Man Roland Druckmaschinen Ag

Michael Schramm

Josef Hajek

Johann Königer

Johann K&ouml;niger

Peter Gröbner

Peter Gr&ouml;bner

Nils-Hendric Schall

Bernhard Feller

Stefan Geissenberger

Michael Dotzert

Michael Hess

Stephen Geissenberger

The invention relates to the drive of a printing machine. Cylinders and functional groups are to be driven with low technical expenditure. To this end, all form cylinders in a printing unit, for example, are driven respectively by separate electric motors and are not in mechanical drive connection.

Offset printing machine

The invention relates to the drive of a printing machine. Cylinders and functional groups are to be driven with low technical expenditure. To this end, all form cylinders () in a printing unit, for example, are driven respectively by separate electric motors () and are not in mechanical drive connection.

The invention relates to the drive of a printing machine. Cylinders and functional groups are to be driven with low technical expenditure. To this end, all form cylinders ( )in a printing unit, for example, are driven respectively by separate electric motors ( ) and are not in mechanical drive connection.

A web-fed offset printing machine includes printing units having at least one form cylinder and one transfer cylinder; and at least one folder unit; and wherein, for each printing unit, at least one of the form and transfer cylinders has a drive connection to a separate electric motor, the at least one cylinder has either no mechanical drive connection to a further one of the cylinders in case the further cylinder is driven directly or indirectly by a further separate electric motor, or a mechanical drive connection to one of the further cylinders in case the further cylinder is non-driven; the printing machine further includes a motor control system for the at least one electric motor for adjusting a printing group and for presetting the printing units for adaptation to either a different web path or production configuration, the motor control system has an input side; and a computing and memory unit for storing a plurality of cylinder positions connected to the input side of the motor control system.

In order to reach optimal web tension relationships rapidly in the folder superstructure when starting up a web-fed rotary printing machine, first of all a web is transported with the print in the printing units thrown off, the pull units lying on the web path being operated with first lead values for optimal web tensions and, after printing has been thrown on, the pull units being operated with second lead values for optimal web tensions.

Method of operating a web-fed rotary printing machine

The invention relates to the drive of a printing machine. Cylinders and functional groups are to be driven with low technical expenditure. To this end, all form cylinders ( ) in a printing unit, for example, are driven respectively by separate electric motors ( ) and are not in mechanical drive connection.

Offset printing machine with independent electric motors

A printing machine driven by one electric motor or by individual electric motors controllable by their own respective associated control systems. The control systems contain a subsystem observer or a total system observer, which obtains from the actual rotational angle speed (.omega..sub.ist) or the actual rotational angle (.phi..sub.ist) as well as from the electric-current or moment target value or actual value of the electric motor, an observed load torque (M.sub.LAST), which is supplied to the adjustment element as a component of the target moment (M.sub.soll). This signal can be applied via a differentiating filter or, in addition, via the proportional element, to the summing point. Alternatively to or in conjunction with the observer, a periodic compensation controller is provided in the control loop. The periodic compensation controller provides deviation-control for periodic disturbances and obtains, from the differential angular speed (.omega..sub.D), a component (M.sub.2soll) of the target load moment (M.sub.soll). To improve signal quality, filters can be used.

Printing machine with printing groups driven by individual electric

A cylinder for a printing press is adjusted away from a printing stock web or an adjacent cylinder by rotation of an eccentric element. The change in position caused by the movement of the eccentric element is compensated by an additional rotating movement superposed on the rotating movement of the cylinder such that the outer surface of the cylinder has no relative velocity relative to the adjacent cylinder or the printing stock web. Compensation is carried out by a regulating circuit to which is supplied the actual rotational angle of the cylinder with respect to the eccentric element and the actual rotational angle of the eccentric element with respect to the side wall or an angular function derived therefrom.

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Ainring, Germany

Michael Schramm