It worked fine when I did the simple 2D plate of 5mm.
So physically I know the spindle can go down further.

Does the axis travel in mach (i.e. is the Z travelling in the mach "DRO" for the Z axis?).
No idea what that is. Will look into it.

Using the stock Mach3 from Fusion.


Simulator works fine. Even goes down the -2mm I set off the bottom of the stock.


The Gcode says the Z to go further,