Measuring @ A90B180 & A90B0 ERROR

[cumminsdesiel]

I'm measuring a block with a nominal @ value of 23.47. When I measure the block on the back face with points to get a plane i take it at my tip angle at A0B0 and that a point on the front face and measure the plane to the point i get the correct value. But when I measure @ A90B180 & A90B0. The distance is shorter that what its supose to be. Any thoughts are welcome?


Here is the sample data with the results of the length measurements.

[cumminsdesiel]

sample data

here is the sample data

[James Doolittle]

well that's not good. Is your ruby nicked at all? What does your last calibration result look like?

[cumminsdesiel]

the stylis are new and i've tried a couple of different style

[James Doolittle]

Can you rotate the part 90° and measure it from A90B90 and A90B-90? Keep measuring it from different orientations, to try to narrow things down.

Let us know.

[Jeffrey Lovely]

These cmm's will do anything
Just ask engineering