Why does my bobbin thread keep bunching up?

Why does my thread keep bunching up underneath?

Your Thread Tension Is Too Tight

Sewing machine manufacturers suggest that you don’t mess with your bobbin thread tension too much, but you should adjust your upper thread tension if you keep getting bunched up thread underneath your fabric. If your tension is too tight, it can pull your thread and break it.

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.

Why is the tension wrong on my sewing machine?

Needles, threads, and fabrics: Different thread sizes and types on top and in the bobbin can throw off basic tension settings. A needle that’s too large or small for the thread can also unbalance your stitches, because the size of the hole adds to or reduces the total top tension.

Do I need to adjust bobbin tension?

If the bobbin case doesn’t move at all when you jerk it the tension is too tight and you need to decrease the tension for sewing with this thread. … If the bobbin case drops quickly the tension is too loose and you need to increase the tension.

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