Sewing Puller?

[AlZilla]

I ran into a listing for a "Racing Sewing Puller". After I figured out that "Racing" is a brand and not some new sport, I dug into what kind of thing it was.  I see where "It is useful for sewing large and heavy workpieces like leather upholstery, tents, and car covers."  I could see where it might be useful.

But it appears to be used behind any old sewing machine and I'm wondering how the feed rate is coordinated with the sewing machine. It seems like you could overrun or run behind your sewing rate and either pile up material between the two or pull faster than the sewing machine wants to feed.

There's a real dearth of information to be found. Anyone know how they work?

Just curious, really.

[CowboyBob]

They are usually adjustable so you can match what ever stitch length your using.

[AlZilla]

10 hours ago, CowboyBob said:

They are usually adjustable so you can match what ever stitch length your using.

Thank you!

[Dave9111]

What would it cost to add a commercially available puller (Racing or otherwise)  to a Pfaff 1245  walking foot machine??   

An educated guess is ok. 

Most of the Racing units I have seen have a mechanical geared connection to the machine and the transmission and shafting is quite elaborate and it looks like the shafting might get in the way.

It seems like an "electronically geared" connection to the machine should be possible.   I've worked on industrial machine control systems that do that.  

I have a puller which is built into a Pfaff chainstitch machine and it is really nice for longer runs.   I have less material slippage issues when I use the puller.  It seems to be noticeably better than a walking foot setup alone.