| 摘要 |
Whereas, for reasons of efficiency, high operating rates are necessary for charging and discharging the stacking table 2, the stacking table 2, for example, on the feeder is readjusted via the lifting device, intermittently, such that the topmost sheet can always be freely received by the suction head and conveyed into the machine. The invention is based on the object of proposing a drive and a process for controlling said drive which optimises the readjustment of the stack during the printing process. This object is achieved in that a brushless DC motor 4 is designed as a stepping motor with external commutation. This means that the control electronics 8 activate the phase windings 9 such that the brushless DC motor 4 is driven successively into the sequentially correct static rotor positions. <IMAGE> |
