Method and device for controlling a drive unit of a pile-lifting device at a sheet-fed printing machine
 A method of controlling a drive unit of a pile-lifting device located at a sheet-fed printing machine includes starting-up the drive unit with a first mode of operation selected by an electronic current wherein rated torque is high and rated speed is low for respectively lifting and lowering the pile and, after a given period of time, following the starting-up of the drive unit, switching to a second mode of operation of the drive unit wherein the rated torque is low and the rated speed is high if the speed has exceeded a preset value during a lifting of the pile, and has not exceeded a preset value during a lowering of the pile; and a device for performing the method. 
Heidelberger Druckmaschinen AG
B Y Y B
B65H Y10S Y10S B65H
additional additional additional inventional
Christian Stephan Helmut
Thomas Kirchhoff Meyer