Thick thread thick material sewing machine is a kind of thickening sewing machine of sewing machine. Two point machine and three point machine are commonly used, which greatly improves the equipment activity rate.

The thick thread and thick material sewing machine is composed of a machine head, a machine base, a transmission and accessories. The head is the main part of the thick material machine. It is composed of four mechanisms including stabbing, hooking, thread take-up and feeding, as well as auxiliary mechanisms such as wire winding, material pressing and tooth dropping. The movement of each mechanism is reasonably coordinated and works circularly to sew the sewing materials.

The sewing machine will produce mechanical fatigue after long-term use, and the coordination of various parts is not as good as before, and some minor faults will occur. If the sewing material is wrinkled, it is because the needle is broken, the lower thread tension is too large, and the differential mechanism is improperly adjusted. At this time, we should replace the new needle, loosen the bobbin spring screw, and readjust the differential mechanism. The reason why the lower part of the sewing material is "gnawed" to form a grid mark is that the feeding teeth are too sharp and the presser foot pressure is too high. We can use oilstone to grind the tooth tip of cloth feeding and loosen the pressure adjusting screw of presser foot. There is wire wool under the sewing material, and there is a sound of breaking the fiber during sewing, because the needle is broken or too blunt. Resolutely replace the new needle.