Quote Originally Posted by Doddy View Post
G-Code describes 50mm with a 12.7mm cutter. I reckon your machine is just plain haunted and we should all just self-isolate from it.

The bit that gets me is that it's a very precise 1mm error. But the G-Code is precise and correct.
It's always 1mm out

33mm hole was 32mm

99mm hole was 98mm.