15-91 bobbin issues
I had to order a replacement bobbin case for my 15-91 and I am not sure if it that or my machine is giving me trouble. The machine will sew fine for a few stitches, then stop, and the bobbin thread won't come out anymore. So, I cut the thread, open the slide plate, remove bobbin case and the thread is so tight it won't pull out. It was doing fine when I put it in. I have checked to make sure I am threading the bobbin correctly, thread coming over the top, but still it does this. So, is the machine messing up or the bobbin case? It almost seems like the bobbins don't fit properly (I am currently using some metal ones I bought at Hancock Fabrics, not the Dritz brand). Since the case is brand new I did not think it would need to be adjusted. I ordered it from Sew Classic. Also, I have read on QB to use the metal bobbins in these machines, but Sew Classic recommends the plastic...should I go w/those since I ordered the case from there also?
I hope my description makes some sense. Thanks for any help,
Jp