I just read your post again, and what a description!
"It just starts shaking the whole machine as if it was a lathe cutting corners off a square block." lmao
I build lathes that turn diff cases and I've heard that same noise, lol.
It sounds like something is very lose, and you can see this on an indicator. Where are you locating the indicator to see this? Start working your way back with the indicator until you find the source. It doesn't sound like an electrical problem to me, but mechanical. How are you locating the tools? If by a drawbar, how do you check the retention pressure? Just another thought on your interupted cut description.
Let us know what you find. Good luck. |