Measuring apparatus and method for correcting errors in a machine

摘要

To provide a measuring apparatus of positions and postures of a machine for correcting positions and postures of an end effecter by means of an actuator, and an error correcting method for correcting errors thereof. At least three universal joint fixing members 2 are attached onto a base 1 that comprises a measuring reference; steel balls 3 are fixed to the respective universal joint fixing members 2 as universal joints; a steel ball 5 is fixed to a universal joint fixing member 9 as a universal joint; a universal joint fixing member 4 is attached to an object to be measured 7 that is supported by means of another member; and a measuring device 6 is attached to between the steel balls B3 and the steel ball 5. By using such a measuring apparatus, geometrical errors of a mechanism in a machine are estimated and corrected based on measured values on positions and postures of the end effecter.