Add option to move away from endstop after homing. (#13557)

Add option to move away from endstop after homing.
- Add `ENDSTOP_BACKOFF` for printers with a recessed Z home button (Lulzbot TAZ 6).
- Also prevents chattering when sensorless homing with axes against bumpers.

Marlin/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

Marlin/src/gcode/calibrate/G28.cpp

@@ -182,7 +182,6 @@
  *
  */
 void GcodeSuite::G28(const bool always_home_all) {
-
   if (DEBUGGING(LEVELING)) {
     DEBUG_ECHOLNPGM(">>> G28");
     log_machine_info();
@@ -268,13 +267,16 @@ void GcodeSuite::G28(const bool always_home_all) {
     const bool homeX = always_home_all || parser.seen('X'),
                homeY = always_home_all || parser.seen('Y'),
                homeZ = always_home_all || parser.seen('Z'),
-               home_all = (!homeX && !homeY && !homeZ) || (homeX && homeY && homeZ);
+               home_all = (!homeX && !homeY && !homeZ) || (homeX && homeY && homeZ),
+               doX = home_all || homeX,
+               doY = home_all || homeY,
+               doZ = home_all || homeZ;
 
     set_destination_from_current();
 
     #if Z_HOME_DIR > 0  // If homing away from BED do Z first
 
-      if (home_all || homeZ) homeaxis(Z_AXIS);
+      if (doZ) homeaxis(Z_AXIS);
 
     #endif
 
@@ -285,7 +287,7 @@ void GcodeSuite::G28(const bool always_home_all) {
           (parser.seenval('R') ? parser.value_linear_units() : Z_HOMING_HEIGHT)
     );
 
-    if (z_homing_height && (home_all || homeX || homeY)) {
+    if (z_homing_height && (doX || doY)) {
       // Raise Z before homing any other axes and z is not already high enough (never lower z)
       destination[Z_AXIS] = z_homing_height;
       if (destination[Z_AXIS] > current_position[Z_AXIS]) {
@@ -296,25 +298,25 @@ void GcodeSuite::G28(const bool always_home_all) {
 
     #if ENABLED(QUICK_HOME)
 
-      if (home_all || (homeX && homeY)) quick_home_xy();
+      if (doX && doY) quick_home_xy();
 
     #endif
 
     // Home Y (before X)
     #if ENABLED(HOME_Y_BEFORE_X)
 
-      if (home_all || homeY
+      if (doY
         #if ENABLED(CODEPENDENT_XY_HOMING)
-          || homeX
+          || doX
         #endif
       ) homeaxis(Y_AXIS);
 
     #endif
 
     // Home X
-    if (home_all || homeX
+    if (doX
       #if ENABLED(CODEPENDENT_XY_HOMING) && DISABLED(HOME_Y_BEFORE_X)
-        || homeY
+        || doY
       #endif
     ) {
 
@@ -345,12 +347,12 @@ void GcodeSuite::G28(const bool always_home_all) {
 
     // Home Y (after X)
     #if DISABLED(HOME_Y_BEFORE_X)
-      if (home_all || homeY) homeaxis(Y_AXIS);
+      if (doY) homeaxis(Y_AXIS);
     #endif
 
     // Home Z last if homing towards the bed
     #if Z_HOME_DIR < 0
-      if (home_all || homeZ) {
+      if (doZ) {
         #if ENABLED(Z_SAFE_HOMING)
           home_z_safely();
         #else
@@ -361,7 +363,7 @@ void GcodeSuite::G28(const bool always_home_all) {
           move_z_after_probing();
         #endif
 
-      } // home_all || homeZ
+      } // doZ
     #endif // Z_HOME_DIR < 0
 
     sync_plan_position();
@@ -402,6 +404,16 @@ void GcodeSuite::G28(const bool always_home_all) {
 
   #endif // DUAL_X_CARRIAGE
 
+  #ifdef HOMING_BACKOFF_MM
+    endstops.enable(false);
+    constexpr float backoff[XYZ] = HOMING_BACKOFF_MM;
+    const float backoff_x = doX ? ABS(endstop_backoff[X_AXIS]) * (X_HOME_DIR) : 0,
+                backoff_y = doY ? ABS(endstop_backoff[Y_AXIS]) * (Y_HOME_DIR) : 0,
+                backoff_z = doZ ? ABS(endstop_backoff[Z_AXIS]) * (Z_HOME_DIR) : 0;
+    if (backoff_z) do_blocking_move_to_z(current_position[Z_AXIS] - backoff_z);
+    if (backoff_x || backoff_y) do_blocking_move_to_xy(current_position[X_AXIS] - backoff_x, current_position[Y_AXIS] - backoff_y);
+  #endif
+
   endstops.not_homing();
 
   #if BOTH(DELTA, DELTA_HOME_TO_SAFE_ZONE)
@@ -432,7 +444,7 @@ void GcodeSuite::G28(const bool always_home_all) {
     #if ENABLED(NANODLP_ALL_AXIS)
       #define _HOME_SYNC true       // For any axis, output sync text.
     #else
-      #define _HOME_SYNC (home_all || homeZ)  // Only for Z-axis
+      #define _HOME_SYNC doZ        // Only for Z-axis
     #endif
     if (_HOME_SYNC)
       SERIAL_ECHOLNPGM(MSG_Z_MOVE_COMP);

config/default/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/AlephObjects/TAZ4/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 4
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/AliExpress/UM2pExt/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Anet/A2/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Anet/A2plus/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Anet/A6/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Anet/A8/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/AnyCubic/i3/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/ArmEd/Configuration_adv.h

@@ -460,6 +460,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/BQ/Hephestos/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/BQ/Hephestos_2/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 1
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 #define HOME_Y_BEFORE_X

config/examples/BQ/WITBOX/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Cartesio/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 #define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 1
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Einstart-S/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Felix/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 3
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/FlashForge/CreatorPro/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Formbot/Raptor/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -460,6 +460,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Formbot/T_Rex_3/Configuration_adv.h

@@ -460,6 +460,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Geeetech/A10M/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Geeetech/A20M/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Geeetech/MeCreator2/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 1
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/JGAurora/A5/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 10, 10, 6 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/MakerParts/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Malyan/M150/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Malyan/M200/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Mks/Robin/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Mks/Sbase/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/RapideLite/RL200/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/RigidBot/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/SCARA/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 3
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Sanguinololu/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/TheBorg/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/TinyBoy2/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Tronxy/X3A/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/UltiMachine/Archim1/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/UltiMachine/Archim2/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/VORONDesign/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Velleman/K8200/Configuration_adv.h

@@ -469,6 +469,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 4, 4, 8 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/Velleman/K8400/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 3
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                       // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/WASP/PowerWASP/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 #define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

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

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/delta/Geeetech/Rostock 301/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/delta/MKS/SBASE/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/delta/Tevo Little Monster/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/delta/generic/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/delta/kossel_mini/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 5 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 10, 10, 10 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/delta/kossel_xl/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2 // deltas need the same for all three axes
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/gCreate/gMax1.5+/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/makibox/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/tvrrug/Round2/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 1
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X

config/examples/wt150/Configuration_adv.h

@@ -456,6 +456,7 @@
 #define Z_HOME_BUMP_MM 2
 #define HOMING_BUMP_DIVISOR { 2, 2, 4 }  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME                     // If homing includes X and Y, do a diagonal move initially
+//#define HOMING_BACKOFF_MM { 2, 2, 2 }  // (mm) Move away from the endstops after homing
 
 // When G28 is called, this option will make Y home before X
 //#define HOME_Y_BEFORE_X