First thing is the mach4 post from fusion is wrong for cutter comp
Both d and p are valid for mach4 but
The post uses p and all it does is to divide the cutter dia by 0.5 hence NBG
You need to modifiythe post to use D correctly ie. change the p *********xx to d *********xx
It’s a few lines to give you the pos and neg cutter comp
Have a look at the Fanuc post do a look up for the d******************
due to this stupid forum software rename the file to mach4.cps. and store in your personal post folder
I wil try top post again
I have a modded post that works I will upload when I am on the desktop