I check all above even changed the bobbin. Still having the issue. I noticed when I was testing it it felt like it was catching on something. I think it's getting caught on the cover plate. Will have to have hubby see if he smooth it out. It is nicked a little. I only have a month to get a total for 3 quilts quilted. Two are ready one I still have to be put together. Nothing like waiting til the last minute