EP1579992A1 - Druckmaschine mit mindestens einem Farbwerk - Google Patents
Druckmaschine mit mindestens einem Farbwerk Download PDFInfo
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- EP1579992A1 EP1579992A1 EP05102102A EP05102102A EP1579992A1 EP 1579992 A1 EP1579992 A1 EP 1579992A1 EP 05102102 A EP05102102 A EP 05102102A EP 05102102 A EP05102102 A EP 05102102A EP 1579992 A1 EP1579992 A1 EP 1579992A1
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- Prior art keywords
- ink
- printing
- printing machine
- image
- zone
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Images
Classifications
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- 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
- 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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
- B65H2557/20—Calculating means; Controlling methods
- B65H2557/264—Calculating means; Controlling methods with key characteristics based on closed loop control
- B65H2557/2644—Calculating means; Controlling methods with key characteristics based on closed loop control characterised by PID control
Definitions
- the invention relates to a printing machine with at least one inking unit according to the Preamble of claim 1.
- the application consists primarily in the evaluation of a quality one of a Printing machine produced printed matter, the printing machine preferably as a rotary printing machine, in particular as one in an offset printing method, in a steel engraving process, in a screen printing process or in a Hot embossing process printing press is formed.
- DE 41 02 122 A1 is suitable for use in the printing industry Method for the examination of sheet-like, translucent material, in particular a paper web, known in the z. B. with LEDs or Laser diodes realized flash lamps shine through a paper web, in which the paper web radiating light for generating a video signal on a CCD matrix a camera falls.
- From DE 43 21 177 A1 is a printing machine with an inline image inspection device for inspection of a machine created in the printing press Print product known, wherein an image data from the printed product to a Computing device providing image capture device is provided, wherein the Image capture device from one measurement module or several each one defined Image area of the printed product scanning measuring modules and at least one associated, the image data in electrical form providing and preferably of the measuring modules spatially separated receiving device, wherein the Measuring modules and the at least one receiving device by means of at least one Image guide are connected to each other, wherein the image capture device from a Precision halogen lamps is associated with existing lighting device, wherein a Blasluftrohr with openings in the direction of the printed product at his Blas Kunststoffbeierschlagung the printed product at a defined distance from Lighting device holds and at the same time with the blowing air, the lighting device cools.
- a lighting device for an optical Inspection device for the investigation of surfaces known, with several preferably the same length, electrically interconnected carrier boards, each with several rows of light emitting diodes linearly in a common, according to the elongated with a constant light emission scanned object surface, stiff Mounting profile are inserted, wherein between the carrier boards and the Mounting profile via a mechanical connection a heat coupling for cooling the Light-emitting diodes and their control electronics takes place.
- DE 203 03 574 U1 is an inline image inspection system for a printing press, in particular a sheet-fed offset printing machine, one known as one Fluorescent lamp formed lighting device below a kick close on a printing material leading impression cylinder and one as a Line scan camera formed image recording device in a compared to Lighting device further distance from the impression cylinder in an assignment is arranged to the last printing unit of the printing press.
- a Print press in particular a sheet-fed offset printing machine
- Fluorescent lamp formed lighting device below a kick close on a printing material leading impression cylinder and one as a Line scan camera formed image recording device in a compared to Lighting device further distance from the impression cylinder in an assignment is arranged to the last printing unit of the printing press.
- EP 0 762 174 A2 discloses a device for linear illumination of Sheet material, such as. As banknotes or securities, known, wherein a cylindrical mirror is provided with two mirror segments, the mirror segments being an elliptical, form two focal lines having footprint, the width of the Mirror segments greater than or equal to the width of the sheet material is selected, wherein in the first focus line that of a transport device perpendicular to this focus line transported sheet material and in the second focus line a cold light source, eg. B. a number of light emitting diodes (LED's) is arranged, wherein a detector, for. B. a CCD array or individually or in groups arranged photodiodes, the remitted from the sheet material light recorded and converted into signals for processing in a processing plant.
- a cold light source eg. B. a number of light emitting diodes (LED's) is arranged, wherein a detector, for. B. a CCD array or individually or in groups arranged photodiodes
- US 5,936,353 is an optical system for generating a lit. Formed on a surface of a material moving relative to the structure, wherein a lighting device with a plurality of light sources generates light for generating the Formed emitted, wherein a detection device with at least one detector of the light reflected on the surface of the material, the light sources on a Board are arranged, wherein the circuit board is arranged on a support, wherein the Carrier has in its interior at least one channel, wherein a liquid or gaseous cooling medium for cooling the light sources flows through the channel. Measures to achieve a constant light intensity arranged on the support Light sources are not described.
- the invention is based on the object, a printing machine with at least one To create inking unit, wherein the inking unit in the longitudinal direction of the ink ductor a adjustable with respect to the ink to be applied to a substrate Has a quantity profile.
- the achievable with the present invention consist in particular that a the Inking controller controlling an adjusted in the longitudinal direction of the ink fountain roller Quantity profile not singular but at least in a multi-zone Area changed, whereby between adjacent zones a printing ink uniform, soft transition is set.
- the printing press has an in-line inspection system with a Lighting device, wherein the light source of the illumination device her Light despite self-heating or external heat influences due to a cooling of their Light source with a high consistency radiates.
- a constant light emission is required to print a piece of paper inspected in their printing process
- the proposed solution has the advantage that the thermal Load the light source is dissipated directly at the source, resulting in short Runtime to achieve a constant light emission can be achieved. Also can be achieved with the proposed measures, a high luminous efficacy.
- the material on the surface thereof illuminated entity is to generate, not in a direct or in the deflected Beam path lying focal point of the light emitted by the light sources must be arranged to the structure in a sufficient illuminance to appear.
- An independent of the focus arrangement of the structure relative to his optical system is advantageous, because then to an exact dimensional accuracy with respect to the distance between the structure and the illumination device can be waived.
- the described optical system is therefore for illuminated material distance tolerant. It is also between components of the optical system caused by contamination, eg. B.
- the described optical system is also for a Image capture of material with a diffuse reflective surface well suited. Even in the case of a material with a relief-like surface, hardly any shadowing effect occurs.
- the lighting device of the in-line inspection system is preferably in modules, d. H. in separate functional units, built, which has the advantage that a Line length of the line-shaped lighting device without expensive custom-made by simply juxtaposing prefabricated, preferably functionally identical Modules in the required number to the width of the material to be illuminated or is adaptable at least to the length of the illumination strip.
- the light sources are activated only in those modules, to illuminate the width of the material to be illuminated or at least the length of the lighting strip are needed, which in the construction and operation of the optical system for its economy is beneficial.
- each Module preferably a plurality of groups of light sources are arranged, wherein the distinguish the light sources assigned to the groups in their optical properties, z. In the color of the light emitted by the light sources of each group, can the individual groups of light sources application-dependent, z. B. after Color of light to be selected and controlled.
- the lighting device of the in-line inspection system has the advantage of being a possibly a long length of z. B. over one meter Lighting strips by a uniform, needs-based light distribution with a homogeneous, sufficiently large illuminance applied and by his modular, low failure prone structure in a simple way to the respective Requirements in a printing machine is customizable. Because the material to be illuminated is not to be placed in a focal point of the lighting device, also eliminates the Need for an exact alignment of the vertical distance of the light sources to the surface of the material as well as a monitoring of this distance during the ongoing use of the optical system, resulting in the handling of the optical Systems suburb in an industrial plant greatly simplified.
- Fluctuation ranges is a color determination and inspection that requires the typical Fluctuations in the quality of the printed matter produced. To call are here permitted color variations, positional shifts of the subject or displacements of objects within a creative. Furthermore, it has to be considered that i. a. certain areas of the template are inspectable while others are not.
- the in-line inspection system described here for assessing a quality of a a printed matter produced has at least one Image pickup unit, in particular a camera, preferably a Color line camera system, on.
- the color line camera system preferably uses a color line camera with up to 2048 pixels per image line.
- the inline inspection system to assess the quality of the produced by the printing press Printed matter is included for inline inspection and inline color control Medium format machines (Perfecting) designed.
- Inline inspection means that one Substrate is inspected during its transport through the press.
- the Inline inspection system ensures that operator-defined quality during the entire production process.
- the inline inspection system to assess the quality of the press produced printed matter consists essentially of three components: at least an image pickup unit, a camera and lighting electronics unit and a Control cabinet with an image processing system.
- the image pickup unit is installed in the printing machine. It has z. Legs Color line camera, a constant light illumination or alternatively one Flash lighting, in particular a triggered line lighting, on, both the constant light illumination as well as the flashlight illumination in each case several next to each other, d. H. have line-shaped, arranged light sources, wherein the Lighting device each z. B. is cooled with water, and a rotary encoder, wherein the encoder z. B. has a resolution of 10,000 strokes.
- Cylinders associated with this printing machine each have an image pickup unit, wherein at least one image recording unit, in particular a camera, in front of a Turning device for a sheet to be printed in the printing press and a another image recording unit, in particular a further camera, after this Turning device are arranged behind the last printing unit of the printing press.
- the Signals of the two image recording units are z. From the same Image processing system processed in a duplex mode and evaluated.
- the camera and lighting electronics unit includes all necessary Function units for power supply of the lighting unit and the Signal conditioning of the camera.
- This unit will be near the image acquisition unit housed in a suitable location. It provides a homogeneous illumination of the safely transported through the printing press. With the help of a light measuring function during the engine run z. B. checked cyclically, if the bulbs flawless, d. H. work in their designated workspace.
- the cabinet with the image processing system includes in particular z. Legs Power supply of the image processing system and an image processing computer preferably including an interface for operation to a control room computer (TCP / IP) as well as the connection possibility of a monitor, z.
- TCP / IP control room computer
- a user interface can temporarily on a second PC, before the operating software for a series product in one the printing machine associated control station is integrated.
- the camera and lighting unit is z. B. in a in Fig. 1 shown Sheet-fed offset printing machine, z. B. a five-color printing machine with a Printing units downstream coating tower and a delivery extension, installed.
- a existing chain guide in the ascending branch of a chain run stabilizes one in the Printing press transported sheets during a learning and inspection process.
- Figure 1 shows a sheetfed offset press alone for the Perfecting.
- the inspection of the printing material is performed by the Inline inspection system to assess the quality of one of the printing press produced printed matter z. B. on in the production process last printing unit in the Production process preferably sequentially several printing units have Printing press or on the printing units downstream paint tower.
- an image recording z. B. with a 3-chip color CCD line scan camera with z. B. 2048 pixels performed. It is ensured that the entire arc during a maximum machine speed of z. B. 18,000 sheets / h can be inspected.
- the printing machine is designed as a web-fed printing press, a material web, for. B. a paper web, even at a maximum machine speed of z. For example, to reliably inspect 15 m / s.
- the resolution is z. B. about 0.25 mm 2 per pixel at a pixel edge length of z. B. about 0.5 mm.
- Lighting device 06 preferably generates a lighting strip 01 a transported from the printing cylinder 39 bow. It is the Lighting device 06 preferably within a part of the printing of the Printing machine surrounding protection 38, z. B. below a foot 38 in the Gallery area of the printing press arranged.
- Remitted from the lighting strip 01 Light is emitted from a camera 08 arranged at a distance from the printing cylinder 39; 201 detected within a certain detection angle ⁇ .
- the camera 08; 201 recorded from the illumination strip 01 remitted light preferably by a preferably narrow gap or slot in the pressure cylinder 38 covering the protection 38th or foot 38, wherein this gap or slot transverse to the transport direction of the Substrate extends.
- the image processing system consists z. B. from a VMEbus rack with z. As a whole six plug-in cards. In addition to a CPU (PowerPC, real-time operating system OS9), one Frame grabber for image acquisition and image data preprocessing as well as a graphics card for Image display and error display are z. B. three image processing cards for learning and the inspection of the sheet present.
- a CPU PowerPC, real-time operating system OS9
- the system is z. B. by means of an Ethernet interface with a control computer, the Operating PC, d. H. z. B. either an external PC or a control desk computer, networked. All the settings required for the inspection and inspection will be displayed on the control PC Color control necessary.
- the operating software is preferably under running on all current Microsoft operating systems.
- the operating computer can be connected to external data networks, so that Repeat orders from a central database and possibly data from the Prepress, e.g. from a CIP3 station.
- a control of the ink zone adjustment in the inking unit of the respective printing units takes place for.
- ARCNet By means of ARCNet.
- the VMEbus CPU is equipped with an ARCNet card.
- the so-called fault monitor connected to the graphics card of the image processing system.
- This shows a live picture of the camera.
- the misprint display is in the Camera image is displayed, so that the operator is immediately able, the fault location and if necessary, localize the cause of the error.
- the fault monitor shows both the substrate short-term printing errors, eg. B. splashes of paint, water spots or paper defects, as well as permanent pressure deviations, z. B. an over- or Undercolouring of single inks or a toning, on.
- a process learning mode is integrated, which is able to to automatically learn the current quality standard during the good production.
- the Programming a model is not necessary.
- References are generated especially for the color model and the intensity model. which are used for comparison for inspection and color determination.
- the Learning mode includes in particular the following functions: learning references, Extend learned or saved references, entering the number of desired ones Learning arc, defining the window of the inspection area, showing the learned or stored reference image, input of the mask for a non-inspected image area, Editing the reference image, editing and copying masks.
- the inline inspection system is capable of permissible changes in the Continuous pressure, which is considered by the inline inspection system as a fault, while running To learn about production.
- the inline inspection system adapts adaptively to the current quality standard and controls or regulates z.
- the human eye is able to detect relatively small color changes.
- human color perception is based on the detection of surfaces designed. Small punctiform color changes are not detected.
- the Color analysis model takes into account this physiological effect. It will be the Color space of the camera spanning colors red, green and blue in a color space transformed, which is referred to as Martinezticianmodell.
- the counter-color model corresponds to an electronic adjustment of human color perception. In this There are two reverse color channels that are extremely sensitive to color changes react. In particular, a tilt of the gray balance of these channels reliably detected.
- the counter-ink model can also be based on the offset printing inks CMYK be implemented, this color model compared to the sensible Color model is aligned to a subtractive color mixing (printing process).
- Intensity deviations d. H. Changes in color density, are over a Gray value analysis detected. This method has particular in areas undone Colors, in a over- and under-coloring as well as small errors, z. B. small Color splashes or paper defects, its strengths.
- the inking unit for dosing the amount of transferred to the substrate Printing ink can in the axial direction of a forme cylinder of a printing unit of the Printing machine several, z. B. have at least between 30 and 60 zones, wherein the dosage of the ink to be transferred to the substrate in different Zones can be set differently.
- the metering device of the inking unit can, for. B. have controllable zone screws, in one printing in multi-color printing Printing machine a total of several hundred individually controllable zone screws can be provided.
- the dosing metered a lot of the on the Substrate to be transferred ink by adjusting their layer thickness and / or their duration of application.
- the metering device can also be used as an at least a paint pump using ink supply system, for.
- a pump paint be formed, with ink brought to a Farbduktor an inking unit is and at the Farbduktor preferably zones by means of individually on the different inking zones acting adjusting agent is metered, wherein the actuating means z. B. a drivable by at least one electrically actuable actuator color dosing, z. B. at least one color meter or a paint slide, have, wherein the Actuator z. B. is designed as a controllable by a control unit servomotor.
- the inking unit can as a multi-roll roller inking or as a Short inking be formed.
- the inking unit can also act as a printing ink atomising, preferably printing ink zonal on a Farbduktor applying Spray inking be formed.
- a color scheme may vary depending on the conditions in the specific case done by two different methods. If colorimeter with sufficient large color fields are present, according to the scheme for color density control with a color measuring strip in FIG. 6, first the nominal densities for the individual Colors entered. The position of the measuring control strip is determined by the operator Monitor marked. After that, the fields of the strip are automatically related to Scales colors analyzed and determines the actual density. Special colors are from Mark the operator in the measuring strip. Based on the deviations from a nominal density and the actual density present, the ink zones on an inking the Printing machine provided. The respective deviations become graphic and numerical displayed. The inline inspection system proposes default values for the Color zone position indicated. These can either be adopted manually or Fully automatically used in closed loop. With the help of Color measurement strips can also be used to determine dot gain with the help of the grid fields become.
- the density determination algorithms in colorimeters can be used for each arc to go through. Also a moving averaging of the measured values over one any number of sheets is possible. Measurement inaccuracies caused by the influence of Fluctuations in pressure due to camera noise, eg. B. a photon noise or a quantization noise of the AD converter, or by an instability of The amount of light emitted by the illumination device is produced on it Way reliably eliminated or at least minimized in their interference.
- camera noise eg. B. a photon noise or a quantization noise of the AD converter
- Calibration of the density measuring system is carried out with measuring sheets, which are regularly Travels are driven through the machine.
- calibrating becomes automatic a color balance, a contrast and a brightness adjusted.
- the standard light be set for the measurement, z. B. as usual D50 or D65.
- a re-calibration is usually not needed more often than once a week in practice.
- the measuring strip has a field width and a field height in each case z. B. from about 5 mm to 6 mm.
- the field size required by a 2 ° standard observer must be in the field of view be safely accommodated.
- the measuring strip consists of several identical ones Segments, with a regular structure within a segment.
- Another method of color control as shown by a diagram in FIG. 7, a color determination and color control based on the printed image before. requirement this is because the area coverage per ink with a resolution of 10 ⁇ dpi ⁇ 40 from a preliminary stage, z. CIP3, and that "significant" pressure ranges per Color zone or ink zone area are present. Significant are pressure ranges then, when one of the inks in this area is dominant. The determination of Significant pressure ranges occur automatically by evaluating data from the Precursor.
- the color determination and the derivation of manipulated variables for the color control takes place on the basis of the print image itself.
- a transformation of the camera image data in carried out the CMYK room.
- the analysis of the printed image is based on a color integration of the significant Pressure ranges within longitudinal strips, in number, preferably the number correspond to the zone screws. These strips are again divided horizontally. Within these resulting surfaces is determined by the color changes and the Zone density set the appropriate zone. By appropriate averaging over several sheets are compensated for permissible process fluctuations.
- a colorimetric error calculated from the measurement is calculated for each Color zone in a control command to control the relevant zone screw implemented.
- a change in the ink supply within the press takes a certain amount of time, before it becomes visible in the print image. This behavior is due to the nature of Color transfer justified in the printing press.
- a controller as an integral controller with a proportional component, short PI controller, intended.
- This controller has the advantage that in addition to a stationary component (I component) for a certain time an error proportional share for one provides additional / reduced ink supply and thus speeds up the control process.
- the additional or reduced ink supply caused by the proportional component is simplified for a certain time, i. H. for a certain number of Cylinder revolutions, approved. After this time, all the color zones will open moved to the stationary state.
- control loop is simplified in that a cyclic method with the steps of measuring, setting and waiting is realized. After completion of the waiting period, d. H. after a certain number of cylinder revolutions, will come with a new one Measurement started a new cycle. So it is despite the closed Control loop around an open principle of action, since the relevant time constant by the time between position of the zones and a reaction on the paper is fixed. There this time z. B. is proportional to some ten sheets, here is an open Realized principle of action. Furthermore, the scheme itself as a position control executed, d. H. the opening of each zone is set and for a certain time held in this position. To achieve the target density as quickly as possible, is admitted that in the case of a paint supply the zones may be for a certain time be overruled.
- the control algorithm integrates all parameters influencing the color scheme. These include in particular the color behavior, d. H. a cover of color that Paper behavior and the ink transfer behavior of the ink fountain. Here are the Color and the paper order-dependent parameters.
- the change in ink supply in a color zone is due to the trituration of the color
- the color transfer within the printing unit also affects their Neighboring zones.
- the neighboring ones Color zones to a certain extent, preferably proportional to the adjusted color zone also adjusted. With correspondingly large adjustments, this adjustment can further impact in the longitudinal direction of the duct intended neighboring zones.
- each Adjustment of a color zone be it automatic or manual, preferably "creates" new setpoints for the neighboring zones.
- each color zone is limited. If a zone is more than "completely open” can be adjusted, additional color only by changing the strip length the ductor of the inking unit can be achieved.
- a change of strip length on the Ductor increases the ink supply in all ink zones. In this case, the ink supply for the color zone concerned either limited or the additional ink supply Changing the strip length must be done at the other color zones by closing all other color zones are compensated. Becomes the lower limit of zone adjustment achieved, namely, when a color zone is closed, no further compensation possible. If the upper limit is reached for a color zone or must it be for the stationary state are exceeded, then in any case, the strip length on to change the ductor, and all other color zones should be adjusted accordingly it reveals the diagram of FIG. 8.
- the controller changes depending on a change in the setting the amount of ink to be applied in a given, selected zone Adjusting the amount of ink to be applied in at least one other, especially in an adjacent zone, creating a longitudinal direction of the ductor adjusted with regard to the ink to be applied to the substrate Quantity profile not singular but at least in a multi-zone Range is changed, whereby between adjacent zones a printing ink uniform, soft transition can be adjusted.
- the preferably digitally working image recording unit comprises z. B. a specially for the sheetfed lighting unit developed and a color CCD line scan camera.
- the Lens is specially adapted to the high-resolution camera, has a removable Filter, e.g. B. a UV filter as a lens protection and can be adjusted user-friendly become. When servicing, the camera and the lens can be easily replaced.
- the image acquisition unit is against mechanical and electromagnetic interference protected.
- the arrangement of the bulbs within the lighting unit is z. B. especially for application in sheetfed printing customized. The bulbs can be easily exchanged.
- the image capture module sets the incoming video image into one digital video stream around.
- This video stream becomes one in the frame grabber Brightness adjustment (shading correction), a perception-oriented Color matching and color space transformation subjected.
- This digital video stream is stored in the memory area of the image acquisition module for later processing.
- the Image acquisition and image analysis is performed in machine real-time.
- the inline inspection system is z. B. equipped with a positioning unit, the in is able to perform an image positioning. By blurring in the Transport movement of the sheet may be necessary, the recorded image for each image in the in-line inspection system. During the The learning process automatically becomes a reference position for the in-line inspection system each sheet determined.
- the in-line inspection system will bow during production with the CCD camera on and forms a computer model with all variants of one acceptable print quality. Starting from a correct color setting will be in the Learning phase Print sheets or printed copies recorded, analyzed and evaluated. Of the Learning mode is able to generate references in machine real time. After this Learning automatically switches the in-line inspection system to colorimetric and Inspection mode to. With the help of the learned references becomes the current production now tested. However, it is possible at all times to set a standard within the Expand reference memory by learning.
- the RGB signal of the video camera is converted into the color separations CMYK.
- Each color separation is in strips, divided according to the color zones. Within each zone, the area fraction of the determined color separation. This value is above the recorded arc averaged. The average value of each area component from the learning phase is used as the setpoint for taken over the control phase.
- each image is analyzed with the models and references compared.
- the sensitivity of the in-line inspection system can be determined by the operator by means of less inspection parameters, such as As the gray scale and color tolerances and Error sizes to be tailored to individual needs.
- the inspection mode includes z. B. the following functions: continuous inspection of the current production order, Input of tolerances for the inspection, defining a grid for the horizontal and vertical division of the inspection image.
- the entry of inspection parameters, which influence the inline inspection system can optionally by a "Password" be secured.
- the "password” can be changed or it can several user-specific "passwords" are assigned.
- During the inspection can z. For example, separate up to 96 single-use through the inspection system grid be statistically recorded. Error benefits are brought about by a grid frame that holds the optical conditions is adapted marked.
- the error analysis processor analyzes the image comparison made by the image processor was generated. It generates a fault image which is included in the live image of the fault monitor is displayed. This allows the operator to enter the image immediately after analyzing the image Intervene machine process.
- a man-machine interface is implemented whose all compounds preferably via optocouplers.
- the interface is z.
- the in-line inspection system is preferably with a hard disk storage equipped, which has enough capacity to include various orders save all tolerances and statistics.
- This order memory is z. B. for approx. 2,000 orders designed. Through a hard disk extension, the number of Orders are increased accordingly.
- the models are used to determine whether a student has to be taught Sheet is largely flawed. If this is the case, the bow will not work co-taught, so not in the current, a quality standard defining Reference picture taken. This adaptive process ensures that no unacceptable sheets are taught in a reference image.
- the image comparison is performed in machine real time z. B. up to a speed of 18,000 sheets per hour performed.
- the Error size can be at least one pixel.
- the machine interface transmits an alarm when one or more consecutively following sheets have been identified with printing errors. Here it is distinguished whether it is a color deviation that leads to a zone screw adjustment, or if it is a geometric error, d. H. a short-term error.
- z. B. at PLC outputs information available, whether a good or There is a bad bow, the in-line inspection system is active or in learning mode located.
- the inline inspection system stops after a mistake and in the other mode, the in-line inspection system only temporarily stops.
- stop-to-error mode the image of the sheet including the error display is frozen as soon as the in-line inspection system detects an error on a sheet.
- the operator can View and evaluate the error message in peace and possibly with associated Verify signature.
- the frozen image must be released by pressing a button become.
- the inspection continues in the background.
- Stop-and-Continue mode the Image automatically frozen after an error detection and after an adjustable Duration of z. B. about 15 seconds automatically released again. The operator receives thus the opportunity to view the picture for a certain time without being forced Manually re-enable the in-line inspection system.
- the inline inspection system is preferably multilingual, z. Tie Languages English, French, Spanish, Italian and German. All languages can be integrated via UNICODE.
- the inline inspection system can measure any sheet size with an edge length of z. B. up to 740 mm ⁇ 1050 mm inspect.
- Tolerance values of the individual processing areas of a reference image can displayed numerically and, if necessary, changed.
- the minimum number of the pixels that are out of tolerance for an error area as an error can occur, can be entered.
- the following section deals with the operating concept of the inline inspection system.
- the in-line inspection system should allow a simple and fast operation, the brings the printer with little training effort a great benefit. He must be warned early on an abovementioned deviation before waste is produced.
- the operation exists as a task on the machine control center, which is located in the superordinate operating concept of the machine inserts. For viewing a current Error image is an additional monitor available. In a perfecting press is the picture switchable.
- the functions beyond the inspection operation such as B. for setting up a job or a creation of masks, z. B. via corresponding entry points in the existing, in the machine control station Implemented operating software of the machine achievable.
- the image is preferably taken while the sheet to be inspected rises a printing cylinder of the printing press is located.
- the image capture is very stable here. ever according to material, eg. B. very thin paper, but it can cause wrinkling or z. B. in a rigid cardboard to a detachment of the sheet end on the Lateral surface of the impression cylinder come.
- the image acquisition is mechanical during installation calibrate so that known mechanical boundary conditions directly into the Pixel dimension of the image capture are implement.
- a data flow to or from the machine control station provides that a job name, a Load number or the passage are taken directly from the machine control station, to be used for the job management of the inline inspection system. From the Sheet dimensions, the higher-level inspection window can be generated. The Manually operated good bow signal on the machine can be used to activate the inspection and also used for statistical evaluation. One from the inline inspection system generated "Gutbogenschreiber" may optionally the Machine control station statistics are supplied.
- a benefit allocation z. B. over a DDDES, CFF or CF2 file are read in order to do the input work before the to be able to do the actual start of the machine run and the workload on the part of the printer.
- Data to be transferred would be z.
- a job name e.g., a job number, a load number, a from the Paper format derived inspection frame or benefit distribution, e.g. from a CF2 file of a punching contour.
- Manual entries which mean an expense for the printer, are on the Entry of the positioning window is limited.
- the inspection window can also automatically set, and then it is not necessary, the printing press already have to start to set up the job. Learning can then - at active good signal - to be started automatically.
- Inspection and control room software share a control panel.
- the Control console software displayed; for a minimum effort when operating the inline inspection system are hard keys or function keys in the control console software screens available, for. B. for the functions switching front / rear, Live / Stop & Go / StopOnError or "Freeze".
- the look-and-feel can also be applied to the Control station software adapted inspection control task can be activated; this stands then the full operability of the inline inspection system available.
- the z. B. displayed in an upper status window shown.
- the live monitor can display error messages in the color area CMYK or spot colors display the corresponding color display.
- Additional controls in the control room software can correct a Net counter by the inspection result, a fault arc statistic or a Provide traffic light indication of the inspection in the machine status field.
- FIG. 10 An example of the TCP / IP stream when sending status data from the operating software QT to the control center software LS shows Figure 9.
- An example of the TCP / IP stream when setting the ink keys shows the Fig. 10. This communication path is running within the printing machine, and from the inline inspection system via the control console software LS, the ARCNet, the PLC to the ink keys.
- Fig. 11 shows an example of the TCP / IP stream at Sending order data from the control room software LS to the operating software QT.
- a material 03 shown in Fig. 12 with a Surface 02 moves in a direction indicated by an arrow movement direction 04.
- the movement is done by a, z. B. arranged in or on the printing press, here not shown transport device, wherein the movement of the material 03 during the operation of the optical inline inspection system described in more detail below preferably takes place in only one direction of movement 04, and preferably linear.
- the material 03 is preferably planar and flat, z. B. as a sheet 03 or as a material web 03, is formed.
- the material 03 is especially as a z. B. made of paper existing substrate 03, z.
- the surface 02 of the material 03 may be a relief or other protruding from the surface 02 or into the Surface 02 as a depression embossed structure, wherein a height or Depth of the relief or the structure compared to a width B03 of the material 03 very is small. At least part of the surface 02 of the material 03 is z. B. by application a reflective material, e.g. As a paint, or a film by introducing a Window thread or other preferably metallic application in the material 03, reflective trained.
- a reflective material e.g. As a paint, or a film by introducing a Window thread or other preferably metallic application in the material 03, reflective trained.
- An illumination device 06 shown only symbolically in FIG. 13 generates the surface 02 of the material 03 an illuminated structure 01 in the form of a Illuminating strip 01 having a length L01 and a width B01 (Fig. 12), wherein the width B01 extends on the surface 02 of the material 03 orthogonal to the length L01.
- the width B01 of the illumination strip 01 is preferably along the Movement direction 04 of the material 03 directed, whereas the length L01 of the Illuminating strip 01 preferably parallel to the width B03 of the material 03, d. H. transverse to the direction of movement 04 of the material 03, is directed and spread over parts of Width B03 of the material 03 or over the entire width B03 can extend.
- the Width B01 of the illumination strip 01 is preferably at least 3 mm, in particular 8 mm.
- the direction of movement 04 of the material 03 is thus preferred at least substantially parallel to the width B01 of the illumination strip 01 directed, wherein the direction of movement 04 of the material 03 within the length of L01 and the width B01 of the illumination strip 01 plane spanned lies.
- the Material 03 is preferably not at least in the region of the illumination strip 01 arched.
- the illumination device 06 has a plurality of line-shaped juxtaposed Light sources 07, so that the entire lighting device 06 line-shaped is trained.
- the line-shaped light sources 07 of the Lighting device 06 are preferably parallel to the length L01 of Illuminating strip 01 arranged.
- the light sources 07 have the surface 02 of the Material 03 each have a distance A07, wherein the distance A07 preferably between 30 mm and 200 mm, in particular between 80 mm and 140 mm.
- the distance A07 of the light sources 07 is preferably perpendicular to the surface 02 of the Material 03. All light sources 07 of the illumination device 06 are preferably similarly formed, z. B. as bright, strong light emitting diodes 07 or as laser diodes 07.
- a central plane of the juxtaposed light sources 07 of the Lighting device 06 emitted light and a central plane of the Lighting strips 01 to the camera 08 of reflected light preferably close one acute angle Y with each other, the z. In the range between 15 ° and 60 °, in particular between 20 ° and 30 ° ( Figure 3).
- the lighting device 06 can also groups of several be provided in a row next to each other arranged light sources 07, wherein the individual groups of light sources 07 in their optical properties, eg. B. in the Distinguish the wavelength of the light emitted by them. So z. B. a group of light sources 07 emit white light, whereas another group of Light sources 07 monochrome light emitted. It can be provided that one with the Lighting device 06 connected control device 23, the groups of Light sources 07 depending on the application, z. B. depending on the nature of Surface 02 of the material 03 according to the color of the light, selected and individually controls. Thus, the controller 23 may also have a group of light sources 07 regardless of at least one other group of light sources 07 in their brightness and / or lighting duration.
- the illumination strip 01 is outside of an im direct or lying in the deflected beam path focal point of the Light sources 07 emitted light arranged.
- the lighting device 06 is z. B. of several lines together tiered modules M61 to M65 (Fig. 23) each preferably with a plurality of line-shaped juxtaposed light sources 07, wherein a parting line 26 between two adjacent modules M61 to M65 preferably obliquely to the length L01 of Illuminating strip 01 is arranged.
- the individual modules M61 to M65 of Lighting device 06 may, for. B. be functionally identical. So z. B.
- FIG. 14 shows in a merely two-dimensional representation a single light source 07 of FIG Lighting device 06.
- the light source 07 emits its light in a solid angle ⁇ , where the solid angle ⁇ is an area AK cut out of a sphere, ie a Sphere surface AK, spans up to the size of a hemisphere.
- Fig. 15 shows several, z. B. four of the light sources 07 shown in FIG. 14 line-shaped arranged side by side on a common board 21. Preferably, it is too the respective light sources 07 belonging power source 22 on the same board 21st arranged.
- the current source 22 is preferably as a constant current source 22, in particular as a controllable constant current source 22, is formed.
- the in-line optical inspection system also includes - as can be seen in FIG. 13 a detection device 08 with at least one at a distance A09 from the Surface 02 of the material 03 arranged detector 09, wherein the detector 09 of the Surface 02 of the material 03 detected remitted light.
- the distance A09 is in Range between 10 mm and 1,500 mm, preferably between 50 mm and 400 mm.
- the detection device 08 is z. B. as a camera 08, preferably a Line camera 08, in particular a color line camera 08, formed. Also the Detection device 08 may be arranged in a row several juxtaposed Have detectors 09, wherein the line-shaped detectors 09 are preferably arranged parallel to the length L01 of the illumination strip 01. Of the Detector 09 of the detection device 08 may, for. As a CCD array 09 or as a Group of photodiodes 09 may be formed. The detector 09 of the detection device 08 converts the detected remitted light into an electrical signal and performs that electrical signal for its evaluation one with the detection device 08th connected image processing device 24 to.
- FIG. 16 shows that in the optical inspection system, the light sources 07 of FIG Lighting device 06 at least a first mirror 11 with at least one longitudinally directed to the length L01 and / or to the width B01 of the illumination strip 01 Active surface 12 is assigned, wherein the active surface 12 of the first mirror 11 in the Solid angle ⁇ emitted light from at least one of the light sources 07 of the Lighting device 06 on a smaller first envelope surface AH1 than that to the Solid angle ⁇ belonging spherical surface AK restricts.
- the active surface 12 of the first Mirror 11 may be flat or concave.
- at least one light source 07 of the illumination device 06 a first mirror eleventh with at least two to one of the light source 07 emitted central beam 13th symmetrical active surfaces 12 on.
- a second Mirror 16 may be provided, wherein the at least one active surface 17 in which the Beam path of the central beam 13 surrounding the central region 14 within the Solid angle ⁇ of the light emitted from the light source 07 is arranged, the Working surface 17 of the second mirror 16 of at least one of the light sources 07 of the Lighting device 06 emitted light against at least one longitudinal to the length L01 and / or to the width B01 of the illumination strip 01 directed active surface 12 of the first Mirror 11 deflects.
- the radiation emitted by the light source 07 radiation preferably bundled more along the length L01 of the illumination strip 01 be considered the radiation along its width B01.
- the active surface 17 of the second Mirror 16 may be flat or concave.
- the central area 14 is to be assigned, emitted by the respective light sources 07 radiation is shown in FIGS to 21 each indicated with continuous arrow lines, whereas from the light sources 07 in their respective solid angle ⁇ peripherally emitted radiation with dashed Arrow lines is indicated.
- the deflection of at least one of the light sources 07 the illumination device 06 in a central beam surrounding the central 13 Region 14 emitted radiation at least one lens 18, in particular a biconvex lens 18, in which the beam path of the central beam thirteenth surrounding central region 14 within the solid angle ⁇ of at least arranged one of the light sources 07 of the illumination device 06 emitted light be between the light source 07 and a center Z18 of the lens 18 a distance A18, wherein the distance A18 is preferably less than half the distance A07 is between the light source 07 and the surface 02 of the material 03.
- the lens 18 may not be rotationally symmetrical to the light from the 07th emitted radiation preferably along the length L01 of the illumination strip 01 to bundle more strongly than along its width B01.
- FIG. 22 shows that the light sources 07 of the illumination device 06 are preferably are arranged such that the respective solid angle ⁇ or at least the Enveloping surfaces AH1; AH2 of at least two adjacent light sources 07 of Lighting device 06 emitted light at least in one Overlay lighting strip 01 illuminating portion 19.
- This overlay is in particular also provided when the participating adjacent light sources 07 are arranged in two adjacent modules M61 to M65.
- Fig. 22 is also it can be seen that at each individual light source 07 of the illumination device 06 respectively a first mirror 11 with at least one active surface 12, preferably with two mutually symmetrical active surfaces 12, at least along the width B01 of the Illuminating strip 01 may be provided.
- the surface 02 of the material 03 a scattering body, d. H.
- a light-scattering body z. B. a lenticular or a prism sheet, wherein the scattering body in the illumination strip 01 on the surface 02 of the material 03 radiated light preferably only or at least predominantly along the length L01 of the illumination strip 01 remitted.
- a further scattering body to another Homogenization of the emitted light from the illumination device 06 at the light Be arranged light exit side of the illumination device 06 and thus in the Light path between the light sources 07 of the illumination device 06 and to illuminating surface 02 of the material 03 are located.
- Such a light sources 07 upstream diffuser improves illumination of the surface 02 of the Material 03 in the sense of a shadow-free illumination when the surface 02 of the material 03 has an at least slight relief.
- Fig. 23 is a view of the optical inspection system in a direction perpendicular to Direction of movement 04 of the material 03 standing plane.
- the lighting device 06 and illuminated on the surface 02 of the material 03 lighting strip 01st are arranged at a distance A07 parallel to each other, but an extension of the Lighting device 06, d. H. their length B06, be greater than the length L01 of the Illuminating strip 01 or as the width B03 of the material 03.
- the Lighting device 06 is divided into preferably a plurality of modules M61 to M65, d. H. in this example, in five line-by-side modules M61 to M65, wherein the light sources 07 arranged in each module M61 to M65 each have light emit to the illumination strip 01.
- the remitted from the lighting strip 01 Light is disposed from the surface 02 of the material 03 at the distance A09 Detector 09 of the detection device 08 within a longitudinal to the length L01 of Illuminating strip 01 opening spatial detection angle ⁇ detected, the Acquisition angle ⁇ in this example is such that it is the from Lighting strip 01 remitted light over the entire length L01 of Illuminating strip 01 detected.
- the detection angle ⁇ forms on the surface 02 of the Material 03 from a cross-sectional area, so that the detection angle ⁇ at least a part of extending across the width B01 of the illumination strip 01 Cross-sectional area of the emitted from the illumination device 06 Detected light beam.
- the cross-sectional area detected by the detection angle ⁇ is preferably at least as large as that on the surface 02 of the material 03 through the Length L01 and width B01 of the illumination strip 01 spanned surface.
- the quality of one with the detection device 08 by detection of the Lighting strip 01 remitted light recorded image is relevant depending on that the light sources 07 of the illumination device 06 light emit constant light intensity. Because fluctuations in the light intensity of the Light sources 07 emitted light lead in the detection device 08 with respect to the the image processing device 24 supplied signal to the same result as Changes in the nature of the surface 02 of the illuminated material 03, so that in the image processing device 24, the causes of a signal change not can be distinguished. Under these circumstances, one can be found in the Image processing device 24 image evaluation made no reliable Statements about the nature of the surface 02 of the illuminated material 03 win.
- the in the Lighting device 06 used light sources 07 are preferably as bright light emitting diodes 07 or laser diodes 07 formed whose light intensity is temperature dependent. The following are to achieve a constant light intensity Measures for temperature stabilization arranged on the carrier 21 Light sources 07 described.
- the advantage of this solution is that the thermal Load of light sources 07 is dissipated directly at the point of origin, resulting in short Runtime can be achieved.
- the light sources 07 are preferably on one with another electronic Components can be fitted and provided with tracks printed circuit board 21.
- the semiconductor of the LEDs 07 or laser diodes 07 is preferably in direct Touch contact with the board 21, the z. B. as MCPCB (metal core printed circuit board) or as a circuit board 21 is formed with a core of aluminum and at its the light-emitting diodes 07 or laser diodes 07 bearing mounting side 32 for training the lowest possible heat transfer resistance only a very thin edition has its heat-conducting surface.
- Fig. 24 shows a circuit board 21 with a plurality of light sources arranged in a row 07, wherein the board 21 in turn on a support 27 made of a thermally conductive Material is arranged, wherein the carrier 27 preferably in its interior preferably below the line-shaped arrangement of the light sources 07, d. H. in as good as possible heat coupling to the light sources 07, at least one channel 28th having a liquid or gaseous cooling medium, for. As water or air, the Channel 28 flows through.
- Preferably frontally on the carrier 27 are for feeding and Leakage of the cooling medium connected to a flow opening 29 and a with a return connected opening 31 is provided, wherein the cooling medium the carrier 27 z. B. flows through in a straight line (Fig. 4).
- Fig. 4 Fig.
- the Cooling medium flows through in two opposite directions, whereby in the Carrier 27 a balanced along the line-shaped arrangement of the light sources 07 Temperature profile is achieved.
- the channel 28 at one end of the carrier 27th be deflected by 180 °.
- a control device not shown, the temperature of the cooling medium on Keep the flow and the flow through the channel 28 constant flow.
- the controller may also measure a difference between the temperature of the Coolant at the flow and the temperature of the coolant at the return constant hold. It is less the absolute temperature of the cooling medium of importance but rather, that a maximum temperature for the light sources 07, the does not result from the heat transfer resistances of the materials involved what is exceeded by the regulatory body by monitoring the Temperature of the cooling medium and a responsive control intervention is prevented. If a variable in its temperature or flow rate Cooling medium for cooling the light sources 07 is not sufficient, the cooling of the Light sources 07 by an external, not connected to the board 21 cooling device (not shown).
- cooling medium for. B. the cooling medium, the at least one in a Chill roller stand arranged cooling roller and / or at least one in an inking unit arranged color tempering and / or at least one in a dampening unit arranged dampening roller flows through.
- a plurality of cooling rollers havingdewalzenschreibr one in commercial printing working web-fed printing press in web running direction behind one of the printing unit downstream dryer, in particular a hot air or infrared dryer, arranged, which in their passage through the dryer z. B. heated to 130 ° C. Material web by their contact with the lateral surface of the cooling rollers preferably on Room temperature is cooled.
- the web wraps around each of the chill rolls each with the largest possible wrap angle.
- Both for a chill roll and for a Farbtemperierwalze is preferably a liquid cooling medium, for. As water, for Commitment.
- the cooling medium preferably flows through the illumination device 06 completely, but at least within the modules M61 to M65 with at least one activated light source 07. With the Flow through the lighting device 06 with a liquid cooling medium leaves For the arranged in the lighting device 06 light sources 07 a Temperature stability of z. B. ⁇ 1 ° C, especially if the cooling medium of a corresponding control device is monitored.
- FIG. 26 An addition to cooling with a flowing cooling medium or an alternative to The use of a flowing cooling medium is shown in FIG. 26.
- the one with the light sources 07 populated board 21 is mounted on a support 27 made of a thermally conductive material arranged, wherein the carrier 27 in turn on at least one Peltier element 33, but preferably a plurality of Peltier elements 33, is arranged, wherein the Peltier elements 33 preferably each with a thermally separated from the carrier 27 Heat sink 34 are connected.
- a necessary temperature measurement to control the at least one Peltier element 33 by an electronic, not shown Control device is preferably directly on the carrier 27 by a at this attached temperature sensor 36 made. In fluctuating Ambient temperature then varies only the temperature of the heat sink 34, but not the temperature of the arranged on the board 21 light sources 07.
- the electronic Control device can in the connected to the illumination device 06 Control device 23 may be integrated.
- the optical inspection system is such to interpret that of the moving material 03 a useful image recording possible is. It should be noted that in a trained as a line camera 08 Detection device 08, the detected amount of the surface 02 of the moving Materials 03 remitted light depending on the speed of moving Material 03 changes. This also changes the brightness of the image recording. at greater speed changes, as in the mentioned machines Usually occur, the image acquisition can become unusable.
- a duty cycle t3 a single light source 07 or a group of light sources 07 of Lighting device 06, which is controlled by one of the control device 23 Current source 22, in particular a constant current source 22, are driven, with a trigger, d. H. an exposure time t1 of the line scan camera 08 to synchronize, so that the surface 02 of the moving material 03 is independent of the Speed of the moving material 03 always with the same amount of light is illuminated. This results in a constant brightness for that of the Line scan 08 captured image over a wide range of speed of the moving material 03.
- a plurality of groups of light sources 07 are provided, each having at least one Current source 22, in particular a constant current source 22, is assigned.
- the Switch-on times t3 of the light sources 07 are determined by the illumination device 06 Connected control device 23 z. B. groupwise or individually individually controlled by the respective current sources 22, so over the length the preferably line-shaped light sources 07 of the illumination device 06 lets you set a light quantity profile.
- the setting of a light quantity profile preferably along the length L01 of the illumination strip 01 has the advantage that Transmission losses through a not shown optics of the line scan 08 can be compensated.
- a z. B. with the controller 23rd connected light sensor 37, the emitted light amount of the light sources 07 of Illumination device 06 measures in order to use the measurement signal of the light sensor 37, the Duty cycle t3 of the current sources 22 with the control device 23 controlled Light sources 07 z. B. adapt to a Degradations the light sources 07 and with the control of the light sources 07 z. B. one with their aging decreasing Compensating radiation in their amount of light. Also, the controller 23 may the duty cycle t3 of the light sources 07 to different optical properties of the Automatically adjust material 03 to be illuminated.
- Fig. 27 shows the timing of the line scan camera 08 and that of the light sources 07.
- the Line scan camera 08 becomes a particular one according to the upper, first time history Time switched on, so that at this time, the exposure time t1 the Line scan camera 08 begins. After expiration of the exposure time t1 immediately follows one of the speed of the moving material 03 dependent timeout t2 between two successive, adjacent image lines of the line scan 08.
- At least one in Dependence on the control of the line camera 08 triggered light source 07 is in accordance with the mean, second time course in FIG. 27 from that of the control device 23 controlled current source 22 simultaneously with the exposure time t1 of the line scan camera 08 driven, wherein after a delay time t4 for the activation of the light source 07, d. H.
- this Light source 07 then remains switched on for the duty cycle t3, where a sum consisting of the delay time t4 and the duty cycle t3 preferably lower is measured as the exposure time t1 of the line camera 08th Die Zeit für die Line scan camera 08 and the light sources 07 repeats periodically in the previous described fixed correlation. Only as a comparison to that in their duty cycle t3 Triggered light source 07 is in the lower, third time course of FIG. 27 Time response of the duty cycle t5 for a constant light source shown.
- the suitable for the print image control Inspection system according to its schematic representation in FIG. 28 an or a plurality of color line cameras 201 coupled to one another or a color area camera 201 having a printed image 203 illuminated by a lighting device 202 receives, with the print image 203 with the printing press on a z. B. made of paper existing printing material has been generated.
- From the color line camera 201 or the Color area camera 201 amplitude values determined from the recording of the print image Axy2 of the individual color channels are billed in an image processing system 204.
- the output of the result is z. B. on one with the image processing system 204 connected monitor 206.
- inputs, z. B. the image processing system 204 for his calculations necessarily to be communicated parameters are over one input the image processing system 204 connected keyboard 207.
- Fig. 29 shows a two-dimensional representation of a resulting from the recording of the printed image, For example, square pixel field, the pixel field in its base z. B. consists of 8x8 pixels and the amplitude values Axy2 of the pixel field on the High axis are applied.
- Data taken or derived from the pixel field only for a one-dimensional Range from a single line to z.
- FIG. 30 shows a preferably generated from several shots reference image with the respective maximum values Aimax2 and minimum values Aimin2 for each pixel i2. Subsequently, the amplitude values Aip2 of the currently recorded print image with this from the course of the respective maximum values Aimax2 and minimum values Aimin2 compared existing reference image and determined the deviations, as the Fig. 31 shows.
- the contrast AK2 becomes the reference image for each deviation rated.
- the evaluation is made via two separately to be set Decision thresholds W2 and F2, where a decision threshold is a Warning threshold W2 and the other decision threshold an error threshold F2 form (Fig. 32).
- a decision threshold is a Warning threshold W2 and the other decision threshold an error threshold F2 form (Fig. 32).
- the display of the deviations takes place on the monitor 206 z. B. separated according to the type of Deviation preferably in different colors, the display on the Monitor 206 preferably superimposed exact position on the current print image is blended. The operator is thus enabled, while the production is running Immediately recognize in which printing unit the cause of a printing press Deviation in the quality of the printed product occurs. The cause can then be evaluated and corrected.
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
- Fig. 1
- ein Schema einer Fünffarbendruckmaschine mit einem Lackturm und einer Auslageverlängerung;
- Fig. 2
- ein Blockschaltbild zur Systemstruktur eines Systems zur Beurteilung einer Qualität einer von der Druckmaschine produzierten Drucksache;
- Fig. 3
- eine Anordnung des Inline-Inspektionssystems in der Druckmaschine;
- Fig. 4
- eine perspektivische Darstellung des Inline-Inspektionssystems in der Druckmaschine;
- Fig. 5
- eine weitere perspektivische Darstellung des Inline-Inspektionssystems in der Druckmaschine;
- Fig. 6
- ein Schema zur Farbdichteregelung mit einem Farbmessstreifen;
- Fig. 7
- ein Schema einer Farbbestimmung und Farbregelung anhand des Druckbildes;
- Fig. 8
- ein Diagramm zum Verstellvorgang an einer Zonenschraube mit einer Verstellung von Nachbarzonen;
- Fig. 9
- ein TCP/IP-Stream beim Senden von Statusdaten von einer Bediensoftware zu einer Leitstandsoftware;
- Fig. 10
- ein TCP/IP-Stream beim Setzen von Farbzonenschrauben;
- Fig. 11
- ein TCP/IP-Stream beim Senden von Auftragsdaten von der Leitstandsoftware zur Bediensoftware;
- Fig. 12
- eine Oberfläche eines bewegten Materials mit einem Beleuchtungsstreifen in einer Draufsicht;
- Fig. 13
- eine schematische Darstellung des Inline-Inspektionssystems;
- Fig. 14
- eine einzelne Lichtquelle der Beleuchtungseinrichtung;
- Fig. 15
- eine zeilenförmige Anordnung von Lichtquellen auf einer gemeinsamen Platine;
- Fig. 16
- eine Strahlenbündelung mit einem ersten Spiegel;
- Fig. 17
- eine Strahlenbündelung mit einem ersten Spiegel längs zur Länge des Beleuchtungsstreifens;
- Fig. 18
- eine Umlenkung des Strahlenbündels aus einem zentralen Bereich der Lichtquelle mit einem zweiten Spiegel;
- Fig. 19
- eine Umlenkung des Strahlenbündels aus einem zentralen Bereich der Lichtquelle mit einem zweiten Spiegel, wobei die Strahlung längs zur Länge des Beleuchtungsstreifens stärker gebündelt ist als längs zu dessen Breite;
- Fig. 20
- eine Bündelung der Strahlung aus einem zentralen Bereich der Lichtquelle mit einer Konvexlinse;
- Fig. 21
- eine Bündelung der Strahlung aus einem zentralen Bereich der Lichtquelle mit einer Konvexlinse, wobei die Strahlung längs zur Länge des Beleuchtungsstreifens stärker gebündelt ist als längs zu dessen Breite;
- Fig. 22
- eine zumindest teilweise Überlagerung der Strahlung von zwei benachbarten Lichtquellen;
- Fig. 23
- eine Seitenansicht des Inline-Inspektionssystems;
- Fig. 24
- eine mit Lichtquellen bestückte Platine auf einem von einem Kühlmedium durchströmten Träger;
- Fig. 25
- einen in zwei entgegengesetzten Richtungen von einem Kühlmedium durchströmten Träger;
- Fig. 26
- einen Träger mit einer Kühlung mit zwei Peltierelementen;
- Fig. 27
- eine Darstellung des Zeitverhaltens der Zeilenkamera und desjenigen der Lichtquellen;
- Fig. 28
- eine weitere schematische Darstellung von Funktionseinheiten des Inline-Inspektionssystems;
- Fig. 29
- eine zweidimensionale Darstellung eines Pixelfeldes;
- Fig. 30
- ein Referenzbild mit Minimal- und Maximalwerte für jedes Pixel;
- Fig. 31
- ein Vergleich des aktuell aufgenommenen Druckbildes mit seinem Referenzbild;
- Fig. 32
- eine Darstellung der Bewertung der Abweichung zum Referenzbild über zwei Entscheidungsschwellen.
- Solldichten
- Position des Messkontrollstreifens
- Druckwerkszuordnung der Farben
- Grauwertempfindlichkeit
- Farbkanalempfindlichkeit
- Fehlergrößen
- 01
- Gebilde, Beleuchtungsstreifen
- 02
- Oberfläche
- 03
- Material, Bogen, Materialbahn, Bedruckstoff, Wertpapier, Banknote
- 04
- Bewegungsrichtung
- 05
- -
- 06
- Beleuchtungseinrichtung
- 07
- Lichtquelle, Leuchtdiode, Laserdiode
- 08
- Erfassungseinrichtung, Bildaufnahmeeinheit, Kamera, Zeilenkamera, Farbzeilenkamera
- 09
- Detektor, CCD-Array, Photodiode
- 10
- -
- 11
- Spiegel, erster
- 12
- Wirkfläche
- 13
- Zentralstrahl
- 14
- zentraler Bereich
- 15
- -
- 16
- Spiegel, zweiter
- 17
- Wirkfläche
- 18
- Linse
- 19
- Teilbereich
- 20
- -
- 21
- Platine
- 22
- Stromquelle, Konstantstromquelle
- 23
- Steuereinrichtung
- 24
- Bildverarbeitungseinrichtung
- 25
- -
- 26
- Trennfuge
- 27
- Träger
- 28
- Kanal
- 29
- Öffnung
- 30
- -
- 31
- Öffnung
- 32
- Montageseite
- 33
- Peltierelement
- 34
- Kühlkörper
- 35
- -
- 36
- Temperatursensor
- 37
- Lichtsensor
- 38
- Schutz, Fußtritt
- 39
- Druckwerkszylinder, Gegendruckzylinder
- 201
- Farbzeilenkamera, Farbflächenkamera
- 202
- Beleuchtungseinrichtung
- 203
- Druckbild
- 204
- Bildverarbeitungssystem
- 205
- -
- 206
- Monitor
- 207
- Tastatur
- A07
- Abstand
- A09
- Abstand
- A18
- Abstand
- B01
- Breite
- B03
- Breite
- B06
- Länge
- L01
- Länge
- Z18
- Zentrum
- AH1
- Hüllfläche, erste
- AH2
- Hüllfläche, zweite
- AK
- Fläche, Kugeloberfläche
- M61
- Modul
- M62
- Modul
- M63
- Modul
- M64
- Modul
- M65
- Modul
- t1
- Belichtungsdauer
- t2
- Auszeit
- t3
- Einschaltdauer
- t4
- Verzögerungszeit
- t5
- Einschaltdauer
- α
- Erfassungswinkel
- Y
- Winkel
- ω
- Raumwinkel
- Axy2
- Amplitudenwert
- Aimax2
- Maximalwert
- Aimin2
- Minimalwert
- Aip2
- Amplitudenwert
- AK2
- Kontrast
- F2
- Fehlerschwelle
- FG2
- Fehlergewicht
- i2
- Pixel
- W2
- Warnschwelle
Claims (15)
- Druckmaschine mit mindestens einem Farbwerk, wobei das Farbwerk Druckfarbe für einen Auftrag auf einer Oberfläche eines in der Druckmaschine transportierten Bedruckstoffes bereitstellt, wobei eine Menge der aufzutragenden Druckfarbe in quer zur Transportrichtung des Bedruckstoffes nebeneinander angeordneten Zonen mit mindestens einem von einer Steuereinrichtung betätigten Stellantrieb einstellbar ist, wobei die Menge der aufzutragenden Druckfarbe in voneinander verschiedenen Zonen unterschiedlich einstellbar ist, dadurch gekennzeichnet, dass die Steuereinrichtung in Abhängigkeit von einer Änderung der Einstellung der Menge der aufzutragenden Druckfarbe in einer Zone die Einstellung der Menge der aufzutragenden Druckfarbe in mindestens einer weiteren Zone ändert.
- Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, dass eine auf den Bedruckstoff gerichtete Bildaufnahmeeinrichtung zumindest von einem mit mindestens einer der Zonen korrelierenden Teilbereich des Bedruckstoffes ein Bild aufnimmt und mit diesem Bild korrelierende Daten an die Steuereinrichtung leitet.
- Druckmaschine nach Anspruch 2, dadurch gekennzeichnet, dass die Steuereinrichtung aus den mit dem Bild korrelierenden Daten einen Istwert für die Menge der in der Zone auf dem Bedruckstoff aufgetragenen Druckfarbe sowie eine Differenz zwischen diesem Istwert und einem Sollwert für die Menge der in der Zone aufzutragenden Druckfarbe ermittelt.
- Druckmaschine nach Anspruch 3, dadurch gekennzeichnet, dass die Steuereinrichtung in Abhängigkeit von der Änderung der Einstellung der Menge der aufzutragenden Druckfarbe in der die Differenz zwischen dem Istwert und dem Sollwert aufweisenden Zone die Einstellung der Menge der aufzutragenden Druckfarbe in mindestens einer weiteren Zone ändert.
- Druckmaschine nach Anspruch 4, dadurch gekennzeichnet, dass die Änderung der Einstellung der Menge der aufzutragenden Druckfarbe in der die Differenz zwischen dem Istwert und dem Sollwert aufweisenden Zone die Differenz zwischen dem Istwert und dem Sollwert verringert.
- Druckmaschine nach Anspruch 4, dadurch gekennzeichnet, dass die weitere Zone zu der die Differenz zwischen dem Istwert und dem Sollwert aufweisenden Zone benachbart angeordnet ist.
- Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinrichtung eine Schichtdicke des Auftrags der in einer der Zonen aufzutragenden Druckfarbe ändert.
- Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinrichtung eine Dauer des Auftrags der Schichtdicke der in einer der Zonen aufzutragenden Druckfarbe ändert.
- Druckmaschine nach Anspruch 4, dadurch gekennzeichnet, dass die Steuereinrichtung die Einstellung der Menge der aufzutragenden Druckfarbe in der weiteren Zone proportional zur Einstellung der Menge der aufzutragenden Druckfarbe in der die Differenz zwischen dem Istwert und dem Sollwert aufweisenden Zone ändert.
- Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinrichtung einen PI-Regler für die Einstellung der Menge der aufzutragenden Druckfarbe in einer der Zonen aufweist.
- Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinrichtung den Sollwert für die Einstellung der Menge der aufzutragenden Druckfarbe in mindestens einer der Zonen aus einer dem Druckprozess vorgelagerten Vorstufe erhält.
- Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Bedruckstoff als ein Bogen ausgebildet ist.
- Druckmaschine nach Anspruch 3, dadurch gekennzeichnet, dass die Steuereinrichtung den Sollwert für die Einstellung der Menge der aufzutragenden Druckfarbe in mindestens einer der Zonen den Daten eines Bildes entnimmt, wobei die Bildaufnahmeeinrichtung das Bild von einem durch die Druckmaschine transportierten Kalibrierungsbogen aufnimmt.
- Druckmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinrichtung eine in einer weiteren Zone geänderte Einstellung der Menge der in dieser weiteren Zone aufzutragenden Druckfarbe als Sollwert für diese weitere Zone nimmt.
- Druckmaschine nach Anspruch 2, dadurch gekennzeichnet, dass die Bildaufnahmeeinrichtung Teil eines in der Druckmaschine angeordneten Inspektionssystems ist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL05102102T PL1579992T3 (pl) | 2004-03-23 | 2005-03-17 | Maszyna drukarska z co najmniej jednym zespołem farbowym |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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DE102004014533 | 2004-03-23 | ||
DE102004014533 | 2004-03-23 | ||
DE102004035787 | 2004-07-23 | ||
DE102004035787 | 2004-07-23 | ||
DE102004049079 | 2004-10-08 | ||
DE102004049079 | 2004-10-08 |
Publications (2)
Publication Number | Publication Date |
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EP1579992A1 true EP1579992A1 (de) | 2005-09-28 |
EP1579992B1 EP1579992B1 (de) | 2012-06-06 |
Family
ID=34864748
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05717090.4A Not-in-force EP1727676B1 (de) | 2004-03-23 | 2005-03-17 | Druckmaschinen mit mindestens einem mit einem stellglied einstellbaren maschinenelement |
EP05102102A Active EP1579992B1 (de) | 2004-03-23 | 2005-03-17 | Druckmaschine mit mindestens einem Farbwerk |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP05717090.4A Not-in-force EP1727676B1 (de) | 2004-03-23 | 2005-03-17 | Druckmaschinen mit mindestens einem mit einem stellglied einstellbaren maschinenelement |
Country Status (6)
Country | Link |
---|---|
US (1) | US7464645B2 (de) |
EP (2) | EP1727676B1 (de) |
CN (1) | CN101090821B (de) |
ES (1) | ES2387567T3 (de) |
PL (1) | PL1579992T3 (de) |
WO (1) | WO2005092613A2 (de) |
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- 2005-03-17 EP EP05717090.4A patent/EP1727676B1/de not_active Not-in-force
- 2005-03-17 PL PL05102102T patent/PL1579992T3/pl unknown
- 2005-03-17 US US10/594,224 patent/US7464645B2/en not_active Expired - Fee Related
- 2005-03-17 ES ES05102102T patent/ES2387567T3/es active Active
- 2005-03-17 WO PCT/EP2005/051234 patent/WO2005092613A2/de active Application Filing
- 2005-03-17 EP EP05102102A patent/EP1579992B1/de active Active
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1813426A2 (de) * | 2006-01-27 | 2007-08-01 | MAN Roland Druckmaschinen AG | Fehlbogensensor einer Druckbogen verarbeitenden Maschine, insbesondere einer Bogendruckmaschine |
EP1813426A3 (de) * | 2006-01-27 | 2011-05-11 | manroland AG | Fehlbogensensor einer Druckbogen verarbeitenden Maschine, insbesondere einer Bogendruckmaschine |
WO2018015193A1 (de) * | 2016-07-19 | 2018-01-25 | Koenig & Bauer Ag | Inspektionssystem mit mehreren erfassungsbereichen |
US10525697B2 (en) | 2016-07-19 | 2020-01-07 | Koenig & Bauer Ag | Inspection system having a plurality of detection zones |
WO2018133251A1 (zh) * | 2017-01-23 | 2018-07-26 | 长胜纺织科技发展(上海)有限公司 | 印花部套装置和印花设备及其自动对版***和方法 |
Also Published As
Publication number | Publication date |
---|---|
CN101090821B (zh) | 2010-11-03 |
EP1727676B1 (de) | 2014-01-22 |
EP1727676A2 (de) | 2006-12-06 |
WO2005092613A3 (de) | 2006-06-01 |
PL1579992T3 (pl) | 2012-10-31 |
CN101090821A (zh) | 2007-12-19 |
US20070144375A1 (en) | 2007-06-28 |
EP1579992B1 (de) | 2012-06-06 |
WO2005092613A2 (de) | 2005-10-06 |
US7464645B2 (en) | 2008-12-16 |
ES2387567T3 (es) | 2012-09-26 |
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