Merge pull request #3524 from thinkyhead/rc_fix_mbl_oopsie_1

Oops! Fix MBL move Z to MESH_HOME_SEARCH_Z between probes

Marlin/Marlin_main.cpp

     saved_feedrate = feedrate;
     feedrate = homing_feedrate[X_AXIS];
 
-    #if MIN_Z_HEIGHT_FOR_HOMING > 0
-      current_position[Z_AXIS] = MESH_HOME_SEARCH_Z + MIN_Z_HEIGHT_FOR_HOMING;
-      line_to_current_position();
-    #endif
+    current_position[Z_AXIS] = MESH_HOME_SEARCH_Z
+      #if MIN_Z_HEIGHT_FOR_HOMING > 0
+        + MIN_Z_HEIGHT_FOR_HOMING
+      #endif
+    ;
+    line_to_current_position();
 
     current_position[X_AXIS] = x + home_offset[X_AXIS];
     current_position[Y_AXIS] = y + home_offset[Y_AXIS];
     if (Z_start_location < Z_RAISE_BEFORE_PROBING * 2.0)
       do_blocking_move_to_z(Z_start_location);
 
-    do_blocking_move_to_xy(X_probe_location - X_PROBE_OFFSET_FROM_EXTRUDER, Y_probe_location - Y_PROBE_OFFSET_FROM_EXTRUDER);
+    do_blocking_move_to_xy(X_probe_location - (X_PROBE_OFFSET_FROM_EXTRUDER), Y_probe_location - (Y_PROBE_OFFSET_FROM_EXTRUDER));
 
     /**
      * OK, do the initial probe to get us close to the bed.
           while (angle < 0.0)     // outside of this range.   It looks like they behave correctly with
             angle += 360.0;       // numbers outside of the range, but just to be safe we clamp them.
 
-          X_current = X_probe_location - X_PROBE_OFFSET_FROM_EXTRUDER + cos(RADIANS(angle)) * radius;
-          Y_current = Y_probe_location - Y_PROBE_OFFSET_FROM_EXTRUDER + sin(RADIANS(angle)) * radius;
+          X_current = X_probe_location - (X_PROBE_OFFSET_FROM_EXTRUDER) + cos(RADIANS(angle)) * radius;
+          Y_current = Y_probe_location - (Y_PROBE_OFFSET_FROM_EXTRUDER) + sin(RADIANS(angle)) * radius;
 
           #if DISABLED(DELTA)
             X_current = constrain(X_current, X_MIN_POS, X_MAX_POS);
        * height. This gets us back to the probe location at the same height that
        * we have been running around the circle at.
        */
-      do_blocking_move_to_xy(X_probe_location - X_PROBE_OFFSET_FROM_EXTRUDER, Y_probe_location - Y_PROBE_OFFSET_FROM_EXTRUDER);
+      do_blocking_move_to_xy(X_probe_location - (X_PROBE_OFFSET_FROM_EXTRUDER), Y_probe_location - (Y_PROBE_OFFSET_FROM_EXTRUDER));
       if (deploy_probe_for_each_reading)
         sample_set[n] = probe_pt(X_probe_location, Y_probe_location, Z_RAISE_BEFORE_PROBING, ProbeDeployAndStow, verbose_level);
       else {

Marlin/example_configurations/Hephestos_2/Configuration.h

 
 #if ENABLED(MESH_BED_LEVELING)
   #define MESH_MIN_X 10
-  #define MESH_MAX_X (X_MAX_POS - MESH_MIN_X)
+  #define MESH_MAX_X (X_MAX_POS - (MESH_MIN_X))
   #define MESH_MIN_Y 10
-  #define MESH_MAX_Y (Y_MAX_POS - MESH_MIN_Y)
+  #define MESH_MAX_Y (Y_MAX_POS - (MESH_MIN_Y))
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
   #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
   #if ENABLED(AUTO_BED_LEVELING_GRID)
 
     #define LEFT_PROBE_BED_POSITION  X_MIN_POS + X_PROBE_OFFSET_FROM_EXTRUDER
-    #define RIGHT_PROBE_BED_POSITION X_MAX_POS - X_PROBE_OFFSET_FROM_EXTRUDER
+    #define RIGHT_PROBE_BED_POSITION X_MAX_POS - (X_PROBE_OFFSET_FROM_EXTRUDER)
     #define FRONT_PROBE_BED_POSITION Y_MIN_POS + Y_PROBE_OFFSET_FROM_EXTRUDER
-    #define BACK_PROBE_BED_POSITION  Y_MAX_POS - Y_PROBE_OFFSET_FROM_EXTRUDER
+    #define BACK_PROBE_BED_POSITION  Y_MAX_POS - (Y_PROBE_OFFSET_FROM_EXTRUDER)
 
     #define MIN_PROBE_EDGE 10 // The Z probe minimum square sides can be no smaller than this.
 
     // A simple cross-product is used to estimate the plane of the bed.
     #define ABL_PROBE_PT_1_X X_MIN_POS + X_PROBE_OFFSET_FROM_EXTRUDER
     #define ABL_PROBE_PT_1_Y Y_MIN_POS + Y_PROBE_OFFSET_FROM_EXTRUDER
-    #define ABL_PROBE_PT_2_X X_MAX_POS - X_PROBE_OFFSET_FROM_EXTRUDER
+    #define ABL_PROBE_PT_2_X X_MAX_POS - (X_PROBE_OFFSET_FROM_EXTRUDER)
     #define ABL_PROBE_PT_2_Y Y_MIN_POS + Y_PROBE_OFFSET_FROM_EXTRUDER
     #define ABL_PROBE_PT_3_X ((X_MIN_POS + X_MAX_POS) / 2)
-    #define ABL_PROBE_PT_3_Y Y_MAX_POS - Y_PROBE_OFFSET_FROM_EXTRUDER
+    #define ABL_PROBE_PT_3_Y Y_MAX_POS - (Y_PROBE_OFFSET_FROM_EXTRUDER)
 
   #endif // AUTO_BED_LEVELING_GRID
 

Marlin/ultralcd.cpp

   // Z position will be restored with the final action, a G28
   inline void _mbl_goto_xy(float x, float y) {
     mbl_wait_for_move = true;
-    #if MIN_Z_HEIGHT_FOR_HOMING > 0
-      current_position[Z_AXIS] += MIN_Z_HEIGHT_FOR_HOMING;
-      line_to_current(Z_AXIS);
-    #endif
+    current_position[Z_AXIS] = MESH_HOME_SEARCH_Z
+      #if MIN_Z_HEIGHT_FOR_HOMING > 0
+        + MIN_Z_HEIGHT_FOR_HOMING
+      #endif
+    ;
+    line_to_current(Z_AXIS);
     current_position[X_AXIS] = x + home_offset[X_AXIS];
     current_position[Y_AXIS] = y + home_offset[Y_AXIS];
     line_to_current(manual_feedrate[X_AXIS] <= manual_feedrate[Y_AXIS] ? X_AXIS : Y_AXIS);