Position detection device for linearly displaced machine tool or measuring instrument carriage using read heads for line rasters in combination with distance sensors for providing coordinate position of carriage

摘要

The position detection device has a position measuring system (20) attached to the linearly displaced carriage (14), having 2 read heads (34,36) for detection of 2-dimensional line rasters (29,31) provided by respective surfaces (28,30) of a reference normal (24) extending parallel to the displacement guide for the carriage. A distance sensor (40) detects the distance of the carrier (22) for the position measuring system and the surfaces provided with the line rasters for providing the position of the carriage relative to the reference normal in 2 further coordinate directions.