I am useing certified ring guage for calibration of my probe.  I center the probe in the guage with Haimer being careful find the center of the X and Y.  The program runs and I repeat for the radius.   I think to myself that I am all set... wrong.  I use the newly calibrated probe to find the center and width of  a 1" guage block and the probing routine finds .007 error.  I double check by cutting a square piece to a width approximately the same as the ring guage diameter and measure by a caliber.   It is spot on at less than a thou. The machine can cut accurately but the probe can not measure it accurately. I see no way to compensate the probe calibration.  Need help

depends on the code you are using for probing.
Show us your code.

I have been working to focus on the problem better than my last post... here it goes

Statement of problem:
Probe does not calibrate with the probe calibration function in Mach4.
The equipment:
The probe is a wired  s5000 Drewtronic https://drewtronics.org/.  Mach4.20.4162 warp 9 ess 242.  settings are petty much stock default.   These are no custom scripts or script modification.
What I know about the problem can be illustrated by the following sequence:
Three different probe stylus with different ball diameters were calibrated to a certified ring gauge. For each test the center was found with a Haimer with a runout of less than 2 thou. After each test the same .46" ring guage was measured by the probeing program .  The guage was not moved between calabration and measurement.

Test 1) probe dia .156 in indicated x offset =.0006 and y = .0007.  The measured gauge diameter was off .0012
Test 2) probe dia .125 in indicated x offset =.0134 and y = .0078.  The measured gauge diameter was off .0315
Test 2) probe dia .100 in indicated x offset =.0151 and y = .0021.  The measured gauge diameter was off .0606


I have no idea what is going on here.  Need some help

ok, Mach4, i am out, sorry.