Abstract: A method for operating a servo motor (10) driven turning station (5, 6, 7) of a stacking tool for a punch press includes the following steps: determining a target turning acceleration curve of the turning station (5, 6, 7) in the acceleration phase (A) of the turning increment (D); carrying out a reference acceleration run of the turning station (5, 6, 7); determining during the reference acceleration run the reference angular velocity (?ref) of the turning station (5, 6, 7); determining from the target turning acceleration curve the target angular velocity (?soll); calculating a target drive torque of the servo motor, at which the target angular velocity (?soll) results, from the relationship, known from the reference acceleration run; and accelerating the turning station (5, 6, 7) with the servo motor (10) in the acceleration phase (A).

Abstract: A method for operating a punching press with a press plunger driven by a crank drive, which operates in a machining zone of the punching press against a stationary clamping plate, and with a servo feed apparatus for intermittently feeding a band of material to be processed to the machining zone. In punching mode, the press plunger is moved back and forth by the crank drive between a first movement dead point (0°), in which the press plunger is at maximum distance from the clamping plate, and a second movement dead point (180°), in which the press plunger is at minimum distance from the clamping plate. In the process, the material band is pushed by the servo feed apparatus around the first movement dead point (0°) in a first rotation angle window (3) of the crank drive by a certain length into the machining zone and processed in a second rotation angle window during the feed pauses.

Abstract: A method for feeding a material strip to the processing zone of a punch press, wherein the material strip is clamped between a pair of feed rollers and is fed intermittently by rotating the feed rollers at intervals, and wherein the following steps are carried out after each feed of the material strip and before the next feed of the material strip in a feed pause with the material strip stationary and clamped between the feed rollers: holding the material strip by fixing the feed rollers with a certain holding torque; temporarily reducing or eliminating the holding torque of the feed rolls; positioning the strip of material with the holding torque of the feed rollers reduced or removed by inserting one or more pilot pins into associated pilot holes in the strip of material, the strip of material being displaced by the pilot pin or pins and the feed rollers being rotated by the strip of material clamped between them as it is displaced, optionally overcoming the reduced holding torque; and re-extending the pilo

Abstract: A method for operating a servo motor (10) driven turning station (5, 6, 7) of a stacking tool for a punch press including the following steps: determining a target turning acceleration curve of the turning station (5, 6, 7) in the acceleration phase (A) of the turning increment (D); carrying out a reference acceleration run of the turning station (5, 6, 7) while providing a certain reference drive torque by the servo motor (10) or while supplying the servo motor (10) with a certain reference supply current; determining during the reference acceleration run the reference angular velocity (?ref) of the turning station (5, 6, 7) when a certain turning angle is reached; determining from the target turning acceleration curve the target angular velocity (?soll), which should be present when a certain turning angle shall be present; calculating a target drive torque of the servo motor, at which the target angular velocity (?soll) results, from the relationship, known from the reference acceleration run, between the