From: Northern Nevada
Linda S, thank you very much for the link. I got around to watching it recently, and it was very helpful. Even though the model depicted was a Brother and mine is a Janome, the bobbin case is the same. The only difference is that my cover is one piece as opposed to the two-piece cover on the Brother. I think my problem is exactly as he mentions. Something happens with the upper thread (in my case, the thread escapes the tension arm very easily), and the resulting jam causes the bobbin case to discombobulate. I needed the reminder to make sure those little arrows are aligned when replacing the bobbin case!!
Mother to James (38), Sarah (35), Aaron (34), Adam (31) and David (28)