PLC control system and method for paper collection

Abstract

The invention discloses a PLC control system and method for collecting paper. The system comprises a PLC, a photoelectric encoder, a photoelectric sensor, an intermediate relay, an electromagnetic valve, an AC contactor and a frequency converter. The PLC is used for automated control, configuration and data operation of the system; the photoelectric encoder is connected with an input point of thePLC and used for judging the position state of the paper by generating a pulse signal equivalent to the displacement increment in order to match a control function with the paper; the photoelectric sensor is connected with the input point of the PLC and used for detecting the state of the paper; the intermediate relay is connected with an output point of the PLC and used for isolating the PLC fromthe electromagnetic valve so as to prevent the electromagnetic valve from short-circuiting and burning the output point of the PLC; the electromagnetic valve is connected with the intermediate relayand used for controlling the action of an air cylinder; the AC contactor is connected with the PLC and used for achieving remote control and providing a three-phase power supply for the frequency converter. The frequency converter is used for controlling a motor of a paper receiving device to achieve adjustment and matching of the running speed through communication with the PLC.

Description

technical field [0001] The invention belongs to the technical field of paper collection and unwinding, and in particular relates to a PLC control system and method for paper collection. Background technique [0002] At present, after the paper is cut, all laminating machines, cross-cutting machines and other equipment need to pack the successfully cut single sheets neatly, and discharge the continuous sheets that have not been successfully cut. [0003] Paper can be divided into thickness and thickness. During the high-speed paper collection process, the inertia of high-speed rushing out is likely to break the edge of the paper; while reducing the paper collection speed, continuous sheets may appear, and unqualified paper is easy to accumulate on the top of the paper stack. , affecting subsequent normal paper collection. [0004] The existing sheet delivery system adopts PLC timing control, which makes it impossible to make corrections with paper changes during the control ...

AI Technical Summary

Problems solved by technology

[0003] Paper can be divided into thickness and thickness. During the high-speed paper collection process, the inertia of high-speed rushing out is likely to break the edge of the paper; while reducing the paper collection speed, continuous sheets may appear, and unqualified paper is easy to accumulate on the top of the paper stack. , affecting subsequent collection of normal paper

[0004] The existing sheet delivery system adopts PLC timing control, which makes it impossible to make corrections with paper changes during the control process

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