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EP1745925B2 - Register control device - Google Patents
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EP1745925B2 - Register control device - Google Patents

Register control device Download PDF

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Publication number
EP1745925B2
EP1745925B2 EP06013301.4A EP06013301A EP1745925B2 EP 1745925 B2 EP1745925 B2 EP 1745925B2 EP 06013301 A EP06013301 A EP 06013301A EP 1745925 B2 EP1745925 B2 EP 1745925B2
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EP
European Patent Office
Prior art keywords
acceleration
register
control
acceleration phase
register control
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EP06013301.4A
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German (de)
French (fr)
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EP1745925B1 (en
EP1745925A3 (en
EP1745925A2 (en
Inventor
Hans-Jürgen DÖRES
Stephan Dr. Schultze
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Bosch Rexroth AG
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Bosch Rexroth AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/0009Central control units
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F13/00Common details of rotary presses or machines
    • B41F13/02Conveying or guiding webs through presses or machines
    • B41F13/025Registering devices

Definitions

  • the invention relates to a method for register control for a multicolor rotary printing press in an acceleration phase with at least one register control device with control parameters for operation at a constant speed and with a motion control for controlling the platen speed.
  • the individual color separations are applied, in particular for cyan, magenta, yellow and black, in successive printing units.
  • the printing material is provided as a roll material and passed endlessly through the printing unit. Decisive for the achieved print quality is that the print images of the individual colors are exactly on top of each other.
  • the superposition of the printed images is referred to as a register.
  • register marks for mutual alignment of the individual printing units, register marks, for example in the form of register marks, are printed in addition to the actual printed image of each printing unit. Using these marks, an offset between the individual print images can be recorded online by means of an optical measuring system. In rotary printing systems, this measuring system is generally part of a control system known as register control.
  • the register control engages over suitable actuators in the printing process and compensates detected by the optical measuring system register deviations. In particular, the actuators can change the web length of the printing material between successive printing units so that the printed images of successive printing units are superimposed.
  • the cause of deviations between the individual prints are, in addition to the relative position of the printing units, changes in the geometry of the printing material. These geometry changes are caused, for example, by the influence of moisture and by drying steps arranged between the printing units.
  • the web tension is kept largely the same, which allows a good print quality without significant corrections.
  • the control parameters of the register control are adapted to this operating state. For both positive and negative acceleration processes, however, the web tension changes with a negative influence on register accuracy. This can not be sufficiently compensated by the control system, resulting in this operating phase to appropriate committee. Even after the acceleration phase, the control system requires a certain running time to get back to the appropriate manipulated variables. This can also cause rejects.
  • DE 40 37 728 C1 is a device for register control for multi-color web-fed rotary printing presses according to the web / web method described with a controller having a central unit for detecting and storing all control parameters and the control behavior, with a scanner for detecting web register marks and with actuators for controlling the longitudinal register.
  • the apparatus includes a monitoring unit having an acceleration detecting means which detects a deviating from egg ner stable orbit velocity speed change of the printing press on the printing cylinders and having a shutdown device, which is in signal communication with the acceleration detecting means, and the control activity at the occurrence of a speed change representing Interrupts signals until a constant operating speed is reached again.
  • a disadvantage of this device is that to determine the acceleration of an acceleration detection device is provided with at least one corresponding speedometer for detecting the web speed. This leads due to the additional components required to increased system costs and due to the necessary wiring of the speedometer to increased installation costs. The costs are thereby increased even further, since it is advantageous to provide such a speedometer on each printing unit.
  • a further disadvantage is that often the spatial conditions within the printing unit do not allow to install the speedometer in a suitable position.
  • the EP 0 709 184 A1 describes a register correction method for a sheet-fed offset printing machine wherein the occurring register errors are measured for a plurality of printing speeds and the necessary register corrections for the respective speed are determined and stored based on the fixed register errors. During the printing process, the stored register corrections are transmitted to the printing units as manipulated variables as a function of the current printing speed.
  • a disadvantage of this method is that, on the one hand, several measuring passes are required in order to determine the correction values. This leads to waste. On the other hand, there are many other parameters such as temperature, humidity, etc. which affect the machine and the material, which is why the predetermined manipulated variables do not allow sufficient correction of the occurring register errors.
  • the object is achieved in that the register control device is acted upon in the acceleration phase with at least one fixed set of the control parameters, which differs from the control parameters at a constant speed.
  • a changeover to changed control parameters is carried out.
  • the controller remains active during the acceleration phase and compensates for register deviations during this phase.
  • the register controller can be optimally adapted to the requirements during the acceleration phase and thus a minimum register offset can be achieved.
  • the controller parameters or correction values are reset to the values before the acceleration phase for constant speed.
  • the information about the presence of an acceleration phase is available to the motion control of the rotary printing machine and can be provided from there to the register controller. Additional speed sensors for detecting the acceleration phase can thus be saved, resulting in reduced component, assembly and cabling costs. This is especially true, since advantageously the acceleration is detected in all printing units of the printing unit and thus several speed sensors can be saved at the same time. Another advantage results from the fact that the determination of an acceleration phase is also possible in rotary printing presses with printing units in which no mounting space for speed sensors is provided.
  • the information provided by the motion control information about the acceleration phase can be used both to replace the control parameters or the correction profile or to a known from the prior art reaction, for example, the freezing of the controller output during the acceleration phase.
  • the register controller can compensate for deviations during the speed change more quickly. This can be associated with a slightly worse print quality.
  • a simple data exchange between the motion controller and the register controller is achieved by giving the information about the presence of the acceleration phase, the acceleration signal, as a binary signal from the motion controller to the register controller.
  • the signal can be routed to an external register controller via a fieldbus or, if the register controller and the motion controller are integrated in the same control hardware, can be transferred directly, for example via an internal bus system.
  • Binary signals are already present in today's motion control systems in the form of "speed setpoint", for example, and can be used without additional measures. If speed changes are always carried out with the same acceleration due to the machine or if only one possible reaction is provided, for example switching to a changed control parameter set, then a binary signal is sufficient to describe the acceleration process.
  • the acceleration signal is given to the register control device as a signal proportional to the acceleration, a different reaction can be initiated according to the actual acceleration.
  • different correction profiles can be used for deceleration and acceleration processes or for different speed changes.
  • the signal proportional to the acceleration can be routed to the register controller both as an analog signal and as a digital signal.
  • information about a start and an end of the acceleration phase is given by the motion controller to the register controller and at the beginning of the acceleration phase the manipulated variable is stored and at the end of the acceleration phase the manipulated variable is set to a value derived from a value at the beginning of the acceleration phase. For example, the value of the manipulated variable at the beginning of the Acceleration phase present value.
  • the reaction of the register control on the acceleration information during the acceleration phase can be carried out according to the embodiments described above.
  • FIG. 1 shows a register control 1 with a motion controller 24 for a platen roller 20 with an external register control 1.
  • the register control 1 acts here via a manipulated variable 11 to a converter 23, which supplies a drive motor 21, which in turn moves the pressure roller 20.
  • the movement of the drive motor 21 is registered by a rotary encoder 22 and forwarded via the inverter 23 to the motion controller 24.
  • the register control 1 receives from the motion controller 24 an acceleration signal 13.
  • the acceleration signal 13 can be binary (eg as the signal "speed setpoint reached") or as an analog signal representing the actual value of the acceleration transmitted.
  • FIG. 2 shows a register control 1, which is integrated in the motion controller 24. Both the acceleration signal 13 and the manipulated variable 11 occur only within the motion control 24, whereby a complex communication between different modules can be omitted. In a further development, the acceleration signal 13 can be generated simultaneously with the signal for a speed change of the drive. The time offset by the evaluation of the rotary encoder 22 can then be omitted.
  • FIG. 3 shows a register control 1 with a register control device 10, which outputs a manipulated variable 11 to the higher-level control.
  • An acceleration sensor 12 outputs the acceleration signal 13 to the register control device 10 and to a changeover switch 14.
  • a first set of control parameters 16 At a constant rotational speed of the pressure roller acts on the register control device 10, a first set of control parameters 16. If the acceleration signal 13 indicates a deviation from the constant rotational speed, the switch 14 switches to a second set of control parameters 15.
  • These control parameters 15 may be selected to be more dynamic or less dynamic than the control parameters 16 at constant speed.
  • FIG. 4 shows a register control 1 with a register control device 10, wherein the switch 14 selects between a correction profile 18 at a constant speed and a correction profile 17 during a Bescheun Trentsphase.
  • the acceleration signal 13 can also be used to store the manipulated variable 11 at the beginning of the acceleration phase.
  • the register control device 10 can then continue to regulate during the acceleration phase and restore the value of the manipulated variable 11 at its end.
  • the switching to more dynamic control parameters 15 with a storage of the manipulated variable 11 at the beginning of the acceleration and its restoration at the end of the acceleration phase can be advantageously combined.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Rotary Presses (AREA)

Abstract

The register regulation process involves movement control (24) for the printing roll speeds. The regulator (1) is supplied with fixed parameters for the acceleration phase which differ from those for the constant-speed phase. A correction profile for the acceleration phase also differs from that for the constant-speed phase. This ensures that the regulator remains active and that deviations are corrected.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Verfahren zur Registerregelung für eine Mehrfarben-Rotationsdruckmaschine in einer Beschleunigungsphase mit mindestens einer Registerregeleinrichtung mit Regelparametern für den Betrieb bei konstanter Geschwindigkeit und mit einer Bewegungssteuerung zur Steuerung der Druckwalzengeschwindigkeit.The invention relates to a method for register control for a multicolor rotary printing press in an acceleration phase with at least one register control device with control parameters for operation at a constant speed and with a motion control for controlling the platen speed.

Beim Mehrfarbendruck in Rotationsdruckmaschinen erfolgt der Auftrag der einzelnen Farbauszüge, insbesondere für Cyan, Magenta, Gelb und Schwarz, in aufeinander folgenden Druckwerken. Der Bedruckstoff wird dabei als Rollenmaterial bereitgestellt und endlos durch die Druckeinheit geführt. Maßgeblich für die erreichte Druckqualität ist, dass die Druckbilder der einzelnen Farben exakt übereinander liegen. Das Übereinanderliegen der Druckbilder wird dabei als Register bezeichnet. Zur gegenseitigen Ausrichtung der einzelnen Druckwerke werden zusätzlich zu dem eigentlichen Druckbild von jedem Druckwerk Registermessmarken, zum Beispiel in Form von Passerkreuzen, aufgedruckt. Anhand dieser Marken kann ein Versatz zwischen den einzelnen Druckbildern durch ein optisches Messsystem online erfasst werden. Bei Rotationsdrucksystemen ist dieses Messsystem im Allgemeinen Bestandteil eines Regelsystems, der so genannten Registerregelung. Die Registerregelung greift dabei übergeeignete Stellglieder in den Druckprozess ein und gleicht von dem optischen Messsystem erkannte Registerabweichungen aus. Insbesondere können die Stellglieder die Bahnlänge des Bedruckstoffes zwischen aufeinander folgenden Druckwerken so verändern, dass die Druckbilder aufeinander folgender Druckeinheiten übereinander liegen.In multicolor printing in rotary printing presses, the individual color separations are applied, in particular for cyan, magenta, yellow and black, in successive printing units. The printing material is provided as a roll material and passed endlessly through the printing unit. Decisive for the achieved print quality is that the print images of the individual colors are exactly on top of each other. The superposition of the printed images is referred to as a register. For mutual alignment of the individual printing units, register marks, for example in the form of register marks, are printed in addition to the actual printed image of each printing unit. Using these marks, an offset between the individual print images can be recorded online by means of an optical measuring system. In rotary printing systems, this measuring system is generally part of a control system known as register control. The register control engages over suitable actuators in the printing process and compensates detected by the optical measuring system register deviations. In particular, the actuators can change the web length of the printing material between successive printing units so that the printed images of successive printing units are superimposed.

Die Ursache für Abweichungen zwischen den einzelnen Drucken sind neben der relativen Position der Druckwerke zueinander Änderungen in der Geometrie des Bedruckstoffes. Diese Geometrieänderungen werden zum Beispiel durch den Einfluss von Feuchtigkeit und durch zwischen den Druckwerken angeordnete Trocknungsschritte hervorgerufen.The cause of deviations between the individual prints are, in addition to the relative position of the printing units, changes in the geometry of the printing material. These geometry changes are caused, for example, by the influence of moisture and by drying steps arranged between the printing units.

Während des Druckprozesses wird die Bahnspannung weitestgehend gleich gehalten, was eine gute Druckqualität ohne wesentliche Korrekturen ermöglicht. Die Regelparameter der Registerregelung sind auf diesen Betriebszustand angepasst. Bei sowohl positiven als auch negativen Beschleunigungsvorgängen hingegen ändert sich die Bahnspannung mit negativem Einfluss auf die Registergenauigkeit. Dies kann von dem Regelsystem nicht ausreichend ausgeglichen werden, was in dieser Betriebsphase zu entsprechendem Ausschuss führt. Auch nach der Beschleunigungsphase benötigt das Regelsystem eine gewisse Laufdauer, um wieder zu den geeigneten Stellgrößen zu gelangen. Auch hierdurch kann Ausschuss entstehen.During the printing process, the web tension is kept largely the same, which allows a good print quality without significant corrections. The control parameters of the register control are adapted to this operating state. For both positive and negative acceleration processes, however, the web tension changes with a negative influence on register accuracy. This can not be sufficiently compensated by the control system, resulting in this operating phase to appropriate committee. Even after the acceleration phase, the control system requires a certain running time to get back to the appropriate manipulated variables. This can also cause rejects.

In der DE 40 37 728 C1 ist eine Vorrichtung zur Registerregelung für Mehrfarben-Rollenrotationsdruckmaschinen gemäß dem Bahn/Bahn-Verfahren beschrieben mit einem Regler mit einer Zentraleinheit zur Erfassung und Abspeicherung aller Regelparameter und des Regelverhaltens, mit einer Abtasteinrichtung zur Erfassung von Bahn-Registermarken und mit Stellgliedern zur Regelung des Längsregisters. Die Vorrichtung enthält eine Überwachungseinheit, die eine Beschleunigungserfassungseinrichtung aufweist, die eine von ei ner stabilen Bahngeschwindigkeit abweichende Geschwindigkeitsänderung der Druckmaschine an den Druckzylindern ermittelt und die eine Abschalteinrichtung aufweist, die mit der Beschleunigungserfassungseinrichtung in Signalverbindung steht, und die die Regeltätigkeit beim Auftreten eines diese Geschwindigkeitsänderung repräsentierenden Signals solange unterbricht, bis wiederum eine konstante Betriebsgeschwindigkeit erreicht ist.In the DE 40 37 728 C1 is a device for register control for multi-color web-fed rotary printing presses according to the web / web method described with a controller having a central unit for detecting and storing all control parameters and the control behavior, with a scanner for detecting web register marks and with actuators for controlling the longitudinal register. The apparatus includes a monitoring unit having an acceleration detecting means which detects a deviating from egg ner stable orbit velocity speed change of the printing press on the printing cylinders and having a shutdown device, which is in signal communication with the acceleration detecting means, and the control activity at the occurrence of a speed change representing Interrupts signals until a constant operating speed is reached again.

Nachteilig bei dieser Vorrichtung ist, dass zur Ermittlung der Beschleunigung eine Beschleunigungserfassungseinrichtung mit zumindest einem entsprechenden Geschwindigkeitsmesser zur Erfassung der Bahngeschwindigkeit vorzusehen ist. Dies führt wegen der zusätzlich benötigten Bauteile zu erhöhten Systemkosten als auch aufgrund der notwendigen Verkabelung des Geschwindigkeitsmessers zu erhöhten Montagekosten. Die Kosten werden dabei noch weiter erhöht, da vorteilhaft an jedem Druckwerk ein solcher Geschwindigkeitsmesser vorzusehen ist.A disadvantage of this device is that to determine the acceleration of an acceleration detection device is provided with at least one corresponding speedometer for detecting the web speed. This leads due to the additional components required to increased system costs and due to the necessary wiring of the speedometer to increased installation costs. The costs are thereby increased even further, since it is advantageous to provide such a speedometer on each printing unit.

Nachteilig ist weiterhin, dass häufig die räumlichen Bedingungen innerhalb der Druckeinheit nicht erlauben, die Geschwindigkeitsmesser in geeigneter Position anzubringen.A further disadvantage is that often the spatial conditions within the printing unit do not allow to install the speedometer in a suitable position.

Da während der Geschwindigkeitsänderung die Regeltätigkeit unterbrochen und der Reglerausgang auf den letzten Wert vor der Geschwindigkeitsänderung festgelegt ist, wird während dieser Phase keine Registerkorrekturdurchgeführt. Diesführtwährend der Beschleunigungsphase zu einer verstärkten Registerabweichung und somit zu einem verstärkten Ausschuss.Since during the speed change the control activity is interrupted and the controller output is set to the last value before the speed change, no register correction is performed during this phase. This leads to an increased register deviation during the acceleration phase and thus to increased rejects.

Die EP 0 709 184 A1 beschreibt ein Registerkorrekturverfahren für eine Bogen-Offset-Druckmaschine, wobei die auftretenden Registerfehler für eine Vielzahl von Druckgeschwindigkeiten gemessen werden und anhand derfestgestelften Registerfehler die notwendigen Registerkorrekturen für die jeweilige Geschwindigkeit ermittelt und gespeichert werden. Während des Fortdrucks werden die gespeicherten Registerkorrekturen in Abhängigkeit von der aktuellen Druckgeschwindigkeit als Stellgrößen an die Druckwerke übermittelt. Nachteilig an diesem Verfahren ist, dass zum einen mehrere Messdurchläufe erforderlich sind, um die Korrekturwerte zu bestimmen. Dies führt zu Makulatur. Zum anderen existieren viele weitere Parameter wie z.B. Temperatur, Luftfeuchte usw. die auf die Maschine und das Material Einfluss nehmen, weshalb die vorbestimmten Stellgrößen keine ausreichende Korrektur der auftretenden Registerfehler ermöglichen.The EP 0 709 184 A1 describes a register correction method for a sheet-fed offset printing machine wherein the occurring register errors are measured for a plurality of printing speeds and the necessary register corrections for the respective speed are determined and stored based on the fixed register errors. During the printing process, the stored register corrections are transmitted to the printing units as manipulated variables as a function of the current printing speed. A disadvantage of this method is that, on the one hand, several measuring passes are required in order to determine the correction values. This leads to waste. On the other hand, there are many other parameters such as temperature, humidity, etc. which affect the machine and the material, which is why the predetermined manipulated variables do not allow sufficient correction of the occurring register errors.

Es ist Aufgabe der Erfindung, eine Registerregelung der Eingangs erwähnten Art zu schaffen, welche gegenüber dem Stand der Technik Bauteile einspart und die Makulatur während und nach Beschleunigungsphasen minimiert.It is an object of the invention, a register control To create the aforementioned type, which saves on the prior art components and minimizes the waste during and after acceleration phases.

Vorteile der ErfindungAdvantages of the invention

Die Aufgabe wird dadurch gelöst, dass die Registerregeleinrichtung in der Beschleunigungsphase mit mindestens einem festen Satz von den Regelparametern beaufschlagt wird, der sich von den Regelparametern bei konstanter Geschwindigkeit unterscheidet. Dabei wird bei Registerreglem mit einstellbaren Regelparametern eine Umschaltung auf geänderte Regelparameter durchgeführt werden.The object is achieved in that the register control device is acted upon in the acceleration phase with at least one fixed set of the control parameters, which differs from the control parameters at a constant speed. In the case of register controllers with adjustable control parameters, a changeover to changed control parameters is carried out.

Bei beiden Verfahren bleibt während der Beschleunigungsphase der Regler weiterhin aktiv und gleichtauch in dieser Phase Registerabweichungen aus. Durch den gegenüber konstanter Geschwindigkeit geänderten Satz an Regelparametern beziehungsweise Korrekturwerten kann der Registerregler optimal auf die Anforderungen während der Beschleunigungsphase angepasst und somit ein minimaler Registerversatz erzielt werden. Nach der Beschleunigungsphase werden die Reglerparameter beziehungsweise Korrekturwerte wiederauf die Werte vor der Beschleunigungsphase fürkonstante Geschwindigkeit gesetzt.In both methods, the controller remains active during the acceleration phase and compensates for register deviations during this phase. By changing the set of control parameters or correction values compared to a constant speed, the register controller can be optimally adapted to the requirements during the acceleration phase and thus a minimum register offset can be achieved. After the acceleration phase, the controller parameters or correction values are reset to the values before the acceleration phase for constant speed.

Die Information über das Vorliegen einer Beschleunigungsphase liegt der Bewegungssteuerung der Rotationsdruckmaschine vor und kann von dort der Registersteuerung bereitgestellt werden. Zusätzliche Geschwindigkeitssensoren zur Erfassung der Beschleunigungsphase können so eingespart werden, was zu reduzierten Bauteil-, Montage- und Verkabelungskosten führt. Dies gilt insbesondere, da vorteilhaft die Beschleunigung in allen Druckwerken der Druckeinheit erfasst wird und somit gleich mehrere Geschwindigkeitssensoren eingespart werden können. Ein weiterer Vorteil ergibt sich daraus, dass die Ermittlung einer Beschleunigungsphase auch bei Rotationsdruckmaschinen mit Druckwerken, in denen kein Montageplatz für Geschwindigkeitssensoren vorgesehen ist, möglich ist.The information about the presence of an acceleration phase is available to the motion control of the rotary printing machine and can be provided from there to the register controller. Additional speed sensors for detecting the acceleration phase can thus be saved, resulting in reduced component, assembly and cabling costs. This is especially true, since advantageously the acceleration is detected in all printing units of the printing unit and thus several speed sensors can be saved at the same time. Another advantage results from the fact that the determination of an acceleration phase is also possible in rotary printing presses with printing units in which no mounting space for speed sensors is provided.

Die von der Bewegungssteuerung bereitgestellte Information über die Beschleunigungsphase kann sowohl zum Austausch der Regelparameter oder des Korrekturprofils verwendet werden oder auch zu einer aus dem Stand der Technik bekannten Reaktion, zum Beispiel dem Einfrieren des Reglerausganges während der Beschleunigungsphase.The information provided by the motion control information about the acceleration phase can be used both to replace the control parameters or the correction profile or to a known from the prior art reaction, for example, the freezing of the controller output during the acceleration phase.

Wird in der Beschleunigungsphase ein stärkerer dynamischer Satz von Regelparametern als bei konstanter Geschwindigkeit verwendet, so kann der Registerregler Regelabweichungen während der Geschwindigkeitsänderung schneller ausregeln. Dies kann mit einer etwas schlechteren Druckqualität einhergehen.If a stronger dynamic set of control parameters is used in the acceleration phase than at constant speed, the register controller can compensate for deviations during the speed change more quickly. This can be associated with a slightly worse print quality.

Wird hingegen in der Beschleunigungsphase ein weniger dynamischer Satz von Regelparametern als bei konstanter Geschwindigkeit verwendet, so führt dies zu deutlich geringeren Stellbewegungen, wobei der Reglerjedoch weiterhin aktiv ist. Der Regelkreis bleibt stabil, Registerabweichungen werden ausgeglichen, aber die Stellglieder werden nicht zu weit von ihrer Position bei gleichförmiger Geschwindigkeit verstellt, was nach der Beschleunigungsphase dazu führt, dass die optimalen Betriebsbedingungen schnell wieder eingestellt werden können.If, on the other hand, a less dynamic set of control parameters is used in the acceleration phase than at constant speed, this leads to significantly lower actuating movements, but the controller is still active. The loop remains stable, register deviations are compensated, but the actuators are not adjusted too far from their position at uniform speed, which after the acceleration phase results in the optimum operating conditions being able to be quickly reset.

Ein einfacher Datenaustausch zwischen der Bewegungssteuerung und dem Registerregler wird dadurch erreicht, dass die Information über das Vorliegen der Beschleunigungsphase, das Beschleunigungssignal, als binäres Signal von der Bewegungssteuerung an die Registerregeleinrichtung gegeben wird. Dabei kann das Signal zum Beispiel über einen Feldbus an einen externen Registerregler geleitet werden oder, falls der Registerregler und die Bewegungssteuerung in der selben Steuerungshardware integriert sind, direkt zum Beispiel über ein internes Bussystem übergeben werden. Binäre Signale liegen heutigen Bewegungssteuerungen zum Beispiel in der Form "Geschwindigkeitssollwert erreicht" bereits vor und können ohne zusätzliche Maßnahmen verwendet werden. Werden Geschwindigkeitsänderungen maschinenbedingt immer mit der gleichen Beschleunigung durchgeführt beziehungsweise ist nur eine mögliche Reaktion, zum Beispiel das Umschalten auf einen geänderten Regelparametersatz, vorgesehen, so genügt ein binäres Signal zur Beschreibung des Beschleunigungsvorganges.A simple data exchange between the motion controller and the register controller is achieved by giving the information about the presence of the acceleration phase, the acceleration signal, as a binary signal from the motion controller to the register controller. In this case, for example, the signal can be routed to an external register controller via a fieldbus or, if the register controller and the motion controller are integrated in the same control hardware, can be transferred directly, for example via an internal bus system. Binary signals are already present in today's motion control systems in the form of "speed setpoint", for example, and can be used without additional measures. If speed changes are always carried out with the same acceleration due to the machine or if only one possible reaction is provided, for example switching to a changed control parameter set, then a binary signal is sufficient to describe the acceleration process.

Wird das das Beschleunigungssignal als ein der Beschleunigung proportionales Signal von der Bewegungssteuerung an die Registerregeleinrichtung gegeben, so kann entsprechend der tatsächlichen Beschleunigung eine unterschiedliche Reaktion eingeleitet werden. So können zum Beispiel für Abbrems- und Beschleunigungsvorgänge oder für unterschiedlich schnelle Geschwindigkeitsänderungen unterschiedliche Korrekturprofile verwendet werden. Dabei kann das der Beschleunigung proportionale Signal sowohl als analoges Signal als auch als digitales Signal an den Registerregler geleitet werden.If the acceleration signal is given to the register control device as a signal proportional to the acceleration, a different reaction can be initiated according to the actual acceleration. For example, different correction profiles can be used for deceleration and acceleration processes or for different speed changes. In this case, the signal proportional to the acceleration can be routed to the register controller both as an analog signal and as a digital signal.

Vorzugsweise wird eine Information über einen Beginn und ein Ende der Beschleunigungsphase von der Bewegungssteuerung an die Registerregeleinrichtung gegeben und beim Beginn der Beschleunigungsphase die Stellgröße gespeichert und beim Ende der Beschleunigungsphase die Stellgröße auf einen Wert gesetzt, der von einem Wert beim Beginn der Beschleunigungsphase abgeleitet ist. Beispielsweise kann der Wert der Stellgröße auf den beim Beginn der Beschleunigungsphase vorliegenden Wert gesetzt werden.Preferably, information about a start and an end of the acceleration phase is given by the motion controller to the register controller and at the beginning of the acceleration phase the manipulated variable is stored and at the end of the acceleration phase the manipulated variable is set to a value derived from a value at the beginning of the acceleration phase. For example, the value of the manipulated variable at the beginning of the Acceleration phase present value.

Dadurch, dass der Beginn und das Ende der Bescheunigungsphase von der Bewegungssteuerung an die Registerregeleinrichtung gemeldet wird, sind keine zusätzlichen Geschwindigkeitsmessgeber erforderlich, was zu entsprechenden Kostenvorteilen führt. Die Reglertätigkeit bleibt während der Beschleunigungsphase erhalten und minimiert so die Makulatur. Wird die Stellgröße nach der Beschleunigungsphase wieder auf den Wert beim Beginn der Beschleunigungsphase oder einen daraus abgeleiteten Wert gestellt, so liegt sofort ein für konstante Geschwindigkeiten geeigneter Wert der Stellgröße vor. Dies ist möglich, da die Stellgrößen für unterschiedliche konstante Geschwindigkeiten weitestgehend gleich sind und nurfür Beschleunigungsphasen größere Abweichungen davon auftreten. Das Zurücksetzen der Stellgröße auf den Wert vor der Beschleunigungsphase führt somit viel schnellerzu einem geeigneten Wert der Stellgröße bei konstanter Geschwindigkeit, als dies durch den Regelkreis alleine durch die Regeltätigkeit des Reglers erfolgen würde.Characterized in that the beginning and the end of Bescheunigungsphase is reported by the motion control to the register control device, no additional speed encoders are required, which leads to corresponding cost advantages. The regulator activity is maintained during the acceleration phase, thus minimizing waste. If the manipulated variable is reset to the value at the beginning of the acceleration phase or a value derived therefrom after the acceleration phase, a value of the manipulated variable suitable for constant speeds is immediately available. This is possible because the manipulated variables for different constant speeds are largely the same and only for acceleration phases larger deviations occur. Resetting the manipulated variable to the value before the acceleration phase thus leads much faster to a suitable value of the manipulated variable at constant speed, as would be done by the control loop alone by the control activity of the controller.

Die Reaktion der der Registerregelung auf die Beschleunigungsinformation während der Beschleunigungsphase kann dabei entsprechend den oben beschriebenen Ausführungen erfolgen.The reaction of the register control on the acceleration information during the acceleration phase can be carried out according to the embodiments described above.

Zeichnungendrawings

Die Erfindung wird im Folgenden anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert. Es zeigen:

  • Figur 1 in schematischer Darstellung eine Bewegungssteuerung mit einer externen Registerregelung,
  • Figur 2 eine schematische Darstellung der Bewegungssteuerung mit einer internen Registerregelung,
  • Figur 3 die Registerregelung mit einer Umschaltung zwischen Sätzen von Regelparametern,
  • Figur 4 die Registerregelung mit einer Umschaltung zwischen Korrekturprofilen.
The invention will be explained in more detail below with reference to the exemplary embodiments illustrated in the figures. Show it:
  • FIG. 1 a schematic representation of a motion control with an external register control,
  • FIG. 2 a schematic representation of the motion control with an internal register control,
  • FIG. 3 the register control with a switch between sets of control parameters,
  • FIG. 4 the register control with a changeover between correction profiles.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Figur 1 zeigt eine Registerregelung 1 mit einer Bewegungssteuerung 24 für eine Druckwalze 20 mit einer externen Registerregelung 1. Die Registerregelung 1 wirkt hierbei über eine Stellgröße 11 auf einen Umrichter 23, der einen Antriebsmotor 21 versorgt, der wiederum die Druckwalze 20 bewegt. Die Bewegung des Antriebsmotors 21 wird von einem Drehwinkelgeber 22 registriert und über den Umrichter 23 an die Bewegungssteuerung 24 weitergeleitet. Die Registerregelung 1 erhält von der Bewegungssteuerung 24 ein Beschleunigungssignal 13. Das Beschleunigungssignal 13 kann dabei binär (z.B. als Signal "Geschwindigkeitssollwert erreicht") oder als analoges Signal, das den Istwert der Beschleunigung repräsentiert, übertragen werden. FIG. 1 shows a register control 1 with a motion controller 24 for a platen roller 20 with an external register control 1. The register control 1 acts here via a manipulated variable 11 to a converter 23, which supplies a drive motor 21, which in turn moves the pressure roller 20. The movement of the drive motor 21 is registered by a rotary encoder 22 and forwarded via the inverter 23 to the motion controller 24. The register control 1 receives from the motion controller 24 an acceleration signal 13. The acceleration signal 13 can be binary (eg as the signal "speed setpoint reached") or as an analog signal representing the actual value of the acceleration transmitted.

Figur 2 zeigt eine Registerregelung 1, die in die Bewegungssteuerung 24 integriert ist. Sowohl das Beschleunigungssignal 13 als auch die Stellgröße 11 treten nur innerhalb der Bewegungssteuerung 24 auf, wodurch eine aufwändige Kommunikation zwischen unterschiedlichen Modulen entfallen kann. In einer Weiterbildung kann das Beschleunigungssignal 13 zeitgleich mit dem Signal für eine Geschwindigkeitsänderung des Antriebes erzeugt werden. Der zeitliche Versatz durch die Auswertung des Drehwinkelgebers 22 kann dann entfallen. FIG. 2 shows a register control 1, which is integrated in the motion controller 24. Both the acceleration signal 13 and the manipulated variable 11 occur only within the motion control 24, whereby a complex communication between different modules can be omitted. In a further development, the acceleration signal 13 can be generated simultaneously with the signal for a speed change of the drive. The time offset by the evaluation of the rotary encoder 22 can then be omitted.

Die Figur 3 zeigt eine Registerregelung 1 mit einer Registerregeleinrichtung 10, die eine Stellgröße 11 an die übergeordnete Steuerung abgibt. Ein Beschleunigungsgeber 12 gibt das Beschleunigungssignal 13 an die Registerregeleinrichtung 10 und an einen Umschalter 14 ab. Bei einer konstanten Drehgeschwindigkeit der Druckwalze wirkt auf die Registerregeleinrichtung 10 ein erster Satz von Regelparametern 16. Zeigt das Beschleunigungssignal 13 eine Abweichung von der konstanten Drehgeschwindigkeit an, schaltet der Umschalter 14 auf einen zweiten Satz von Regelparametern 15 um. Diese Regelparameter 15 können dynamischer oder weniger dynamisch als die Regelparameter 16 bei konstanter Geschwindigkeit gewählt sein.The FIG. 3 shows a register control 1 with a register control device 10, which outputs a manipulated variable 11 to the higher-level control. An acceleration sensor 12 outputs the acceleration signal 13 to the register control device 10 and to a changeover switch 14. At a constant rotational speed of the pressure roller acts on the register control device 10, a first set of control parameters 16. If the acceleration signal 13 indicates a deviation from the constant rotational speed, the switch 14 switches to a second set of control parameters 15. These control parameters 15 may be selected to be more dynamic or less dynamic than the control parameters 16 at constant speed.

Die Figur 4 zeigt eine Registerregelung 1 mit einer Registerregeleinrichtung 10, bei der der Umschalter 14 zwischen einem Korrekturprofil 18 bei konstanter Geschwindigkeit und einem Korrekturprofil 17 während einer Bescheunigungsphase auswählt. Das Beschleunigungssignal 13 kann auch dazu verwendet werden, die Stellgröße 11 zu Beginn der Beschleunigungsphase zu speichern. Die Registerregeleinrichtung 10 kann dann während der Beschleunigungsphase weiter regeln und bei deren Ende den Wert der Stellgröße 11 rücksichern.The FIG. 4 shows a register control 1 with a register control device 10, wherein the switch 14 selects between a correction profile 18 at a constant speed and a correction profile 17 during a Bescheunigungsphase. The acceleration signal 13 can also be used to store the manipulated variable 11 at the beginning of the acceleration phase. The register control device 10 can then continue to regulate during the acceleration phase and restore the value of the manipulated variable 11 at its end.

Je nach Einsatzzweck können mehrere Maßnahmen kombiniert werden. Beispielsweise kann die Umschaltung auf dynamischere Regelparameter 15 mit einer Speicherung der Stellgröße 11 bei Beginn der Beschleunigung und deren Rücksicherung bei Ende der Beschleunigungsphase vorteilhaft kombiniert werden.Depending on the application, several measures can be combined. For example, the switching to more dynamic control parameters 15 with a storage of the manipulated variable 11 at the beginning of the acceleration and its restoration at the end of the acceleration phase can be advantageously combined.

Insgesamt kann durch die dargestellten Verfahren oder eine Kombination davon eine Verringerung des Ausschusses in Beschleunigungsphasen erreicht werden.Overall, by the illustrated method or a combination thereof, a reduction of the committee can be achieved in acceleration phases.

Registerregelungregister control

11
Registerregelungregister control
1010
RegisterregleinrichtungRegis Terre sliding direction
1111
Stellgrößemanipulated variable
1212
Beschleunigungsgeberacceleration sensor
1313
Beschleunigungssignalacceleration signal
1414
Umschalterswitch
1515
Regelparametercontrol parameters
1616
Regelparameter bei konstanter GeschwindigkeitControl parameters at constant speed
1717
Korrekturprofilcorrection profile
1818
Korrekturprofil bei konstanter GeschwindigkeitCorrection profile at constant speed
2020
Druckwalzeplaten
2121
Antriebsmotordrive motor
2222
DrehwinkelgeberRotary encoder
2323
Umrichterinverter
2424
Bewegungssteuerungmotion control

Claims (7)

  1. Method for register control for a multicolour rotary press in an acceleration phase, having at least one register control device (10) with a first set of control parameters (16) for operation at constant speed, and having a movement controller (24) for controlling the press roll speed, characterized in that, in the acceleration phase, the register control device (10) has applied to it at least one fixed set of control parameters (15) which differs from the first set of control parameters (16) for operation at constant speed.
  2. Method according to Claim 1, wherein, in the acceleration phase, a second correction profile (17) is used, which differs from a first correction profile (18) for operation at constant speed.
  3. Method according to Claim 1 or 2, wherein information about the presence of the acceleration phase is given to the register control device (10) by the movement controller (24) as an acceleration signal (13).
  4. Method according to Claim 3, wherein the acceleration signal (13) is given to the register control device (10) by the movement controller (24) as a binary signal.
  5. Method according to Claim 3, wherein the acceleration signal (13) is given to the register control device (10) by the movement controller (24) as a signal proportional to the acceleration.
  6. Method according to one of the preceding claims, wherein information about a start and an end of the acceleration phase is given to the register control device (10) by the movement controller (24) and, at the start of the acceleration phase, the actuating variable (11) is stored and, at the end of the acceleration phase, the actuating variable (11) is set to a value which is derived from the stored value.
  7. Method according to Claim 6, characterized in that the actuating variable (11) is set to the stored value.
EP06013301.4A 2005-07-19 2006-06-28 Register control device Not-in-force EP1745925B2 (en)

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DE102005033585A1 (en) * 2005-07-19 2007-02-01 Bosch Rexroth Aktiengesellschaft register control
DE102007024323A1 (en) * 2007-05-24 2008-11-27 Robert Bosch Gmbh Method for the dynamic adjustment of a printing machine module for correcting a first index comprises changing the first register and decoupling further registers using a first correction value for the module
DE102007017095A1 (en) * 2007-04-10 2008-10-16 Robert Bosch Gmbh Method for operating a printing machine
DE102007017096A1 (en) * 2007-04-10 2008-10-16 Robert Bosch Gmbh Dynamic adjusting method for e.g. pneumatic cylinder of gravure printing press, involves isolating additional registers from dynamic adjustment by interconnection of correction values for additional printing press modules
DE102007059066A1 (en) * 2007-12-07 2009-06-10 Robert Bosch Gmbh Axis correction method for a processing machine and a processing machine
KR100953475B1 (en) * 2008-02-19 2010-04-16 건국대학교 산학협력단 Ultra-Precision Register Control Method for Roll-to-Roll Printing of Electronic Devices Continuous Process
DE102008058964A1 (en) 2008-11-25 2010-05-27 Robert Bosch Gmbh Method for controlling a processing machine with at least one control device
GB2493750A (en) * 2011-08-17 2013-02-20 Edwards Ltd Apparatus for treating a gas stream
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DE102005033585A1 (en) 2007-02-01
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US20070017398A1 (en) 2007-01-25
US7552678B2 (en) 2009-06-30
EP1745925A2 (en) 2007-01-24
DE502006005015D1 (en) 2009-11-19

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