Hi, I'm new to this forum and was wondering why there isn't a Tarus area like the other CMM's? I've been checking for about 8 years now, and for the last 3 years as a QC leader. I've only worked with Mora CMMs and Tarus.
If anyone can give me any feed back about a common problem I run into on a Tarus it would be much appreciated. When I set Tooling Balls onto a checking fixture, and the builder dowels them in place I almost always get an error when I check them later.

I would feature them to get an xyz coordinate, use those numbers as master and then re-check the tooling balls. When I first do that I can always get a good reading, but say the next day when I double check the numbers before I have the builder value them out on the base, I almost always have a little different reading. .05 to once and a while .1 It just baffles me to no end! I tell everyone that they've entered into the Tarus zone. :-) Whenever we get a job that must go through 3rd party cert., I just tell the 3rd party source to value the balls and I'll use their numbers. I used to stamp the values to the base BEFORE third party cert., but trying to remove stamping is a real pain when they get different values.

Yes, when I get a job back from 3rd party I take their numbers and double check them, but I sometimes think what's the use if I can't even repeat myself. The check on the Tarus is an automatic check for spheres. The approach angle is dictated by the probe rotation and is almost always 90,180 (straight down). You have to type in the spheres diameter, which I always double check with mics, and just let it run. It takes 9 hits to do its calculations and you cannot adjust that number.

Any suggestions?
Thanks
Mark Hait
QC leader
Fixture Division
Gage Pattern & Model Inc.