Add threshold distance to Z calibration

Add missing if statement

Firmware/Marlin_main.cpp

@@ -2876,7 +2876,8 @@ bool gcode_M45(bool onlyZ, int8_t verbosity_level)
 #endif //TMC2130
 		enable_endstops(endstops_enabled);
 
-		if (st_get_position_mm(Z_AXIS) == MESH_HOME_Z_SEARCH)
+		if ((st_get_position_mm(Z_AXIS) <= (MESH_HOME_Z_SEARCH + HOME_Z_SEARCH_THRESHOLD)) ||
+		    (st_get_position_mm(Z_AXIS) >= (MESH_HOME_Z_SEARCH - HOME_Z_SEARCH_THRESHOLD)))
 		{
 			if (onlyZ)
 			{

Firmware/variants/1_75mm_MK2-RAMBo10a-E3Dv6full.h

@@ -257,7 +257,8 @@ BED SETTINGS
 #define BED_ADJUSTMENT_UM_MAX 100
 
 #define MESH_HOME_Z_CALIB 0.2
-#define MESH_HOME_Z_SEARCH 5 //Z lift for homing, mesh bed leveling etc.
+#define MESH_HOME_Z_SEARCH 5.f           // Z lift for homing, mesh bed leveling etc.
+#define HOME_Z_SEARCH_THRESHOLD 0.15f   // Threshold of the Z height in claibration
 
 #define X_PROBE_OFFSET_FROM_EXTRUDER 23     // Z probe to nozzle X offset: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 9     // Z probe to nozzle Y offset: -front +behind

Firmware/variants/1_75mm_MK2-RAMBo13a-E3Dv6full.h

@@ -256,7 +256,8 @@ BED SETTINGS
 #define BED_ADJUSTMENT_UM_MAX 100
 
 #define MESH_HOME_Z_CALIB 0.2
-#define MESH_HOME_Z_SEARCH 5 //Z lift for homing, mesh bed leveling etc.
+#define MESH_HOME_Z_SEARCH 5.f           // Z lift for homing, mesh bed leveling etc.
+#define HOME_Z_SEARCH_THRESHOLD 0.15f   // Threshold of the Z height in claibration
 
 #define X_PROBE_OFFSET_FROM_EXTRUDER 23     // Z probe to nozzle X offset: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 9     // Z probe to nozzle Y offset: -front +behind

Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h

@@ -314,7 +314,8 @@
 #define BED_ADJUSTMENT_UM_MAX 100
 
 #define MESH_HOME_Z_CALIB 0.2
-#define MESH_HOME_Z_SEARCH 5 //Z lift for homing, mesh bed leveling etc.
+#define MESH_HOME_Z_SEARCH 5.f           // Z lift for homing, mesh bed leveling etc.
+#define HOME_Z_SEARCH_THRESHOLD 0.15f   // Threshold of the Z height in claibration
 
 #define X_PROBE_OFFSET_FROM_EXTRUDER 23     // Z probe to nozzle X offset: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 5     // Z probe to nozzle Y offset: -front +behind

Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h

@@ -315,7 +315,8 @@
 #define BED_ADJUSTMENT_UM_MAX 100
 
 #define MESH_HOME_Z_CALIB 0.2
-#define MESH_HOME_Z_SEARCH 5 //Z lift for homing, mesh bed leveling etc.
+#define MESH_HOME_Z_SEARCH 5.f           // Z lift for homing, mesh bed leveling etc.
+#define HOME_Z_SEARCH_THRESHOLD 0.15f   // Threshold of the Z height in claibration
 
 #define X_PROBE_OFFSET_FROM_EXTRUDER 23     // Z probe to nozzle X offset: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 5     // Z probe to nozzle Y offset: -front +behind

Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h

@@ -314,7 +314,8 @@
 #define BED_ADJUSTMENT_UM_MAX 100
 
 #define MESH_HOME_Z_CALIB 0.2
-#define MESH_HOME_Z_SEARCH 5 //Z lift for homing, mesh bed leveling etc.
+#define MESH_HOME_Z_SEARCH 5.f           // Z lift for homing, mesh bed leveling etc.
+#define HOME_Z_SEARCH_THRESHOLD 0.15f   // Threshold of the Z height in claibration
 
 #define X_PROBE_OFFSET_FROM_EXTRUDER 23     // Z probe to nozzle X offset: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 5     // Z probe to nozzle Y offset: -front +behind

Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h

@@ -315,7 +315,8 @@
 #define BED_ADJUSTMENT_UM_MAX 100
 
 #define MESH_HOME_Z_CALIB 0.2
-#define MESH_HOME_Z_SEARCH 5 //Z lift for homing, mesh bed leveling etc.
+#define MESH_HOME_Z_SEARCH 5.f           // Z lift for homing, mesh bed leveling etc.
+#define HOME_Z_SEARCH_THRESHOLD 0.15f   // Threshold of the Z height in claibration
 
 #define X_PROBE_OFFSET_FROM_EXTRUDER 23     // Z probe to nozzle X offset: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 5     // Z probe to nozzle Y offset: -front +behind

Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h

@@ -422,7 +422,8 @@
 #define BED_ADJUSTMENT_UM_MAX 100
 
 #define MESH_HOME_Z_CALIB 0.2
-#define MESH_HOME_Z_SEARCH 5 //Z lift for homing, mesh bed leveling etc.
+#define MESH_HOME_Z_SEARCH 5.f           // Z lift for homing, mesh bed leveling etc.
+#define HOME_Z_SEARCH_THRESHOLD 0.15f   // Threshold of the Z height in claibration
 
 #define X_PROBE_OFFSET_FROM_EXTRUDER 23     // Z probe to nozzle X offset: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 5     // Z probe to nozzle Y offset: -front +behind

Firmware/variants/1_75mm_MK3S-EINSy10a-E3Dv6full.h

@@ -424,7 +424,8 @@
 #define BED_ADJUSTMENT_UM_MAX 100
 
 #define MESH_HOME_Z_CALIB 0.2
-#define MESH_HOME_Z_SEARCH 5 //Z lift for homing, mesh bed leveling etc.
+#define MESH_HOME_Z_SEARCH 5.f           // Z lift for homing, mesh bed leveling etc.
+#define HOME_Z_SEARCH_THRESHOLD 0.15f   // Threshold of the Z height in claibration
 
 #define X_PROBE_OFFSET_FROM_EXTRUDER 23     // Z probe to nozzle X offset: -left  +right
 #define Y_PROBE_OFFSET_FROM_EXTRUDER 5     // Z probe to nozzle Y offset: -front +behind