Brother Machine---Thread going under spool while sewing
I have been using the Brother CS770 for about two weeks now, and I LOVE this machine. However, the past few days I have had the thread to work its way under the spool while I'm sewing (wrapping itself around the rod the spool sits on), and it causes the top thread to tighten up, freezing up the machine. I have tried a few different spools of thread to see if it made any difference, but it didn't. A flaw in the machine, or should I continue to try other spools of thread? The first time I noticed this problem, the spool I was using was only about 1/3 full of thread, so I tried a new spool, thinking this would remedy the problem. It didn't. Any help would be appreciated.