Heidelberger Druckmaschinen Ag

Stefan Schreiber

Bernhard Buck

Malte Seidler

Eric Knopf

Axel Hauck

Uwe Tessmann

Detlef Strunk

Werner Joss

Matthias Nöll

A method and an apparatus control a printing press having a plurality of printing units, a plurality of cylinders which are coupled mechanically to one another and a control computer for controlling at least one drive motor which drives the mechanically coupled cylinders. A torsion model is stored in the machine computer for describing the torsion state of the cylinders in the printing press which are rotatably coupled mechanically to one another, as a function of at least one measurable operating parameter or at least one variable of the printing press which is known to the machine computer. A control of the printing press is performed by the control computer on the basis of the values which are calculated by the torsion model.

Control of a printing press using a torsion model and printing press controlled by torsion model

A method and a device for determining color register and lateral register deviations on printing material during production in multi-color printing presses, include a computing unit which takes into consideration the influence of ghosting effects when measuring the deviations on the printing material. The ghosting effects of at least one preceding and/or one succeeding printed image are recursively taken into consideration in the computing unit, when measuring on the printing material.

Method and device for determining register deviations through recursion analysis

A method of compensating for vibration-induced circumferential-register errors in a sheet-fed printing press includes compensating for at least one vibration-induced deviation of an actual angular position of a cylinder from a nominal angular position by adjusting the circumferential register of at least one printing unit, in particular of the cylinder. For this purpose, the current vibration state of the sheet-fed printing press is determined, the effect of the determined vibrations of an integer order on a position of color excerpts on a sheet of printing material is calculated, and the compensating circumferential-register adjustment required in accordance with the result of the calculation is carried out. A sheet-fed printing press for carrying out the method, is also provided.

Method of compensating for vibration-induced circumferential register errors in a sheet-fed printing press and sheet-fed printing press carrying out the method

In a method for compensating an oscillation which has a frequency spectrum with a number of discrete frequency components in a printing press, at least one counter torque is introduced into the printing press in order to compensate for at least one discrete frequency component of the oscillation. A first group of one or more frequency components are compensated for by introducing one or more previously determined counter torques, and a second group of one or more frequency components is compensated for by introducing specific counter torques as a function of a measurement, carried out during the operation of the printing press, of at least one signal which contains at least the one or the plurality of frequency components.

Method for compensating for an oscillation in a printing press

A method for controlling a drive () of a first subsystem of a printing press () which is mechanically decoupled from a second subsystem of the printing press (). In the method, a motion sequence is determined for the second subsystem in advance, the motion sequence being used as a reference curve for controlling the drive () of the first subsystem.

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Edingen-Neckarhausen, Germany

Stefan Schreiber