I have cleaned and I mean thoroughly cleaned the machine, the bobbin the tension wheels everthing. rechecked and changed needle 3 times (different needle each time) rethreaded the machine at least 5 times, even gave it a good oiling. Yes presser foot is down I have a BIG sign on the front of my machine to remind me. thanks for all responses. Any one looking to buy a bbylock quilters choice? CHEAP LOL