Hello All,
Im quite new to CMMs and PCDMIS. I've only been actively working with the Romer Arm for maybe a month. Today I was probing a feature on a very large connecting rod for a frac pump which is a knuckle type feature consisting of an I/D cylinder and O/D Cylinder. I was using the 6mm Ruby and getting consistent oversized results on the I/D. I/D is to be 2.999 +/- 0.001. My readings were all ranging 3.002/3.004. When checked with tri-mic I was in tolerance at 3.000. I finally decided to switch to a 3mm Ruby and what do you know....now I'm in at 3.0002. So I'm not sure if my 6mm is damaged or if it's something I'm doing incorrectly. Any advice? Also my results checking the O/D with the 3mm vs 6mm only yielded a variance of 0.0012 substantially less than the I/D variance I saw. I appreciate the help. Thank you kimdly.
