diff --git a/DM/DM_Motor_controller.py b/DM/DM_Motor_controller.py
index 8662570..0d86109 100644
--- a/DM/DM_Motor_controller.py
+++ b/DM/DM_Motor_controller.py
@@ -254,3 +254,6 @@ if __name__ == '__main__':
     move_to_ori_position()
     time.sleep(5)      # 电机运动需要的时间
     
+    while(True):
+        time.sleep(1)
+    
diff --git a/RK1106/stepper_motor.py b/RK1106/stepper_motor.py
index 6c040f8..cfc1025 100644
--- a/RK1106/stepper_motor.py
+++ b/RK1106/stepper_motor.py
@@ -213,4 +213,13 @@ def cleanup():
 if __name__ == '__main__':
     align_wire(speed=2500, cycle=10.0)
     time.sleep(10)      # 电机运动需要的时间
+    
+    # 测试是否电机能停止
+    motor_start(speed=2500, cycle=5.0, direction=0)
+    time.sleep(1)      # 电机运动需要的时间
+    motor_stop()   
+    time.sleep(0.2)
+    
+    while(True):     # 防止程序退出
+        time.sleep(1)
 
diff --git a/conveyor_controller/conveyor_motor.py b/conveyor_controller/conveyor_motor.py
index 9e522bb..b0517c5 100644
--- a/conveyor_controller/conveyor_motor.py
+++ b/conveyor_controller/conveyor_motor.py
@@ -390,3 +390,7 @@ if __name__ == '__main__':
     time.sleep(1)
 
     sync_motor_move(False)
+    time.sleep(0.5)
+    
+    while(True):
+        time.sleep(1)
diff --git a/servo/servo_control.py b/servo/servo_control.py
index 356a2c3..42e114c 100644
--- a/servo/servo_control.py
+++ b/servo/servo_control.py
@@ -145,3 +145,7 @@ if __name__ == '__main__':
     time.sleep(1)
     move_to_ori_position()      # 旋转0度
     time.sleep(1)
+    
+    while(True):
+        time.sleep(1)
+