HOME_PHASE
#if ENABLED(TMC_HOME_PHASE)
/**
* Move the axis back to its home_phase if set and driver is capable (TMC)
*
@ -1877,6 +1796,84 @@ void homeaxis(const AxisEnum axis) {
} // homeaxis()
#endif // HAS_ENDSTOPS
/**
* Set an axis' current position to its home position (after homing).
*
* For Core and Cartesian robots this applies one-to-one when an
* individual axis has been homed.
*
* DELTA should wait until all homing is done before setting the XYZ
* current_position to home, because homing is a single operation.
* In the case where the axis positions are trusted and previously
* homed, DELTA could home to X or Y individually by moving either one
* to the center. However, homing Z always homes XY and Z.
*
* SCARA should wait until all XY homing is done before setting the XY
* current_position to home, because neither X nor Y is at home until
* both are at home. Z can however be homed individually.
*
* Callers must sync the planner position after calling this!
*/
void set_axis_is_at_home(const AxisEnum axis) {
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR(">>> set_axis_is_at_home(", AS_CHAR(axis_codes[axis]), ")");
set_axis_trusted(axis);
set_axis_homed(axis);
#if ENABLED(DUAL_X_CARRIAGE)
if (axis == X_AXIS && (active_extruder == 1 || dual_x_carriage_mode == DXC_DUPLICATION_MODE)) {
current_position.x = x_home_pos(active_extruder);
return;
}
#endif
#if ENABLED(MORGAN_SCARA)
scara_set_axis_is_at_home(axis);
#elif ENABLED(DELTA)
current_position[axis] = (axis == Z_AXIS) ? delta_height - TERN0(HAS_BED_PROBE, probe.offset.z) : base_home_pos(axis);
#else
current_position[axis] = base_home_pos(axis);
#endif
/**
* Z Probe Z Homing? Account for the probe's Z offset.
*/
#if HAS_BED_PROBE && Z_HOME_DIR < 0
if (axis == Z_AXIS) {
#if HOMING_Z_WITH_PROBE
current_position.z -= probe.offset.z;
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("*** Z HOMED WITH PROBE (Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN) ***\n> probe.offset.z = ", probe.offset.z);
#else
if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPGM("*** Z HOMED TO ENDSTOP ***");
#endif
}
#endif
TERN_(I2C_POSITION_ENCODERS, I2CPEM.homed(axis));
TERN_(BABYSTEP_DISPLAY_TOTAL, babystep.reset_total(axis));
#if HAS_POSITION_SHIFT
position_shift[axis] = 0;
update_workspace_offset(axis);
#endif
if (DEBUGGING(LEVELING)) {
#if HAS_HOME_OFFSET
DEBUG_ECHOLNPAIR("> home_offset[", AS_CHAR(axis_codes[axis]), "] = ", home_offset[axis]);
#endif
DEBUG_POS("", current_position);
DEBUG_ECHOLNPAIR("<<< set_axis_is_at_home(", axis_codes[axis], ")");
}
}
#if HAS_WORKSPACE_OFFSET
void update_workspace_offset(const AxisEnum axis) {
workspace_offset[axis] = home_offset[axis] + position_shift[axis];
@ -1893,4 +1890,4 @@ void homeaxis(const AxisEnum axis) {
home_offset[axis] = v;
update_workspace_offset(axis);
}
#endif // HAS_M206_COMMAND
#endif

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@ -284,13 +284,43 @@ void do_z_clearance(const float &zclear, const bool z_trusted=true, const bool r
* Homing and Trusted Axes
*/
constexpr uint8_t xyz_bits = _BV(X_AXIS) | _BV(Y_AXIS) | _BV(Z_AXIS);
extern uint8_t axis_homed, axis_trusted;
void homeaxis(const AxisEnum axis);
void set_axis_is_at_home(const AxisEnum axis);
#if HAS_ENDSTOPS
/**
* axis_homed
* Flags that each linear axis was homed.
* XYZ on cartesian, ABC on delta, ABZ on SCARA.
*
* axis_trusted
* Flags that the position is trusted in each linear axis. Set when homed.
* Cleared whenever a stepper powers off, potentially losing its position.
*/
extern uint8_t axis_homed, axis_trusted;
void homeaxis(const AxisEnum axis);
void set_axis_never_homed(const AxisEnum axis);
uint8_t axes_should_home(uint8_t axis_bits=0x07);
bool homing_needed_error(uint8_t axis_bits=0x07);
FORCE_INLINE void set_axis_unhomed(const AxisEnum axis) { CBI(axis_homed, axis); }
FORCE_INLINE void set_axis_untrusted(const AxisEnum axis) { CBI(axis_trusted, axis); }
FORCE_INLINE void set_all_unhomed() { axis_homed = axis_trusted = 0; }
FORCE_INLINE void set_axis_homed(const AxisEnum axis) { SBI(axis_homed, axis); }
FORCE_INLINE void set_axis_trusted(const AxisEnum axis) { SBI(axis_trusted, axis); }
FORCE_INLINE void set_all_homed() { axis_homed = axis_trusted = xyz_bits; }
#else
constexpr uint8_t axis_homed = xyz_bits, axis_trusted = xyz_bits; // Zero-endstop machines are always homed and trusted
FORCE_INLINE void homeaxis(const AxisEnum axis) {}
FORCE_INLINE void set_axis_never_homed(const AxisEnum) {}
FORCE_INLINE uint8_t axes_should_home(uint8_t=0x07) { return false; }
FORCE_INLINE bool homing_needed_error(uint8_t=0x07) { return false; }
FORCE_INLINE void set_axis_unhomed(const AxisEnum axis) {}
FORCE_INLINE void set_axis_untrusted(const AxisEnum axis) {}
FORCE_INLINE void set_all_unhomed() {}
FORCE_INLINE void set_axis_homed(const AxisEnum axis) {}
FORCE_INLINE void set_axis_trusted(const AxisEnum axis) {}
FORCE_INLINE void set_all_homed() {}
#endif
FORCE_INLINE bool axis_was_homed(const AxisEnum axis) { return TEST(axis_homed, axis); }
FORCE_INLINE bool axis_is_trusted(const AxisEnum axis) { return TEST(axis_trusted, axis); }
@ -299,12 +329,6 @@ FORCE_INLINE bool no_axes_homed() { return !axis_homed;
FORCE_INLINE bool all_axes_homed() { return xyz_bits == (axis_homed & xyz_bits); }
FORCE_INLINE bool homing_needed() { return !all_axes_homed(); }
FORCE_INLINE bool all_axes_trusted() { return xyz_bits == (axis_trusted & xyz_bits); }
FORCE_INLINE void set_axis_homed(const AxisEnum axis) { SBI(axis_homed, axis); }
FORCE_INLINE void set_axis_unhomed(const AxisEnum axis) { CBI(axis_homed, axis); }
FORCE_INLINE void set_axis_trusted(const AxisEnum axis) { SBI(axis_trusted, axis); }
FORCE_INLINE void set_axis_untrusted(const AxisEnum axis) { CBI(axis_trusted, axis); }
FORCE_INLINE void set_all_homed() { axis_homed = axis_trusted = xyz_bits; }
FORCE_INLINE void set_all_unhomed() { axis_homed = axis_trusted = 0; }
#if ENABLED(NO_MOTION_BEFORE_HOMING)
#define MOTION_CONDITIONS (IsRunning() && !homing_needed_error())
@ -360,7 +384,6 @@ FORCE_INLINE void set_all_unhomed() { axis_homed = axis_tr
/**
* position_is_reachable family of functions
*/
#if IS_KINEMATIC // (DELTA or SCARA)
#if HAS_SCARA_OFFSET
@ -390,14 +413,14 @@ FORCE_INLINE void set_all_unhomed() { axis_homed = axis_tr
// Return true if the given position is within the machine bounds.
inline bool position_is_reachable(const float &rx, const float &ry) {
if (!WITHIN(ry, Y_MIN_POS - fslop, Y_MAX_POS + fslop)) return false;
if (!COORDINATE_OKAY(ry, Y_MIN_POS - fslop, Y_MAX_POS + fslop)) return false;
#if ENABLED(DUAL_X_CARRIAGE)
if (active_extruder)
return WITHIN(rx, X2_MIN_POS - fslop, X2_MAX_POS + fslop);
return COORDINATE_OKAY(rx, X2_MIN_POS - fslop, X2_MAX_POS + fslop);
else
return WITHIN(rx, X1_MIN_POS - fslop, X1_MAX_POS + fslop);
return COORDINATE_OKAY(rx, X1_MIN_POS - fslop, X1_MAX_POS + fslop);
#else
return WITHIN(rx, X_MIN_POS - fslop, X_MAX_POS + fslop);
return COORDINATE_OKAY(rx, X_MIN_POS - fslop, X_MAX_POS + fslop);
#endif
}
inline bool position_is_reachable(const xy_pos_t &pos) { return position_is_reachable(pos.x, pos.y); }

View file

@ -564,10 +564,10 @@ class Planner {
#if ENABLED(SKEW_CORRECTION)
FORCE_INLINE static void skew(float &cx, float &cy, const float &cz) {
if (WITHIN(cx, X_MIN_POS + 1, X_MAX_POS) && WITHIN(cy, Y_MIN_POS + 1, Y_MAX_POS)) {
if (COORDINATE_OKAY(cx, X_MIN_POS + 1, X_MAX_POS) && COORDINATE_OKAY(cy, Y_MIN_POS + 1, Y_MAX_POS)) {
const float sx = cx - cy * skew_factor.xy - cz * (skew_factor.xz - (skew_factor.xy * skew_factor.yz)),
sy = cy - cz * skew_factor.yz;
if (WITHIN(sx, X_MIN_POS, X_MAX_POS) && WITHIN(sy, Y_MIN_POS, Y_MAX_POS)) {
if (COORDINATE_OKAY(sx, X_MIN_POS, X_MAX_POS) && COORDINATE_OKAY(sy, Y_MIN_POS, Y_MAX_POS)) {
cx = sx; cy = sy;
}
}
@ -575,10 +575,10 @@ class Planner {
FORCE_INLINE static void skew(xyz_pos_t &raw) { skew(raw.x, raw.y, raw.z); }
FORCE_INLINE static void unskew(float &cx, float &cy, const float &cz) {
if (WITHIN(cx, X_MIN_POS, X_MAX_POS) && WITHIN(cy, Y_MIN_POS, Y_MAX_POS)) {
if (COORDINATE_OKAY(cx, X_MIN_POS, X_MAX_POS) && COORDINATE_OKAY(cy, Y_MIN_POS, Y_MAX_POS)) {
const float sx = cx + cy * skew_factor.xy + cz * skew_factor.xz,
sy = cy + cz * skew_factor.yz;
if (WITHIN(sx, X_MIN_POS, X_MAX_POS) && WITHIN(sy, Y_MIN_POS, Y_MAX_POS)) {
if (COORDINATE_OKAY(sx, X_MIN_POS, X_MAX_POS) && COORDINATE_OKAY(sy, Y_MIN_POS, Y_MAX_POS)) {
cx = sx; cy = sy;
}
}

View file

@ -92,8 +92,8 @@ public:
*/
static bool can_reach(const float &rx, const float &ry) {
return position_is_reachable(rx - offset_xy.x, ry - offset_xy.y)
&& WITHIN(rx, min_x() - fslop, max_x() + fslop)
&& WITHIN(ry, min_y() - fslop, max_y() + fslop);
&& COORDINATE_OKAY(rx, min_x() - fslop, max_x() + fslop)
&& COORDINATE_OKAY(ry, min_y() - fslop, max_y() + fslop);
}
#endif
@ -206,8 +206,8 @@ public:
#if IS_KINEMATIC
return HYPOT2(x, y) <= sq(probe_radius(default_probe_xy_offset));
#else
return WITHIN(x, _min_x(default_probe_xy_offset) - fslop, _max_x(default_probe_xy_offset) + fslop)
&& WITHIN(y, _min_y(default_probe_xy_offset) - fslop, _max_y(default_probe_xy_offset) + fslop);
return COORDINATE_OKAY(x, _min_x(default_probe_xy_offset) - fslop, _max_x(default_probe_xy_offset) + fslop)
&& COORDINATE_OKAY(y, _min_y(default_probe_xy_offset) - fslop, _max_y(default_probe_xy_offset) + fslop);
#endif
}

View file

@ -10,6 +10,14 @@ restore_configs
opt_set MOTHERBOARD BOARD_TEENSY31_32
exec_test $1 $2 "Teensy3.1 with default config" "$3"
#
# Zero endstops, as with a CNC
#
restore_configs
opt_set MOTHERBOARD BOARD_TEENSY31_32
opt_disable USE_XMIN_PLUG USE_YMIN_PLUG USE_ZMIN_PLUG
exec_test $1 $2 "Teensy3.1 with Zero Endstops" "$3"
#
# Test many features together
#