I am new to PC DMIS so please bear with me. My part is cylindrical, has an axially aligned through bore and a conical taper in the ID as well as the OD. The conical sections are approximately half the length of the part. Pretty simple. To measure the cones, I'm creating a plane at the top and bottom of my part. I am then probing two levels on each cone, at least 4 points per level. I then create circles at the intersection of the cones and the top and bottom planes. I get very consistent results when I run the program in DCC but I am getting an error of .3mm on a 250mm OD taper and similar on the ID. I am able to measure the OD taper on a granite surface plate using rollers and a micrometer and the old school results agree with the 2D CAD file that we have for the part but not the output from the CMM. The machine was just calibrated on Wednesday and I have checked and calibrated my stylus as well. Any help is appreciated. The machine is not networked yet so I cannot send a program file.
Glenn
