There should be dust in the sensor inside the sewing machine head pulley. The solution is to loosen the pulley and take it out, and then clean the sensor and the inside of the pulley. If it is an ordinary sewing machine with a motor, the pulley fixing screw of the sewing machine at the head should slip. Another possibility is that the machine is stuck. Please check whether the shuttle is stuck at the end of the line and do some cleaning work.

The main rotating parts of sewing machine use precision bearings instead of traditional shaft sleeves, which has low noise and no vibration when working at high speed. Can be combined with hemming to form an automatic hemming sewing machine combination, or combined with an automatic bagging production line to be used as a full-automatic production line. It can be interchanged with most existing sewing machine heads in the market.