The occurrence of pull and loop is mainly influenced by the quality of sewing needles, density of fabric, density of twist, density and material of cloth.

The main reason is the pulling and winding problems caused by sewing needles.

Too curved, too thick and when sewing, sewing needles penetrate cloth without resistance.

The way to solve these problems is to replace new needles, use fine needles as much as possible, use needles as circular needles, and use needles with sharp needles.

Due to the operation of sewing machines, the problem of drawing and winding is mainly due to the fact that

The rotating speed is too fast, the caliber of the needle plate is too large, the tension of the wire is too large, and the clearance of sewing is too dense.

The way to solve this problem is to minimize the full speed of rotation, use smaller caliber points, reduce the tension of the line and relax the sewing interval.

If it is the problem of wire drawing and return line caused by the condition of the line, use it as far as possible.

And apply silicone oil on line.

The problem of drawing and winding due to the condition of cloth is mainly due to the low flexibility of the cloth and

The tissue density is not balanced.

The solution is to use substrates or tapes to prevent the movement of lines, and to use fabric hardener.