EP1543963B1 - Procédé et dispositif pour corriger la déviation de la position d'un produit à imprimer - Google Patents

Procédé et dispositif pour corriger la déviation de la position d'un produit à imprimer Download PDF

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Publication number
EP1543963B1
EP1543963B1 EP04024237A EP04024237A EP1543963B1 EP 1543963 B1 EP1543963 B1 EP 1543963B1 EP 04024237 A EP04024237 A EP 04024237A EP 04024237 A EP04024237 A EP 04024237A EP 1543963 B1 EP1543963 B1 EP 1543963B1
Authority
EP
European Patent Office
Prior art keywords
correction
processing station
deviation
profile
transported item
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.)
Not-in-force
Application number
EP04024237A
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German (de)
English (en)
Other versions
EP1543963A1 (fr
Inventor
Stephan Schultze
Hans-Jürgen DÖRES
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rexroth Indramat GmbH
Original Assignee
Rexroth Indramat GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rexroth Indramat GmbH filed Critical Rexroth Indramat GmbH
Publication of EP1543963A1 publication Critical patent/EP1543963A1/fr
Application granted granted Critical
Publication of EP1543963B1 publication Critical patent/EP1543963B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • 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
    • B41P2213/90—Register control
    • B41P2213/91—Register control for sheet printing presses

Definitions

  • the invention relates to a method and a device for correcting the positional deviation of a transported good, in particular a sheet or a material web.
  • DE 44 36 034 A1 shows a method according to the preamble of claim 1 and an apparatus according to the preamble of claim 12. The method described herein and the apparatus for performing the method are used to align alignment of sheets before passing to a sheet-processing machine.
  • DE 44 44 755 A1 shows a device for conveying sheets, in which a sheet is to be accurately transported in a sheet-processing machine.
  • register control for sheet-fed printing.
  • the position of the sheet on the printing cylinder 16 is adjusted so that it is in register. With the register accuracy it can be guaranteed that the pressure points of the different colors can be exactly positioned.
  • a color applied to the printing material or another label applied separately may be scanned. From the sampling value thus determined, it is possible, for example, to determine the current actual position value of the printing material via a temporal or spatial evaluation. By comparing with a setpoint, a deviation can be determined, which must be corrected in order to edit the substrate in a subsequent processing step positionally accurate.
  • processing steps can be, for example, a further color imprint, the cutting of the printing material, the stamping or folding.
  • the following processing unit can be superimposed on the synchronous machine run by a correction movement.
  • the lateral position of a sheet can be corrected in a printing press.
  • a positional deviation of the side edge of the sheet from the desired value is first determined via a nominal-actual comparison of measured values of the sheet. Subsequently, the sheet is brought by a correction movement in the desired position.
  • the correction path is the path by which the item to be transported moves in the direction of transport while the correction movement is being carried out.
  • the altogether superimposed way which corresponds to the duration of the corrective action, is called correction.
  • the correction profile is plotted on the x-axis and the correction on the y-axis in an xy diagram, a graphic representation is created, which is called the correction profile.
  • today's machines for transporting sheets, such as printing presses, post-press machines, such as folding machines or other machines for transporting goods in transit are defined Correction profile fixed. Thus, these fixed correction profiles are not adaptable to different applications or even machine types.
  • Object of the present invention is therefore to propose a method for correcting the position of a cargo, which can be used for different applications and machine types.
  • the plurality of correction profiles is stored, in particular stored selectively in the control device of the transport device.
  • the correction profile can be selected by the user in advance for the upcoming transport process.
  • Another embodiment of the invention makes it possible to automatically select the appropriate correction profile from the plurality of stored correction profiles from the controller according to predetermined criteria.
  • One of these criteria can be about the current or predetermined transport speed.
  • At least one of the selectable stored correction profiles may be included, which is asymmetrical.
  • This asymmetry is z. B. achieved in that the acceleration process with respect to a symmetrical profile slower, d. H. gentler and the braking process abrupt is selected.
  • the selectable correction profiles can be specified or changed by the user.
  • interpolation point tables which can be set up by the user to define the correction profiles are suitable for this purpose.
  • the selectable correction profiles are designed so that the appropriate correction profile can be changed during the run of the transport device by the user or automatically.
  • the respectively used correction profile can now be adapted to the current transport conditions, for example to the respective current speed of the transported goods.
  • a transport device 10 is shown.
  • the transport device 10 is shown by way of example as a sheet conveying device in a rotary printing machine.
  • the cargo so the sheet 12 is moved in the transport direction 14 and a processing station, as in Fig. 1 shown fed to a printing cylinder 16.
  • a processing station may be provided, such as a cutting device or a perforating device.
  • the feed to the printing cylinder 16 must be accurate in register, ie, so that the processing takes place exactly at the point of the sheet, which is provided for this purpose.
  • registering is required for accurate color reproduction.
  • a position detection device in the form of an optical scanner 18 is provided in front of the printing cylinder 16.
  • the scanner 18 can detect the position of the sheet 12 based on predetermined criteria. In particular, the detection of the printed image itself, separate position markings or approximately the edge of the sheet 12 comes into consideration.
  • the current actual position of the sheet 12 or a corresponding size is known. This can now be compared in a comparator 20 with a stored target value. From the comparison it can then be determined whether it is necessary to correct the position of the sheet 12. Usually, this is the case when the Deviation between the setpoint and the actual value exceeds a predetermined value. Basically, there are two ways to perform the correction, where appropriate, the two methods can also be mixed, that can be combined with each other so that the required total correction is achieved.
  • the position of the sheet 12 can be transferred approximately using an actuator in the desired position. Alternatively, the position and / or movement of the subsequent printing unit can be adapted to the actual position of the sheet. If both correction methods are used, only a part of the required correction is carried out by a movement of the sheet in the direction of the desired value. The remaining value is achieved by a correspondingly small adjustment of the printing cylinder 16 or the movement of the printing cylinder 16.
  • the required movement is represented by a so-called correction profile given by the functional relationship between the correction path s and the rotation angle ⁇ within which the correction has to be made Since the correction profiles will be different depending on the type of the machine and the type of the machining device a plurality of correction profiles P1, P2, P3 are stored in a memory device 21, from which then a suitable one is selected in order to carry out the correction Control device 19 of the transport device 10 may be connected or integrated in this.
  • the appropriate correction profile P i is used and the resulting correction movement is superimposed on the movement of the impression cylinder 16, which is usually a function of the synchronous machine run.
  • the suitable profile P i can also be predefined automatically on the basis of specific machine data which are automatically determined. It is also advantageous if either the user or the transport device 10 itself selects the appropriate correction profiles from the plurality of correction profiles P1, P2, P3 in accordance with the respective operating condition. So z. B. a speed-dependent selection can be realized, which in turn ensures a more accurate positioning for different application conditions.
  • the plurality of correction profiles P1, P2, P3 can, for. B. are stored as a table in the storage device 21, so then from the controller of the machine a suitable correction table can be loaded. If the table can be specified by the user, a further degree of freedom is achieved. For this purpose, the user is given the opportunity, for example with an input medium 22, to edit the interpolation table and to modify it according to the requirements. Of course, it is also possible to create or modify the correction table in another way by re-loading one or all of the tables or table values into the controller of the machine by means of external data access.
  • the stored correction profiles P1, P2 and P3 can have different shapes. In particular, they can be linear, exponential or sinusoidal. It is also possible to make the correction profiles asymmetrical, so that braking and acceleration operations take place at different speeds. For example, accelerating can be done quickly, but deceleration can be done slowly.
  • Fig. 2 illustrates again in a flow chart the process sequence according to the invention.
  • First, the actual position of a transported good is detected in a first method step 24.
  • method step 26 a check is made as to whether a correction is necessary on the basis of the ascertained actual value and a predefined setpoint value. If no correction is required, the actual value of the next item to be transported is recorded.
  • step 28 the correction profile suitable for the respective application and the machine used is used from a plurality of correction profiles.
  • a further step 30 may be performed prior to step 28.
  • the selection can only be made once for the entire processing operation, that is to say for the entire print job.
  • a suitable correction table can also be loaded several times during the machine run. The selection of the appropriate correction profile from the plurality of stored correction profiles P1, P2, P3 can thus also take place during the machine run on the basis of given current machine parameters, such as the current speed, acceleration or other parameters.
  • the invention is not limited to this special case of a transport device with a processing station. Rather, the invention can be used in all transport equipment in which a defined orientation of the cargo to a processing station is desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Handling Of Sheets (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Claims (15)

  1. Procédé pour corriger la déviation de position d'un produit transporté (12), en particulier d'une feuille ou d'une bande de matériau dans une imprimante, qui est acheminé avec un dispositif de transport (10) d'un poste de traitement (16) en vue du traitement du produit transporté (12), la déviation du produit transporté (12) de sa position de consigne étant établie et sur la base de la déviation, une correction étant réalisée à l'aide d'un profil de correction (P1, P2, P3), caractérisé en ce qu'un profil de correction approprié (Pi) est sélectionné à partir d'une pluralité de profils de correction sélectionnables (P1, P2, P3) en fonction du type de poste de traitement (16) et le mouvement de correction résultant du profil de correction approprié (Pi) est superposé à un mouvement du poste de traitement (16).
  2. Procédé selon la revendication 1, caractérisé en ce que le poste de traitement (16) est un cylindre d'impression ou un dispositif de coupe ou un dispositif de perforation.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le poste de traitement (16) est un cylindre d'impression (16), la position et/ou le mouvement du cylindre d'impression (16) étant adaptés à la déviation du produit transporté (12) de sa position de consigne, et/ou la position du produit transporté (12) étant transférée à la position de consigne.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la pluralité des profils de correction sélectionnables (P1, P2, P3) est mémorisée, notamment est mémorisée de manière sélectionnable dans la commande du dispositif de transport (10).
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le profil de correction approprié (Pi) est sélectionné par l'utilisateur préalablement pour l'opération de transport.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le profil de correction approprie (Pi) est sélectionné par le dispositif de commande (19) du dispositif de transport (10) en fonction de critères prédéfinis.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'un profil de correction asymétrique (Pi) est sélectionné en tant que profil approprié.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'au moins l'un des profils de correction sélectionnables (P1, P2, P3) est prédéfini par l'utilisateur, notamment sous la forme d'un tableau de points de référence.
  9. Procédé selon la revendication 8, caractérisé en ce qu'au moins l'un des profils de correction sélectionnables (P1, P2, P3) est prédéfini par l'utilisateur par des coefficients polynomiaux prédéfinis de manière variable d'une ligne polynomiale et/ou par des coefficients prédéfinissables de manière variable d'une fonction quelconque.
  10. Procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le profil de correction approprié (Pi) est changé par l'utilisateur ou automatiquement au cours du fonctionnement du dispositif de transport (10).
  11. Procédé selon la revendication 10, caractérisé en ce que le changement du profil de correction s'effectue en fonction de la vitesse du produit transporté (12).
  12. Dispositif de correction de la déviation de position d'un produit transporté (12), en particulier d'une feuille ou d'une bande de matériau dans une imprimante, qui est acheminé avec un dispositif de transport (10) d'un poste de traitement (16) en vue du traitement du produit transporté (12), comprenant un dispositif (20) pour déterminer la déviation de la position du produit transporté (12) de sa position de consigne et un dispositif pour corriger cette déviation, en particulier pour corriger la position du point de travail d'un poste de traitement subséquent (16) sur la base d'un profil de correction (P1, P2, P3), caractérisé en ce qu'un dispositif (21) pour mémoriser une pluralité de profils de correction sélectionnables (P1, P2, P3), qui sont différents en fonction du type de poste de traitement (16), est prévu, et en ce que le dispositif pour corriger cette déviation est configuré pour superposer le mouvement de correction résultant du profil de correction approprié (Pi) à un mouvement du poste de traitement (16).
  13. Dispositif selon la revendication 12, caractérisé en ce que le poste de traitement (16) est un cylindre d'impression ou un dispositif de coupe ou un dispositif de perforation.
  14. Dispositif selon la revendication 12 ou 13, caractérisé en ce que le poste de traitement (16) est un cylindre d'impression (16), le dispositif pour corriger cette déviation étant configuré pour adapter la position et/ou le mouvement du cylindre d'impression (16) à la déviation du produit transporté (12) de sa position de consigne et/ou pour transférer la position du produit transporté (12) à la position de consigne.
  15. Dispositif selon l'une quelconque des revendications 12 à 14, caractérisé en ce que les profils de correction sélectionnables (P1, P2, P3) se présentent sous la forme d'un tableau de points de référence.
EP04024237A 2003-12-20 2004-10-12 Procédé et dispositif pour corriger la déviation de la position d'un produit à imprimer Not-in-force EP1543963B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10360168 2003-12-20
DE10360168A DE10360168A1 (de) 2003-12-20 2003-12-20 Verfahren und Vorrichtung zur Korrektur der Lageabweichung eines Transportgutes

Publications (2)

Publication Number Publication Date
EP1543963A1 EP1543963A1 (fr) 2005-06-22
EP1543963B1 true EP1543963B1 (fr) 2012-12-12

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EP04024237A Not-in-force EP1543963B1 (fr) 2003-12-20 2004-10-12 Procédé et dispositif pour corriger la déviation de la position d'un produit à imprimer

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Country Link
US (1) US7117795B2 (fr)
EP (1) EP1543963B1 (fr)
JP (1) JP2005179066A (fr)
DE (1) DE10360168A1 (fr)

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Also Published As

Publication number Publication date
DE10360168A1 (de) 2005-07-21
US7117795B2 (en) 2006-10-10
EP1543963A1 (fr) 2005-06-22
JP2005179066A (ja) 2005-07-07
US20050132918A1 (en) 2005-06-23

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