Thanks to everyone who’s replied. I’ve spent another few hours tightening and re-tightening as many elements as I can.
1) Chatter wave height has dropped significantly. It’s still there, and at a much higher frequency, but definitely not as bad as it was…
2) After some research, it appears...
My first post, already worried that I’m putting a machine engraving question in the hand engraving forum, but didn’t see a better alternative! Apologies in advance!!!
I‘ve got an old straight line engine I’m trying to get productive, but have run into an issue which I can’t seem to resolve...