So, I am using a romer arm to measure concentricity of two holes. With a traditional CMM (and different software) we have found the concentricity of the holes to be 0.26mm. However, with the romer arm it shows the concentricity to be 2.9mm. If you take the acuals from the two holes and calculate the concentricity it should read like the traditional CMM???? Why is PC DMIS not giving me the correct reading? Any suggestions on how to measure this dimension with the Romer ARM?
Might be a dumb question, but are you selecting your features in the correct order? For example, the "datum" feature should be chosen second or PC-DMIS will calculate the results really funky. Also, if you're using an arm, have you made sure to set the proper probe comp by taking your first feature hit perpendicular to the surface? Not trying to be a wise guy, or doubt your skill, but I've seen these two factors come into play way too many times. Unless you're hammering the probe along your path, I would definitely excpect better results than those you reported.
Might be a dumb question, but are you selecting your features in the correct order? For example, the "datum" feature should be chosen second or PC-DMIS will calculate the results really funky. Also, if you're using an arm, have you made sure to set the proper probe comp by taking your first feature hit perpendicular to the surface? Not trying to be a wise guy, or doubt your skill, but I've seen these two factors come into play way too many times. Unless you're hammering the probe along your path, I would definitely excpect better results than those you reported.
