This design uses the PID control instruction in PLC controller to complete the PID algorithm, to realize the closed-loop speed regulation of the screw speed, to achieve the desired position. Using CCW programming software to write control program (ladder diagram), after running the control program on micro 850 controller, control the frequency converter, then control the speed of servo motor, and then control the positioning of screw rod. The high-speed pulse signal collected by the encoder is sent to the PLC high-speed counter module as the feedback variable of the PID algorithm, so as to realize the closed-loop speed regulation of the screw motion system. According to the characteristics of the screw motion control system, the parameter adjustment of the PID algorithm is completed.
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