I know how you feel. By now the dealer and repair guy probably think you are one of the 'eye rolling here she comes' customers. LOL I had a machine that would not sew at all at guild sew day. It sewed perfectly at home. Same thread, needle and settings. It drove me nuts. I never did find the cause. DH said it may have something to do with the plug at the sewing room. There has to be an explanation for your machine.