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737 overlock sewing machine jumper situation and solution
- Oct 29, 2018 -

Three-line overlock sewing machine jumpers generally have the following two situations:

1. The lower curved needle is not hooked to the thread, and the lower curved needle is not hooked to the needle thread loop. Solution: adjust the relative position of the needle and the lower looper so that the lower looper can be inserted into the needle thread loop;

2. The lower looper hook does not reach the upper looper loop, which is the loop of the upper looper without the upper and lower looper. Solution: adjust the position of the upper looper so that the upper looper can hang the loop of the looper;

3. The needle is not inserted into the loop that the upper looper sends, and the relative position of the upper looper and the needle is adjusted.

There are many reasons for the jumper. You also need to check whether the needle is bent, the direction is correct, and the fitting of each part is loose.

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