diff --git a/action.py b/action.py
index 19c71b5..8b987dd 100644
--- a/action.py
+++ b/action.py
@@ -187,27 +187,40 @@ class cmd_cls():
 class axis_cls():
     def __init__(self) -> None:
         self.axis_queue = queue.Queue()
+        self.busy = False
         pass
     def axis_z(self, _distance, _time_via = -1):
+        while self.busy is True:
+            pass
         self.axis_queue.put(lambda: cmd.z(20, _distance, _time_via))
         pass
     def axis_z2(self, _position, _time_via = -1):
+        while self.busy is True:
+            pass
         self.axis_queue.put(lambda: cmd.z2(20, _position, _time_via))
         pass
     def axis_x(self, _distance, _time_via = -1):
+        while self.busy is True:
+            pass
         self.axis_queue.put(lambda: cmd.x(1, _distance, _time_via))
         pass
     def axis_x2(self, _position, _time_via = -1):
+        while self.busy is True:
+            pass
         self.axis_queue.put(lambda: cmd.x2(1, _position, _time_via))
         pass
     def pop(self):
+        self.busy = True
         while self.axis_queue.qsize() > 0:
             logger.info(f"axis cmd {self.axis_queue.qsize()}")
             self.axis_queue.get()()
             self.axis_queue.task_done()
             time.sleep(0.005)
+        self.busy = False
         pass
     def exec(self, _block:bool = True):
+        while self.busy is True:
+            pass
         if _block is True:
             self.pop()
         else: