I have a vertical bobbin Pfaff with a problem thread cutter. It's always the BOBBIN thread that is cut too short. The top thread stays in the needle but won't catch. Biggest complaint about the Pfaff.

I have "fast" eyes. I watched and could see the tension release on the needle thread when cut.

Update: Thank you, thank you, thank you! The suggestion on threading through the top tension threading bar (with the 3 holes was the solution. Now how difficult would it have been to include a hint on resolving the thread utter? susan

From the manual Pg 9 under threading
http://download.brother.com/welcome/...q15_om01en.pdf
Make sure thread take-up lever is in highest position and presser foot is up. When using polyester thread or thread
that tangles or breaks, run the thread through all three holes of the thread guide.If the thread is still tangles or breaks, run the thread through the holes backwards as shown in diagram.

That doesn't work for me at all. I use one hole and that is just for a guide. My thread problems were solved once I stopped using the 3 holes as a tension guide.

My manual on page 5 says to press the thread cutter button with the pressure lever down. I've never used the thread cutter with the pressure lever up.

I know that none of my machines like the skinny spools of thread. The thread gets too curly.