Abstract: The invention relates to a device for the automatic assignment of the position of a rotating tool with respect to pre-machined toothing of a work-piece to be machined. According to the invention, the tool can be introduced in an arbitrary position between the tooth flanks. In a touch mode, the distance from the feed-in position to the tooth flanks can be determined by relative rotation of the work-piece to the tool and the desired target position of the tool can be calculated from this value.

Abstract: The invention relates to an X-ray device which operates with only a single image detection device whose format corresponds to the maximum exposure format. In order to facilitate the adjustment of the exposure field for an exposure, a respective set of exposure parameters is stored in a memory for each of the various organs to be imaged; this set includes inter alia an adjustment value for the size of the exposure field for an exposure of the relevant organ. This adjustment value is fetched and the diaphragm unit is automatically controlled in such a manner that the fetched adjustment value is (pre)adjusted.