The program design plan is to manually input an angle value,let the motor rotate,and detect the rotation angle of the motor through the photoelectric code disc connected to the motor,and turn the rotation angle into a pulse signal.Because the speed of the motor is very fast,only the pulse signal can be sent to the high-speed counter of the PLC.Then compare the pulse record of the counter with the hand input,if the two are equal,the motor has reached the specified angle position,otherwise continue to correct.It is worth noting that since the motor will have a certain inertia from the sudden change of rotation to the stop,a certain error should be allowed when comparing the signals,otherwise the motor will always be in a state of correction.
程序设计方案为手动输入一个角度值,让电机转动,通过与电动机相联的光电码盘来检测电动机转的角度,将转动角度变成脉冲信号。由于电动机的转速非常快,所以只能把脉冲信号送往PLC的高速计数器。然后将计数器的脉冲记录与手输入的进行比较,如果两者相等说明电动机已经到达指定角度位置,否则继续进行修正。值得注意的是,由于电动机从转动突变到停止会有一定的惯性,因此在进行信号比较时应允许有一定的误差,不然电动机就会始终处在修正位置状态。
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