Last night I started working on my first FMQ project (quilting my OBW). I practiced first, and kinda got the hang of it. Tackled the quilt itself. I got about 2/3 of the way done with the middle (borders are a separate issue) and then my top thread started breaking. I'd rethread the machine being sure it was correct (pressure foot up, etc.), changed the needle. Same problem. Changed the tension. Same problem. Started with a new spool of thread, new bobbin. Same problem.
I'm using a Sulky rayon thread and a size 11 quilting needle.
Any idea what's going on and how to fix it?
My machine is Janome 6600.
Thanks for your help!