How is it that there are always many coils at the bottom of the old electric sewing machine?

1. Does the sewing thread completely enter the thread clamping plate? In general machines, the thread clamping plate is very tight when the presser foot is put down, and it can only be relaxed when the presser foot is raised, so that the thread can easily enter the thread clamping plate;

2. If it does enter the wire clamping plate, check whether the wire clamping plate is too loose and tighten the nut clockwise;

3. Check whether there is garbage in the wire clamping plate that affects the pressure of the wire clamping plate;

4, check whether the spring jump torque is too small;