Originally Posted by
meyert
I have had this happen. And I rip it all out because its a mess and I don't know if it will hold up. I don't know what causes this, but my solution has been to just start over. My experience is that it takes less time to start over than to fight with it. I unthread the machine and wind a new bobbin and then rethread and then it works fine. I will be interested to see what others say
This occasional happens to me with my Bernina 1530 but I have usually had to refill the bobbin or replace the top thread. Yes, just start over and rethread your machine. If you check everything, then maybe something has happened to your bobbin and it needs to be taken in for servicing.