Operating Method of a Numerical-Control Machine Tool and Detection Device for Implementing Such Method

An operating method of a numerical-control machine tool characterized in that it comprises the steps of providing the tool-carrying head of the numerical-control machine tool with a detection device adapted to measure the values of the tilting of the detection device relative to a predetermined reference inertial plane; and moving the tool-carrying head in space so as to place said detection device in succession in a multitude of control points distributed on a first detection plane, and create at least a first digital map that contains the tilting values of the detection device relative to the reference inertial plane, in each of said control points.