Workpiece clamping device, machine tool, and method for clamping a workpiece

A machine tool, comprising

• a machine frame,
• at least one workpiece holder, and
• at least one tool holder,
• wherein the at least one workpiece holder is or comprises a workpiece clamping device, said workpiece clamping device comprising
• a base,
• a first clamping jaw which is displaceable relative to the base,
• a second clamping jaw,
• wherein a workpiece is clampable between the first clamping jaw and the second clamping jaw,
• a drive,
• an actuating element which is displaceable relative to the base and which is coupled to the first clamping jaw,
• wherein a displacement movement of the actuating element is brought about by the drive and the actuating element brings about a displacement of the first clamping jaw,
• a transmitter which is arranged on the actuating element and is displaceable together with the actuating element and is displaceable relative to the actuating element,
• a first stop and a spaced-apart second stop for the transmitter, between which stops the transmitter is displaceable together with the actuating element,
• wherein, when the transmitter abuts against the first stop or against the second stop, the transmitter is displaceable relative to the actuating element, and
• a sensor by means of which one or more positions of the transmitter are detectable.