I have a Janome machine, just got it out of the shop after a full service. I was sewing along fine when all of a sudden it started making a "thunking" noise. I took out the material from under it and found the thread from the top was getting caught around the little lip that the bobbin case is supposed to up against. I thought it might have not been threaded correctly, did it over and over and over, changed bobbin's etc. but it still catches in that one section.
Any idea what could be wrong? I can't get the machine back to the shop because I can't drive that distance so I'm stuck until hubby gets back from a FEMA assignment in WI.