Tactile-Optical Contour Sensor

The Werth Contour Probe (WCP) is a tactile-optical contour sensor that combines the familiar contact probe with a laser distance sensor. Using this contour sensor, roughness and contour measurements can be performed with high precision in a coordinate measuring machine. As shown in Figure 26, the laser sensor, which is normally used for direct measurement of the workpiece surface, detects the deflection of the contact probe. One advantage of this arrangement is compliance with the comparator principle. By using the quick change interface, measurements can be taken either with the contour probe or directly with the laser.

Fig. 26: Werth Contour Probe with laser sensor (Werth Laser Probe) and change-out interface.

The integration of the tactile-optical contour sensor in a coordinate measuring machine allows fully automatic contour measurements in a large measurement volume. Another advantage is the high positional accuracy of measurement in the workpiece coordinate system. This is not possible with classic contour measurement devices. The measurement data are processed by software functions to determine roughness, dimensions, shape, and location (WinWerth®, see pp. 65 ff.).