EP0095649A2 - Ink feed control device for a printing press - Google Patents

Abstract

In a device for influencing the coloring on printing machines, color density values determined on the printed product are displayed on a screen terminal (6). After checking by the printer, the color density measurement values are released for further processing by entering a command. From the color density deviations calculated in a target / actual value comparison, new control variables for color control elements (12 and 15) are formed depending on the tolerance after linking with control values. These show absolute control paths of the color control elements (12 and 15) in size and direction as well as their actuating movement on a control panel (11) of leading light elements (35) and numbers in guide displays (19 and 37). Both guide displays (19 and 37) can be switched over to display the actual positions of the color control elements (12 and 15) and the guide display (37) to color density trend displays, and both are coupled to a positioning device (28) for tracking the color control elements (12 and 15) individually or at least one printing unit. There is a choice between a tracking control for a single automatic tracking for continuous, automatic or a remote control for manual tracking of the color control elements (12 and 15). Any color zone actuators (12) can be excluded from the tracking control or automatic tracking by means of a device (29) for selectively locking and releasing color zones. The setup works with computer support.

Description

The invention relates to a device for controlling the automatic influencing of the coloring on printing presses using at least one color density measuring device, a device for target / actual value comparison, at least one electronic computer for linking the measured values with control values and devices for dosing the ink supply to the printing plate, consisting of Color metering elements with associated setting and feedback devices and displays for the actual position values of the color metering elements.

DE-AS 27 28 738 describes a device for checking and regulating the coloring on printing presses, in which the color control is carried out fully automatically by means of a composite system of microcomputers and the person is deliberately excluded as a delaying and - since in his judgment subjective - as a faulty part of the control loop becomes. As a result, the valuable specialist knowledge and the experience of the printer acquired over many years is completely lost to the printing process, since there is no longer any possibility for the printer to intervene in the color control cycle to correct the quality. Even if due to a faulty color density measurement due to failure or contamination of the densitometer, e.g. due to clogging with paper dust or due to local errors in the coloring, such as water noses, slugs etc., which are not necessarily determined and controlled by a spatially limited, automatic color density measurement with subsequent automatic control corrective action would be necessary, this is not immediately possible. Only if the command has not been carried out correctly are the set positions of the ink metering elements and their actual positions subsequently determined by means of a repeated comparison, which - only if they exceed a certain level - trigger a warning signal that the printer has an error, For example, the hang of a partial ink knife section, the jamming of an adjusting screw or the burning of an actuator should signal. A control during the adjustment of the ink zone actuators is not available to the operator of the printing press, so that the subsequent signaling of sources of error results in a completely unnecessary delay in color optimization with macula Accuracy occurs despite automatic control and adversely affects the color quality of the printed product. Nevertheless, the presence of the operator can still not be carried out, since he has to monitor the supposedly automatic regulation of the coloring and react to error or alarm signals.

In contrast, it is proposed in DE-AS 27 27 426 to provide a device for controlling the ink supply of a sheet-fed offset printing press with a display device for displaying the color density deviations from actual color density values measured on the printed product compared to predetermined color density target values, the color density deviations all ink zones are displayed simultaneously as a deviation profile that is connected across the entire width of the printed product. As a result, the printer is given indirect reference values about the size and direction of the adjustment to be made as a recommendation, on the basis of which he can orient himself when adjusting the color control elements, whereby his personal assessment of the quality of the printed product based on visual assessment to form targeted, optimizing control interventions in the coloring and compensation of disturbance variables that cannot be measured are left with sufficient space. However, since the deviations are displayed in ink density values, it can only be checked after the next ink density measurement of a printing sheet removed from the printing press that the adjustment or tracking of the ink zone actuators has been carried out to the desired extent, which means that there is no slight waste can be completely excluded.

Proceeding from this prior art, the object of the invention is to create a device which deliberately involves the printer in the process of coloring and displays concrete reference values for the absolute travel of the ink zone actuators without having to forego the advantages of automatic coloring. and, on the one hand, monitoring the color density measured values as a supplement to the automatic density measured value recording and, on the other hand, also an immediate check during the adjustment of the ink zone actuators for predetermined position setpoints, ie total monitoring of the execution of the control commands - not only quantitatively but also qualitatively - immediately enabled.

According to the invention, this object is achieved in that guide displays assigned to the ink metering elements are provided for representing manipulated variables of all ink actuators in each printing unit, which give the operator precise recommendations for guiding the ink actuators to predetermined setpoint position values and give them their absolute adjustment paths both in Signalize size and direction and that a guide device selectable by the operator for tracking the ink actuators is coupled individually or at least one printing unit to the guide displays.

Such a device guarantees the fastest possible color optimization of the printed product with a minimum of waste, since the manipulated variables - already implemented in absolute travel of the ink actuators - are displayed precisely before they are updated. Although the printer does not have to do without the advantages of automatic color control, he always has the opportunity to bring his experience into the printing process.

In order to enable direct control of the color quality of the printed product without any additional constructive effort, the displays of the actual position values of the ink zone metering elements and / or the guide displays of the manipulated variables of all ink zone actuators can optionally be switched to color density trend displays, the same display means being provided for all three displays are.

In an advantageous embodiment of the invention, the guide displays are additionally designed to reproduce the actuating movements of the color actuators. Only through the direct visual representation of the actuating movements is there direct monitoring and absolute control already during the tracking of the color actuators regarding uncompleted or incomplete execution of actuating commands.

In a further development of the inventive concept, the values of the target positions of the ink zone actuators are transformed to a common reference line in the guide displays and the actual positions of the ink zone actuators in the form of a tracking profile by means of the leading lighting elements as Position deviations from the values of the target positions of the reference line can be represented. As a result, both the position deviations of the ink zone actuators from their specified target positions and any remaining position deviations due to improper execution of the actuation commands are signaled precisely according to size and direction, which in turn enables immediate correction interventions in the coloring - completely independently of further color density measurements.

In a further development of the inventive idea, it is preferably proposed that the color density measuring device be equipped with a device for releasing measured values, for releasing and forwarding both the color density measurement data after their checking and acceptance by the operator and predetermined color density target values to the positioning device. Among other things, this enables the printer a precise control of the results of the previous color density measurement and the elimination of unlikely, extreme measured values as well as performing repeat measurements.

In order to consciously exclude individual or several ink zone actuators in individual or several printing units from a tracking and to carry them out separately - if necessary, taking into account locally occurring errors in the color quality that are not always ascertainable due to a color density measurement that is spatially limited to a print control strip - a device is optional Locking and unlocking of ink zones are provided, by means of which any ink zone actuators, one or more printing units in each case, can be deliberately excluded from the tracking control or the automatic tracking system and released again for this, the manual tracking by means of the remote control being retained.

According to the characterizing features of subclaims 8 to 10, the printer has the freedom of choice between a tracking control for one-time tracking of the ink zone actuators, an automatic tracking system for continuous, automatic tracking of the inking zone actuators or a remote control for manual tracking of individual inking zone actuators, so that he thereby has the advantages of fully automatic control with a human experience enriched can combine manual control.

Further advantageous refinements of the inventive concept are contained in the following description and in subclaims 2, 4, 6, 9 and 14 to 16.

The invention is explained in more detail below on the basis of a basic embodiment of a device for influencing the coloring on printing machines shown in the drawings.

• Fig. I eine stark schematisierte Darstellung einer Grundausführung der erfindungsgemäßen Einrichtung und
• Fig. 2 einen Ausschnitt aus einer Einrichtung gemäß Fig. 1, dargestellt als schematisiertes Blockschaltbild.

It shows:

• I is a highly schematic representation of a basic embodiment of the device according to the invention and
• Fig. 2 shows a section of a device according to FIG. 1, shown as a schematic block diagram.

According to FIG. 1, a color density measuring device 1 or 2 of known design is connected to a first microcomputer 3. This can be an ink density measuring device 1 arranged outside the printing press or a color density measuring device 2 arranged directly in the printing press on a cylinder 4 carrying the printed product. The color density measuring device 1 or 2 can work in the off-line or on-line mode and can be equipped with either one or more densitometers 5. In a sheetfed offset press, for example the use of an 'ink density measuring device according to the one described in DE-OS 26 32 017 is conceivable, during which a web offset printing press could be equipped with one or more machine densitometers according to DE-OS 2 401 750.

The microcomputer 3 controls the color density measuring device 1 or 2 and is provided with a screen terminal 6 and with its own operating unit 7 for entering measuring programs and for specifying and storing color density setpoints. The measurement programs to be entered are based in particular on the type and structure of a known pressure control strip on the print medium to be measured, which arrangement is not shown and described in detail, however, and in the case of machine measurement on the speed of the print medium, etc. Except the microcomputer 3 is equipped with a device for the release of measured values 8, which can be activated by means of a release switch 17 arranged on the operating unit 7. The operator of the color density measuring device 1 or of the printing press with the color density measuring device 2 has the possibility of having the determined color density measured values displayed on the screen terminal 6 and only releasing them for further processing after checking and acceptance by actuating the switch 17.

The microcomputer 3 is followed by a multiplexing device 45, which is connected to one or more second microcomputers 10 via one or more serial interfaces 9, the number of interfaces 9 and microcomputers 10 being dependent on the number of printing machines to be controlled or regulated. Both microcomputers 3 and 10 are used in a decentralized manner and are equally important in terms of their task and mode of operation. Of course, the use of a central microcomputer system with at least one hierarchically superordinate central microcomputer is of course also possible. The microcomputer 10 is coupled to a control desk 11 for the purpose of data exchange and to actuators 12 and feedback potentiometers 13 of color zone metering elements 14 indicated purely schematically and per printing unit with a drive 15 of a color metering element 16 which is superior to the individual color zones, for adjusting the total amount of color, as shown in FIG. 1 a color sensor, and a feedback potentiometer 44 associated therewith.

As shown in FIG. 2, the microcomputer 10 is subdivided into sub-units 21 to 28, an electronic evaluation unit 22 with a data memory 23 being connected downstream of the test electronics 21, which in turn are coupled to control electronics 24 for the purpose of common data exchange. The evaluation electronics 22 and the control electronics 24 are followed by a common display electronics 25, which is connected to the control panel 11. The control electronics 24 is also coupled to the control panel 11 and a downstream multiplexing device 26, which leads both to the servomotors 12 and feedback potentiometers 13 of the ink zone actuators 14 and to the drive 15 of the ink duct 16 and its feedback potentiometer 44. The control electronics 24 is logic electronics 27 are connected upstream, which are controlled via a positioning device 28 and a device 29 for optionally blocking and releasing color zones.

The positioning device 28 contains a selection keyboard with a command input key 30 for triggering a tracking control for one-time tracking as well as a command input key 31 for triggering an automatic tracking system for continuous, automatic tracking of the ink zone actuators 12 and / or ink actuators 15 for the total amount of color. A command input key 33 of the device 29 serves to lock and release the ink zone actuators 12 of individual ink zones from their tracking.

The selection keyboard 30, 31 and 33 of both the positioning device 28 and the device 29 for optionally locking and releasing color zones is preferably arranged directly on the control panel 11. The control panel 11 also contains a number of guide displays 37 corresponding to the number of ink zones for displaying the manipulated variables of all ink zone actuators 12, each of which is assigned a lock indicator 38 and a remote control keyboard 39 for the ink zone actuators 12, and a guide display 19 for displaying the manipulated variables of the ink actuators 15 for the color ductors 16 with the associated setting keyboard 20.

When checking a multi-color printing machine, the control desk 11 is equipped, according to the schematic illustration in FIG. 1, with a printing unit selection keyboard 18, with which the individual printing units are selectively used to display the previously mentioned measurement and control values and to track their color control elements (12 and 15). can be selected. By pressing one of the printing unit buttons - the number of which corresponds to the printing units to be checked - the guide displays 19 and 37, color density trend displays and displays of the actual position values of the ink metering elements 14 and 16 can be switched to the selected printing unit, i.e. whose values are based on the printing unit.

The guide displays 37 consist of vertical rows of light-emitting diodes 40, each row of light-emitting diodes 40 in the embodiment shown in FIG Example is equipped with sixteen LEDs 35. The values of the target positions of the ink zone actuators 12 reported by the evaluation electronics 22 are transformed in a standardized representation to a common reference line 41, which functions as a zero line in the guide displays 37. So that the values of the actual positions of the ink zone actuators 12 are as equally large as possible as deviations from the reference line 41 both in the plus and in the minus range, the LEDs 35 arranged in the middle in the rows 40 of light-emitting diodes 40 are used as far as possible , in the embodiment of Figure 2, the eighth light emitting diode. The values of the actual positions of the ink zone actuators 12, which are analogous to those of the ink zone metering elements 14, are shown in a coherent tracking profile 42 as position deviations from this reference line 41.

The blocking displays 38 are equipped with larger light-emitting diodes or those with a different coloration for better differentiation from the guide displays 37. So you will see the guide displays 37 e.g. red and the lock indicators 38 light up green.

The guide display 19 for representing the manipulated variable of the color duct 16 is designed as a numerical display 36 with seven-segment displays and is identified by a color duct setting symbol 43.

• Beim Einrichten bzw. Voreinstellen der Druckmaschine werden dem Mikrocomputer 3 Farbdichte-Sollwerte nebst zugehörigen Toleranzen des zu fertigenden Druckproduktes entweder manuell über die Bedieneinheit 7 oder automatisch über einen nicht dargestellten und näher beschriebenen Datenspeicher, wie z.B. Kassette, Magnetkarte oder Speicherplatte usw., eingegeben. Während des laufenden Druckprozesses wird nun der Druckmaschine vom Bedienungspersonal in beliebig wählbaren Zeitabständen ein Bogen entnommen und auf dem Meßtableau unterhalb der Farbdichtemeßvorrichtung 1 plaziert. Gemäß dem über die Bedieneinheit 7 in den Mikrocomputer 3 zuvor eingegebenen Meßprogramm wird nun der auf dem Bogen mitaufgedruckte Druckkontrollstreifen in Abhängigkeit von der Art, Anzahl und Struktur dessen Meßfelder sowie der Anzahl der aufgedruckten Farben usw. ausgemessen.

The operation and mode of operation of the device according to the invention is explained in more detail below:

• When setting up or presetting the printing machine, 3 color density setpoints and associated tolerances of the print product to be produced are entered into the microcomputer either manually via the control unit 7 or automatically via a data memory (not shown and described in more detail), such as a cassette, magnetic card or storage disc, etc. During the ongoing printing process, the operator now removes a sheet from the printing machine at any time interval and places it on the measuring table below the ink density measurement device 1 placed. According to the measurement program previously entered into the microcomputer 3 via the control unit 7, the print control strip which is also printed on the sheet is now measured in dependence on the type, number and structure of its measurement fields and the number of colors printed on, etc.

As an alternative to this, as indicated in FIG. 1, the color density measurement can also be carried out by the color density measuring device 2 arranged directly in the printing press on the sheet-guiding cylinder, in the exemplary embodiment shown the printing cylinder 4.

The actual color density values of the sheet determined by the color density measuring device 1 or 2 are now transmitted to the microcomputer 3 and collected therein. Both the preset and stored color density setpoints and tolerances as well as the measured and collected actual color density values of the sheet can be displayed on demand in the screen terminal 6 and / or can also be printed out in a log printer (not shown and described in more detail). The operator now has the option, as a supplement to the automatic density measurement value acquisition, to compare and critically assess the actual color density values of the sheet with the specified color density setpoints and, in particular, with the color quality of the sheet on the basis of his specialist knowledge and experience. By selecting the color density values, he can, in cases of doubt, eliminate extreme or seemingly untrustworthy measurement values and repeat the color density measurement.

Only after the printer considers and accepts the displayed color density values as good should he actuate the release switch 17, whereby the device for measuring value release 8 is activated and the stored color density values via the multiplexing device 45 and the serial interface (s) 9 to the or the microcomputers 10 are transferred. The test electronics 21 of the microcomputer 10 checks the data transmission for possible errors and faults. The downstream evaluation electronics 22 lead between those transmitted to it Color density data through a target / actual value comparison and calculates the color density deviations. At the same time, the feedback potentiometers 13 and 44 report the actual values of the positions of the color actuators 12 and 15 via the multiplexing device 26. The evaluation electronics 22 links the measured values with the control values and now calculates the desired target positions from the values of the color density deviations, taking into account the permissible tolerances and the values of the actual positions of the color control elements 12 and 15, stores these values in the data memory 23 and brings them on the one hand together and coherently in the tracking profile 42 of the guide displays 37 and on the other hand in the guide display 19 for display.

When the measured values are linked to the manipulated values, the values of the actual positions of the ink metering elements 14, which are reported as analog voltages, represent a measure of their distance Δs or, analogously, a measure of the revolutions of their servomotors 12. In relation to the measured actual values the color density, the path dimension Δ s is converted into a corresponding number of light-emitting diodes 35 as a display signal. In the same ratio, the color density difference L1D determined in the previous setpoint / actual value comparison is also converted into Δs and into a corresponding number of light-emitting diodes 35. The desired positions of the color control elements 12 now result from the addition of the light-emitting diode values determined from the actual positions of the color control elements 12 with the light-emitting diode values determined from the color density difference Δ D. A digital value display for the ink duct 16 takes place in the numerical display 19.

By the measure that the reference line 41 is placed evenly on the middle, in the present embodiment according to FIG. 2, on the eighth light-emitting diode 35 of each row of light-emitting diodes 40, there is approximately the same size of the display area both in the negative and in the positive direction.

The guide displays 19 and 37 thus provide the operator of the printing machine with a guide element for the adjustment of the ink actuators 12 and 15, which gives him both the direction and the size thereof required travel paths signaled precisely so that he can position the color metering elements 14 and 16 exactly, and also a control element by means of which he can also directly monitor the correct execution of the tracking process. Of course, there is the possibility for the printer to specify arbitrarily selectable tolerance limits within which the position deviations of the color actuators 12 and 15 can move without their additional tracking being necessary. The width of the tolerance band is variable according to the respective circumstances.

The guide displays 19 and 37 can also be switched such that the operator can also have the current actual positions of the color actuators 12 and 15 and, in addition, the color density trends in the guide displays 37 as decision aids for influencing the coloring, in order to draw conclusions directly therefrom to draw the color density curve of the printed product. Thus, he can infer unusual color density measurement values or incorrect density measurement value recording due to unusual deviations in the density gradient.

• 1. Er akzeptiert nach einer genauen Kontrolle die ihm in den Führungsanzeigen 19 und 37 signalisierte Nachführempfehlung und übernimmt deren Werte kompromißlos für alle oder einzelne Druckwerke.
  • a) Er betätigt die Befehlseingabetaste 30 der Positioniereinrichtung 28, wodurch die Nachführsteuerung zum einmaligen Nachführen der Farbstellglieder 12 und/oder 15 aktiviert wird. Dadurch werden die Farbstellglieder 12 und/oder 15 über die Steuerelektronik 24 einmalig nachgeführt, und der Drucker muß nach der nächsten Bogenentnahme, Farbdichtemessung mit anschließender Meßwertfreigabe und wiederholten Führungsanzeigen 19 und 37 eine neue Entscheidung mit Befehlseingabe treffen.
  • b) Er betätigt die Befehlseingabetaste 31 der Positioniereinrichtung 28, wodurch die Nachführautomatik zum kontinuierlichen, automatischen Nachführen der Farbstellglieder 12 und/oder 15 aktiviert wird. Dadurch werden die Farbstellglieder 12 und/oder 15 entsprechend den in der Auswerteelektronik 22 nach jeder Farbdichtemessung immer wieder neu gebildeten Stellwerten über die Steuerelektronik 24 solange nachgeführt, bis dieser Befehl wieder aufgehoben und ein neuer über die Befehlseingabetaste 31 eingeleitet wird. Vollkommen unabhängig davon muß jedoch stets eine neue Entscheidung bei der als Kontrollorgan fungierenden Einrichtung zur Meßwertfreigabe 8 gefällt werden.
• 2. Er akzeptiert nach Überprüfung die in den Führungsanzeigen19 und 37 angezeigten Positions-Abweichungswerte der Farbstellglieder 12 und/oder 15 nur teilweise und möchte einzelne Farbzonen, gegebenenfalls einzelne Druckwerke mit z.B. ihm zweifelhaft erscheinenden extrem hohen oder niedrigen Anzeigewerten, bewußt von der Nachführung ausnehmen. In diesem Fall drückt er die Befehlseingabetaste 33, wodurch die Vorrichtung 29 zum Sperren oder Freigeben einzelner Farbzonen aktiviert wird. Über die Verknüpfungselektronik 27 wird dieser Befehl in die Steuerelektronik 24 und von dort in das Kontrollpult 11 eingeleitet. Durch Drücken der Minustasten der Fernbedienungstastatur 39 kann der Drucker nun beliebige Farbzonen bzw. Druckwerke sperren, durch Betätigung der Plustasten Sperrungen aufheben. Die Sperrung bzw. die Freigabe der Farbzonen wird ihm durch die jeweils aufleuchtenden Sperranzeigen 38 signalisiert. Der Drucker hat nun die Möglichkeit, die Farbzonendosierelemente 14 der nicht gesperrten Farbzonen, wie unter Punkt l.a) beschrieben, durch einmalige Nachführsteuerung oder gemäß Punkt l.b) durch kontinuierliche Nachführautomatik deren Farbzonenstellglieder 12 zu positionieren.
• 3. Darüber hinaus hat er die Möglichkeit, die Farbzonenstellglieder 12 der Farbzonendosierelemente 14 gesperrter und nicht gesperrter Farbzonen mittels Betätigung der Fernbedienungstastatur 39 manuell nachzuführen. Unabhängig davon, welche Wahl der unter den Punkten 1.-3. zuvor beschriebenen Möglichkeiten der Drucker für das Positionieren der Farbdosierelemente 14 und 16 trifft, kann er nach der Befehlseinleitung über die Befehlseingabetasten 30 und 31 der Positioniereinrichtung 28 die korrekte Ausführung seiner Stellbefehle mittels der Führungsanzeigen 19 und 37 genau überwachen. Da die Leuchtdioden 35 der Führungsanzeigen 37 als führende Leuchtelemente ausgebildet sind und die Stellbewegung der Farbzonenstellglieder 12 - analog der Farbzonendosierelemente 14 - für den Drucker sichtbar reproduzieren läßt sich dadurch beispielsweise direkt das Öffnen und Schließen der Farbzonendosierelemente 14 beobachten. Im gleichen Maße, wie sich die Farbzonenstellglieder 12 ihren Soll-Positionen nähern, nähern sich auch die Werte der Führungsanzeigen 37, d.h. die die Ist-Positionen signalisierenden, führenden Leuchtelemente 35 der Bezugslinie 41. Dadurch hat der Drucker nicht nur eine genaue Kontrollmöglichkeit darüber, daß sich die Farbzonendosierelemente 14 in den betreffenden Farbzonen verstellen, sondern insbesondere auch, ob die Größe der Stellbewegung entsprechend den gegebenen Stellbefehlen ordnungsgemäß ausgeführt worden ist. Durch die qualitative Anzeige des absoluten Größenwertes der erforderlichen Verstellung kann er somit nicht nur den totalen Ausfall eines Stellmotores, sondern auch schon das geringe Klemmen einer Stellschraube oder eines Farbmessers, d.h. bereits kleinste Abweichungen in der Ausführung des Stellbefehles feststellen und unmittelbar eine manuelle Korrekturverstellung in dieser Farbzone einleiten.
• 4. Soll die Gesamtfarbmenge gleichmäßig beeinflußt werden, so besteht in Analogie zu Punkt 3 die manuell ausführbare Möglichkeit, den Drehwinkel des Farbduktors 16 entsprechend seiner in der Führungsanzeige 19 gegebenen Nachführempfehlung - oder abweichend davon - über die Stelltastatur 20 zu variieren, d.h. durch Drücken der Plus-Taste zu erhöhen und vice versa, um dadurch die Farbstreifenlänge zu verändern.

On the basis of the guide displays 19 and 37, the operator of the printing press can now decide among several options for tracking the ink actuators 12 and 15 to their desired positions.

• 1. After a precise check, he accepts the follow-up recommendation signaled to him in guidance displays 19 and 37 and uncompromisingly accepts their values for all or individual printing units.
  • a) He actuates the command input button 30 of the positioning device 28, whereby the tracking control for the one-time tracking of the color actuators 12 and / or 15 is activated. As a result, the ink actuators 12 and / or 15 are adjusted once via the control electronics 24, and the printer has to make a new decision by entering the command after the next sheet removal, ink density measurement with subsequent measurement value release and repeated guidance displays 19 and 37.
  • b) He actuates the command input key 31 of the positioning Direction 28, whereby the automatic tracking for continuous, automatic tracking of the color actuators 12 and / or 15 is activated. As a result, the color control elements 12 and / or 15 are tracked again and again via the control electronics 24 in accordance with the control values newly formed in the evaluation electronics 22 after each color density measurement until this command is canceled again and a new one is initiated via the command input key 31. Completely independently of this, however, a new decision must always be made at the device for measuring value release 8 which acts as a control organ.
• 2. After checking, he only partially accepts the position deviation values of the ink actuators 12 and / or 15 shown in the guide displays 19 and 37 and wants to consciously exclude individual ink zones, possibly individual printing units with extremely high or low display values, which he considers dubious. In this case, he presses the command key 33, thereby activating the device 29 for locking or unlocking individual color zones. Via the link electronics 27, this command is introduced into the control electronics 24 and from there into the control panel 11. By pressing the minus buttons on the remote control keyboard 39, the printer can now lock any color zones or printing units, and unlocks by pressing the plus buttons. The blocking or the release of the color zones is signaled to him by the respectively illuminating blocking displays 38. The printer now has the option of positioning the ink zone metering elements 14 of the unlocked ink zones, as described under item la), by means of a single tracking control or, according to item 1b), by means of continuous automatic adjustment of their ink zone actuators 12.
• 3. In addition, he has the option of manually tracking the ink zone actuators 12 of the ink zone metering elements 14 of locked and unlocked ink zones by actuating the remote control keyboard 39. Regardless of which choice of the under 1.-3. previously described possibilities of the printer for positioning the color metering elements 14 and 16, he can monitor the correct execution of his positioning commands by means of the guide displays 19 and 37 after the command has been initiated via the command input keys 30 and 31 of the positioning device 28. Since the light-emitting diodes 35 of the guide displays 37 are designed as leading light-emitting elements and the positioning movement of the ink-zone actuators 12 - analogously to the ink-zone metering elements 14 - can be reproduced by the printer so that, for example, the opening and closing of the ink-zone metering elements 14 can be observed directly. To the same extent as the ink zone actuators 12 approach their target positions, the values of the guide displays 37, ie the leading light elements 35 of the reference line 41 signaling the actual positions, also approach. As a result, the printer not only has precise control over it, that the ink zone metering elements 14 are adjusted in the respective ink zones, but in particular also whether the size of the actuating movement has been carried out correctly in accordance with the given actuating commands. Through the qualitative display of the absolute size of the required adjustment, he can not only determine the total failure of a servomotor, but also the slight jamming of an adjusting screw or a colorimeter, i.e. even the smallest deviations in the execution of the actuating command and immediately determine a manual correction in this Initiate color zone.
• 4. If the total amount of color is to be influenced uniformly, there is, in analogy to point 3, the manually executable possibility of varying the angle of rotation of the color duct 16 according to its tracking recommendation given in the guide display 19 - or differently therefrom - via the setting keyboard 20, ie by pressing the Increase the plus button and vice versa to change the color stripe length.

Of course, the invention is not based on the exemplary embodiment laid down in the description and illustrated in the figures limits that should not limit the scope of the invention. It goes without saying that numerous structural modifications, in particular the use of equivalent mechanical and electronic components, are possible.

Claims (16)

1.Device for influencing the coloring on printing presses using a color density measuring device, a device for target / actual value comparison, at least one electronic computer for linking the measured values with control values, devices for dosing the ink supply to the printing plate, consisting of ink metering elements with associated setting and Feedback devices and displays for the actual position values of the color metering elements,
characterized,
that the color metering elements (14 and 16) associated with guide displays (19 and 37) are provided for the display of manipulated variables of all ink actuators (12 and 15) each of a printing unit, which the operator before the adjustment of the ink actuators (12 and 15) precise recommendations for their guidance Give to specified position setpoints and signal their absolute travel ranges in size and direction, and that with the guide displays (19 and 37) a positioning device (28) that can be selected by the operator for tracking the ink actuators (12 and 15) individually or at least one printing unit is coupled. 2. Device according to claim 1,
characterized,
that the displays of the actual position values of the color metering elements (14 and 16) can optionally be switched over to the guide displays (19 and 37) of the manipulated variables of all color control elements (12 and 15), with one and the same color control elements (either 12 or 15) for each display the same display means (40 and 36) are provided. 3. Device according to claim 1 and / or 2,
characterized,
that the displays of the actual position values of the ink zone metering elements (14) and / or the guide displays (37) of the manipulated variables of all ink zone actuators (12) can optionally be switched to color density trend displays, the same display means (40) being provided for all three displays. 4. Device according to one or more of the preceding claims,
characterized,
that a separate numerical display (36) with its own control keyboard (20) is provided for the guide display (19) for displaying the manipulated variable of the color actuator (15) for adjusting the total amount of color. 5. Device according to one or more of the preceding claims,
characterized,
that the guide displays (19 and 37) are additionally designed to reproduce the actuating movements of the color actuators (12 and 15). 6. Device according to one or more of the preceding claims,
characterized,
that lighting elements (35) are provided for reproducing the positioning movements of the ink zone actuators (12). 7. Device according to one or more of the preceding claims,
characterized,
that in the guide displays (37) the values of the target positions of the ink zone actuators (12) are transformed to a common reference line (41)
and that the actual positions of the ink zone actuators (12) can be represented in the form of a tracking profile (42) by means of the leading lighting elements (35) as position deviations from the values of the target positions of the reference line (41). 8. Device according to one or more of the preceding claims,
characterized,
that the color density measuring device (1 or 2) is equipped with a device for measuring value release (8) for releasing and forwarding both the color density measurement data after its checking and acceptance by the operator and predetermined color density setpoints to the positioning device (28). 9. Device according to one or more of the preceding claims,
characterized,
that the device for release of measured values (8) is coupled to a release switch (17), a first command input by the operator being required after each color density measurement before influencing the coloring, in such a way that at least the release switch (17) must be acknowledged and
that the positioning device (28) is equipped with a tracking control that can be optionally controlled via a selection keyboard (30 and 31) and automatic tracking and that manual remote control (20 and 39) of the ink actuators (12 and 15) of at least one printing unit, which can be activated at any time, is provided, whereby the one-off selection of the automatic tracking system or the repeated selection of the tracking control each additionally require a second command input by the operator. 10. Device according to one or more of the preceding claims,
characterized,
that the positioning device (28) is designed as a tracking control for single tracking of the color actuators (12 and 15). 11. Device according to one or more of the preceding claims,
characterized,
that the positioning device (28) is designed as automatic tracking for continuous, automatic tracking of the color control elements (12 and 15). 12. Device according to one or more of the preceding claims,
characterized,
that one of the tracking control and automatic tracking functionally higher and always active remote control (20 and 39) is provided for manual manual tracking of the color control elements (12 and 15) at any time. 13. Device according to one or more of the preceding claims,
characterized,
that a device (29) for selectively locking and releasing ink zones is provided, by means of the arbitrary ink zone actuators (12) in each case one or more printing units intentionally by the Tracking control or automatic tracking can be excluded and released again for this, whereby manual tracking by means of the remote control is retained. 14. Device according to one or more of the preceding claims,
characterized,
that a decentralized microcomputer system with only equivalent microcomputers (3 and 10) is provided to implement all the process steps required to influence the color control. 15. Device according to one or more of the preceding claims,
characterized,
that a central microcomputer system with at least one hierarchically superordinate central microcomputer is provided to implement all of the procedural steps required to influence the coloring. 16. Device according to one or more of the preceding claims,
characterized,
that the ink density measuring device (1) is provided as a central unit and, for value transmission for the purpose of multi-machine operation, is simultaneously coupled to tracking displays (19 and 37) and positioning devices (28) of several printing machines, each printing machine being assigned separate tracking displays (19 and 37) with associated positioning device (28) .

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