Knowledge

1. First use a flat-blade screwdriver to loosen the mask screw on the sewing machine. 2. Then remove the unscrewed screws and take off the mask of the

1. The height of the presser foot of the sewing machine can be adjusted freely, along the presser foot rod upwards, there is a nut at the top of the m

1. Free embroidery foot Use the spinning presser foot to perform free movement such as free darning, free embroidery, and free sewing. Sewing a padded

(1) Confirm whether the oil volume adjustment method is correct. Generally, the principle of the oil supply of the rotary hook is to adjust the size o

1. Open the mask, loosen the fixing screw on the needle bar connecting rod, add some oil to the needle bar, move up and down several times, tighten th

Plastic presser feet are generally used for sewing leather clothes, pu materials, and pvc materials. Since the iron presser foot may not be able to wa

Standard positioning of overlock sewing machine needle and upper and lower looper (1) The height positioning of the needle. When the needle rises to t

If the thread is too dense, just loosen the adjusting screw on the stitch length adjusting device downward and adjust one or two grids. Due to the dif

First check whether the thread is threaded incorrectly and whether the bobbin case is stuck properly. If these are all right, it means that the upper

The thread breaks in the sewing machine can be caused by the following situations. In the first case, the quality of the thread is not good. We genera

1. Cleaning the feed dog: remove the screw between the needle plate and the feed dog, remove the cloth lint and dust, and add a small amount of sewing

Reasons for sewing machine jumper: 1. If the needle is bent or the needle is installed reversely, replace the needle with a new one or install the nee