在自动化或半自动化机床设备中,经常需要控制多个执行元件(如电机、电磁铁等)分别在不同时刻按一定规律周期工作,或说按一定时间顺序使多个执行元件周期工作。用时序开关系统可以很容易地实现这个目的。而且控制条件愈多,被控执行元件愈多,使用时序开关系统的优越性将愈明显。 In automatic or semi-automatic machine tools, often need to control multiple actuators (such as motors, electromagnets, etc.) at different times, respectively, according to a certain regular cycle of work, or by a certain time sequence so that more than one actuator cycle work. This can easily be done with a timing switch system. And the more control conditions, accused of the implementation of more components, the superiority of the use of timing switch system will be more obvious.