My machine is trying to drive me insane! The bobbin thread keeps getting all bunchy. It's coming out in a blob. i've tried tightening the bobbin tension, re-inserting the bobbin and re-threading the whole thing. Any sewing gurus know what I did to make the machine so crabby? Or any clues on how to make it a happy machine?
That happened to me and i found out that it was bc i hadnt been maintaining my machine properly...it needed to be lubricated with sewing machine oil. I put a teeny bit of oil on all of the moving parts that i could see when i took the cover off. Just make sure you sew with some scraps after you oil the machine to get rid of any excess.
Another thing it might be is a buildup of lint around the feed dogs..that can really interfere with the thread. i use an air compresser to blow out the fuzzies now.