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?
Occam's Razor: I'll bet that either the CMM's part alignment doesn't match the Romer's part alignment, or the CMM circle doesn't match the Romer circle, most likely in height.
either that or there is significant operator error in the Romer's circle (shanking out).
Occam's Razor: I'll bet that either the CMM's part alignment doesn't match the Romer's part alignment, or the CMM circle doesn't match the Romer circle, most likely in height.
either that or there is significant operator error in the Romer's circle (shanking out).