Originally Posted by
kathdavis
Clean it all out, CHANGE THE NEEDLE, rethread. I have a Janome embroidery machine and has had nothing but this kind of trouble. Sometimes I can fix it on my own and sometimes not. It has been in the shop 10-12 times for the same problem as you. Janome has a problem with the bobbin. It is noted in several blogs. Janome claims they have corrected the problem, but they haven't.
That's interesting ... I've had four Janome's, and have never had problems in this regard (or in anyway, as a matter of fact).
Now I'll just hope that I don't jinx things with this!