Pfaff 545 - Tread Pickup Lever Lifting Product Up

[Wizcrafts]

I think that the lifting of the top layer may be controllable by adding more thread slack on the upstroke by adjusting the check spring travel and its position in the slot in the disks on the bottom of the tension disks. Shortening the travel adds more slack thread. Moving the position of the disks to the left and right fine tunes the slack. I adjust the check spring disks position to reduce the snapping as the top thread goes around the shuttle.

[kgg]

I think if you haven't changed the threading path of the thread from the photo the problem is when you threaded the top post tension pin in the second hole then going back up to the first hole before you then threaded the thread into the second hole of the second guide then went directly in the little circular tension guide just before the main thread tensioner.  When you threaded through the small circular guide did the thread click in place? Is there a large amount of tension on the thread after the thread passes through the small circular guide? I think you may have a top thread tension issue contributed to by the thread path before your main tensioner which may explain why there doesn't seem to be enough slack in the thread so the top thread is lifting the material to get slack.

 

kgg

[Kryptonite]

Ok thanks guys, I'll work with the suggestions and report back.

[chrisash]

To me it looks like either the timing of the hook is a bit late or the bottom tension is holding back maybe a nick on the hook and then suddengy letting go. i think the video shows the tension comming off the top until the check spring takes up the slack a nano second later as it should which makes me thing its the bottom end

Not a expert by anymeans 

Edited November 7, 2018 by chrisash