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.
Will you adjust tension on bobbin thread?
As shown in the illustration, hold the bobbin case against a smooth vertical surface. If the thread with the weight attached is slowly pulled out, the thread tension is correct. Use the included standard screwdriver to turn the tension-adjusting screw and adjust the thread tension.
Probable Causes: – Top or bobbin thread is not set correctly. – Make sure that the bobbin was threaded properly in the shuttle race. …
What tightens or loosens the flow of the thread?
You’ve probably noticed the tension regulator on your sewing machine. It’s usually a dial with the numbers 3, 4, and 5 highlighted or circled. This regulator tightens, or loosens, the tension discs that the thread passes down through before it goes up and through the looper.
Why is my bobbin thread not catching?
Check the upper thread. – Check to see if your upper tension is too tight. … – Your thread could be caught on something between the needle and your spool of thread if so, your thread will be too tight for the needle to pick up the bobbin thread. – Make sure that the upper thread is threaded properly.
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.
Why is my bobbin jumping?
There could be several reasons why the bobbin is jumping in the bobbin case. … The thread was not wound properly on the bobbin. Wind the bobbin thread properly.