Backstitch control method, backstitch control system and sewing machine

Abstract

The invention discloses a backstitch control method, a backstitch control system and a sewing machine. The backstitch control method comprises the steps of S1, acquiring a first duration taken by a rocking plate seat moving at an initial acceleration from an initial position to a zero stitch length position, and carrying out a step S2; S2, judging whether the first duration is greater than a preset duration threshold; if yes, executing a step S3; S3, adjusting pull force of a backstitch electromagnet so that the rocking plate seat moves for a second duration at a reduced speed in the originaldirection, and carrying out a step S4, wherein the backstitch electromagnet is connected to the rocking plate seat; S4, controlling the rocking plate seat to continue to move to an endpoint position in the original direction, wherein an acceleration in the moving process is not greater than the initial acceleration. By monitoring the movement duration of the rocking plate seat, determining actualstitch length of the rocking plate seat and decelerating the rocking plate seat in halfway when the stitch length is great, the final speed at which the rocking plate seat moves to the endpoint position is less than that of the prior art, and less noise is produced.

Description

technical field [0001] The invention relates to the technical field of back stitching, in particular to a back stitching control method, a back stitching control system and a sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. Sewing machines are generally composed of four parts: feeding device, machine base, transmission and accessories. The movement of each mechanism is reasonably coordinated, and the cycle works to sew the sewing materials together. [0003] In the back stitching electromagnet structure of the existing lockstitch machine in the back stitching process, after the back stitching electromagnet is energized, the swing plate seat is pulled by the existing transmission mechanism to move from the positive stitch distance stop point to the negative stitch distance until the feed regulator and ...

AI Technical Summary

Problems solved by technology

However, when the final speed of the feed regulator moves to a negative stitch distance, the feed regulator collides violently with the dial stud, which will generate a louder noise, and the greater the impact speed, the louder the sound, especially in short stitches. In garment factories with many stitching processes, the noise of reverse stitching is particularly prominent

On the one hand, this will generate greater noise pollution, and on the other hand, due to greater collisions, it will have a negative impact on the life of some parts

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