Originally Posted by
leaveme
For instance, my base plate is at -6.10 and I put the material (i.e height 0.75") there for curving. How do I configure it in Mach3?
Use the 'touch-off' feature. Bring the tool to the surface of the part and designate that position relative zero. Really easy if you're only running one tool. Beware of entries in the tool length offset register. I'm not a Mach user but those general rules should apply.
If the finish height on a part is 2" I might measure to the table top and factor in the 2" in the touch-off dialog box. Depends if the unfinished top surface is irregular. (That's assuming the part is clamped directly to the table.)
If you're running multiple tools there are more decisions to be made.
Anyone who says "It only goes together one way" has no imagination.