Walking foot - feed dogs marking leather

[jimi]

On 4/23/2017 at 7:32 PM, jakc3 said:

Hello,

I have a question regarding feed dogs marking leather.

I have a Pfaff 335 sewing machine with walking foot feed. On softer leather the feet marked it as well but I solved that by gluing thin leather on the bottom of the feet. 

I still have issues with the bottom feed dog marking the leather. It's smooth, without teeth and it moves only horizontally (maybe just a little bit vertically but it is a negligible amount - 0.05mm). What it does is it leaves a line, which can't be rubbed off, on the bottom side of the leather.  First I thought this is because the plate covering it was slightly higher than the feed dog so I sanded it down to the same height. This however didn't solve the issue.

Are there any solutions/workarounds to this?

Many thanks,

Jakob

Hi Jakob, just saw this post? dont know if you fixed the problem or not?? this also happened to me on my 335 and the solution was to put a little bit of tape under the needle plate to bring it up to the feed dogs level. that stopped marking lines underneath the leather for me. hope this helps. regards jimi.

[buko]

On 4/25/2017 at 11:26 AM, Gregg From Keystone Sewing said:

I think Pfaff may sell various springs for this?  I'm not sure at all, just speculating.  I was looking in the books for 1245 and 335s with this type of two spring pressure foot setup, with nothing for sure.  I've seen different subclasses with different spring part numbers, maybe that's it?  

First off, I know very little about sewing machines so take what I say with a grain of salt. But my first thought when I saw Uwe's post was maybe you could buy a spare spring and shorten it to reduce the pressure.