From 361655828f627896ee2fee42f996294da88574d6 Mon Sep 17 00:00:00 2001
From: Thomas Moore <tcm0116@gmail.com>
Date: Sun, 12 Feb 2017 17:20:24 -0600
Subject: [PATCH] Use babystepping to adjust bed probe z-offset

---
 Marlin/Marlin_main.cpp |  5 +++++
 Marlin/ultralcd.cpp    | 45 +++++++++++++++++++++++++++++++++++++-----
 2 files changed, 45 insertions(+), 5 deletions(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 0ad7e3656..337c7f787 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -7991,6 +7991,11 @@ inline void gcode_M503() {
           #endif
         #endif
 
+        #if ENABLED(BABYSTEPPING)
+          if (planner.abl_enabled)
+            thermalManager.babystep_axis(Z_AXIS, lround((value - zprobe_zoffset) * planner.axis_steps_per_mm[Z_AXIS]));
+        #endif
+
         zprobe_zoffset = value;
         SERIAL_ECHO(zprobe_zoffset);
       }
diff --git a/Marlin/ultralcd.cpp b/Marlin/ultralcd.cpp
index 19dbc233d..908891039 100755
--- a/Marlin/ultralcd.cpp
+++ b/Marlin/ultralcd.cpp
@@ -834,7 +834,7 @@ void kill_screen(const char* lcd_msg) {
       if (lcd_clicked) { defer_return_to_status = false; return lcd_goto_previous_menu(); }
       ENCODER_DIRECTION_NORMAL();
       if (encoderPosition) {
-        int babystep_increment = (int32_t)encoderPosition * (BABYSTEP_MULTIPLICATOR);
+        const int babystep_increment = (int32_t)encoderPosition * (BABYSTEP_MULTIPLICATOR);
         encoderPosition = 0;
         lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
         thermalManager.babystep_axis(axis, babystep_increment);
@@ -850,8 +850,37 @@ void kill_screen(const char* lcd_msg) {
       void lcd_babystep_x() { lcd_goto_screen(_lcd_babystep_x); babysteps_done = 0; defer_return_to_status = true; }
       void lcd_babystep_y() { lcd_goto_screen(_lcd_babystep_y); babysteps_done = 0; defer_return_to_status = true; }
     #endif
-    void _lcd_babystep_z() { _lcd_babystep(Z_AXIS, PSTR(MSG_BABYSTEPPING_Z)); }
-    void lcd_babystep_z() { lcd_goto_screen(_lcd_babystep_z); babysteps_done = 0; defer_return_to_status = true; }
+
+    #if HAS_BED_PROBE
+
+      void lcd_babystep_zoffset() {
+        if (lcd_clicked) { defer_return_to_status = false; return lcd_goto_previous_menu(); }
+        defer_return_to_status = true;
+        ENCODER_DIRECTION_NORMAL();
+        if (encoderPosition) {
+          const int babystep_increment = (int32_t)encoderPosition * (BABYSTEP_MULTIPLICATOR);
+          encoderPosition = 0;
+
+          const float new_zoffset = zprobe_zoffset + steps_to_mm[Z_AXIS] * babystep_increment;
+          if (WITHIN(new_zoffset, Z_PROBE_OFFSET_RANGE_MIN, Z_PROBE_OFFSET_RANGE_MAX)) {
+            
+            if (planner.abl_enabled)
+              thermalManager.babystep_axis(Z_AXIS, babystep_increment);
+      
+            zprobe_zoffset = new_zoffset;
+            lcdDrawUpdate = LCDVIEW_REDRAW_NOW;
+          }
+        }
+        if (lcdDrawUpdate)
+          lcd_implementation_drawedit(PSTR(MSG_ZPROBE_ZOFFSET), ftostr43sign(zprobe_zoffset));
+      }
+
+    #else // !HAS_BED_PROBE
+
+      void _lcd_babystep_z() { _lcd_babystep(Z_AXIS, PSTR(MSG_BABYSTEPPING_Z)); }
+      void lcd_babystep_z() { lcd_goto_screen(_lcd_babystep_z); babysteps_done = 0; defer_return_to_status = true; }
+
+    #endif // HAS_BED_PROBE
 
   #endif //BABYSTEPPING
 
@@ -1057,7 +1086,9 @@ void kill_screen(const char* lcd_msg) {
         MENU_ITEM(submenu, MSG_BABYSTEP_X, lcd_babystep_x);
         MENU_ITEM(submenu, MSG_BABYSTEP_Y, lcd_babystep_y);
       #endif //BABYSTEP_XY
-      MENU_ITEM(submenu, MSG_BABYSTEP_Z, lcd_babystep_z);
+      #if !HAS_BED_PROBE
+        MENU_ITEM(submenu, MSG_BABYSTEP_Z, lcd_babystep_z);
+      #endif
     #endif
 
     //
@@ -2378,7 +2409,11 @@ void kill_screen(const char* lcd_msg) {
     START_MENU();
     MENU_BACK(MSG_CONTROL);
     #if HAS_BED_PROBE
-      MENU_ITEM_EDIT(float32, MSG_ZPROBE_ZOFFSET, &zprobe_zoffset, Z_PROBE_OFFSET_RANGE_MIN, Z_PROBE_OFFSET_RANGE_MAX);
+      #if ENABLED(BABYSTEPPING)
+        MENU_ITEM(submenu, MSG_ZPROBE_ZOFFSET, lcd_babystep_zoffset);
+      #else
+        MENU_ITEM_EDIT(float32, MSG_ZPROBE_ZOFFSET, &zprobe_zoffset, Z_PROBE_OFFSET_RANGE_MIN, Z_PROBE_OFFSET_RANGE_MAX);
+      #endif
     #endif
     // Manual bed leveling, Bed Z:
     #if ENABLED(MESH_BED_LEVELING) && ENABLED(LCD_BED_LEVELING)