The processing material's shape data is obtained by measuring the three-dimensional shape of the processing material W by the three-dimensional measuring device 45, the machine's shape data defining the three-dimensional shape of the machine side including the main shaft head provided...http://www.google.de/patents/US5751584?utm_source=gb-gplus-sharePatent US5751584 - Method for checking interference, method for checking processing program, and method for checking processing propriety 
