Formatting and spelling

Marlin/Marlin_main.cpp

@@ -6081,7 +6081,7 @@ inline void gcode_M17() {
       stepper.synchronize();
     }
 
-    #if ENABLED(ULTIPANEL) && defined(ADVANCED_PAUSE_EXTRUDE_LENGTH) && ADVANCED_PAUSE_EXTRUDE_LENGTH > 0
+    #if ENABLED(ULTIPANEL) && ADVANCED_PAUSE_EXTRUDE_LENGTH > 0
 
       float extrude_length = initial_extrude_length;
 
@@ -7675,7 +7675,7 @@ inline void gcode_M18_M84() {
       if (parser.seen('X')) disable_X();
       if (parser.seen('Y')) disable_Y();
       if (parser.seen('Z')) disable_Z();
-      #if E0_ENABLE_PIN != X_ENABLE_PIN && E1_ENABLE_PIN != Y_ENABLE_PIN // Only enable on boards that have seperate ENABLE_PINS
+      #if E0_ENABLE_PIN != X_ENABLE_PIN && E1_ENABLE_PIN != Y_ENABLE_PIN // Only enable on boards that have separate ENABLE_PINS
         if (parser.seen('E')) disable_e_steppers();
       #endif
     }

Marlin/mesh_bed_leveling.h

@@ -94,8 +94,8 @@
     }
 
     static float calc_z0(const float &a0, const float &a1, const float &z1, const float &a2, const float &z2) {
-      const float delta_z = (z2 - z1) / (a2 - a1);
-      const float delta_a = a0 - a1;
+      const float delta_z = (z2 - z1) / (a2 - a1),
+                  delta_a = a0 - a1;
       return z1 + delta_a * delta_z;
     }
 

Marlin/planner.cpp

@@ -534,7 +534,7 @@ void Planner::check_axes_activity() {
       if (!ubl.state.active) return;
       #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
         // if z_fade_height enabled (nonzero) and raw_z above it, no leveling required
-        if ((planner.z_fade_height) && (planner.z_fade_height <= RAW_Z_POSITION(lz))) return;
+        if (planner.z_fade_height && planner.z_fade_height <= RAW_Z_POSITION(lz)) return;
         lz += ubl.state.z_offset + ubl.get_z_correction(lx, ly) * ubl.fade_scaling_factor_for_z(lz);
       #else // no fade
         lz += ubl.state.z_offset + ubl.get_z_correction(lx, ly);
@@ -598,9 +598,9 @@ void Planner::check_axes_activity() {
 
       if (ubl.state.active) {
 
-        const float z_physical = RAW_Z_POSITION(logical[Z_AXIS]);
-        const float z_ublmesh  = ubl.get_z_correction(logical[X_AXIS], logical[Y_AXIS]);
-        const float z_virtual  = z_physical - ubl.state.z_offset - z_ublmesh;
+        const float z_physical = RAW_Z_POSITION(logical[Z_AXIS]),
+                    z_correct = ubl.get_z_correction(logical[X_AXIS], logical[Y_AXIS]),
+                    z_virtual = z_physical - ubl.state.z_offset - z_correct;
               float z_logical = LOGICAL_Z_POSITION(z_virtual);
 
         #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
@@ -614,10 +614,10 @@ void Planner::check_axes_activity() {
           //    so L=(P-O-M)/(1-M/H) for L<H
 
           if (planner.z_fade_height) {
-            if (z_logical < planner.z_fade_height )
-              z_logical = z_logical / (1.0 - (z_ublmesh * planner.inverse_z_fade_height));
             if (z_logical >= planner.z_fade_height)
               z_logical = LOGICAL_Z_POSITION(z_physical - ubl.state.z_offset);
+            else
+              z_logical /= 1.0 - z_correct * planner.inverse_z_fade_height;
           }
 
         #endif // ENABLE_LEVELING_FADE_HEIGHT

Marlin/ultralcd.cpp

@@ -1019,7 +1019,7 @@ void kill_screen(const char* lcd_msg) {
   #if ENABLED(AUTO_BED_LEVELING_UBL)
 
     float mesh_edit_value, mesh_edit_accumulator; // We round mesh_edit_value to 2.5 decimal places. So we keep a
-                                                  // seperate value that doesn't lose precision.
+                                                  // separate value that doesn't lose precision.
     static int ubl_encoderPosition = 0;
 
     static void _lcd_mesh_fine_tune(const char* msg) {