Abstract: A method for referencing a drive position of an electric drive of a gripper half of a production gripper in a closed position of two gripper halves includes closing the open gripper halves, determining multiple actual positions of an electric drive and tracking error values of the electric drive in a time interval during the closing of the gripper halves until beyond a point in time in which the closed position is reached, determining a straight line based on the ascertained tracking error values depending on a related time-tracking-error function, determining the instant of the zero crossing of the straight line of the time-tracking-error function, and determining the actual position of the electric drive that corresponds to the instant of the zero crossing of the straight line of the time-tracking-error-function. A production gripper and a respective control device for operating the production gripper are set up to carry out such a method.

Abstract: The invention relates to methods for referencing a drive position of an electric drive (20) of at least one gripper half (14, 16) of a production gripper (10, 12) in a closed position of two gripper halves (14, 16) and a system of a production gripper (10, 12), in particular a welding tongs (12), clinch tongs or crimping tool and a respective control device for operating the production gripper (10, 12), which is set up to carry out such a method.

Abstract: A process and a device for controlling the pressing force of the electrodes [of an] electrode holder driven by means of an electric motor, especially of an industrial robot, during the welding operation characterized in that the motor position is controlled or that a means for controlling the position of the electric motor is provided.

Abstract: A process and a device for controlling the pressing force of the electrodes [of an] electrode holder driven by means of an electric motor, especially of an industrial robot, during the welding operation characterized in that the motor position is controlled or that a means for controlling the position of the electric motor is provided.