In addition, the principle of self-centering measurement with measuring probing systems is shown here based on the example of the fiber probe (Fig. 25). A calibrated sphere is positioned in a tooth space to determine the pitch errors of a gear. The position of the sphere on the gearwheel results from the value measured by the fiber probe (position of the sphere in the image field) and the coordinates of the coordinate measuring machine. Values such as the dimension over two balls or the pitch of the gearwheel can then be determined based on several positions measured in different tooth spaces. The profile can be measured by probing the tooth flanks.

After the image processing sensor, the fiber probe is one of the most accurate sensors now available for multisensor coordinate measuring machines due to its unique method of operation.