说明：  加工中心面板检测程序。用步进电机移动机构按下相应按钮，检测加工中心面板的按键是否可以都正常工作，若有错误则报警。
(Check processing center panel. Stepper motor used by pressing the corresponding button on the mobile body detection processing center of the button panel can have a normal work, if mistakes are the police.)