Yarn guide motion control system and method for a fully automatic computerized flat knitting machine

Abstract

The invention discloses a system and a method for controlling the motion of a yarn guide of a full-automatic computerized flat knitting machine. The system comprises an upper computer module, a human-computer interaction module, a control module, a power module and a servo motor. The upper computer module sends a message of the position which the yarn guide is going to arrive at to the control module; the control module calculates a variable value of the position of the yarn guide and a variable quantity of a coded signal corresponding to the variable value, and then outputs a PWM signal; the power module converts the PWM signal into a UVW three-phase signal and controls the servo motor to rotate; the servo motor drives a mechanical transmission device to move the yarn guide; meanwhile, a motor encoder continuously feeds back the coded signal to the control module; when the variable value of the coded signal received by the control module reaches a set value, the yarn guide arrives at the position which the yarn guide is going to arrive at; the control module stops sending the PWM signal, the servo motor is locked at the moment, and the yarn guide stops motion at the same time. The system and method for controlling the motion of the yarn guide of the full-automatic computerized flat knitting machine have the advantages of being capable of controlling the motion of the yarn guide in real time and quickly responding to the motion of the yarn guide.

Description

technical field [0001] The invention relates to the technical field of fully automatic computerized flat knitting machines, in particular to a motion control system and method for a yarn guide of a fully automatic computerized flat knitting machine. Background technique [0002] The traditional yarn carrier motion control system is realized by the cooperation of the yarn carrier electromagnet and the machine head. The yarn carrier is installed on the yarn carrier guide rail, and the yarn carrier electromagnet is installed on the machine head. When the machine head moves to the yarn guide Open the yarn feeder electromagnet when it is in the position, so as to drive the yarn guide to move. When the yarn guide reaches the predetermined position, only need to close the yarn feeder electromagnet to keep the yarn guide in this position. Therefore, the position of the yarn guide of this yarn guide motion control system depends heavily on the movement of the machine head and the ope...

AI Technical Summary

Problems solved by technology

[0003] When the machine head is far away from the yarn guide, the position of the yarn guide cannot be changed. It is necessary to wait until the machine head moves to the parking position of the yarn guide before changing the position of the yarn guide. Without a good speed control, the yarn guide will still move inertially for a period of time after it is parked, thus deviating from the predetermined position

In addition, the performance of the yarn carrier electromagnet itself is not very stable, and it is often damaged or misoperated, resulting in inaccurate parking of the yarn guide

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