Opto-electronic position measuring device for coordinate measurement - has surface of measuring rod contacted by support rollers for relatively displaced scanning device connected to earth

摘要

The device has a non-conductive measuring rod (5) attached to a carrier (1) and provided with position markings which are scanned by a relatively displaced opto-electronic scanning device (9), to provide signals representing the position of the scanning device. The latter is supported from the measuring rod via rollers (12), the surface of the measuring rod contacted by the rollers electrically coupled to an earthed conductor layer.(13).