IMMG has developed a new CNC testing array dedicated to scratch testing. The array consists of two individual servo-controlled axes, one for the vertical movement of the stylus and another for the longitudinal horizontal movement of the specimen, incorporated in a five-axis CNC machine (linear movement in X, Y, Z, plus swing, plus swivel). A unique software controls the movement of all 7 axis and a fast data acquisition system records the vertical force on the stylus and the horizontal reaction of the specimen. In this way the classic constant and progressive load scratch tests can be accomplished as well as true constant depth tests on any 3-D geometry of the specimen.