I have been stitching most of my leather projects by hand and decided it was time to purchase a leather sewing machine. I purchased a very old Singer 28K71 Leather Patch Machine. I am running into some issues, and thought some more experienced folks could help me out.
My main issue is with the thread bunching below the leather I am stitching. It only does it on softer leather, I can sew through thick tooling leather with no issues. The tension seems fine on the thick pieces, but as soon as I transition to a softer piece, I get a big old nest of thread underneath. Needless to say, I can't finish my project until I figure this out.
I attached a few photos of the machine I have. Again, any help would be great! I look forward to posting and learning more.
~Old Toby