SOURCE: I need to know how to adjust the bobbin tension on
There is a tiny screw on the side of the bobbin case.
Mark the **** (in the screw head) position on the bobbin case with tiny dab of nail polish so you will know where the original setting was.
Left/loose and right/tight.
If you are adjusting because the bottom stitching is loose/loopy, first try threading the machine with the presser foot up to see if this solves the problem.
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