How do I fix loose bobbin tension?

Why is my sewing machine looping underneath?

A: Looping on the underside, or back of the fabric, means the top tension is too loose compared to the bobbin tension, so the bobbin thread is pulling too much top thread underneath. By tightening the top tension, the loops will stop, but the added tension may cause breakage, especially with sensitive threads.

What happens if bobbin tension is too loose?

When stitches become weak, bobbin threads show on the top or thread bunches keep happening, getting to know more about the machine will help solve the problem. … Too little tension, the thread will sag or not lay flat on the fabric because there is too much slack.

Why is the thread on my bobbin loose?

If your bobbin does not wind quickly and smoothly when you press on your foot pedal, your bobbin winder might not be fully engaged. This can cause uneven winding. Make sure you push your bobbin pin all the way over or loosen your bobbin wheel completely to engage your bobbin winding mechanism.

Why is my bottom stitch not straight?

If your thread is pulled tight on the underside and not forming an even stitch then (counter-intuitively) it’s usually the top thread tension that’s wrong. Sometimes very lightweight fabrics such as sheers can get dragged down into the machine so it’s a good idea to use a straight stitch plate.

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