Digital accurate follow-up control method of rapier loom electric twisted edge

Abstract

The invention relates to a digital accurate tracking control method for electronic leno-selvage work of a rapier loom. The method comprises the following steps: signals from a coder driven by a main shaft of the loom are inputted to a leno-selvage controller to lead the leno-selvage controller to obtain the timely an angle signal of the loom shaft, and the leno-selvage controller sends out signals according to the actual angle of the loom shaft to control an actuating mechanism of the electronic leno-selvage to complete leno-selvage work. The digital delicate tracking control method enhances the control accuracy of leno-selvage, realizes the synchronization between the leno-selvage work and the loom shaft during either quick weaving or slow weaving and avoids the condition that the warp of leno-selvage is cut by rapier head or the abb cannot be locked normally.

Description

technical field [0001] The invention relates to a digitalized precision follow-up control method for electronic hemming of a rapier loom, and belongs to the technical field of textile machinery control. Background technique [0002] At present, most of the rapier looms on the market are mechanical hemming, and some manufacturers are trying electronic hemming. The so-called electronic hemming is to control the hemming mechanism through digital hemming motors such as stepping motors or servo motors. However, there are defects in the control of the existing electronic hemming. The movement time and stop time of the hemming are controlled according to the proximity switch signal. It is completed instantaneously instead of following the angle of the main shaft of the loom. When jogging at a slow speed, the hemming mechanism suddenly moves instantaneously. Generally speaking, this time is tens of milliseconds. The main shaft of the loom may only move a few degrees, but the hemmi...

AI Technical Summary

Problems solved by technology

However, there are defects in the control of the existing electronic hemming. The movement time and stop time of the hemming are controlled according to the proximity switch signal. It is completed instantaneously, instead of following the angle of the main shaft of the loom

When jogging at a slow speed, the hemming mechanism suddenly moves instantaneously. Generally speaking, this time is tens of milliseconds. The main shaft of the loom may only move a few degrees, but the hemming of the loom turns the hemming within one circle. The actions are completed instantaneously in advance, which will cause the levitation yarn to not move according to the weaving process requirements. For example, if the lenge is closed when it should not be closed, the leash warp will be cut by the sword head or the weft yarn cannot be locked normally, resulting in inferior cloth. or bad cloth

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