Machine tool measuring device for measuring the relative movement between two machine parts, wherein sequential measuring rules are arranged so that the distance between them is always less than that between measurement sensors

摘要

Device for measuring the relative movement of two machine parts (14, 18) that can be moved relative to each other comprises a number of marking rules (20a, 20b) with incremental markings (22) and two sensors (24, 26) for scanning the incremental markings. The distance between two sequential rules is smaller that a predetermined distance (Y) between the two sensors. An evaluation unit (32) uses the phase angle of the scanning signals of the sensors to determine their absolute position between two sequential incremental markings. An Independent claim is made for a method for measuring the relative movement of two machine parts that can be moved relative to each other.