In the process of using sewing machines to sew clothing, sometimes the clothing material moves at an uneven speed and the stitch length is short and irregular. The clothing is moved forward by the cooperation of the feeding teeth and the presser foot. Therefore, when the clothing exhibits the above-mentioned irregular movement, it can be concluded that the teeth and presser foot are malfunctioning or the pressure is improperly adjusted. For example, the presser foot pressure is too small. If the fabric is not pressed tightly, it will cause irregular movement.
At this time, just turn the pressure regulating screw down to compress the clothes. If the presser foot is too high to hold the clothing material, it will also cause the clothing material to move randomly or not at all. When adjusting, first raise the presser foot wrench, loosen the guide frame screw, and then move the presser foot bar from top to bottom to make After adjusting the distance between the presser foot and the needle plate to a height of 7-8 mm, tighten the screws immediately before driving.
Another reason is that the tooth screws are loose, causing the teeth to sway from side to side during operation, so that the cloth cannot move forward regularly. The treatment method is to remove the needle plate. Tighten the two teeth screws. After tightening, install the needle plate and check whether one of the teeth is rubbing against the edge of the needle plate groove.
If there is friction, it will cause noise and machine weight. At this time, only remove the needle plate, loosen the tooth screw, adjust the position of the tooth to the middle of the needle plate groove, tighten the tooth screw, and then install the needle plate.
