Use a sewing machine to wrap a single or double layer. Thin fabric Sometimes, the material is not smooth or the fabric is seriously wrinkled.

When the feeding is not smooth, the first step should be to check whether the surface of the presser foot is seriously worn. If there are deeper grooves on the presser foot plate, it should be replaced in time. (the presser should be of good quality and poor quality products may be irregularities on the floor). Then check whether the tooth is worn or not. If there is wear, you can use the triangular file to sharpen the teeth, or use the thin spacing material to send the cloth teeth.

Main contractor feed dog And the height of the differential feeding tooth is adjusted to expose the needle plate 1mm, the presser foot pressure adjustment is moderate, and then observe whether the feeding tooth reaches the top dead point and whether it can fully contact with the presser foot baseplate. Once there is a decrease in the amount of wire or the rotation of the shuttle can cause the wire ring to form undesirable, it will cause the spindle to stop the thread loop and produce the 1~2 needle. When sewing on flat fabric, no needle jumping is needed. As long as the thick material is processed, there will be a jump needle on the uphill slope, a jump needle when downhill, and a large jump needle on the thick material. If there is a gap on one side, the presser should be adjusted to the level. After adjusting the presser foot, the position of the presser foot gauge should be adjusted, because the center of gravity of the presser is between the main feeding tooth and the differential feeding tooth. In order to strengthen the main tooth feeding ability, when the presser foot is in a horizontal position, the limit plate is adjusted to contact with the presser foot baseplate.

If Overlock machine When sewing, there is a serious wrinkle in the fabric. Besides adjusting the stitching tension and the width of the edge, it is necessary to adjust the height of the auxiliary feeding tooth. When checking, the shuttle has been firmly fastened to the lower axle. Only the gap between the two teeth of the gear is large, and the gear needs to be loosened. The gear is pushed up or down tightly (see if the gear is left or right). Because there is a type of taper on the teeth of the gear, it is only necessary to squeeze tightly, but it is not too tight. When the height of the main tooth is 1mm, the auxiliary feeding tooth should be 0.8mm. Then it is important to observe whether the main feeding tooth is below the needle plate after returning the cloth, which is one of the reasons for the wrinkle of the fabric.