Merge pull request #2393 from wavexx/sync_before_resume

Sync before resume

Firmware/Marlin_main.cpp

@@ -10318,12 +10318,10 @@ void restore_print_from_ram_and_continue(float e_move)
 
 	//first move print head in XY to the saved position:
 	plan_buffer_line(saved_pos[X_AXIS], saved_pos[Y_AXIS], current_position[Z_AXIS], saved_pos[E_AXIS] - e_move, homing_feedrate[Z_AXIS]/13, active_extruder);
-	st_synchronize();
 	//then move Z
 	plan_buffer_line(saved_pos[X_AXIS], saved_pos[Y_AXIS], saved_pos[Z_AXIS], saved_pos[E_AXIS] - e_move, homing_feedrate[Z_AXIS]/13, active_extruder);
-	st_synchronize();
 	//and finaly unretract (35mm/s)
-	plan_buffer_line(saved_pos[X_AXIS], saved_pos[Y_AXIS], saved_pos[Z_AXIS], saved_pos[E_AXIS], 35, active_extruder);
+	plan_buffer_line(saved_pos[X_AXIS], saved_pos[Y_AXIS], saved_pos[Z_AXIS], saved_pos[E_AXIS], FILAMENTCHANGE_RFEED, active_extruder);
 	st_synchronize();
 
   #ifdef FANCHECK

Firmware/mmu.cpp

@@ -1589,6 +1589,7 @@ void mmu_continue_loading(bool blocking)
             if (blocking)
             {
                 marlin_wait_for_click();
+                st_synchronize();
                 restore_print_from_ram_and_continue(0);
                 state = Ls::Retry;
             }

Firmware/ultralcd.cpp

@@ -6678,12 +6678,13 @@ static bool fan_error_selftest()
 void lcd_resume_print()
 {
     lcd_return_to_status();
-    lcd_reset_alert_level();
-    lcd_setstatuspgm(_T(MSG_RESUMING_PRINT));
     lcd_reset_alert_level(); //for fan speed error
-
     if (fan_error_selftest()) return; //abort if error persists
 
+    lcd_setstatuspgm(_T(MSG_FINISHING_MOVEMENTS));
+    st_synchronize();
+
+    lcd_setstatuspgm(_T(MSG_RESUMING_PRINT));
     isPrintPaused = false;
     restore_print_from_ram_and_continue(default_retraction);
     pause_time += (_millis() - start_pause_print); //accumulate time when print is paused for correct statistics calculation