此脉冲信号还是行计数器的触发信号，间接地控制振镜场扫的正程和逆程。

The horizontal line's counter is also activated by this signal to control galvanometer up and down.

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采用PLC的高速计数器进行测量轮正转和反转时的脉冲信号的采集，通过进一步程序运算得到绝对位移量。

The pluses comes from coder to send to the high speed counter, and the number of the high speed counter is operated in the program of PLC to get the absolute displacement anticipated.

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并且，根据正转脉冲信号的计数值算出 卷绕到卷装（30）上的纱线长度。

Then, based on the count value in the forward rotation pulse signal, the length of the yarn wound into the package 30 is calculated.

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