【摘要】 本文介绍一种用PLC软件控制电动机制动达到准确定位的方法，并较详细地说明如何将这种方法用于丝网印刷机停机位置的控制中。文中对设计方案及其工作原理都做了详尽的阐述，关键之处配以框图说明。更多还原

【Abstract】 In order to stop a mechanism exactly,we present a simple and cheap control method. By means of PLC and inverters a mechanism with different speed can be stopped exactly. Besides, according to the control experience the parameter of stopping machine can also be changed. The design and flow chart of the system are explained in detail.更多还原