Abstract
According to the requirements of large-stroke and high-precision positioning control in industrial production, the paper proposes a position closed-loop control system based on belt-type magnetic scale and PLC. The Siemens S7-200 PLC is used to capture the high-speed pulses of the magnetic scale in real time, realize the closed- loop automatic positioning control of the large-stroke position, and apply it to the plastic steel profile sawing centre control system, which solves the traditional stepper motor open loop at a lower cost The accuracy problems caused by the control greatly reduce the threshold of precise positioning control, which has strong practical application value.
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