Patent ID: 7891104

Claim:
An engagement sensor device for engagement measurement for a machine tool for processing workpieces using tools or a laser, in the case of which the machine tool possesses a clamping device with a clamping face for clamping an object, in particular a tool or a workpiece, and the engagement sensor device is provided for the measurement or engagement of a face of the clamped object at the clamping face or any gap between the face of the clamped object and the clamping face, comprising at least one engagement sensor, arranged to the side of the clamping face, with a measurement range aligned in the direction of the gap or of the clamping face for the detection of an electrical or magnetic stimulation field, such field extending between the face of clamped object and the clamping face and being able to be influenced by any gap, the measurement range extending essentially along the clamping face in accordance with a depth direction of any gap or parallel to the clamping face.