Merge pull request #5253 from thinkyhead/rc_smooth_move_ex-lax

Ensure smooth print moves even with LCD enabled

Marlin/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/Cartesio/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/Felix/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/Hephestos/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/Hephestos_2/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/K8200/Configuration_adv.h

@@ -509,6 +509,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/K8400/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/RigidBot/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/SCARA/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/TAZ4/Configuration_adv.h

@@ -504,6 +504,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/WITBOX/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/delta/biv2.5/Configuration_adv.h

@@ -498,6 +498,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/delta/generic/Configuration_adv.h

@@ -498,6 +498,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h

@@ -498,6 +498,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h

@@ -503,6 +503,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h

@@ -498,6 +498,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/makibox/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h

@@ -496,6 +496,35 @@
   #define BABYSTEP_MULTIPLICATOR 1 //faster movements
 #endif
 
+//
+// Ensure Smooth Moves
+//
+// Enable this option to prevent the machine from stuttering when printing multiple short segments.
+// This feature uses two strategies to eliminate stuttering:
+//
+// 1. During short segments a Graphical LCD update may take so much time that the planner buffer gets
+//    completely drained. When this happens pauses are introduced between short segments, and print moves
+//    will become jerky until a longer segment provides enough time for the buffer to be filled again.
+//    This jerkiness negatively affects print quality. The ENSURE_SMOOTH_MOVES option addresses the issue
+//    by pausing the LCD until there's enough time to safely update.
+//
+//    NOTE: This will cause the Info Screen to lag and controller buttons may become unresponsive.
+//          Enable ALWAYS_ALLOW_MENU to keep the controller responsive.
+//
+// 2. No block is allowed to take less time than MIN_BLOCK_TIME. That's the time it takes in the main
+//    loop to add a new block to the buffer, check temperatures, etc., including all blocked time due to
+//    interrupts (without LCD update). By enforcing a minimum time-per-move, the buffer is prevented from
+//    draining.
+//
+//#define ENSURE_SMOOTH_MOVES
+#if ENABLED(ENSURE_SMOOTH_MOVES)
+  //#define ALWAYS_ALLOW_MENU      // If enabled, the menu will always be responsive.
+                                   // WARNING: Menu navigation during short moves may cause stuttering!
+  #define LCD_UPDATE_THRESHOLD 170 // (ms) Minimum duration for the current segment to allow an LCD update.
+                                   // Default value is good for graphical LCDs (e.g., REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER).
+  #define MIN_BLOCK_TIME 6         // (ms) Minimum duration of a single block. You shouldn't need to modify this.
+#endif
+
 // @section extruder
 
 // extruder advance constant (s2/mm3)

Marlin/planner.cpp

@@ -937,13 +937,25 @@ void Planner::_buffer_line(const float &a, const float &b, const float &c, const
       if (segment_time < min_segment_time) {
         // buffer is draining, add extra time.  The amount of time added increases if the buffer is still emptied more.
         inverse_mm_s = 1000000.0 / (segment_time + lround(2 * (min_segment_time - segment_time) / moves_queued));
-        #ifdef XY_FREQUENCY_LIMIT
+        #if defined(XY_FREQUENCY_LIMIT) || ENABLED(ENSURE_SMOOTH_MOVES)
           segment_time = lround(1000000.0 / inverse_mm_s);
         #endif
       }
     }
   #endif
   
+  #if ENABLED(ENSURE_SMOOTH_MOVES)
+    #if DISABLED(SLOWDOWN)
+      unsigned long segment_time = lround(1000000.0 / inverse_mm_s);
+    #endif
+    if (segment_time < (MIN_BLOCK_TIME) * 1000UL) {
+      // buffer will be draining, set to MIN_BLOCK_TIME.
+      inverse_mm_s = 1000000.0 / (1000.0 * (MIN_BLOCK_TIME));
+      segment_time = (MIN_BLOCK_TIME) * 1000UL;
+    }
+    block->segment_time = segment_time;
+  #endif
+
   block->nominal_speed = block->millimeters * inverse_mm_s; // (mm/sec) Always > 0
   block->nominal_rate = ceil(block->step_event_count * inverse_mm_s); // (step/sec) Always > 0
 

Marlin/planner.h

@@ -124,6 +124,10 @@ typedef struct {
     uint32_t valve_pressure, e_to_p_pressure;
   #endif
   
+  #if ENABLED(ENSURE_SMOOTH_MOVES)
+    uint32_t segment_time;
+  #endif
+
 } block_t;
 
 #define BLOCK_MOD(n) ((n)&(BLOCK_BUFFER_SIZE-1))
@@ -366,6 +370,17 @@ class Planner {
         return NULL;
     }
 
+    #if ENABLED(ENSURE_SMOOTH_MOVES)
+      static bool long_move() {
+        if (blocks_queued()) {
+          block_t* block = &block_buffer[block_buffer_tail];
+          return block->segment_time > (LCD_UPDATE_THRESHOLD) * 1000UL;
+        }
+        else
+          return true;
+      }
+    #endif
+
     #if ENABLED(AUTOTEMP)
       static float autotemp_max;
       static float autotemp_min;

Marlin/ultralcd.cpp

@@ -2707,77 +2707,93 @@ void lcd_update() {
       }
     #endif // ULTIPANEL
 
+    #if ENABLED(ENSURE_SMOOTH_MOVES) && ENABLED(ALWAYS_ALLOW_MENU)
+      #define STATUS_UPDATE_CONDITION planner.long_move()
+    #else
+      #define STATUS_UPDATE_CONDITION true
+    #endif
+    #if ENABLED(ENSURE_SMOOTH_MOVES) && DISABLED(ALWAYS_ALLOW_MENU)
+      #define LCD_HANDLER_CONDITION planner.long_move()
+    #else
+      #define LCD_HANDLER_CONDITION true
+    #endif
+
     // We arrive here every ~100ms when idling often enough.
     // Instead of tracking the changes simply redraw the Info Screen ~1 time a second.
     static int8_t lcd_status_update_delay = 1; // first update one loop delayed
-    if (
+    if (STATUS_UPDATE_CONDITION &&
       #if ENABLED(ULTIPANEL)
         currentScreen == lcd_status_screen &&
       #endif
-        !lcd_status_update_delay--) {
+        !lcd_status_update_delay--
+    ) {
       lcd_status_update_delay = 9;
       lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
     }
 
-    if (lcdDrawUpdate) {
+    if (LCD_HANDLER_CONDITION) {
 
-      switch (lcdDrawUpdate) {
+      if (lcdDrawUpdate) {
-        case LCDVIEW_CALL_NO_REDRAW:
+
-          lcdDrawUpdate = LCDVIEW_NONE;
+        switch (lcdDrawUpdate) {
-          break;
+          case LCDVIEW_CALL_NO_REDRAW:
-        case LCDVIEW_CLEAR_CALL_REDRAW: // set by handlers, then altered after (rarely occurs here)
+            lcdDrawUpdate = LCDVIEW_NONE;
-        case LCDVIEW_CALL_REDRAW_NEXT:  // set by handlers, then altered after (never occurs here?)
+            break;
-          lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
+          case LCDVIEW_CLEAR_CALL_REDRAW: // set by handlers, then altered after (rarely occurs here)
-        case LCDVIEW_REDRAW_NOW:        // set above, or by a handler through LCDVIEW_CALL_REDRAW_NEXT
+          case LCDVIEW_CALL_REDRAW_NEXT:  // set by handlers, then altered after (never occurs here?)
-        case LCDVIEW_NONE:
+            lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
-          break;
+          case LCDVIEW_REDRAW_NOW:        // set above, or by a handler through LCDVIEW_CALL_REDRAW_NEXT
+          case LCDVIEW_NONE:
+            break;
+        } // switch
+
+        #if ENABLED(ULTIPANEL)
+          #define CURRENTSCREEN() (*currentScreen)(), lcd_clicked = false
+        #else
+          #define CURRENTSCREEN() lcd_status_screen()
+        #endif
+
+        #if ENABLED(DOGLCD)  // Changes due to different driver architecture of the DOGM display
+          static int8_t dot_color = 0;
+          dot_color = 1 - dot_color;
+          u8g.firstPage();
+          do {
+            lcd_setFont(FONT_MENU);
+            u8g.setPrintPos(125, 0);
+            u8g.setColorIndex(dot_color); // Set color for the alive dot
+            u8g.drawPixel(127, 63); // draw alive dot
+            u8g.setColorIndex(1); // black on white
+            CURRENTSCREEN();
+          } while (u8g.nextPage());
+        #else
+          CURRENTSCREEN();
+        #endif
       }
 
       #if ENABLED(ULTIPANEL)
-        #define CURRENTSCREEN() (*currentScreen)(), lcd_clicked = false
-      #else
-        #define CURRENTSCREEN() lcd_status_screen()
-      #endif
 
-      #if ENABLED(DOGLCD)  // Changes due to different driver architecture of the DOGM display
+        // Return to Status Screen after a timeout
-        static int8_t dot_color = 0;
+        if (currentScreen == lcd_status_screen || defer_return_to_status)
-        dot_color = 1 - dot_color;
+          return_to_status_ms = ms + LCD_TIMEOUT_TO_STATUS;
-        u8g.firstPage();
+        else if (ELAPSED(ms, return_to_status_ms))
-        do {
+          lcd_return_to_status();
-          lcd_setFont(FONT_MENU);
-          u8g.setPrintPos(125, 0);
-          u8g.setColorIndex(dot_color); // Set color for the alive dot
-          u8g.drawPixel(127, 63); // draw alive dot
-          u8g.setColorIndex(1); // black on white
-          CURRENTSCREEN();
-        } while (u8g.nextPage());
-      #else
-        CURRENTSCREEN();
-      #endif
-    }
 
-    #if ENABLED(ULTIPANEL)
+      #endif // ULTIPANEL
 
-      // Return to Status Screen after a timeout
+      switch (lcdDrawUpdate) {
-      if (currentScreen == lcd_status_screen || defer_return_to_status)
+        case LCDVIEW_CLEAR_CALL_REDRAW:
-        return_to_status_ms = ms + LCD_TIMEOUT_TO_STATUS;
+          lcd_implementation_clear();
-      else if (ELAPSED(ms, return_to_status_ms))
+        case LCDVIEW_CALL_REDRAW_NEXT:
-        lcd_return_to_status();
+          lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
+          break;
+        case LCDVIEW_REDRAW_NOW:
+          lcdDrawUpdate = LCDVIEW_NONE;
+          break;
+        case LCDVIEW_NONE:
+          break;
+      } // switch
 
-    #endif // ULTIPANEL
+    } // LCD_HANDLER_CONDITION
-
-    switch (lcdDrawUpdate) {
-      case LCDVIEW_CLEAR_CALL_REDRAW:
-        lcd_implementation_clear();
-      case LCDVIEW_CALL_REDRAW_NEXT:
-        lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
-        break;
-      case LCDVIEW_REDRAW_NOW:
-        lcdDrawUpdate = LCDVIEW_NONE;
-        break;
-      case LCDVIEW_NONE:
-        break;
-    }
 
   }
 }