Why is my bottom bobbin thread bunching up?

Why is my bobbin thread bunching 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.

Why does my bottom thread keep jamming?

Make sure your bobbin thread is wound evenly on the bobbin. If the thread is wound uneven make sure the bobbin thread is through the bobbin thread winding thread guide when you start to wind your bobbin. … If the bobbin case has been inserted incorrectly into the outer rotary hook your machine will jam.

Why is my sewing machine bunching up the fabric?

Tension pucker is caused while sewing with too much tension, thereby causing a stretch in the thread. After sewing, the thread relaxes. As it attempts to recover its original length, it gathers up the seam, causing the pucker, which cannot be immediately seen; and may be noticeable at a later stage.

What part of sewing machine needs to be changed when the fabric is jamming?

Jammed Machine

Next, remove all the jammed thread; this may require removing the bobbin, the throat plate, and any other parts to release any jammed threads and get the machine sewing again. Before you start sewing again, check your sewing machine needle.

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