Control and regulation method of stitch length for sewing machinery

Abstract

The invention provides a control and regulation method of stitch length for sewing machinery, belongs to the technical field of clothing manufacturing equipment and solves the technical problems that,for instance, stitch length regulation for existing sewing machinery has poor precision. A sewing machine comprises a housing, a feed dog, a driving motor arranged on the housing and a stitch lengthadjusting shaft which is rotatable. A rocking rod is fixed to an output shaft of the driving motor; the end of the stitch length adjusting shaft is fixedly connected with a rocking crank; the rockingrod is connected with one end of the rocking crank through a rocking connection rod; a stitch length graduated plate having graduation is fixed to the housing; the other end of the rocking crank corresponds to the graduation of the stitch length graduated plate. The control and regulation method herein allows stitch length to be regulated easily and front and rear thicker sewing to be performed via the screwing machine, and allows some simple pattern sewing to be achieved through an electronic control system.

Description

technical field [0001] The invention belongs to the technical field of garment manufacturing equipment, and relates to a method for controlling and adjusting stitch distance on 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. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. At present, when the sewing machines on the market are finished sewing, because the needle pitch cannot be adjusted, the thread ends of the bottom thread and the upper thread cannot form effective self-locking, and they are easy to fall off when pulled, and when the thread is trimmed after sewing, the thread ends left on the sewing material will be broken. One long and one short will affect the aesthetics of the stitches. For exa...

AI Technical Summary

Problems solved by technology

[0004] In the above patent documents, electromagnets are used to drive and adjust the dense seam device, but the action of the electromagnet is not easy to control, the number of encrypted stitches cannot be accurately controlled and changed, and it is difficult for users to observe and adjust, and the operation is not convenient enough

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