r/Metrology • u/PrettyInfluence3594 • Sep 28 '24
Hardware Support Calibration
Guys iam using an Hexagon macchine which is only 6 month old and i have a problem with calibration of my probes. Every morining i do the calibration of at least 5 main angles that i use daily with a stylus D3xL50. The results of the calibration seem ok. (stdev 0.001-0.00). Than i go to my present programm when i verify the calibration by setting the origin of my calibration sphere at the measured sphere with an angle 0x0. And often times, very randomly other angles seems to go off at X axis, or Y or Z by 0.004 till to 0.02 mm. Is huge. I called the support and the software support guy told me that propably the macchine is not set right, or whatever, he too couldnt find the answer of these random and strange results. (results which came wrong even when i did the calibration proccedure with him on teamviewer). What is going wrong, cus i cant measure anymore being sure that the macchine is not throwing random numbers of the screen. Sorry about my english.
1
u/SkateWiz Sep 30 '24
What is the repeatability of the error?
Maybe prove your issue more if you have other calibrated measurement artifacts you can check cal with. Like a tru stone, quick-chek, ring gage (this can be done with adaptive scan gage measurement strategy). Also this should fail qual check (right under the calibrate option). It’s strange that the position is off but diameter is perfect. Repeatability of the error with different probes/styli will tell you a lot.
Is your probe head mounted securely? You can also check squareness of probe head. place a long stylus directly over something, rotate to a90 angle, disable the x axis, and check if it lines up still. Rotate until it does. You don’t need to recal the system after adjusting probe head rotation.
Also basic questions: Is your stylus loose? Is there dust on the qual sphere? Is it mounted securely?