Thread clumping

First, I know nothing about your machine. That said, when thread-nests occur *under* your work it usually means there is a problem with the TOP (needle) tension. Check your threading path carefully, re-thread from scratch. Clean the entire path if possible, gently "flossing" between tension disks. Change the needle!

A more remote possibility is a problem with the bobbin thread. Double check that the bobbin is in the correct way, and that the bobbin thread is under/through any tension spring.

HTH,

Beverly

"Thread clumping is self-explanatory to most of us who sew. A few reasons I can think of why it happens is: First, the needle must be the correct one for the fabric; 2ndly, the machine must be threaded correctly; and when threading, the presser foot should be in its most upright position. If not, the thread will not feed correctly in the tensions. The 3rd one is the setting of the tension in both the needle and sometimes the bobbin. There are several helpful people on alt.sewing that are better at explaining probably than me. Emily

I had this problem in the beginning with pre-wound bobbins. Some of them had a little uneveness (like a burr) where the thread would get caught after a few minutes of sewing. It was enough to cause the clumping you are talking about. I started using a metal nail file to smooth it out and that seemed to help. A related problem could also be burrs on the needle plate that catch the thread underneath and make it clump. Good luck. That problem is very annoying.

Kirsten

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Does the problem happen with every design you try or just on one design? If it's just one particular design that causes this, the problem is likely something in the design.

Does the problem happen when the hoop is moving in a particular direction? This could indicate a burr somewhere in the thread path that snags the thread when the hoop moves in that direction. Check the path of the upper thread to make sure there are no burrs. This includes the needle plate, rotary hook and the bobbin case.

Also check to make sure there's nothing except the thread being used that's getting between the tension disks.

gwh