FAQ et Diagnostic

The thread tension is incorrect.

There could be several reasons why the tension is incorrect.
Check the following points or issues.

The upper thread is not threaded correctly.
Check the thread path, and then thread the upper thread again.
For details, see "How do I thread the machine? (Threading the upper thread)" .
The bobbin thread is not correctly threaded.
Correctly thread the bobbin thread.
For details, see "How do I install the bobbin wound with thread? " .
The lower thread tension is incorrect.
Adjust the tension of the bobbin thread.
Bobbin thread is incorrectly wound.
Use a correctly wound bobbin.
Needle is turned, bent or the point is dull.
Replace the needle.

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