Multi-axis processing machine and rotation center measurement method of multi-axis processing machine

A multi-axis processing machine which relatively moves tables and a tool, comprising:

• the tables on which a work piece is placed;
• the tool for processing the work piece;
• servo motors which are arranged on the tables and the tool;
• an overall control unit which drives the servo motors;
• and a numeric value control unit which calculates directions and positions of rotation centers of rotation axes of the multi-axis processing machine, wherein
• the numeric value control unit comprises:
• a processing program acquisition unit which acquires the processing program;
• a processing program analysis unit which reads command angles of tool postures from the processing program and analyzes the command angles, and calculates measurement angles based on the analysis results;
• and
• a geometric deviation measurement unit which relatively moves the tables on which a reference sphere is placed and the tool to measure a position of the reference sphere using the calculated measurement angles, and calculates directions and positions of the rotation centers.