Help troubleshooting an Allbook & hashfield 'success' cup seamer

[MaliMac]

Hi there, I sew sheepskin at a tannery on allbook & hashfield 'success' cup seamers. One of the machines is difficult to use and I think it's a problem with the feeding disc. The sheepskin isn't being fed through consistently so the stitching gets bunched up and is very uneven. Compared to the other machines I think the feeding disc on the problem machine feels a bit slack to turn by hand and wonder if this could be the issue. There is a hex bolt in the axle that turns the feeding disc and I wonder if tightening that will make the feeding disc a bit stiffer and more functional. Does anyone have experience of this? Ive attached a couple pics of a similar model (I'm not at work today, just at home mentally troubleshooting) Thank you!

 

 

Edited March 26, 2023 by Northmount
Removed a couple feet of white space between text and pictures

[Northmount]

8 hours ago, MaliMac said:

stitching gets bunched up

Moved your post to leather sewing machines.  I think you'll have better luck here.