Added experimental _MMU_POST_UNLOAD macro hook for filament cutter at…

… ERCF

TODO

@@ -67,3 +67,6 @@ It didn't. It just stop the print. Although T2 and T9 are mapped together for ES
 
 25. Gate calibration - throw away the first measure unless the gate is buffered for more accurate results
 
+26. selector calibration - need way to calibrate bypass "gate"
+
+27. Make servo movement integration faster with option to pass printtime() to servo move so time is not currenttime to avoid toolhead.wait()

extras/mmu.py

@@ -2072,7 +2072,6 @@ def _on_print_start(self):
             else:
                 msg += " (no filament loaded)"
             self._log_info(msg)
-            self.toolhead.wait_moves()
             self._set_print_state("printing")
 
     def _mmu_pause(self, reason, force_in_print=False):
@@ -4068,7 +4067,12 @@ def _change_tool(self, tool, in_print, skip_tip=True):
         if not skip_unload:
             self._unload_tool(skip_tip=skip_tip)
 
+        if in_print:
+            gcode = self.printer.lookup_object('gcode_macro _MMU_POST_UNLOAD', None)
+            if gcode is not None:
+                self._wrap_gcode_command("_MMU_POST_UNLOAD", exception=True)
         self._select_and_load_tool(tool)
+
         self._track_swap_completed()
 
         if in_print: