I'm having a hard time understanding a very basic concept as far as CAM programming is concern in relation to actual cutting... I'm basically wondering where I should put my PROGRAM ZERO or PART ZERO. I always thought that it should be at a corner of the blank AT THE TOP, not the bottom but a friend of mine made a good point....
Let's say you program your tool paths (with your software of choice) to face a rectangular blank. In your CAM software you entered that your blank is 4" high and you program your toolpaths to face off .250" on top and the same amount at the bottom (after flipping it of course) to give you a finish part being 3.5" high.... ok so far so good...BUT... let's say that the blank in real life is not 4" but rather 4.05".... if I put my part zero on top, the finish product will not be 3.5" but rather 3.05" (although the software did its job)... Then I was thinking, ok I can put my part zero at the bottom of my part and the problem will be solved but I don't know if it can be done and how? What do people in the industry do in cases like these? Do they put the part zero at the bottom? if so, how do you do your tool offsets on the machine?
Thanks for all your help