I include an accurate model of my stock in CAM, this allows me to set zero based on my stock edges and know that my job fits comfortably within,
Regards,
Nick

Hi Picengraver,
is the code in the link you posted a great deal different to the visual display already offered by Mach with the displayed boundaries.

I note that the code uses the pound variables generated by Mach corresponding to the max XY extents of the part program. It uses these
extents to move the tool in a rectangular fashion, it does not trace the outline of the part but rather the rectangle which contains it. If the
part is within the boundaries the toolpath will complete but if not then the path will fail softlimits if active or Estop when hard limits are
encountered.

Why?

Craig

Sorry, but not my code.  Easy to try the example on your machine I think.