EP1834772A2 - Printing press and method for operating the same - Google Patents

Printing press and method for operating the same Download PDF

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Publication number
EP1834772A2
EP1834772A2 EP07003634A EP07003634A EP1834772A2 EP 1834772 A2 EP1834772 A2 EP 1834772A2 EP 07003634 A EP07003634 A EP 07003634A EP 07003634 A EP07003634 A EP 07003634A EP 1834772 A2 EP1834772 A2 EP 1834772A2
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EP
European Patent Office
Prior art keywords
cylinder
printing
value
blanket cylinder
actual
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07003634A
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German (de)
French (fr)
Other versions
EP1834772A3 (en
EP1834772B1 (en
Inventor
Bernd Dipl.-Ing. Lindner
Bernd Dipl.-Ing. Marneth
Klaus-Peter Dipl.-Ing. Reichardt
Holger Dr.-Ing Wiese
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Manroland Sheetfed GmbH
Original Assignee
Manroland AG
MAN Roland Druckmaschinen AG
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Application filed by Manroland AG, MAN Roland Druckmaschinen AG filed Critical Manroland AG
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Publication of EP1834772A3 publication Critical patent/EP1834772A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/004—Electric or hydraulic features of drives
    • B41F13/0045—Electric driving devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/70—Driving devices associated with particular installations or situations
    • B41P2213/73—Driving devices for multicolour presses
    • B41P2213/734—Driving devices for multicolour presses each printing unit being driven by its own electric motor, i.e. electric shaft

Definitions

  • the invention relates to a printing press according to the preamble of claim 1. Furthermore, the invention relates to a method for operating a printing press according to the preamble of claim. 7
  • a sheet-fed press with several printing units wherein each of the printing units comprises a counter-pressure cylinder, a rolling on the impression cylinder blanket cylinder, a rolling on the blanket cylinder cylinder and an inking unit and a dampening unit.
  • the impression cylinders, the blanket cylinders, the inking units and the dampening units of the printing units are driven by a main drive.
  • the cylinders of the printing units are associated with their own drives or direct drives, which drive the form cylinder decoupled from the main drive of the printing press eigenmotorisch.
  • the impression cylinders, the blanket cylinders, the inking units and the dampening units of the printing units are driven by the main drive, while the forme cylinders of the printing units are driven by the respective direct drives, synchronized with the main drive.
  • the forme cylinders of the printing units are driven by the respective direct drives, synchronized with the main drive.
  • For self-propelled drive of the forme cylinder of each of the forme cylinder in addition to the direct drive is associated with a control device which drives the forme cylinder in the continuous printing operation synchronously with the respective blanket cylinder of the corresponding printing unit and thus synchronously with the main drive of the printing press.
  • the present invention is based on the problem to provide a novel printing press and a method for operating the same.
  • a correction variable which can be determined on the basis of an overlay function, the input value of which is the actual position value of the respective one, can be superimposed on the position actual value of the respective blanket cylinder to ensure aberration correction in multicolor printing at each printing unit involved in the multicolor printing Rubber cylinder is.
  • aberrations in multicolor printing can be corrected by varying development paths between the forme cylinder and the respective blanket cylinder of the printing units involved in multicolor printing. As a result, a distortion can be generated in the printed image, which corrects aberrations.
  • the aberrations can be geometrical errors or imaging errors.
  • Fig. 1 shows a section of a printing machine according to the invention in the field of a printing unit 10 thereof, wherein the printing unit 10 shown in FIG. 1, a counter-pressure cylinder 11, a rolling on the impression cylinder 11 blanket cylinder 12, a rolling on the blanket cylinder 12 form cylinder 13 and a in Fig. 1 not shown inking unit and dampening unit comprises, which cooperate with the forme cylinder 13 and transfer ink or dampening solution to a positioned on the forme cylinder 13 printing form.
  • ink is transferred to a blanket positioned on the blanket cylinder 12 and then to a printing material which is moved between the impression cylinder 11 and the blanket cylinder 12.
  • a sheet-fed printing machine which is used for printing sheet-like substrates, has a plurality of such printing units 10, which are arranged one behind the other in the transport direction of the substrate and preferably serve to print the substrate with different inks. Between adjacent printing units at least one transfer cylinder 14 is arranged to move the printing material from printing unit to printing unit and thus by the printing press. 1 shows such a transfer cylinder 14.
  • each control unit 15 is associated with each direct drive of a forme cylinder 13, which generates a steep signal 19 for the forme cylinder 13 on the basis of a control deviation 16 between a position actual value 17 of the forme cylinder 13 and a position desired value 18 for the forme cylinder 13.
  • the desired position 18 for the forme cylinder 13 is formed by the actual position value 20 of the blanket cylinder 12.
  • FIGS. 2 and 3 each show two embodiments of overlay functions 22a and 22b for determining the correction quantity 21, the overlay functions 22a and 22b according to FIGS. 2 and 3 differing only in the manner of their representation.
  • Fig. 2 on the horizontal axis of the actual position value 20 of the blanket cylinder of a printing unit and on the vertical axis a difference ⁇ between the actual position value 17 of the corresponding forme cylinder 13 and the actual position value 20 of the blanket cylinder 12 applied.
  • the actual position value 20 of the blanket cylinder 12 is on the horizontal axis and the position actual value 17 of the forme cylinder 13 is on the horizontal axis applied.
  • the overlay functions define desired differences between the actual position values of the forme cylinder and blanket cylinder.
  • both overlay functions 22a and 22b is shown in FIG. 2 and 3 at a position actual value 20 of the blanket cylinder 12 corresponding to a pressure start DA, a difference between the actual position value 17 of the forme cylinder 13 and the actual position value 20 of the blanket cylinder 12 zero , With the actual position value 20 of the blanket cylinder 12, which lie between the beginning of printing DA and a printing end DE, the difference between the position actual value 17 of the forme cylinder 13 and the actual position value 20 of the blanket cylinder 12 has a value deviating from zero. For actual position values 20 of the blanket cylinder 12, which lie between the beginning of printing DA and the end of printing DE, is printed in the corresponding printing unit. For position actual values 20 of the blanket cylinder 12, on the other hand, which lie between the end of printing DE and the start of printing DA, is not printed, since these actual position values 20 correspond to the tensioning channel of the blanket cylinder 12.
  • the overlay functions 22a and 22b in addition to the difference between the actual position values 20 and 17 of blanket cylinder 12 and forme cylinder 13, which is zero in the print start DA, determined by two additional support points, namely by a support point in Area of the center of pressure DM and a support point in the region of the printing end DE. Differences 23a, 24a and 23b, 24b between the actual position values 17 and 20 of the forme cylinder 13 and the corresponding blanket cylinder 20 of the respective printing unit 10 are respectively predetermined for these interpolation points. For actual position values 20 of the blanket cylinder 10, which lie between the support points DA, DM and DE, the respective differences between the actual position value 17 of the forme cylinder 13 and the actual position value 20 of the blanket cylinder 12 are determined by linear interpolation.
  • the overlay function 22a is characterized in that the difference between the actual position value 17 of the forme cylinder 13 and the position actual value for the entire pressure range between the beginning of the print DA and the end of the print DE 20 of the blanket cylinder 12 is greater than zero and therefore positive, whereby a print image extension can be achieved.
  • this difference is negative over the entire range between the beginning of the print DA and the end of the print DE, as a result of which a print image shortening can be realized.
  • the difference between the actual values 17 and 20 of the forme cylinder 13 and blanket cylinder 12 at the two interpolation points from the center of pressure DM and the end of printing DE is the same, from which it follows that this difference between the two interpolation points DM and DE is constant.
  • this deviation continuously increases starting from the value zero at the beginning of the pressure DA until, at the pressure center DM, it assumes the value predetermined at this interpolation point.
  • the overlay function 22b on the other hand, a continuous increase for the difference between the actual position values 17, 20 of the forme cylinder 13 and the blanket cylinder 20 can be established between the start of printing DA and the end of printing.
  • the above number of nodes for the overlay function is purely exemplary.
  • the number of support points for the overlay function and the amounts of differences between the actual position values 17 and 20 of forme cylinder 13 and blanket cylinder 12 can be freely defined or freely selected by an operator at these interpolation points.
  • Overlay functions for the participating in the multi-color printing units can either be defined in advance and used in the sense of a controller for determining the correction size, on the other hand, it is also possible that printed in multi-color print copies are recorded and evaluated, so as to control the overriding correction value determine. Furthermore, it can be provided that in the sense of an adaptive control overlay functions be continuously adjusted or modified during multicolor printing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Abstract

The machine has printing units (10), and each unit has an impression cylinder (11), rubber cylinders (12) and a form cylinder (13). A correction parameter overlies a position actual value (20) of the respective rubber cylinders for ensuring image error corrections in multi color printing at each printing unit, which takes part in the multicolor printing for the formation of a position desired value for the cylinder (13). The correction parameter is determined based on an overlapping function, whose input parameter is the actual value of the cylinder (12). An independent claim is also included for a method for operating the printing machine e.g. sheet fed printing machine.

Description

Die Erfindung betrifft eine Druckmaschine nach dem Oberbegriff des Anspruchs 1. Des Weiteren betrifft die Erfindung ein Verfahren zum Betreiben einer Druckmaschine nach dem Oberbegriff des Anspruchs 7.The invention relates to a printing press according to the preamble of claim 1. Furthermore, the invention relates to a method for operating a printing press according to the preamble of claim. 7

Aus dem Stand der Technik, nämlich aus der EP 0 812 683 A1 , ist eine Bogendruckmaschine mit mehreren Druckwerken bekannt, wobei jedes der Druckwerke einen Gegendruckzylinder, einen auf dem Gegendruckzylinder abrollenden Gummizylinder, einen auf dem Gummizylinder abrollenden Formzylinder sowie ein Farbwerk und ein Feuchtwerk umfasst. Bei der dort offenbarten Bogendruckmaschine werden die Gegendruckzylinder, die Gummizylinder, die Farbwerke sowie die Feuchtwerke der Druckwerke von einem Hauptantrieb angetrieben. Den Formzylindern der Druckwerke sind hingegen Eigenantriebe bzw. Direktantriebe zugeordnet, welche die Formzylinder entkoppelt vom Hauptantrieb der Druckmaschine eigenmotorisch antreiben. Unter Fortdruckbedingungen der Druckwerke werden die Gegendruckzylinder, die Gummizylinder, die Farbwerke sowie die Feuchtwerke der Druckwerke vom Hauptantrieb angetrieben, die Formzylinder der Druckwerke werden hingegen von den jeweiligen Direktantrieben angetrieben, und zwar synchronisiert zum Hauptantrieb. Zum eigenmotorischen Antrieb der Formzylinder ist jedem der Formzylinder neben dem Direktantrieb eine Regeleinrichtung zugeordnet, die den Formzylinder im Fortdruckbetrieb synchron zum jeweiligen Gummizylinder des entsprechenden Druckwerks und damit synchron zum Hauptantrieb der Druckmaschine antreibt.From the prior art, namely from the EP 0 812 683 A1 , A sheet-fed press with several printing units is known, wherein each of the printing units comprises a counter-pressure cylinder, a rolling on the impression cylinder blanket cylinder, a rolling on the blanket cylinder cylinder and an inking unit and a dampening unit. In the sheet-fed printing machine disclosed there, the impression cylinders, the blanket cylinders, the inking units and the dampening units of the printing units are driven by a main drive. The cylinders of the printing units, however, are associated with their own drives or direct drives, which drive the form cylinder decoupled from the main drive of the printing press eigenmotorisch. Under production conditions of the printing units, the impression cylinders, the blanket cylinders, the inking units and the dampening units of the printing units are driven by the main drive, while the forme cylinders of the printing units are driven by the respective direct drives, synchronized with the main drive. For self-propelled drive of the forme cylinder of each of the forme cylinder in addition to the direct drive is associated with a control device which drives the forme cylinder in the continuous printing operation synchronously with the respective blanket cylinder of the corresponding printing unit and thus synchronously with the main drive of the printing press.

Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zugrunde eine neuartige Druckmaschine sowie ein Verfahren zum Betreiben derselben zu schaffen.On this basis, the present invention is based on the problem to provide a novel printing press and a method for operating the same.

Dieses Problem wird durch eine Druckmaschine gemäß Anspruch 1 gelöst. Erfindungsgemäß ist zur Gewährleistung von Abbildungsfehlerkorrekturen im Mehrfarbendruck an jedem am Mehrfarbendruck beteiligten Druckwerk zur Bildung des Lage-Sollwerts für den Formzylinder dem Lage-Istwert des jeweiligen Gummizylinders eine Korrekturgröße überlagerbar, die auf Basis einer Überlagerungsfunktion bestimmbar ist, deren Eingangsgröße der Lage-Istwert des jeweiligen Gummizylinders ist.This problem is solved by a printing machine according to claim 1. According to the invention, a correction variable which can be determined on the basis of an overlay function, the input value of which is the actual position value of the respective one, can be superimposed on the position actual value of the respective blanket cylinder to ensure aberration correction in multicolor printing at each printing unit involved in the multicolor printing Rubber cylinder is.

Im Sinne der hier vorliegenden Erfindung können Abbildungsfehler im Mehrfarbendruck dadurch korrigiert werden, dass Abwicklungswege zwischen dem Formzylinder und dem jeweiligen Gummizylinder der am Mehrfarbendruck beteiligten Druckwerke variiert werden. Hierdurch kann im Druckbild eine Verzerrung erzeugt werden, die Abbildungsfehler korrigiert. Bei den Abbildungsfehlern kann es sich um geometrische Fehler oder auch um Bebilderungsfehler handeln.For the purposes of the present invention, aberrations in multicolor printing can be corrected by varying development paths between the forme cylinder and the respective blanket cylinder of the printing units involved in multicolor printing. As a result, a distortion can be generated in the printed image, which corrects aberrations. The aberrations can be geometrical errors or imaging errors.

Das erfindungemäße Verfahren zum Betreiben einer Druckmaschine ist im unabhängigen Anspruch 7 definiert.The erfindungemäße method for operating a printing press is defined in the independent claim 7.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ein Ausführungsbeispiel der Erfindung wird, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:

Fig. 1:
einen stark schematisierten Ausschnitt aus einer erfindungsgemäβen Druckmaschine im Bereich eines Druckwerks;
Fig. 2:
ein Diagramm zur Verdeutlichung der Erfindung; und
Fig. 3:
ein weiteres Diagramm zur Verdeutlichung der Erfindung.
Preferred embodiments of the invention will become apparent from the dependent claims and the description below. An embodiment of the invention will be described, without being limited thereto, with reference to the drawing. Showing:
Fig. 1:
a highly schematic section of a erfindungsgemäβen printing machine in the range of a printing unit;
Fig. 2:
a diagram for illustrating the invention; and
3:
another diagram to illustrate the invention.

Fig. 1 zeigt einen Ausschnitt aus einer erfindungsgemäßen Druckmaschine im Bereich eines Druckwerks 10 derselben, wobei das in Fig. 1 gezeigte Druckwerk 10 einen Gegendruckzylinder 11, einen auf dem Gegendruckzylinder 11 abrollenden Gummizylinder 12, einen auf den Gummizylinder 12 abrollenden Formzylinder 13 sowie ein in Fig. 1 nicht-dargestelltes Farbwerk sowie Feuchtwerk umfasst, die mit dem Formzylinder 13 zusammenwirken und Druckfarbe bzw. Feuchtmittel auf eine auf dem Formzylinder 13 positionierte Druckform übertragen. Ausgehend von einer auf dem Formzylinder 13 positionierten Druckform wird Druckfarbe auf ein auf dem Gummizylinder 12 positioniertes Gummituch und anschließend auf einen Bedruckstoff übertragen, der zwischen dem Gegendruckzylinder 11 und dem Gummizylinder 12 hindurch bewegt wird.Fig. 1 shows a section of a printing machine according to the invention in the field of a printing unit 10 thereof, wherein the printing unit 10 shown in FIG. 1, a counter-pressure cylinder 11, a rolling on the impression cylinder 11 blanket cylinder 12, a rolling on the blanket cylinder 12 form cylinder 13 and a in Fig. 1 not shown inking unit and dampening unit comprises, which cooperate with the forme cylinder 13 and transfer ink or dampening solution to a positioned on the forme cylinder 13 printing form. Starting from a printing block positioned on the forme cylinder 13, ink is transferred to a blanket positioned on the blanket cylinder 12 and then to a printing material which is moved between the impression cylinder 11 and the blanket cylinder 12.

Eine Bogendruckmaschine, die dem Bedrucken bogenförmiger Bedruckstoffe dient, verfügt über mehrere derartige Druckwerke 10, die in Transportrichtung des Bedruckstoffs hintereinander angeordnet sind und vorzugsweise dem Bedrucken des Bedruckstoffs mit unterschiedlichen Druckfarben dienen. Zwischen benachbarten Druckwerken ist dabei mindestens ein Transferzylinder 14 angeordnet, um den Bedruckstoff von Druckwerk zu Druckwerk und damit durch die Druckmaschine zu bewegen. Fig. 1 zeigt einen derartigen Transferzylinder 14.A sheet-fed printing machine, which is used for printing sheet-like substrates, has a plurality of such printing units 10, which are arranged one behind the other in the transport direction of the substrate and preferably serve to print the substrate with different inks. Between adjacent printing units at least one transfer cylinder 14 is arranged to move the printing material from printing unit to printing unit and thus by the printing press. 1 shows such a transfer cylinder 14.

Bei der erfindungsgemäßen Druckmaschine werden zumindest die Gegendruckzylinder 11 sowie Gummizylinder 12 der Druckwerke 10 der Druckmaschine von einem Hauptantrieb der Druckmaschine angetrieben. Den Formzylindern 13 ist hingegen ein nicht-dargestellter Direktantrieb zugeordnet, wobei jeder Formzylinder 13 unter Fortdruckbedingungen vom Direktantrieb synchron zum Gummizylinder 12 und damit synchron zum Hauptantrieb angetrieben werden kann. Hierzu ist jedem Direktantrieb eines Formzylinders 13 eine Regeleinrichtung 15 zugeordnet, die auf Basis einer Regelabweichung 16 zwischen einem Lage-Istwert 17 des Formzylinders 13 und einem Lage-Sollwert 18 für den Formzylinder 13 ein Steilsignal 19 für den Formzylinder 13 erzeugt.In the printing machine according to the invention, at least the counter-pressure cylinders 11 and blanket cylinders 12 of the printing units 10 of the printing press are driven by a main drive of the printing press. The forming cylinders 13, however, a non-illustrated direct drive is assigned, each mold cylinder 13 under continuous pressure conditions from the direct drive synchronously to the blanket cylinder 12 and thus can be driven synchronously to the main drive. For this purpose, each control unit 15 is associated with each direct drive of a forme cylinder 13, which generates a steep signal 19 for the forme cylinder 13 on the basis of a control deviation 16 between a position actual value 17 of the forme cylinder 13 and a position desired value 18 for the forme cylinder 13.

Unter Fortdruckbedingungen, in welchen der Formzylinder 13 synchron zum Gummizylinder 12 angetrieben werden soll, wird der Lage-Sollwert 18 für den Formzylinder 13 vom Lage-Istwert 20 des Gummizylinders 12 gebildet.Under continuous pressure conditions, in which the forme cylinder 13 is to be driven synchronously with the blanket cylinder 12, the desired position 18 for the forme cylinder 13 is formed by the actual position value 20 of the blanket cylinder 12.

Beim Mehrfarbendruck, so z. B. beim autotypischen Zusammendruck in welchem Teildruckbilder in den Druckfarben Cyan, Magenta, Gelb und Schwarz mit Hilfe unterschiedlicher Druckwerke 10 auf einen Bedruckstoff aufgetragen werden, können sich infolge von Abbildungsfehlern Verzerrungen im durch den Mehrfarbendruck hergestellten Druckerzeugnis ausbilden. Zur Gewährleistung von Abbildungsfehlerkorrekturen wird im Sinne der hier vorliegenden Erfindung vorgeschlagen, an zumindest einem, alternativ an jedem am Mehrfarbendruck beteiligten Druckwerk 10 zur Bildung des Lage-Sollwerts 18 für den Formzylinder 13 dem Lage-Istwert 20 des jeweiligen Gummizylinders 12 eine Korrekturgröße 21 zu überlagern. Die Korrekturgröße 21 wird auf Basis einer Überlagerungsfunktion 22 bestimmt, wobei eine Eingangsgröße der Überlagerungsfunktion 22 der Lage-Istwert 20 des jeweiligen Gummizylinders 12 ist. Durch die dem Lage-Istwert 20 des jeweiligen Gummizylinders 12 überlagerte Korrekturgröße 21 können Abwicklungswege vom Formzylinder 13 bezogen auf den Gummizylinder 12 des jeweiligen Druckwerks 10 variiert werden, um Abbildungsfehler im Mehrfarbendruck zu korrigieren bzw. zu kompensieren.When multi-color printing, such. B. in the autotypical se-print in which partial printing images in the inks cyan, magenta, yellow and black are applied by means of different printing units 10 on a substrate, can form due to aberrations distortion in the printed product produced by the multi-color printing. In order to ensure aberrations in the present invention, it is proposed to superpose a correction quantity 21 on at least one, alternatively on each printing unit 10 involved in the multi-color printing to form the desired position value 18 for the forme cylinder 13, the position actual value 20 of the respective blanket cylinder 12 , The correction quantity 21 is determined on the basis of an overlay function 22, wherein an input variable of the overlay function 22 is the actual position value 20 of the respective blanket cylinder 12. By the actual position 20 of the respective blanket cylinder 12 superimposed correction amount 21 Abwicklungswege can be varied from the forme cylinder 13 relative to the blanket cylinder 12 of the respective printing unit 10 to correct or compensate for aberrations in multi-color printing.

Fig. 2 und 3 zeigen jeweils zwei Ausführungsbeispiele von Überlagerungsfunktionen 22a und 22b zur Bestimmung der Korrekturgröße 21, wobei sich die Überlagerungsfunktionen 22a und 22b gemäß Fig. 2 und 3 lediglich durch die Art ihrer Darstellung unterscheiden. So ist in der Darstellung der Fig. 2 auf der horizontal verlaufenden Achse der Lage-Istwert 20 des Gummizylinders eines Druckwerks und auf der vertikal verlaufenden Achse eine Differenz Δ zwischen dem Lage-Istwert 17 des entsprechenden Formzylinders 13 und dem Lage-Istwert 20 des Gummizylinders 12 aufgetragen. In der Darstellung der Fig. 3 hingegen ist auf der horizontal verlaufenden Achse der Lage-Istwert 20 des Gummizylinders 12 und auf der horizontal verlaufenden Achse der Lage-Istwert 17 des Formzylinders 13 aufgetragen. Die Überlagerungsfunktionen definieren gewünschte Differenzen zwischen den Lage-Istwerten von Formzylinder und Gummizylinder.2 and 3 each show two embodiments of overlay functions 22a and 22b for determining the correction quantity 21, the overlay functions 22a and 22b according to FIGS. 2 and 3 differing only in the manner of their representation. Thus, in the illustration of Fig. 2 on the horizontal axis of the actual position value 20 of the blanket cylinder of a printing unit and on the vertical axis a difference Δ between the actual position value 17 of the corresponding forme cylinder 13 and the actual position value 20 of the blanket cylinder 12 applied. In the illustration of FIG. 3, on the other hand, the actual position value 20 of the blanket cylinder 12 is on the horizontal axis and the position actual value 17 of the forme cylinder 13 is on the horizontal axis applied. The overlay functions define desired differences between the actual position values of the forme cylinder and blanket cylinder.

Bei beiden Überlagerungsfunktionen 22a und 22b beträgt gemäß Fig. 2 und 3 bei einem Lage-Istwert 20 des Gummizylinders 12, der einem Druckanfang DA entspricht, eine Differenz zwischen dem Lage-Istwert 17 des Formzylinders 13 und dem Lage-Istwert 20 des Gummizylinders 12 Null. Bei Lage-Istwert 20 des Gummizylinders 12, die zwischen dem Druckanfang DA und einem Druckende DE liegen, weist die Differenz zwischen dem Lage-Istwert 17 des Formzylinders 13 und dem Lage-Istwert 20 des Gummizylinders 12 einen von null abweichenden Wert auf. Für Lage-Istwerte 20 des Gummizylinders 12, die zwischen dem Druckanfang DA und dem Druckende DE liegen, wird im entsprechenden Druckwerk gedruckt. Für Lage-Istwerte 20 des Gummizylinders 12 hingegen, die zwischen dem Druckende DE und dem Druckanfang DA liegen, wird nicht gedruckt, da diese Lage-Istwerte 20 dem Spannkanal des Gummizylinders 12 entsprechen.In both overlay functions 22a and 22b is shown in FIG. 2 and 3 at a position actual value 20 of the blanket cylinder 12 corresponding to a pressure start DA, a difference between the actual position value 17 of the forme cylinder 13 and the actual position value 20 of the blanket cylinder 12 zero , With the actual position value 20 of the blanket cylinder 12, which lie between the beginning of printing DA and a printing end DE, the difference between the position actual value 17 of the forme cylinder 13 and the actual position value 20 of the blanket cylinder 12 has a value deviating from zero. For actual position values 20 of the blanket cylinder 12, which lie between the beginning of printing DA and the end of printing DE, is printed in the corresponding printing unit. For position actual values 20 of the blanket cylinder 12, on the other hand, which lie between the end of printing DE and the start of printing DA, is not printed, since these actual position values 20 correspond to the tensioning channel of the blanket cylinder 12.

Im Ausführungsbeispiel der Fig. 2 und 3 werden die Überlagerungsfunktionen 22a und 22b neben der Differenz zwischen den Lage-IstWerten 20 und 17 von Gummizylinder 12 und Formzylinder 13, die im Druckanfang DA Null beträgt, durch zwei weitere Stützstellen bestimmt, nämlich durch eine Stützstelle im Bereich der Druckmitte DM sowie eine Stützstelle im Bereich des Druckendes DE. Für diese Stützstellen sind jeweils Differenzen 23a, 24a bzw. 23b, 24b zwischen den Lage-Istwerten 17 und 20 von Formzylinder 13 und entsprechendem Gummizylinder 20 des jeweiligen Druckwerks 10 vorgegeben. Für Lage-Istwerte 20 des Gummizylinders 10, die zwischen den Stützstellen DA, DM und DE liegen, werden die jeweiligen Differenzen zwischen dem Lage-Istwert 17 des Formzylinders 13 und dem Lage-Istwert 20 des Gummizylinders 12 durch lineare Interpolation bestimmt.In the embodiment of FIGS. 2 and 3, the overlay functions 22a and 22b, in addition to the difference between the actual position values 20 and 17 of blanket cylinder 12 and forme cylinder 13, which is zero in the print start DA, determined by two additional support points, namely by a support point in Area of the center of pressure DM and a support point in the region of the printing end DE. Differences 23a, 24a and 23b, 24b between the actual position values 17 and 20 of the forme cylinder 13 and the corresponding blanket cylinder 20 of the respective printing unit 10 are respectively predetermined for these interpolation points. For actual position values 20 of the blanket cylinder 10, which lie between the support points DA, DM and DE, the respective differences between the actual position value 17 of the forme cylinder 13 and the actual position value 20 of the blanket cylinder 12 are determined by linear interpolation.

Die Überlagerungsfunktion 22a ist dadurch gekennzeichnet, dass für den gesamten Druckbereich zwischen dem Druckanfang DA und dem Druckende DE die Differenz zwischen dem Lage-Istwert 17 des Formzylinders 13 und dem Lage-Istwert 20 des Gummizylinders 12 größer als Null und demnach positiv ist, wodurch eine Druckbildverlängerung erzielt werden kann.The overlay function 22a is characterized in that the difference between the actual position value 17 of the forme cylinder 13 and the position actual value for the entire pressure range between the beginning of the print DA and the end of the print DE 20 of the blanket cylinder 12 is greater than zero and therefore positive, whereby a print image extension can be achieved.

Für die Überlagerungsfunktion 22b hingegen ist diese Differenz über den gesamten Bereich zwischen Druckanfang DA und Druckende DE negativ, wodurch eine Druckbildverkürzung realisiert werden kann.For the overlay function 22b, on the other hand, this difference is negative over the entire range between the beginning of the print DA and the end of the print DE, as a result of which a print image shortening can be realized.

Bei der Überlagerungsfunktion 22a ist die Differenz zwischen den Ist-Werten 17 und 20 von Formzylinder 13 und Gummizylinder 12 an den beiden Stützstellen von Druckmitte DM und Druckende DE gleich groß, woraus folgt, dass diese Differenz zwischen den beiden Stützstellen DM und DE konstant ist. Zwischen Druckanfang DA und Druckmitte DM nimmt diese Abweichung ausgehend vom Wert Null beim Druckanfang DA kontinuierlich zu, bis sie bei der Druckmitte DM den an dieser Stützstelle vorgegebenen Wert einnimmt. Für die Überlagerungsfunktion 22b hingegen ist zwischen dem Druckanfang DA und dem Druckende ein kontinuierlicher Anstieg für die Differenz zwischen den Lage-Istwerten 17, 20 von Formzylinder 13 und Gummizylinder 20 festzustellen.In the case of the overlay function 22a, the difference between the actual values 17 and 20 of the forme cylinder 13 and blanket cylinder 12 at the two interpolation points from the center of pressure DM and the end of printing DE is the same, from which it follows that this difference between the two interpolation points DM and DE is constant. Between the beginning of the pressure DA and the center of the pressure DM, this deviation continuously increases starting from the value zero at the beginning of the pressure DA until, at the pressure center DM, it assumes the value predetermined at this interpolation point. For the overlay function 22b, on the other hand, a continuous increase for the difference between the actual position values 17, 20 of the forme cylinder 13 and the blanket cylinder 20 can be established between the start of printing DA and the end of printing.

Die obige Anzahl an Stützstellen für die Überlagerungsfunktion ist rein exemplarisch. So können die Anzahl der Stützstellen für die Überlagerungsfunktion sowie die Beträge der Differenzen zwischen den Lage-Istwerten 17 und 20 von Formzylinder 13 und Gummizylinder 12 an diesen Stützstellen von einem Bediener frei definiert bzw. frei gewählt werden.The above number of nodes for the overlay function is purely exemplary. Thus, the number of support points for the overlay function and the amounts of differences between the actual position values 17 and 20 of forme cylinder 13 and blanket cylinder 12 can be freely defined or freely selected by an operator at these interpolation points.

Überlagerungsfunktionen für die am Mehrfarbendruck beteiligten Druckwerke können entweder vorab definiert und im Sinne einer Steuerung zur Bestimmung der Korrekturgröße verwendet werden, andererseits ist es auch möglich, dass beim Mehrfarbendruck gedruckte Druckexemplare erfasst und bewertet werden, um so im Sinne einer Regelung die zu überlagernde Korrekturgröße zu ermitteln. Weiterhin kann vorgesehen sein, dass im Sinne einer adaptiven Regelung Überlagerungsfunktionen während des Mehrfarbendrucks fortlaufend angepasst bzw. modifiziert werden.Overlay functions for the participating in the multi-color printing units can either be defined in advance and used in the sense of a controller for determining the correction size, on the other hand, it is also possible that printed in multi-color print copies are recorded and evaluated, so as to control the overriding correction value determine. Furthermore, it can be provided that in the sense of an adaptive control overlay functions be continuously adjusted or modified during multicolor printing.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Druckwerkprinting unit
1111
GegendruckzylinderImpression cylinder
1212
Gummizylinderrubber cylinder
1313
Formzylinderform cylinder
1414
Transferzylindertransfer cylinder
1515
Regeleinrichtungcontrol device
1616
Regelabweichungdeviation
1717
Lage-Istwert FormzylinderActual position value cylinder
1818
Lage-Sollwert FormzylinderPosition setpoint for forme cylinder
1919
Stellsignalactuating signal
2020
Lage-Istwert GummizylinderActual position value rubber cylinder
2121
Korrekturgrößecorrection variable
2222
ÜberlagerungsfunktionOverlay function
22a22a
ÜberlagerungsfunktionOverlay function
22b22b
ÜberlagerungsfunktionOverlay function
23a23a
Differenzdifference
23b23b
Differenzdifference
24a24a
Differenzdifference
24b24b
Differenzdifference

Claims (10)

Druckmaschine, insbesondere Bogendruckmaschine, mit mehreren Druckwerken (10), wobei jedes Druckwerk einen Gegendruckzylinder (11), einen auf dem Gegendruckzylinder abrollenden Gummizylinder (12), einen auf dem Gummizylinder abrollenden Formzylinder (13), ein Farbwerk und vorzugsweise ein Feuchtwerk umfasst, wobei zumindest der Gegendruckzylinder (11) und der Gummizylinder (12) jedes Druckwerks von einem Hauptantrieb der Druckmaschine antreibbar sind, wobei dem Formzylinder (13) jedes Druckwerks zum eigenmotorischen Antrieb desselben ein Direktantrieb und eine Regeleinrichtung (15) zugeordnet ist, die den Formzylinder (13) im Fortdruckbetrieb derart synchron zum Gummizylinder (12) des jeweiligen Druckwerks antreibt, dass der Regeleinrichtung (15) jedes Formzylinders (13) als Lage-Sollwert (18) ein Lage-Istwert (20) des jeweiligen Gummizylinders (12) zuführbar ist, dadurch gekennzeichnet, dass zur Gewährleistung von Abbildungsfehlerkorrekturen im Mehrfarbendruck an jedem am Mehrfarbendruck beteiligten Druckwerk (10) zur Bildung des Lage-Sollwert (18) für den Formzylinder (13) dem Lage-Istwert (20) des jeweiligen Gummizylinders (12) eine Korrekturgröße (21) überlagerbar ist, die auf Basis einer Überlagerungsfunktion (22, 22a, 22b) bestimmbar ist, deren Eingangsgröße der Lage-Istwert (20) des jeweiligen Gummizylinders (12) ist.Printing machine, in particular sheet-fed printing press, with a plurality of printing units (10), wherein each printing unit comprises an impression cylinder (11), a rubber cylinder (12) rolling on the impression cylinder, a printing cylinder (13) rolling on the blanket cylinder, an inking unit and preferably a dampening unit, wherein at least the counter-pressure cylinder (11) and the blanket cylinder (12) of each printing unit are drivable by a main drive of the printing press, wherein the form cylinder (13) of each printing unit for self-propulsion of the same a direct drive and a control device (15) is assigned to the forme cylinder (13 ) in the continuous printing operation so synchronously to the blanket cylinder (12) of the respective printing unit drives, that the control device (15) of each forme cylinder (13) as a position setpoint (18) a position actual value (20) of the respective blanket cylinder (12) can be fed, characterized characterized in that to ensure aberration corrections in multi-color printing at each of the multi-color Pressure-related printing unit (10) for forming the position setpoint (18) for the forme cylinder (13) the position actual value (20) of the respective blanket cylinder (12) a correction value (21) is superimposed, based on a superposition function (22, 22a, 22b) can be determined, whose input variable is the actual position value (20) of the respective blanket cylinder (12). Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Überlagerungsfunktion (22, 22a, 22b) die Korrekturgröße (21) derart bestimmt, dass bei einem Lage-Istwert (20) des Gummizylinders (12), der einem Druckanfang entspricht, eine Differenz zwischen dem Lage-Istwert (17) des Formzylinders (13) und dem Lage-Istwert (20) des Gummizylinders (12) Null beträgt, wohingegen bei Lage-Istwerten (20) des Gummizylinders (12), die zwischen dem Druckanfang (DA) und einem Druckende (DE) liegen, die Differenz zwischen dem Lage-Istwert (17) des Formzylinders (13) und dem Lage-Istwert (20) des Gummizylinders (12) einen von Null abweichenden Wert aufweist.Printing machine according to claim 1, characterized in that the overlay function (22, 22a, 22b) determines the correction variable (21) such that at a position actual value (20) of the blanket cylinder (12) corresponding to a pressure beginning, a difference between the Position actual value (17) of the forme cylinder (13) and the actual position value (20) of the blanket cylinder (12) is zero, whereas at actual position values (20) of the blanket cylinder (12) between the pressure beginning (DA) and a Druckende (DE) lie, the difference between the position actual value (17) of the forme cylinder (13) and the actual position value (20) of the blanket cylinder (12) has a value deviating from zero. Druckmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Überlagerungsfunktion durch mindestens zwei Stützstellen (DA, DM, DE) definiert ist, wobei jede Stützstelle für einen definierten Lage-Istwert (20) des Gummizylinders (12) eine Differenz zwischen dem Lage-Istwert (17) des Formzylinders (13) und dem Lage-Istwert (20) des Gummizylinders vorgibt.Printing machine according to claim 1 or 2, characterized in that the overlay function is defined by at least two support points (DA, DM, DE), each support point for a defined actual position value (20) of the blanket cylinder (12) a difference between the position Actual value (17) of the forme cylinder (13) and the actual position value (20) of the blanket cylinder pretends. Druckmaschine nach Anspruch 3, dadurch gekennzeichnet, dass für Lage-Istwerte (20), die zwischen benachbarten Stützstellen liegen, die Differenz zwischen dem Lage-Istwert (17) des Formzylinders (13) und dem Lage-Istwert (20) des Gummizylinders (12) durch Interpolation bestimmbar ist.Printing machine according to claim 3, characterized in that for position actual values (20) lying between adjacent support points, the difference between the actual position value (17) of the forme cylinder (13) and the actual position value (20) of the blanket cylinder (12 ) can be determined by interpolation. Druckmaschine nach einem oder mehreren der Ansprüche 3 bis 4, dadurch gekennzeichnet, dass die Überlagerungsfunktion (22a, 22b) neben dem Druckanfang (DA) durch zwei weitere Stützstellen definiert ist, wobei eine erste Stützstelle bei einem Lage-Istwert (20) des Gummizylinders (12), der einer Druckmitte (DM) entspricht, eine erste Differenz zwischen den Lage-Istwerten von Formzylinder und Gummizylinder vorgibt, und wobei eine zweite Stützstelle bei einem Lage-Istwert (20) des Gummizylinders (12), der einem Druckende (DE) entspricht, eine zweite Differenz zwischen den Lage-Istwerten von Formzylinder und Gummizylinder vorgibt, und wobei für Lage-Istwerte, die einerseits zwischen dem Druckanfang (DA) und der Druckmitte (DM) und anderseits zwischen der Druckmitte (DM) und dem Druckende (DE) liegen, die Differenz zwischen dem Lage-Istwert des Formzylinders und dem Lage-Istwert des Gummizylinders durch Interpolation bestimmbar sind.Printing machine according to one or more of claims 3 to 4, characterized in that the overlay function (22a, 22b) is defined next to the print start (DA) by two further support points, wherein a first support point at a position actual value (20) of the blanket cylinder ( 12), which corresponds to a center of pressure (DM), specifies a first difference between the actual position values of the forme cylinder and blanket cylinder, and wherein a second interpolation point at a position actual value (20) of the blanket cylinder (12), the one end of printing (DE) corresponds, a second difference between the actual position values of forme cylinder and blanket cylinder, and wherein for position actual values, on the one hand between the pressure beginning (DA) and the center of pressure (DM) and on the other hand between the pressure center (DM) and the pressure end (DE ), the difference between the actual position value of the forme cylinder and the actual position value of the blanket cylinder can be determined by interpolation. Druckmaschine nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Interpolation eine lineare Interpolation ist.Printing machine according to claim 4 or 5, characterized in that the interpolation is a linear interpolation. Verfahren zum Betreiben einer Druckmaschine, insbesondere einer Bogendruckmaschine, wobei die Druckmaschine mehrere Druckwerke mit jeweils einem Gegendruckzylinder, einem auf dem Gegendruckzylinder abrollenden Gummizylinder, einem auf dem Gummizylinder abrollenden Formzylinder, einem Farbwerk und vorzugsweise einem Feuchtwerk umfasst, wobei zumindest der Gegendruckzylinder und der Gummizylinder jedes Druckwerks von einem Hauptantrieb der Druckmaschine angetrieben werden, wobei der Formzylinder jedes Druckwerks über einen demselben zugeordneten Direktantrieb mit Regeleinrichtung im Fortdruckbetrieb derart eigenmotorisch und synchron zum Gummizylinder des jeweiligen Druckwerks angetrieben wird, dass der Regeleinrichtung jedes Formzylinders als Lage-Sollwert ein Lage-Istwert des jeweiligen Gummizylinders zugeführt wird, dadurch gekennzeichnet, dass zur Gewährleistung von Abbildungsfehlerkorrekturen im Mehrfarbendruck an zumindest einem am Mehrfarbendruck beteiligten Druckwerk zur Bildung des Lage-Sollwert für den Formzylinder dem Lage-Istwert des jeweiligen Gummizylinders eine Korrekturgröße überlagert wird, die auf Basis einer Überlagerungsfunktion bestimmt wird, deren Eingangsgröße der Lage-Istwert des jeweiligen Gummizylinders ist.Method for operating a printing machine, in particular a sheet-fed printing machine, wherein the printing press comprises a plurality of printing units, each with a counter-pressure cylinder, a rolling on the impression cylinder rubber cylinder, a rolling on the blanket cylinder form cylinder, an inking unit and preferably a dampening unit, wherein at least the impression cylinder and the blanket cylinder each Printing unit driven by a main drive of the printing press, wherein the form cylinder of each printing unit is driven via a same associated direct drive with control device in the continuous printing mode such eigenmotoric and synchronous to the blanket cylinder of the respective printing unit that the controller of each forme cylinder as a position setpoint a position actual value of the respective Rubber cylinder is supplied, characterized in that to ensure aberrations in the multi-color printing on at least one participating in the multi-color printing unit for Bildu ng the position setpoint for the forme cylinder, a correction value is superimposed on the actual position value of the respective blanket cylinder, which is determined on the basis of a superimposition function whose input variable is the actual position value of the respective blanket cylinder. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass die Korrekturgröße derart bestimmt wird, dass bei einem Lage-Istwert des Gummizylinders, der einem Druckanfang entspricht, eine Differenz zwischen dem Lage-Istwert des Formzylinders und dem Lage-Istwert des Gummizylinders Null beträgt, wohingegen bei Lage-Istwerten des Gummizylinders, die zwischen dem Druckanfang und einem Druckende liegen, die Differenz zwischen dem Lage-Istwert des Formzylinders und dem Lage-Istwert des Gummizylinders einen von Null abweichenden Wert aufweist.A method according to claim 7, characterized in that the correction value is determined such that at a position value of the blanket cylinder, which corresponds to a print start, a difference between the actual position value of the forme cylinder and the actual position value of the blanket cylinder is zero, whereas in Actual position values of the blanket cylinder, which lie between the start of printing and a printing end, the difference between the actual position value of the forme cylinder and the position actual value of the blanket cylinder has a value deviating from zero. Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die Überlagerungsfunktion durch mindestens zwei Stützstellen definiert wird, wobei jede Stützstelle für einen definierten Lage-Istwert des Gummizylinders eine Differenz zwischen dem Lage-Istwert des Formzylinders und dem Lage-Istwert des Gummizylinders vorgibt, und wobei für Lage-Istwerte, die zwischen benachbarten Stützstellen liegen, die Differenz zwischen dem Lage-Istwert des Formzylinders und dem Lage-Istwert des Gummizylinders durch vorzugsweise lineare Interpolation bestimmt wird.A method according to claim 7 or 8, characterized in that the overlay function is defined by at least two support points, each support point for a defined actual position value of the blanket cylinder specifies a difference between the actual position value of the forme cylinder and the actual position value of the blanket cylinder, and wherein for position actual values, which lie between adjacent support points, the difference between the actual position value of the forme cylinder and the actual position value of the blanket cylinder is determined by preferably linear interpolation. Verfahren nach einem oder mehreren der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass die Korrekturgröße im Sinne einer vorzugsweise adaptiven Regelung ermittelt wird.Method according to one or more of claims 7 to 9, characterized in that the correction variable is determined in the sense of a preferably adaptive control.
EP07003634.8A 2006-03-11 2007-02-22 Method for operating a printing press Revoked EP1834772B1 (en)

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