Monitoring procedure and a monitoring installation for numerically controlled machine tools

Abstract

A monitoring procedure and a monitoring installation for machine tools with a motor-driven work spindle and a separate protection device. The actual mass inertia moment of a tool fitted into the work spindle is determined by measurement and compared with a mass inertia moment calculated from the data of the tool. In addition, a predetermined parameter of a tool fitted into the work spindle is compared with that of the maximum parameter for the tool which is dependent on the strength of the protection device. The work spindle will be driven at the predetermined desired speed of rotation only if the actual mass inertia moment agrees with the calculated mass inertia moment and the predetermined parameter is smaller than or equal to the maximum parameter predetermined by the strength of the protection device.

Dependencies are inferred from the claim text.