I sewed a lighter weight fabric with no problem. The item I was trying to sew is like canvas or a Wilendur tablecloth. 2 pieces. Tried to sew that again after the lighter fabric and it broke again. I am using a heavier thread and I think it is a 14 or 16 needle.
I did take apart the bobbin case and cleaned and oiled it as well as the rest of the machine. It wasn't that dirty, just had a little gunk on that large silver bar underneath. So I guess my problem is with a heavier fabric? I'm still going to look at checkling that needle clamp. Thank you everyone