Hello,

Is there a setting in Mach 3 that tells the system to use the center of the bit rather than the outer edge when zeroing your X,Y,Z axis?
I've just installed a triple-edge finder with some code that finds the center of the hole and calculates the center of the bit.  I have been having some strange issues since installing this where my parts aren't coming out the correct size.  I'm still troubleshooting, but one thing I wasn't sure of is if the machine is trying to use the outer edge of the bit rather than the center? 

Any ideas on this one? 

Have you calibrated your probe?

Oppps,   I realized I posted in the wrong section.  I have Mach 3 not Mach 4.  I don't believe this screen is available in Mach 3?

No matter Mach3 or Mach4, center of the spindle is center of the spindle. How you achieve that is the question!! Edge finder, allow for half the diameter. Cutter (bit), allow for half of THAT. Not sure what else to even say.

Thanks Tom.  That makes sense, just wanted to make sure I wasn't missing something somewhere.  I was expecting it to use the center of the bit at its origin, but my parts aren't coming out the right size. 

I guess you could always MDI to X0 Y0 and see where the cutter lines up with your part or whatever you have set as work offset X0 Y0.