Abstract: The invention relates to a method for operating a printing press, particularly a sheet-fed offset printing press, wherein at least two drives, whose positions can be controlled independently from each other, feed into a continuous gear train of the printing press. A desired torque distribution for the drives feeding into the continuous gear train is determined such that each drive provides a driving torque for the associated sub-unit of driven devices and in part for the sub-unit of driven devices associated with a drive connected downstream of the respective drive, wherein based on said torque distribution for each drive an individual angle target value is determined, which is used to control the position of each drive individually in order to provide an angular difference that is dependent on the torque distribution between the feed sites of the drives.

Abstract: A description of a method and a device for monitoring the braking of a D.C. motor of a printing machine such as a sheet-fed offset printing machine is given. For safety purposes, in the case of an emergency stop an electrical braking should always be carried out with the maximum torque of the D.C. motor. For this purpose, the disclosed method provides that the actual value of the armature current is detected and compared to a maximum permissible value for the electrical braking. In the event of an impermissibly high deviation and, in particular, in the event of an undershoot of the armature current relative to the maximum permissible value, the power converter and motor are disconnected from the power supply and an electrically actuable brake is applied to the motor.