Control system for rotary screen printing machines

Abstract

The invention discloses a control system for rotary screen printing machines, which comprises a main controller, an electrical control module, a rotary-screen synchronous control module and a multi-path screen head control unit, wherein the main controller is the core of the whole control system, and used for coordinating the operations of the electrical control module, the rotary-screen synchronous control module and the screen head control unit, receiving and processing data sent from each module, and realizing the mutual cooperation and coordination of the modules, therefore, the main controller is the 'brain' and 'nerve center' of the control system of a whole printing machine. The control system disclosed by the invention adopts a dual-bus structure, therefore, the stability and response speed of system control of the rotary screen printing machine are improved. By using the control system disclosed by the invention, the problem of retaining the precise synchronization performance and efficient automatic registering performance of the ascending and descending speeds of the rotary screen printing machine in the processes of printing and dyeing can be solved, the accidents of fabric breaking, network disconnection, and 'pattern error' can be completely eradicated, and the production efficiency and product quality of equipment can be improved.

Description

technical field [0001] The present invention mainly relates to conventional printing equipment for textiles, and in particular to a control system for a rotary screen printing machine. Background technique [0002] The rotary screen printing machine is composed of a cloth feeding unit, a printing unit, a drying room unit and a cloth outlet unit. The cloth feeding unit transports the white gray cloth to be printed and dyed into the machine, and performs pretreatment. The printing unit is the core mechanism of the rotary screen printing machine, which prints various colored pastes on the gray cloth through the rotary screen engraved with patterns. Its working principle is that the guide belt drives the cloth to move, and the rotary screen keeps rotating synchronously with the cloth. When the rotary screen is in contact with the cloth, the slurry is printed and dyed on the cloth according to the pattern, and each rotary screen prints a color. The drying room unit is used to q...

AI Technical Summary

Problems solved by technology

[0009] 1. On-site wiring is complicated, and there are many types and quantities of cables

[0010] 2. The control period of the PLC is too long, the response to the synchronous signal is slow, and the synchronization of the network head is not good, especially in the process of speed up and down, it is easy to run out, resulting in a high scrap rate during the speed up and down process

[0011] 3. The control system is an open-loop control for the mesh head motor, which cannot eliminate the comprehensive error caused by the motor (AC motor, stepper motor, servo motor) or motor driver (inverter, stepper motor driver, servo motor driver, etc.)

[0012] 4. Because the communication connection between the network head operation panel and the PLC master controller is too simple, the function of the network head operation panel is relatively simple, and it is impossible to realize the complicated process operation, and there is no control interchangeability

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