pfaff 345 timing went to heck

[barclay]

Hi Guys and Gals,  My 345 has been stitching perfectly until about an hour ago.  I was testing some vinyl and it jammed, now the timing is off by almost 180 degrees.  Where to start?

Edited November 10, 2024 by barclay
did not finish that's all.

[AlZilla]

 Here are a bunch of manuals:

https://leatherworker.net/forum/topic/85809-pfaff-345-service-manual-download/?do=findComment&comment=582713

 

This thread talks a little about timing a 335:

Maybe it'll help. It also mentions needlebar height. I don't know if it could slip enough to go 180 degrees out.

Maybe one of the big dogs will sniff this one out and have an easier answer for you.

Edited November 10, 2024 by AlZilla

[Northmount]

1 hour ago, barclay said:

Hi Guys and Gals,  My 345 has been stitching perfectly until about an hour ago.  I was testing some vinyl and it jammed, now the timing is off by almost 180 degrees.  Where to start?

It jammed, so does it have a safety clutch?  If so, you need to reset it.  Can't do anything with the timing it it is tripped.

[barclay]

I don't believe it has a clutch.  it would be on the center shaft looking at the bottom, correct?

 

[Uwe]

If your machine doesn’t have a safety clutch , then you’ll have to re-time the hook.

The Pfaff safety clutch looks and works differently from other manufacturers. I made this video some time ago:

 

 

 

Edited November 11, 2024 by Uwe

[barclay]

thanks Uwe.   the vid did not open but I got it sewing again.  loosened the gear below the hook on the horizontal shaft from the right end of machine, the center shaft. retimed it and it stitches.  hope that is what I should have done, just made sense that when it jammed the gear slipped.