What to do when sewing machine locks up?

Why won’t my sewing machine go up and down?

A disengaged clutch, broken drive belt or internal drive gear failure can prevent the needle from moving. Engage the hand wheel clutch if you have it disengaged for bobbin winding. … You’ll typically need to have a service technician examine the sewing machine and fix a drive gear failure.

How do you unjam a sewing machine needle?

Raise the needle to the highest position using the hand wheel. If the needle will not move, gently work the hand wheel back and forth a little bit to see if the needle loosens.

Why is my 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.

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