EP0095649B1 - Einrichtung zur Beeinflussung der Farbgebung an Druckmaschinen - Google Patents

Einrichtung zur Beeinflussung der Farbgebung an Druckmaschinen Download PDF

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Publication number
EP0095649B1
EP0095649B1 EP83104827A EP83104827A EP0095649B1 EP 0095649 B1 EP0095649 B1 EP 0095649B1 EP 83104827 A EP83104827 A EP 83104827A EP 83104827 A EP83104827 A EP 83104827A EP 0095649 B1 EP0095649 B1 EP 0095649B1
Authority
EP
European Patent Office
Prior art keywords
ink
control
follow
actuators
displays
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.)
Expired
Application number
EP83104827A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0095649A2 (de
EP0095649A3 (en
Inventor
Willi Jeschke
Anton Rodi
Helmut Dr. Kipphan
Gerhard Löffler
Werner Ewendt
Jürgen Reithofer
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0095649A2 publication Critical patent/EP0095649A2/de
Publication of EP0095649A3 publication Critical patent/EP0095649A3/de
Application granted granted Critical
Publication of EP0095649B1 publication Critical patent/EP0095649B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B41F31/045—Remote control of the duct keys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material
    • B41P2233/51—Marks on printed material for colour quality control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/45—Sensor for ink or dampening fluid thickness or density
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/47—Automatic or remote control of metering blade position

Definitions

  • the invention relates to a device for correcting the coloring of printing presses during the printing process with a color density measuring device, a device for comparing the actual color density values supplied by the color density measuring device with predetermined color density target values, at least one computer for displaying a color density deviation from the target / actual comparison, devices for metering the ink supply to the printing plate, consisting of ink metering elements with associated ink actuators and feedback devices as well as displays for the actual position values of the ink actuators and a positioning device that can be selected by the operator for tracking the ink actuators.
  • DE-AS 2 728 738 describes a device for checking and regulating the coloring of 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 delaying and - since in his judgment subjective - as faulty part of the control loop becomes.
  • the valuable specialist knowledge and the appropriated experience of the printer are 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 an incorrect color density measurement due to failure or contamination of the densitometer z.
  • 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 causes a completely unnecessary time delay in color optimization with waste incurred despite automatic control and adversely affects the color quality of the printed product. Nevertheless, the presence of the operator can still not be dispensed with, since he has to monitor the supposedly automatic regulation of the coloring and react to error or alarm signals.
  • EP-A 70 09 It is also known from EP-A 70 09 to display manipulated variables in a coarse and fine display in a rotary printing press or on a control panel of such a machine.
  • the rough display serves to display the color profile
  • the fine representation of the same color profile is achieved by lighting up further light-emitting diodes and displays the position of the respective actuators with high resolution. Since this display only serves to display manipulated variables, a direct target / actual comparison, i.e. a comparison between the manipulated variables and the specified target variables cannot be carried out.
  • DE-OS 2 727 426 describes a device for controlling the color guidance on rotary printing presses, in which the color density of a printed sheet is measured on a measuring table and a color density deviation is displayed on a so-called tendency display based on target values.
  • the trend indicator is only able to make a qualitative statement about a deviation in the color density, i.e. As the name tendency indicator suggests, only too much or too little color density can be displayed.
  • the positions of the individual zonal actuators for the amount of color to be applied are displayed by means of rows of LEDs. This means that only measured values and position values are displayed optically in this document.
  • a printer From the displayed measured values for the color density on the basis of the tendency display, a printer must carry out corrective interventions in the zonal coloring and change the amount of color individually or as a whole by means of the input keyboard. It is up to the experience or knowledge of the printer how large he must choose the required correction in order to achieve the target color density as quickly as possible. Since the deviations in the color density are displayed in the color density values by means of the trend display, a check as to whether the adjustment or adjustment of the ink zone actuators to the desired extent has been carried out in accordance with the given control command can only be determined again after the next color density measurement of a printing sheet removed from the printing press, which means that minor waste can not be completely ruled out.
  • the invention has for its object to provide a device that intentionally involves the printer in the process of coloring and give him concrete reference values on the absolute travel of the Displays ink zone actuators without having to forego the advantages of automatic coloring, and which on the one hand monitors the color density measured values as a supplement to the automatic density measured value acquisition and on the other hand also immediately checks the specified color position actuators during the adjustment of the color zone actuators, i.e. the entire monitoring of the execution of the control commands not only in a quantitative but also in a qualitative manner.
  • the color metering elements are additionally assigned guide indicators for displaying the absolute travel of all ink actuators of a selected printing unit, both in size and in the direction for adjusting these ink actuators on the basis of the color density deviations to predetermined position setpoints, and that with the guide indicators ,
  • the positioning device which can be selected by the operator, is coupled individually or at least one printing unit for tracking the ink actuators.
  • Such a device guarantees the fastest possible color optimization of the printed product with a minimum of waste, since the manipulated variables have already been converted into absolute travel of the ink actuators and are displayed precisely before they are updated.
  • 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.
  • 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.
  • 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.
  • 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 can be represented 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.
  • 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.
  • 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.
  • a device In order to consciously exclude individual or several ink zone actuators in individual or several printing groups 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 detectable due to a color density measurement that is spatially limited to a print control strip - a device is optional Locking and releasing of ink zones is 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.
  • the printer has the freedom of choice between a tracking control for one-time tracking of the ink zone actuators, an automatic tracking device 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 can combine fully automatic control with a manual control enriched by human experience.
  • 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 operate in the off-line or on-line mode and can be equipped with either one or more densitometers 5.
  • a sheetfed offset press for. B. the use of a color density measuring device according to the one described in DE-OS 2 632 017 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 is controlled by 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 is not shown and described in detail, however, and in the case of machine measurement on the speed of the print medium etc.
  • the microcomputer 3 is equipped with a device for Measured value release 8 equipped, which can be activated by means of a release switch 17 arranged on the control 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 based 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.
  • the microcomputer 10 is subdivided into subunits 21 to 28, an electronic evaluation unit 22 with a data memory 23 being connected downstream of a test electronics unit 21, which in turn are coupled to control electronics unit 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 are preceded by a link electronics 27, which is 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 optical guide displays 37 corresponding to the number of color zones for the optical display of the manipulated variables of all color zone actuators 12, each of which is assigned a lock indicator 38 and a remote control keyboard 39 for the color zone actuators 12, as well as a numerical guide display 19 for numerical representation of the manipulated variables the color actuators 15 for the color ductors 16 with associated control keypad 20.
  • the control desk 11 When checking one 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 can be selectively selected for displaying the previously mentioned measured and control values and for tracking their color control elements (12 and 15).
  • a printing unit selection keyboard 18 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 over to the selected printing unit, i.e. their values related to the printing unit represent.
  • the guide displays 37 consist of vertical rows of light-emitting diodes 40, each row of light-emitting diodes 40 being equipped with sixteen light-emitting diodes 35 in the exemplary embodiment shown in FIG.
  • 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 LEDs 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 setting elements 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 leadership ads 37 z. B. 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 symbol 43.
  • 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 additionally printed out in a log printer (not shown and described in more detail).
  • the operator now has the possibility, as a supplement to the automatic density measurement value acquisition, to compare and critically evaluate the actual measured color density values of the sheet with the specified color density setpoints on the one hand 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.
  • 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 performs a target / actual value comparison between the color density data transmitted to it and calculates the color density deviations.
  • 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 from the values of the color density deviations taking into account the permissible tolerances and the values of the Actual positions of the ink actuators 12 and 15 their desired target positions, stores these values in the data memory 23 and displays 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.
  • the values of the actual positions of the ink metering elements 14 reported back as analog voltages represent a measure of their travel A s or, analogously, a measure of the revolutions of their actuators 12.
  • the distance A s is converted into a corresponding number of light-emitting diodes 35 as a display signal for values of the color density.
  • the color density difference A D determined in the previous setpoint / actual value comparison is also converted into A s and into a corresponding number of light-emitting diodes 35.
  • the target 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 AD.
  • a digital representation of the values in the numerical display 19 takes place for the ink duct 16.
  • the reference line 41 is evenly placed on the middle, in the present exemplary 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 precisely signals the direction and the size of their required travel paths, so that he can accurately measure the ink metering elements 14 and 16 position, and also a control body, by means of which he can also directly monitor the correct execution of the tracking process.
  • the printer can 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.
  • the operator can infer unusual color density measurement values or incorrect density measurement value recording due to unusual deviations in the density gradient.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Dot-Matrix Printers And Others (AREA)
EP83104827A 1982-05-29 1983-05-17 Einrichtung zur Beeinflussung der Farbgebung an Druckmaschinen Expired EP0095649B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823220360 DE3220360A1 (de) 1982-05-29 1982-05-29 Einrichtung zur beeinflussung der farbgebung an druckmaschinen
DE3220360 1982-05-29

Publications (3)

Publication Number Publication Date
EP0095649A2 EP0095649A2 (de) 1983-12-07
EP0095649A3 EP0095649A3 (en) 1985-01-30
EP0095649B1 true EP0095649B1 (de) 1987-08-12

Family

ID=6164858

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Application Number Title Priority Date Filing Date
EP83104827A Expired EP0095649B1 (de) 1982-05-29 1983-05-17 Einrichtung zur Beeinflussung der Farbgebung an Druckmaschinen

Country Status (11)

Country Link
US (1) US5029527A (da)
EP (1) EP0095649B1 (da)
JP (3) JPS58219060A (da)
AT (1) AT391109B (da)
AU (1) AU557283B2 (da)
CA (1) CA1206803A (da)
DE (2) DE3220360A1 (da)
DK (1) DK239783A (da)
ES (1) ES8402770A1 (da)
NO (1) NO159003C (da)
ZA (1) ZA833888B (da)

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US6856424B2 (en) 1990-02-05 2005-02-15 Creo Il. Ltd. Closed loop ceps-press control systems

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DE102004015333B4 (de) * 2004-03-30 2015-09-03 Koenig & Bauer Aktiengesellschaft Einrichtung zur Überwachung verarbeitungstechnischer Vorgänge innerhalb von Druckmaschinen in Aggregatbauweise
DE102004018743A1 (de) * 2004-04-17 2005-11-10 Man Roland Druckmaschinen Ag Vorrichtung zur Visualisierung von Farbdosierelementstellungen an einer Druckmaschine
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DE102004064309B3 (de) 2004-05-03 2022-02-10 Heidelberger Druckmaschinen Ag Inline-Messung und Regelung bei Druckmaschinen
DE102004021601B4 (de) * 2004-05-03 2020-10-22 Heidelberger Druckmaschinen Ag Inline-Messung und Regelung bei Druckmaschinen
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Also Published As

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US5029527A (en) 1991-07-09
EP0095649A2 (de) 1983-12-07
ATA180783A (de) 1990-02-15
JPS60149463A (ja) 1985-08-06
NO159003C (no) 1988-11-23
ES522746A0 (es) 1984-03-01
JPS60143964A (ja) 1985-07-30
DE3372947D1 (en) 1987-09-17
ZA833888B (en) 1984-02-29
DK239783A (da) 1983-11-30
AU1501383A (en) 1983-12-01
EP0095649A3 (en) 1985-01-30
NO831904L (no) 1983-11-30
JPS58219060A (ja) 1983-12-20
CA1206803A (en) 1986-07-02
AT391109B (de) 1990-08-27
DE3220360A1 (de) 1983-12-01
DK239783D0 (da) 1983-05-27
ES8402770A1 (es) 1984-03-01
AU557283B2 (en) 1986-12-18
NO159003B (no) 1988-08-15

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