How to thread the electric sewing machine thread? Although the use of sewing machines is much less than before, some craft enthusiasts will still buy an electric sewing machine at home, which is convenient for repairing clothes or weaving some handicrafts by themselves. However, when some people use electric sewing machines, they don’t know how to thread them once they run out, which brings a little trouble to their normal use. Let me introduce to you how to thread the sewing machine. I hope to help you.

The zigzag stitch sewing machine uses one or two needle threads and a shuttle thread to form a straight line or a curved line. It can sew two or more layers of sewing materials, or sew decorative stitches on one or more layers of sewing materials. It has multiple functions, so it is also called a multifunctional sewing machine.

The zigzag stitch sewing machine not only has all the functions of a straight stitch sewing machine, but also can sew decorative zigzag seams, pattern seams, hemming seams, patch seams, buttons, button holes, etc. It can also be used with special accessories. Double stitch stitching, blind stitching, caulking stitching, etc. It is not only suitable for sewing cotton, linen, silk, wool, chemical fiber and other non-elastic fabrics, but also can sew elastic knitted clothing.

The zigzag stitch sewing machine is formed by adding a mechanism to the straight stitch sewing machine. When sewing zigzag stitches, a pattern generator controls the trajectory of the stitches in the horizontal direction. The pattern generator is divided into mechanical type and microcomputer type. The mechanical pattern generator uses the lifting distance of the pattern cam to push the needle bar system to swing laterally and control the feeding system. The microcomputer pattern generator uses the pre-stored pattern program to control the needle bar system and the feeding system according to the selected pattern program through a stepping motor to sew various patterns of different shapes.

There are 5 types of zigzag stitch sewing machines: semi-multifunctional, full-multifunctional, semi-automatic multi-functional, automatic multi-functional and super automatic multi-functional.

Semi-multifunctional sewing machine: On the basis of completing the functions of ordinary sewing machines, a pattern generator (needle bar swing mechanism) is added to control the needle swinging from side to side. Through manual lever operation, regular zigzag decorative seams, zigzag elastic seams and hemming seams can be sewn.

Multifunctional sewing machine: On the basis of completing the functions of the semi-multifunctional sewing machine, a set of left, middle and right needle bar displacement mechanisms has been added to expand the scope of application. Through manual lever operation, it is possible to sew regular zigzag-shaped decorative seams with left, center, and right as the base point, sewing buttons, sewing button holes, etc.

Semi-automatic multi-function sewing machine: on the basis of completing the function of the semi-multi-function sewing machine, a set of mechanisms to control the swing of the needle bar is added, so that the needle can automatically change the width of the horizontal needle as required, thereby automatically sewing regular zigzag decorative seams .

Full-automatic multi-function sewing machine: On the basis of completing the functions of the multi-function sewing machine, the control needle bar swing, the needle bar left, middle and right displacement, the length of the feed and the reverse direction mechanism are respectively added. It can automatically sew regular zigzag-shaped decorative seams, pattern-shaped decorative seams, and sewing buttonholes.

Super automatic multi-function sewing machine: On the basis of completing the function of the fully automatic multi-function sewing machine, a group of mechanisms to control the horizontal change of sewing materials is added, which expands the width of the horizontal needle and makes the pattern-shaped decorative seams more beautiful.