TALK, TALK, TALK & SHOW your dealer what is going on with your thread. ALL machines are a little different, when I got my Pffaf I was told to ONLY use Sulky or Gutermann thread. I had nothing but trouble with the Sulky, but Gutermann was GREAT for me. Then I found out I could use Coats & Clark in the bobbin (but NEVER in the top), so you will find it can be different for you too. But it also sound like you have a burr (not sure if it's on the needle or on the bobbin), but when my baby starts to stripp the thread I know I have a burr (used to lose my mind over it, until I found out what was going on). Good luck