A method for controlling and adjusting stitch distance on a sewing machine

Abstract

The invention provides a method for controlling and adjusting the stitch distance on a sewing machine, which belongs to the technical field of garment manufacturing equipment. It solves the technical problems such as the inaccurate adjustment of the stitch distance of the existing sewing machine. The sewing machine includes a casing, a feed dog, a drive motor arranged on the casing, and a rotatable stitch length adjustment shaft. A swing rod is fixed on the output shaft of the drive motor, and a swing crank is fixedly connected to the end of the stitch length adjustment shaft. , the swing rod is connected with one end of the swing crank through the swing connecting rod, a needle distance scale plate with scale value is fixed on the casing, and the other end of the swing crank corresponds to the scale value on the needle distance scale plate. The control and adjustment method in the present invention can easily realize the adjustment of the stitch distance and the front and rear dense seams of the sewing machine, and at the same time realize some simple pattern seams through the electric 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

Images