I agree with Sue. Clean it Well. I like a paint brush and a pipe cleaner to get as much lint as I can find. Floss out your tension disks. Don't forget your bobbin case. If it has a little arm that the screw holds on? Run a thin needle/pin under there. It gets linty too and can affect your tension. Hope you solve your tension probs! I had trouble with my long arm for over a yr. Finally it just went away. Maybe I was holding my tongue out just right....
Also try a diff bobbin. Sometimes they get out of round and don't spin well.
Last edited by QuiltnNan; 03-07-2016 at 05:01 AM.