Treatment method that cannot come under the presser foot

Update:29-11-2019
Summary:

The main reasons for the failure of the presser foot ar […]

The main reasons for the failure of the presser foot are the following. As long as the control is performed, the problem can be solved.
1. The line is broken;
2. Electromagnet failure;
3. The position of the slider changes or is damaged.
4, the needle bar positioning iron is too high;
5. The corresponding computer control board is damaged.

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