在石棉水泥单板生产线上,料坯的扯坯一般采用圈数计数方式。国内常用两种方法:一种方法是用机械齿轮装置,对料坯圈数进行计数。该方法在生产过程中不能随机改变自动扯坯的圈数,也不能显示出具体累计圈数,所以使用不方便。另一种方法是武汉院设计的继电控制计数电路,虽能解决上述问题,但由于这种电路采用了大量的小型继电 In the asbestos cement veneer production line, the billet blank is generally counted by turns. There are two commonly used methods in China: One method is to use a mechanical gear device to count the number of turns of the blank. This method cannot randomly change the number of turns of the automatic pull blank in the production process, nor can it show the specific cumulative number of turns, so it is inconvenient to use. Another method is the relay control counting circuit designed by the Wuhan Institute. Although it can solve the above problems, it uses a large number of small relays.