Patent ID: 8688269

Claim:
Apparatus for teaching a gripping device ( 10 ) for loading and unloading a chuck device ( 40 ) of a machine tool and/or a pallet ( 39 ), comprising: a gripping arm ( 11 ) fixed in place by a mounting end ( 13 ) and having a free end ( 13 ) that can be freely moved in an operating region and bears a gripper ( 15 ) with at least one pair of electrically conductive gripping tongs ( 16 ), an insulating part ( 31 ) that electrically insulates the gripping tongs ( 16 ) with respect to the mounting end ( 13 ), a control unit ( 25 ) that is electrically connected, via a control line ( 29 ), with the at least one pair of gripping tongs ( 16 ) and can apply, via the control unit ( 25 ), a direct voltage (U) to the at least one pair of gripping tongs ( 16 ) or to an electrically conductive measuring body ( 48 ) held by the at least one pair of gripping tongs ( 16 ), a grounded, electrically conductive reference component ( 38 ) that has at least two reference surfaces ( 47 ) aligned at right angles to each other, a detecting arrangement ( 32 ) for detecting a current (I) in the control line ( 29 ) when the at least one pair of gripping tongs ( 16 ) or the measuring body ( 48 ) comes into contact with the reference component ( 38 ).