A sewing machine stem passing deceleration device and control method

Abstract

The invention provides a sewing machine deceleration device, which comprises an electric control module of the sewing machine, a main motor for driving the sewing machine, a presser foot seat, and a presser foot plate. One end of the presser foot plate is the feeding end, and the presser foot plate is hinged to the The lower end has a fixed swing fulcrum, and also includes a compression spring and a pressure sensor fixed on the presser foot plate. The upper and lower ends of the compression spring are respectively in contact with the presser foot seat and the pressure sensor, and the main motor and the pressure sensor are connected to the electronic control module; Along the forward feeding direction of the sewing machine, the pressure sensor, the fixed swing fulcrum of the presser foot plate, and the feed end of the presser foot plate are arranged in sequence from front to back. During the sewing process, the electronic control module can judge in real time whether the sewing has crossed the steps through the output signal of the pressure sensor. When the sewing has passed the steps, the electric control module immediately controls the sewing machine to reduce the speed for sewing, so the speed reduction in this application is timely and there is no speed reduction lag. Phenomenon, can effectively avoid thread breakage, needle breakage, etc., and ultimately ensure the quality of sewing.

Description

technical field [0001] The invention relates to a sewing machine stem passing deceleration device. [0002] The present invention also relates to a method for controlling the stem passing deceleration of the sewing machine comprising the above sewing machine stem passing decelerating device. Background technique [0003] In the process of sewing fabric, the sewing machine will sew over the steps when the thickness of the fabric becomes thicker. At this time, it is necessary to reduce the sewing speed of the sewing machine, that is, slow down when passing through the stem. At present, the speed reduction is mainly controlled by workers, or a detection device for detecting the thickness of the fabric is installed in the sewing machine, and the electronic control module of the sewing machine controls the speed reduction of the sewing machine according to the thickness of the cloth fed back by the detection device. However, there is a problem of lagging in speed reduction in th...

AI Technical Summary

Problems solved by technology

However, the existing deceleration devices for crossing stems all have the problem of deceleration lag, which leads to thread breakage or even needle breakage, which is not conducive to the improvement of sewing quality.

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