Sampling issues in coordinate metrology – R. J. Hocken

Coordinate measuring machines acquire data one point at a time on the part surface being measured. These data then must be analyzed in order to produce a substitute geometry for comparison to the design intent. Algorithms are then used to analyze these data. The results obtained depends strongly upon the measuring errors, the form error of the part , the sampling strategy , and the density of the points sampled. This article reviews the areas where errors may arise and discusses some of the progress that has been made in addressing them during the past few years.