I need to measure a dimension to the centerline of a radius, but the radius is 2" and only covers an arc of about 25 degrees. Measured on the optical comparator, the radius is nearly nominal, but on the CMM it measures 2.117". This throws my centerline over .100" out of position. How can I create a centerline from points on the radius using the nominal radius? Can I force PC-DMIS to best fit a 2" radius to points on the surface?
Use a fixed Rad algorythem to find center of the rad. then origin on that circle. Now measure points on the radius and report the PR. It gives more of a profile but it will do your trick.
Sean is on the right track. We just discussed this in the user group. And there is a way to get an accurate reading for a small arc segment. I have to find my notes but I think Sean is correct.
When asked about it the "experts" quickly rattled of the sequence to achieve an accurate reading. They should put a step by step set of instructions together for everyone to go by. Every time someone says that the CMM doesn't measure worth a **** they bring up the segment of an arc. I frickin hate that! That's why I wanted know how to do it. So I could stick it right up their azz!!
Use a fixed Rad algorythem to find center of the rad. then origin on that circle. Now measure points on the radius and report the PR. It gives more of a profile but it will do your trick.
Sean is on the right track. We just discussed this in the user group. And there is a way to get an accurate reading for a small arc segment. I have to find my notes but I think Sean is correct.
When asked about it the "experts" quickly rattled of the sequence to achieve an accurate reading. They should put a step by step set of instructions together for everyone to go by. Every time someone says that the CMM doesn't measure worth a **** they bring up the segment of an arc. I frickin hate that! That's why I wanted know how to do it. So I could stick it right up their azz!!
