EP2520430A1 - Method for detecting configuration errors in a sheet printing device - Google Patents
Method for detecting configuration errors in a sheet printing device Download PDFInfo
- Publication number
- EP2520430A1 EP2520430A1 EP12165476A EP12165476A EP2520430A1 EP 2520430 A1 EP2520430 A1 EP 2520430A1 EP 12165476 A EP12165476 A EP 12165476A EP 12165476 A EP12165476 A EP 12165476A EP 2520430 A1 EP2520430 A1 EP 2520430A1
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- European Patent Office
- Prior art keywords
- sheet
- printing
- contour
- cylinder
- gripper
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Classifications
-
- 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
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
- B41F21/12—Adjusting leading edges, e.g. front stops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
- B41F21/14—Adjusting lateral edges, e.g. side stops
Definitions
- the invention relates to a method for determining setting errors in a sheet-fed press, in which the geometry of the continuous sheet is recorded by an imaging system and compared for evaluation with desired geometries.
- the DE 103 12 162 A1 as well as the EP 1 155 854 A2 are means for monitoring the sheet travel described with which the sheet travel is spatially monitored by cameras that look laterally on the sheet edge and thereby determine, for example, whether the continuous sheet remains within predetermined boundary positions at a distance from the cylinder surface and the sheet guiding devices.
- These monitoring devices are thus designed specifically for the one purpose they serve, namely to determine the spatial position of the sheet, and can not be used to determine other setting errors z. B. be used on the gripper bar.
- a moving mitbewegter with the sensor sensor detects the position and inclination of the sheet in space and in the US 7,481,429 B2 a signal processing electronics for sheet sensors is described.
- misadjustments mentioned can be obtained without pressure plates which have been specially used with measuring marks for measuring the sheet travel. Furthermore, a camera already included in the printing machine or a line sensor can be used to determine setting errors of the machine, which is primarily intended for other purposes, for example, for the color control or the quality assurance of the sheet.
- the inventive method is carried out with relatively little effort, because it is essentially only a camera needed, which is attached to designated locations on the respective printing units and the signal is connected to the control of the printing press.
- the setting errors in the relevant printing unit can then be identified from the measured geometric deviations. It is not even necessary to print the sheet with an image or patterns for this, but it is sufficient to run white unprinted sheets possibly at different speeds through the machine.
- FIG. 1 schematically a sheet-fed printing machine 5 is shown, the printing units 3 and 4, wherein it can also be a coating unit in the printing unit 4.
- the printing press 5 has even more printing units for the various colors to be printed, which are not shown for reasons of simplicity in the figure.
- the printed by the printing machine sheets 7 are stored in the boom 6 at the end of the printing machine 5 on a stack.
- a camera 2 is mounted, which detects the image resting on the impression cylinder 13 of the printing unit 3 sheet while it is transported by the impression cylinder 13 in the gripper closure in the direction of the next printing unit 4 and taken over by a transferter 15 and the impression cylinder 14 of the printing unit or coating unit 4 is transferred.
- the camera 2 is used to inspect the printed image on the sheet and recorded at intervals of the frame rate each strip-shaped sections over the entire width of the sheet, which are assembled in sheet travel direction to form an image of the entire sheet.
- a spectral line sensor 1 is installed, via which the spectral remission of the color printed sheet is detected for the purpose of ink fountain control.
- the sensor line 1 extends either over the entire sheet width or consists of shorter individual lines, which are set side by side or can be moved to specific color zones.
- Both imaging systems, the camera 2 and the sensor line 1, are connected to the controller 8 of the printing press 5. Their signals are subjected there by a transmitter various types of filtering and arithmetic operations, before the result of the computer contained in the controller 8 in control and control signals for quality assurance on the one hand and for the ink zone control on the other hand prepared and on the screen 9 optionally the operator of the printing press is shown.
- the camera 2 and the sensor line 1 it is now also possible to detect the contours of the printed sheet passing under the camera 2 or the sensor line 1.
- the signals of the pixels of the camera 2 or of the line sensor 1, which lie on the edge of the image field, are required for imaging the sheet side edge.
- the signals that the camera 2 and the sensor line 1 provides when this edge is running straight through the image field which is achieved by a suitable synchronization of camera or sensor with the so-called machine angle, ie the angular position of the impression cylinders 13 and 14.
- This machine angle is known to the controller 8, which communicates with one or more encoders in the gear train of the printing press.
- FIG. 2 The typical contour 19 of the edges of a sheet passing through the printing machine 5, as seen by either the camera 2 or the sensor 1, is shown.
- the sharp, high-contrast outline is obtained because the image signals were subjected to edge filtering by a Sobel filter on the one hand and to a contrast enhancement threshold operation on the other hand.
- the contours of the 18 grippers In the area of the sheet leading edge can be seen the contours of the 18 grippers, with which the continuous sheet is held on the impression cylinder 13 and 14 respectively.
- Outline 19 shown now has some irregularities compared to an ideal rectangle, which are explained in more detail in the following figures.
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- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Ermittlung von Einstellfehlern in einer Bogendruckmaschine, bei dem die Geometrie des durchlaufenden Druckbogens von einem bildgebenden System aufgenommen und zur Auswertung mit Soll-Geometrien verglichen wird.The invention relates to a method for determining setting errors in a sheet-fed press, in which the geometry of the continuous sheet is recorded by an imaging system and compared for evaluation with desired geometries.
Es ist bereits seit geraumer Zeit bekannt, in den Druckwerken von Bogendruckmaschinen bildgebende Systeme wie z. B. Videokameras oder Zeilensensoren vorzusehen, von denen Bilder der darunter hindurch laufenden Druckbögen inline gewonnen und für verschiedenste Zwecke ausgewertet werden. Hauptanwendungsfälle hier sind zum einen die Farbregelung bzw. Steuerung der Farbgebung aufgrund festgestellter spektraler Farbdifferenzen im Sujet zum Soll-Bild, sowie zum anderen das Detektieren von Fehlern im Druckbild, wie z. B. Butzen oder Kratzer. In diesem zweiten Falle wird das bildgebende System zur Qualitätssicherung benutzt, um die Bögen oder Teile davon zu identifizieren, die nicht verkaufbar und gegebenenfalls auszusondern sind. Auch hierbei wird das Sujet mit einer fehlerfreien Referenz verglichen.It has been known for some time, in the printing of sheet-fed printing machines imaging systems such. As video cameras or line sensors to provide, of which images of the undergoing sheets are obtained inline and evaluated for various purposes. Main applications here are on the one hand, the color control or color control due to detected spectral color differences in the subject to the target image, as well as the detection of errors in the printed image, such. B. slugs or scratches. In this second case, the quality assurance imaging system is used to identify the sheets or portions thereof that are unsortable and possibly to be discarded. Again, the subject is compared with an error-free reference.
Aus der
Bei diesem Verfahren werden spezielle Druckplatten benötigt und es muss Papier bedruckt werden, um die beim Bogenlauf auftretenden Fehler durch Auswertung der bedruckten Bögen zu erkennen.Special printing plates are required in this process and paper must be printed to detect the errors that occur during sheet travel by evaluating the printed sheets.
In der
Es ist die Aufgabe der Erfindung ein Verfahren anzugeben, mit dem auf einfache Weise mit einer im Wesentlichen senkrecht zur Bogenfläche ausgerichteten bildgebenden System Einstellfehler in den Druckwerken einer Bogendruckmaschine erkannt werden können.It is the object of the invention to specify a method with which adjustment errors in the printing units of a sheet-fed printing machine can be detected in a simple manner with an imaging system oriented substantially perpendicular to the sheet surface.
Diese Aufgabe wird mit den im Anspruch 1 angegebenen Maßnahmen gelöst.This object is achieved with the measures specified in
Gemäß der Erfindung werden also im Gegensatz zu den bekannten Lösungen von dem auf die Bogenfläche gerichteten bildgebenden System die sichtbaren Konturen der Bogenränder zumindest teilweise erfasst und die Abweichungen der Bogenkonturen oder Konturstücke zu den Soll-Konturen des idealerweise rechteckigen Bogens gemessen. Aus diesen gemessenen Abweichungen kann dann mindestens auf einen der folgenden Einstellungsfehler der Maschine geschlossen werden:
- 1. Eine fehlerhafte Bogenübergabe aufgrund falscher Einstellung der den Bogen transportierenden Greiferbrücke,
- 2. auf das Abheben des Bogens vom Gegendruckzylinder aufgrund falscher Einstellung der Blasluft für die Bogenführung, und
- 3. auf einen fehlerhaften Radius des Gegendruckzylinders, über dem das bildgebende System angebracht ist, z. B. aufgrund falsch gewählter Zylinderaufzüge/Unterlegungen.
- 1. A faulty sheet transfer due to incorrect setting of the arch-transporting gripper bridge,
- 2. On the lifting of the sheet from the impression cylinder due to incorrect adjustment of the blowing air for the bowing, and
- 3. on a defective radius of the impression cylinder over which the imaging system is mounted, for. B. due to incorrectly selected cylinder lifts / underlays.
Die genannten Fehleinstellungen können dabei gewonnen werden, ohne dass speziell mit Messmarken für die Vermessung des Bogenlaufs belichtete Druckplatten zum Einsatz kommen. Des Weiteren kann zur Ermittlung von Einstellfehlern der Maschine eine bereits in die Druckmaschine enthaltene Kamera oder ein Zeilensensor verwendet werden, der primär für andere Zwecke vorgesehen ist, beispielsweise für die Farbregelung oder die Qualitätssicherung des Bogens.The misadjustments mentioned can be obtained without pressure plates which have been specially used with measuring marks for measuring the sheet travel. Furthermore, a camera already included in the printing machine or a line sensor can be used to determine setting errors of the machine, which is primarily intended for other purposes, for example, for the color control or the quality assurance of the sheet.
Das erfindungsgemäße Verfahren ist mit einem verhältnismäßig geringen Aufwand durchzuführen, denn es wird im Wesentlichen nur eine Kamera benötigt, die an dafür vorgesehenen Stellen an den jeweiligen Druckwerken befestigt wird und dessen Signal mit der Steuerung der Druckmaschine verbunden wird. Über ein entsprechendes Diagnoseprogramm lassen sich dann aus den gemessenen Geometrieabweichungen die Einstellfehler in dem betreffenden Druckwerk identifizieren. Es ist nicht einmal erforderlich, hierfür den Bogen mit einem Bild oder mit Mustern zu bedrucken, vielmehr genügt es, weiße unbedruckte Bogen gegebenenfalls bei unterschiedlicher Geschwindigkeit durch die Maschine laufen zu lassen.The inventive method is carried out with relatively little effort, because it is essentially only a camera needed, which is attached to designated locations on the respective printing units and the signal is connected to the control of the printing press. By means of a corresponding diagnostic program, the setting errors in the relevant printing unit can then be identified from the measured geometric deviations. It is not even necessary to print the sheet with an image or patterns for this, but it is sufficient to run white unprinted sheets possibly at different speeds through the machine.
Zweckmäßig ist es, bei der Auswertung der Konturen des Bogenrandes speziell ausgewählte Abschnitte der Bogenkontur heranzuziehen, in denen sich die eingangs genannten Maschinenfehler niederschlagen. So können aus den Abständen der Konturstücke der Bogenvorderkante zwischen den Greifern zur Greiferhinterkante auf falsche Greiferöffnungszeitpunkte oder zu hoch oder zu tief liegende Greiferbrücken geschlossen werden. In ähnlicher Weise kann aus den Abweichungen der Konturstücke der Bogenvorderkante von einer Geraden auf Fehleinstellungen zwischen der Bogenankunftszeit und den Greiferschließzeiten geschlossen werden. Sodann kann der hintere Teil der seitlichen Bogenränder für eine Auswertung herangezogen werden, wobei aus einer scheinbaren Verbreiterung des Bogens zunehmend von dem Zeitpunkt an, an dem der Bogen den Druckspalt verlässt, auf das Ausmaß des Abhebens des Druckbogens vom Druckzylinder geschlossen wird. Des Weiteren äußert sich ein falscher Zylinderdurchmesser, beispielsweise hervorgerufen durch ungleichmäßige, zu dicke oder zu dünne Unterlegungen, in einem seitlichen Versatz der Kontur der Bogenseitenkanten und zwar zu dem Zeitpunkt, da die Bogenhinterkante den Druckspalt verlässt.It is expedient to use specially selected sections of the sheet contour in the evaluation of the contours of the sheet edge, in which the aforementioned machine errors are reflected. Thus, from the distances of the contour pieces of the sheet leading edge between the grippers to the gripper trailing edge on false gripper opening times or too high or too low lying gripper bridges can be concluded. Similarly, it can be concluded from the deviations of the contour pieces of the sheet leading edge of a straight line on incorrect settings between the Bogenankunftszeit and the gripper closing times. Then, the rear part of the lateral sheet edges can be used for an evaluation, wherein from an apparent broadening of the sheet increasingly from the time at which the sheet leaves the printing nip on the extent of lifting of the sheet closed by the pressure cylinder. Furthermore, a wrong cylinder diameter, caused for example by uneven, too thick or too thin underlays, manifests itself in a lateral offset of the contour of the sheet side edges at the time when the sheet trailing edge leaves the printing nip.
Für die Verbesserung der Auswertesignale ist es zweckmäßig, sie vor der Auswertung einer digitalen Kantenfilterung und gegebenenfalls Schwellwertoperationen zur Kontrastanhebung zu unterziehen.For the improvement of the evaluation signals, it is expedient to subject them before the evaluation of a digital edge filtering and optionally threshold value operations for contrast enhancement.
Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der
Figur 1- zeigt die Prinzipskizze einer Druckmaschine mit einem bildgebenden System für die Inlineauswertung von Druckbögen während eines Druckauftrages.
- Figur 2
- zeigt das von der Kamera 2 aufgenommene Abbild des Bogens nach Kantenfilterung und Kontrastverbesserung.
Figur 3 und 4- zeigen vergrößerte Ausschnitte der Kontur der Bogenvorderkante bei unterschiedlichen Maschinenzuständen.
Figur 5- zeigt vergrößerte Ausschnitte der aufgenommenen Kontur der Bogenseitenkante im Bereich der Bogenhinterkante.
Figur 6- zeigt vergrößerte Ausschnitte der aufgenommenen Kontur der linken und rechten Bogenseitenkante zum Zeitpunkt, da die Bogenhinterkante den Druckspalt verlässt.
- FIG. 1
- shows the schematic diagram of a printing machine with an imaging system for the inline evaluation of sheets during a print job.
- FIG. 2
- shows the captured by the camera 2 image of the arc after edge filtering and contrast enhancement.
- FIGS. 3 and 4
- show enlarged sections of the contour of the sheet leading edge at different machine conditions.
- FIG. 5
- shows enlarged sections of the recorded contour of the sheet side edge in the region of the sheet trailing edge.
- FIG. 6
- shows enlarged sections of the recorded contour of the left and right sheet side edge at the time when the sheet trailing edge leaves the printing nip.
In
Am Druckwerk 3 ist eine Kamera 2 angebracht, die den auf dem Gegendruckzylinder 13 des Druckwerks 3 aufliegenden Bogen bildmäßig erfasst, während er von dem Gegendruckzylinder 13 im Greiferschluss in Richtung auf das nächste Druckwerk 4 befördert wird und von einem Transferter 15 übernommen und an den Gegendruckzylinder 14 des Druckwerks oder Lackwerks 4 übergeben wird. Die Kamera 2 dient der Inspektion des auf den Bogen aufgedruckten Bildes und erfasst im Takte der Bildwechselfrequenz jeweils streifenförmige Abschnitte über die gesamte Breite des Bogens, die in Bogenlaufrichtung zu einem Bild des gesamten Bogens zusammengesetzt werden.At the
Im Druckwerk 4 ist ein spektraler Zeilensensor 1 eingebaut, über den die spektrale Remission des farbig bedruckten Bogens zum Zwecke der Farbzonenregelung erfasst wird. Dazu erstreckt sich die Sensorzeile 1 entweder über die gesamte Bogenbreite oder besteht aus kürzeren Einzelzeilen, die nebeneinander gesetzt sind oder zu bestimmten Farbzonen hin verfahrbar sind.In the printing unit 4, a
Beide bildgebenden Systeme, die Kamera 2 sowie die Sensorzeile 1, sind mit der Steuerung 8 der Druckmaschine 5 verbunden. Ihre Signale werden dort von einer Auswerteelektronik verschiedenartigen Filterungen und arithmetischen Operationen unterzogen, bevor das Ergebnis von dem in der Steuerung 8 enthaltenen Rechner in Steuer-und Regelsignale für die Qualitätssicherung einerseits und für die Farbzonensteuerung andererseits aufbereitet und auf dem Bildschirm 9 wahlweise dem Bediener der Druckmaschine angezeigt wird.Both imaging systems, the camera 2 and the
Mit jedem der beiden bildgebenden Systeme, der Kamera 2 und der Sensorzeile 1, lassen sich nun auch die Konturen des unter der Kamera 2 bzw. der Sensorzeile 1 hindurchlaufenden Druckbogens erkennen. Hierbei werden zur Abbildung der Bogenseitenkante nur die Signale der Pixel der Kamera 2 bzw. des Zeilensensors 1 benötigt, die am Rande des Bildfelds liegen. Zur Abbildung der Vorder- und Hinterkante können die Signale herangezogen werden, die die Kamera 2 bzw. die Sensorzeile 1 liefert, wenn diese Kante gerade durch das Bildfeld läuft, was durch eine geeignete Synchronisation von Kamera bzw. Sensor mit dem sogenannten Maschinenwinkel erreicht wird, d. h. der Winkelstellung der Gegendruckzylinder 13 und 14. Dieser Maschinenwinkel ist der Steuerung 8 bekannt, die mit einem oder mehreren Encodern im Räderzug der Druckmaschine kommuniziert.With each of the two imaging systems, the camera 2 and the
In der
Im Messfelder 24a auf dem vergrößerten Abschnitt der Bogenvorderkante nach
Im Messfeld 24b nach
In den Messfeldern 24c und 24d der rechten und linken Seitenkante des Bogens nach
In dem Messfeld 24eder Seitenkanten des Bogens nach
Üblicherweise überlagern sich die anhand der
Die beschriebenen Auswirkungen von Fehleinstellungen der Druckmaschine auf das Abbild der Bogenkontur sind druckwerksabhängig, d. h. beschreiben jeweils die Fehleinstellungen des Druckwerks, hinter dessen Druckspalt die Bogenkontur abgebildet wird. Da andererseits diese Fehleinstellungen/Fehljustierungen relativ langzeitstabil sind, genügt es, das erfindungsgemäße Verfahren in größeren Abständen auf der Maschine einzusetzen, beispielsweise zu den mehr oder minder regelmäßig stattfindenden Servicezeitpunkten. Besonders vorteilhaft ist deshalb eine Vorgehensweise, bei der die Bogenkontur nacheinander in den verschiedenen Druckwerken der Druckmaschine von dem bildgebenden System, beispielsweise der Kamera 2, aufgenommen wird. Hierzu können an den einzelnen Druckwerken Halterungen installiert sein, in denen die Kamera 2 leicht auswechselbar befestigt wird, so dass sie sukzessive in die einzelnen Druckwerke eingesetzt wird, währenddessen ein unbedruckter Papierstapel durch die Maschine befördert wird. Gleiches gilt insoweit auch für den Fall, dass anstelle der Kamera 2 eine Sensorzeile 1 verwendet wird.The described effects of incorrect settings of the printing press on the image of the sheet contour are dependent on the printing unit, d. H. describe in each case the incorrect settings of the printing unit, behind the nip of the sheet contour is displayed. On the other hand, since these incorrect settings / misalignments are relatively long-term stable, it is sufficient to use the inventive method at longer intervals on the machine, for example, the more or less regularly held service times. Therefore, a procedure in which the sheet contour is successively recorded in the various printing units of the printing press by the imaging system, for example the camera 2, is particularly advantageous. For this purpose, holders can be installed at the individual printing units, in which the camera 2 is attached easily replaceable, so that it is successively used in the individual printing units, while a blank paper stack is transported through the machine. The same applies to the extent that instead of the camera 2, a
Dabei können durchaus mehrere Bilder verschiedener Druckbögen hintereinander von der Kamera 2 oder der Sensorzeile 1 aufgenommen werden, um entweder den Signal-/Rauschabstand des Kantenbildes zu verbessern und damit die Messgenauigkeit zu erhöhen oder um festzustellen, ob es sich bei den gemessenen Abweichungen um eine reproduzierbaren Fehler handelt.It is quite possible for a plurality of images of different signatures to be taken in succession from the camera 2 or the
- 11
- Sensorzeilesensor line
- 22
- Kameracamera
- 33
- Druckwerkprinting unit
- 44
- Druckwerkprinting unit
- 55
- BogendruckmaschineSheetfed
- 66
- Auslegerboom
- 77
- Bogenarc
- 88th
- Steuerungcontrol
- 99
- Bildschirmscreen
- 1313
- GegendruckzylinderImpression cylinder
- 1414
- GegendruckzylinderImpression cylinder
- 1515
- Transfertertransferters
- 1616
- GummituchzylinderBlanket cylinder
- 1717
- Druckspaltnip
- 1919
- Bogenkonturarc contour
- 20a+b20a + b
- (Mess-)Stelle(Measuring) point
- 21a+b21a + b
- (Mess-)Stelle(Measuring) point
- 2222
- (Mess-)Stelle(Measuring) point
- 2323
- Greifergrab
- 24a-e24a-e
- Messfeldermeasuring fields
Claims (11)
dadurch gekennzeichnet,
dass das bildgebende System (1, 2) im Wesentlichen senkrecht zur Bogenfläche ausgerichtet und mindestens teilweise die sichtbaren Konturen (19) der Bogenränder erfasst und dass aus den gemessenen Abweichungen der Bogenränder zu Sollkonturen auf mindestens einen der folgenden Einstellungsfehler in den Druckwerken (3, 4) der Druckmaschine (5) geschlossen wird:
characterized,
in that the imaging system (1, 2) is oriented substantially perpendicular to the sheet surface and at least partially detects the visible contours (19) of the sheet edges and that from the measured deviations of the sheet edges to desired contours on at least one of the following setting errors in the printing units (3, 4 ) of the printing machine (5) is closed:
wobei aus den Abständen (23) der Konturstücke der Bogenvorderkante zwischen den Greifern zur Greiferhinterkante auf falsche Greiferöffnungszeitpunkte oder zu hoch bzw. zu tief liegende Greiferauflagen geschlossen wird.Method according to claim 1,
wherein from the distances (23) of the contour pieces of the sheet leading edge between the grippers to the gripper trailing edge on false gripper opening times or too high or too low gripper pads is closed.
wobei aus den Abweichungen (22) der Konturstücke der Bogenvorderkante von einer Geraden auf Fehleinstellungen zwischen der Bogenankunftszeit und den Greiferschließzeiten geschlossen wird.Method according to claim 1,
wherein from the deviations (22) of the contour pieces of the sheet leading edge from a straight line to incorrect settings between the Bogenankunftszeit and the gripper closing times is concluded.
wobei aus einer scheinbaren Verbreiterung des Bogens zunehmend von dem Zeitpunkt (20a, b), an dem der Bogen den Druckspalt verlässt, auf das Ausmaß des Abhebens des Druckbogens vom Druckzylinder (13, 14) geschlossen wird.Method according to claim 1,
wherein from an apparent broadening of the sheet increasingly from the time (20a, b), at which the sheet leaves the printing nip, to the extent of the lifting of the printing sheet from the printing cylinder (13, 14) is closed.
wobei aus einem horizontalen Konturversatz zu dem Zeitpunkt (21 a, b), da die Bogenhinterkante den Druckspalt verlässt, auf eine falsch gewählte Unterlegung/einen falsch gewählten Zylinderaufzug geschlossen wird.Method according to claim 1,
wherein from a horizontal contour offset at the time (21a, b), as the sheet trailing edge leaves the printing nip, it is concluded that an incorrectly selected underlay / wrong cylinder lift has been selected.
wobei das bildgebende System (1, 2) eine Videokamera oder eine Sensorzeile ist.Method according to claim 1,
wherein the imaging system (1, 2) is a video camera or a sensor line.
wobei zur Ermittlung der Einstellfehler der Druckmaschine die vom bildgebenden System (1, 2) gelieferten Signale für mehrere nacheinander durch die Druckmaschine (5) durchlaufende Bögen ausgewertet werden.Method according to claim 1,
wherein for determining the setting error of the printing press, the signals supplied by the imaging system (1, 2) are evaluated for a plurality of consecutively through the printing machine (5) passing arcs.
wobei mehrere bildgebende Systeme (1, 2) in jeweils verschiedenen Druckwerken der Druckmaschine angeordnet sind oder ein bildgebendes System nacheinander an verschiedenen Druckwerken (3, 4) befestigt wird.Method according to claim 1,
wherein a plurality of imaging systems (1, 2) are arranged in respectively different printing units of the printing press or an imaging system is sequentially attached to different printing units (3, 4).
wobei für die Abbildung der Bogenkonturen (19) unbedruckte Bögen durch die Druckmaschine (5) befördert und unbedruckt auf dem Anlagestapel (7) abgelegt werden.Method according to claim 1,
wherein for the illustration of the sheet contours (19) unprinted sheets are transported through the printing machine (5) and stored unprinted on the investment stack (7).
wobei vorab ausgewählte Bogenkonturabschnitte (24) für die Auswertung der Geometrieabweichungen herangezogen werden.Method according to one of claims 1 to 10,
wherein pre-selected sheet contour sections (24) are used for the evaluation of the geometric deviations.
wobei die Bildsignale, welche die Bogenkontur (19) oder Konturabschnitte (24) beschreiben, vor ihrer Auswertung einer digitalen Kantenfilterung unterzogen werden.Method according to one of claims 1 to 10,
wherein the image signals which describe the sheet contour (19) or contour sections (24) are subjected to digital edge filtering before their evaluation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011100413A DE102011100413A1 (en) | 2011-05-04 | 2011-05-04 | Method for determining setting errors in a sheet-fed printing machine |
Publications (2)
Publication Number | Publication Date |
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EP2520430A1 true EP2520430A1 (en) | 2012-11-07 |
EP2520430B1 EP2520430B1 (en) | 2014-08-27 |
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ID=46027710
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EP12165476.8A Active EP2520430B1 (en) | 2011-05-04 | 2012-04-25 | Method for detecting configuration errors in a sheet printing device |
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US (1) | US20120279410A1 (en) |
EP (1) | EP2520430B1 (en) |
DE (1) | DE102011100413A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102017208515A1 (en) | 2017-05-19 | 2018-11-22 | Koenig & Bauer Ag | Method for operating a sheet-processing machine and sheet-processing machine |
DE102017212132A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
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DE102017212133A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine and method for operating a sheet processing machine |
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DE102016224307A1 (en) | 2015-12-15 | 2017-06-22 | Heidelberger Druckmaschinen Ag | Method of checking an image inspection system |
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DE102017208515A1 (en) | 2017-05-19 | 2018-11-22 | Koenig & Bauer Ag | Method for operating a sheet-processing machine and sheet-processing machine |
DE102017212132A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212140A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017012188A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212143A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212138A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212133A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine and method for operating a sheet processing machine |
DE102017012187A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212137A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212134A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212141A1 (en) | 2017-07-14 | 2019-01-17 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212143B4 (en) | 2017-07-14 | 2019-03-21 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212138B4 (en) | 2017-07-14 | 2019-03-21 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212141B4 (en) | 2017-07-14 | 2019-03-21 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212134B4 (en) | 2017-07-14 | 2019-03-28 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212140B4 (en) | 2017-07-14 | 2019-03-28 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212137B4 (en) | 2017-07-14 | 2019-03-28 | Koenig & Bauer Ag | Sheet processing machine |
DE102017212133B4 (en) | 2017-07-14 | 2019-05-23 | Koenig & Bauer Ag | Sheet processing machine and method for operating a sheet processing machine |
DE102017212132B4 (en) | 2017-07-14 | 2019-06-19 | Koenig & Bauer Ag | Sheet processing machine |
Also Published As
Publication number | Publication date |
---|---|
EP2520430B1 (en) | 2014-08-27 |
DE102011100413A1 (en) | 2012-11-08 |
US20120279410A1 (en) | 2012-11-08 |
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