We are a Calibration/Dimensional Testing Labortory. We have 7CMM's in our Laoboratory. We Design, Build checking fixtures mostly for the automotive industry, and Certify that the dimensional aspects of our products are correct using our laboratories CMM's. I'm looking for a procedure to evaluate the measurement uncertainties of our CMM's.
Things that effect our tests are:
1. Temperature of the CMM Lab;
2. Temperature of the item being checked
3. Material of item being checked
4. uncertianty of the equipment being used
Materials tested are mostly aluminum, steel, or plastic.
If yopu need more info let me know.
Thanks for your response,
Dave N