Spindle Touch-probes are fun.
I use One also to calibrate my Haas.
Mine is a wireless Renishaw w/Ruby ball. (Looks like yours is Ruby as well?)
Each time I put the probe into spindle, I have to check for concentricity. I use a dial indicator against the ball and rotate. I adjust with Hex-screws on my probe adaptor I had made in CA for my ISO-20 taper tool holder. I make sure the ball is as centered as possible with my measuring equipment.
then....
I calibrate the actualy diameter of the Ruby ball with a master ring guage of known diameter
then....
for the length I use a different table-mounted Renishaw wireless touch-probe and manual dial indicator with master-tool of known length.
To do the above, I run programs to edit or measure the Ruby's diameter and length each time I use it, before I start any actual measuring.
Now, my actual Spindle-probe is fully calibrated, and the real measuring begins!! LOL
What company's probing system did you add? Do you have access to the list of macros to run with it? Did you watch someone calibrate that probe when it got installed?
Here is an example of a ring-guage. It is used as a starting point to measure other things...
http://www.ebay.com/itm/Etamic-Mode...ultDomain_0&hash=item232ffe58a0#ht_160wt_1362 I bought Two off eBay for myself to use. I tried to get the most accurate I could around 1.5-2" I.D.
I install my probe and manually jog the probe into the ring (mounted onto milling table),then run a program to bounce around inside the ring of known diameter to determine the diameter of the Ruby.
Scotty