you may have a tiny piece of thread caught up in the works somewhere...
I had this same problem with my new pfaff after a few weeks. take it to the shop, when a machine gets stuck like that, it throws off the timing .
easy to fix, and important to fix.

Sorry, Lorchen- you're right that is important information. I have a Janome MC 4900. I would love the new Bernina but the only way that's going to happen is if I win the one they are giving away when we hit 50,000 subscribers (or was it 60,000?).
Lisa

It's terminal, buy the new Bernina!!.......... Only joking, couldn't resist in light of recent discussions.

Seriously, I don't know what make your machine is. I had a problem with the bobbin working properly. There is a very tiny spring inside my bobbin case (Husqvarna Interlude 445) and that was broken. All I needed was a new bobbin case. I hope your problem can be solved as easily. Good luck!

Hey all- my first problem with my sewing machine. It won't let me pull up the bobbin thread. I have rethreaded the bobbin and the top thread, I have removed and cleaned the bobbin case area of lint, and I have changed the needle. Just before this happened I had been having trouble with my seams gathering, rethreaded the bobbin and it worked fine. Then both my top and bobbin thread broke (about a week later) it was in trying to fix this that I got to the problem I am now having. It sounds to me (in all of my weeks of having a sewing machine ) like a bobbin tension problem but the knob my owners manual says to use to change the tension doesn't exist on my machine :shock:

Is there anything else I should try or does this sound like a trip to the sewing machine doctor?

Thanks

Lisa