A method is disclosed for modifying coordinate data in a machining program in response to workpiece measurements made by a programmably controlled surface sensing element. The location of the workpiece and position of workpiece characteristics are determined by a series of programmed scanning cycles....http://www.google.de/patents/US4370721?utm_source=gb-gplus-sharePatent US4370721 - Method for modifying programmed positions by using a programmably controlled surface sensing element
