| When I measure a Point with the Portable Arm, the measurement is inaccurate. If I use the 15mm ball, I get an approximate error of 7.5mm. If I am using the 6mm ball, I get about a 3mm error. What is happening? |
PC-DMIS is capable of performing 'probe compensation' automatically using Romer arms. The first 'hit' taken of a feature (circle, sphere, etc.) must be pointed towards the surface. This tells PC-DMIS if this is an inside feature or an outside feature. When measuring a Point, you need to be more careful. If you are not using cad, PC-DMIS can only compensate in X+, X-, Y+, Y-, Z+ and Z- when using Guess Mode. During these measurements, you MUST point the probe perpendicular to the surface of measurement for an accurate reading. If the surface you are attempting to measure has a compounded angle, Vector Point must be used, or Find Nominals when using cad.
|