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How to repair sewing machine bottom line

The maintenance method of sewing machine bottom thread throwing is as follows:

1. Adjust the winding amount: if the winding amount is too small, it can be increased, and if it is too large, it can be reduced.

2. Inspection and cleaning of components: Check whether there are problems with components such as shuttle bed, shuttle core and winding machine, and if there are problems, clean or replace them.

3. Adjust the hook position of the hook: If the hook position of the hook is incorrect, you can adjust the hook position of the hook to make it in the correct position. Personally, I suggest consulting professional sewing machine maintenance personnel.