Originally Posted by
GEMRM
If the bobbin thread doesn't get engaged (into the thread guide and up for pickup) it will come off the bobbin but not under any tension, so it will end up like that.
Yes I think that is my problem. Won't play with it anymore tonight. I wind a new bobbin tomorrow and try again. I just filled two bobbins today to try bottom line thread. Maybe my Juki 600 doesn't like that thread.