Measuring Surface Finish On Large ODs

摘要

The reason for this is in the nature of the probe. Probes for simple roughness use the part surface as a reference and follow its contour as the individual peaks and valleys are measured. Therefore, it is not that critical to exactly align the surface finish gage to the axis of the part being measured. For example, if a probe is not perfectly aligned with the axis of the part, then instead of riding on the crown of the part, the probe would run over the crown.