METHOD FOR OPERATING A TURNING STATION, DRIVEN BY A SERVOMOTOR, OF A PACKETIZING TOOL FOR A PUNCH PRESS

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 (ωref) 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 (ωsoll), 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 (ωsoll) results, from the relationship, known from the reference acceleration run, between the reference angular velocity (ωref) and the drive torque of the servo motor (10); and accelerating the turning station (5, 6, 7) with the servo motor (10) in the acceleration phase (A) of the turning increment (D) while providing the target drive torque by the servo motor (10).