Knowledge

The design of the looper thread take-up cam is different from the factory, and some of the size and shape may be different from the actual need. If th

The principle to be followed when adjusting the front and rear needle guards is: the contour line of the front and rear needle guards from the directi

In addition to the left and right movements of the curved needle, there are also front (toward the operator) and back (away from the operator) movemen

Cause: The upper thread is used up; the presser foot is not lowered; the bobbin thread shaft is not in the correct position. Solution: Replace the emp

Sewing machine needles are divided into metric system and gauge system (American system) according to industry regulations. Whether it is metric or ga

1. Turn over the sewing machine. There are three cross bars above the bottom of the sewing machine. The bottom one is for the front and back movement

The 845 double-needle machine has a wide range of applications, mainly for sewing shirts, uniforms, overcoats, women's underwear, jackets, jeans,

In the process of using the sewing machine, the uniformity of the feeding dog is a very important link. No matter what brand of sewing machine, the fe

Adjustment method: the needle bar is lowered to the lowest point, the shuttle tip is 3.5-4mm away from the needle, when the needle bar rises 2.2mm, th

One is that the hook itself is less oily, and the other is that the clearance fit between the hook guides is too tight The third is the roughness of t

1. The machine is not flexible enough, it should be better with some oil. 2. The thread may be too thin, or the shuttle may be dirty. 3. The machine i

1. If it is a computerized sewing machine; it should be that there is dust in the internal sensor of the front pulley of the sewing machine. The solut