EP1619026B1 - Machine d'impression avec un dispositif de déclenchement d'un appareil de capture d'image et/ou d'illumination - Google Patents

Machine d'impression avec un dispositif de déclenchement d'un appareil de capture d'image et/ou d'illumination Download PDF

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Publication number
EP1619026B1
EP1619026B1 EP05106742A EP05106742A EP1619026B1 EP 1619026 B1 EP1619026 B1 EP 1619026B1 EP 05106742 A EP05106742 A EP 05106742A EP 05106742 A EP05106742 A EP 05106742A EP 1619026 B1 EP1619026 B1 EP 1619026B1
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EP
European Patent Office
Prior art keywords
printing
printing press
image
press according
printed
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EP05106742A
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German (de)
English (en)
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EP1619026A3 (fr
EP1619026A2 (fr
Inventor
Andreas Birkenfeld
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Koenig and Bauer AG
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Koenig and Bauer AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
    • B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
    • B65H26/025—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs responsive to web breakage
    • 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

Definitions

  • the invention relates to a printing press with an inspection system according to the preamble of claim 1.
  • an image capture unit for. B. has a camera system for receiving an image, and an illumination system for illuminating the surface of the printing material.
  • the US 4,488,808 A relates to a printing machine with an inspection system comprising an image pickup unit and a lighting device, wherein the inspection system inspects a printed material in the printing press, with an arranged on a cylinder of the printing press encoder and a control unit, wherein the rotary encoder and the image pickup unit
  • the control unit in each case provide a signal for evaluating an image taken by the inspected printing material available.
  • WO 2004/028805 A1 discloses drive devices and methods for driving a processing machine, in particular a printing press, wherein in a method for webs a plurality of units mechanically independently driven by drives and signals a Leitachsposition a virtual master in at least one of the drives of these units be led connecting signal line.
  • the drives are each assigned an offset, which defines a permanent, but variable displacement of a desired angular position relative to the Leitachsposition.
  • DE 103 38 973 A1 discloses a method and a device for disturbance detection during transport of a material web in a material web processing machine are known, wherein by means of at least one z. B. designed as a CCD camera sensor unit and a cooperating with this computing unit a Brutransport characterizing size is determined and monitored, the sensor unit specially printed register marks, the printed image itself or at least a portion of the printed image detected and wherein the computing unit z. B. an angular position detected by an encoder of a arranged in a folder cutting cylinder is forwarded to determine a pressure-to-cut register.
  • the invention has for its object to provide a printing machine with an inspection system.
  • a reference to be considered as absolute is defined.
  • the triggering of the image recording unit of the inspection system can be carried out with a high accuracy at times coordinated with the printing process.
  • Fig. 1 shows an example for the control of drives in a printing press, z. B. a web-fed printing press, in particular a working in an offset printing web press, wherein the printing machine z. B. in the newspaper printing and / or printing of commercials is used.
  • the offset printing process may be a conventional wet offset printing process or a dry offset printing process.
  • a plurality of webs of a printing material are guided through the printing machine for its preferably double-sided printing.
  • the printing machine has z. B. several, here three printing towers 01, which in turn each have a plurality of printing units 03, here double printing units 03, wherein each printing tower 01 preferably in its vertical direction of at least one web of the printing material, for. As a paper web, can be traversed, wherein the web of the printing z. B. from a preferably below the respective printing tower 01 arranged roll changer (not shown) is supplied.
  • the printing units 03 of a printing tower 01 together with their respective drive units 08 or control units 08 with their respective associated drive motor M, z. B.
  • a regulated, electric drive motor M preferably a position-controlled or variable-speed drive motor M
  • a computing unit 13, z. B. a parent drive control 13 can also subgroups 02 of printing units 03, z. B. pressure units 02 or other divisions with associated drive units 08 or control units 08 manage.
  • With the signal line 09 are also more, preferably each having its own subordinate drive control 17 units, z. B. one or more vanes 07 and / or one or more folders 06 connected.
  • the signal line 09 is advantageously designed in a ring topology, in particular as a double ring.
  • the drive units 08 or control units 08 are each assigned drive motors M, which in each case have at least one signal line 09 directly or indirectly with each other and with a computing and data processing unit 11, for. B. a computer 11, are connected.
  • the computing and data processing unit 11 may additionally comprise an operating unit or with an operating unit 10, for. B. a control room 10, are in communication.
  • the drive units 08 or control units 08 can in principle (not shown) directly in a ring, bus or other network structure or - as shown - be connected in a tree structure by signal lines 12 to the signal line 09.
  • the at least one signal line 09 carries signals of a Leitachsposition ⁇ , which is predetermined by a higher-level drive controller 13.
  • the signal line 09 together with the arithmetic unit 13, represents a so-called virtual master axis 09, 13 (electronic wave) for the units connected to it, at which the units are oriented with respect to their respective angular position.
  • the Leitachsposition ⁇ is passed to the drive unit 08 or control unit 08 as a default (command variable).
  • the computing and data processing unit 11 supplies specifications for the desired production speed to the higher-level drive controller 13 and is thus connected via the higher-level drive control 13, the signal line 09 (cross-communication) and the signal lines 12 to the drive units 08 or control units 08.
  • Each of the drive units 08 or control units 08 is a value for a specific offset ⁇ i , z. B. an angular offset ⁇ i, predetermined, which fixes a permanent after its setting made, but to adapt z. B. to different productions or production conditions variable displacement relative to the Leitachsposition ⁇ defines.
  • This offset ⁇ i is z. B. directly to the drive unit 08 or control unit 08th and / or via computing and data processing unit 11 can be input and / or stored and retrievable for specific operating situations, in particular specific web guides in a memory in the computing and data processing unit 11.
  • the signal line 09 is designed accordingly, for example as a broadband network, preferably as a broadband bus, then the information about the respective predetermined and fixed offset ⁇ i and the "rotating" Leitachsposition ⁇ optionally via the common signal line 09.
  • the signal line 09 may also be connected in each case with a control system 24 which, for example, the different of the drive motors M actuators and drives of the printing units 02 or printing units 03 or folders 06, z. B. ink supply, positioning movements of rollers and / or cylinders, dampening, positions, etc. controls or regulates.
  • the respective offset ⁇ i is z. B. before the start of production of the control room 10 or from the computing and data processing unit 11 to the drive units 08 and control units 08 transferred and stored there.
  • the offset values ⁇ i for the various drive units 08 or control units 08 can also be stored in the higher-level drive control 13 in a variant.
  • each drive unit 08 or control unit 08 receives via the signal lines 09; 12 (or in series: only 09) as a specification, the sum of the rotating Leitachsposition ⁇ and the specific, stored offset value ⁇ i of the respective drive unit 08 or control unit 08th
  • drive units 08 and control units 08 for example, the drive units 08 and control units 08 of the first two z. B. as printing towers 01 executed units and the drive unit 08 or control unit 08 of the running as a folding unit 06 each unit of the rotating Leitachsposition ⁇ from the parent drive controller 13, each having a fixed offset value ⁇ i relative to the absolute position of the Leitachsposition ⁇ .
  • the signal line 09 is connected to a plurality of, here two, superordinate drive controllers 13, which in each case have mutually different signals of a respective master axis position .phi.a; ⁇ b a leading axis in the signal line 09 can feed.
  • This is advantageous, for example, if the printing machine or its printing towers 01 and / or printing units 02 and / or printing units 03 and the associated folding units 06 and guide elements 07 have a plurality of sections 21, 21; 22 should be assignable.
  • productions and web guides may exceed the section separation indicated in FIG. 1 by a dashed line and from printing units 02 of the one, in printing units 02 of the other and / or the folding apparatus 06 of the other section 21; 22 are performed.
  • the individual printing towers 01 can be assigned, for example, to different folders 06. Even within a printing tower 01 are subgroups, z. As printing units 02, different webs of the printing material with different web guides assignable, which can be performed on a common or even on different folders 06.
  • the sections 21; 22 are logically not to be understood as rigid units.
  • the higher-level drive controllers 13 obtain their specifications regarding the starting point and production speeds of the respective section 21; 22 and / or web guide from a respective associated computing and data processing unit 11, which in turn are in turn connected to at least one control station 10.
  • the two computing and data processing units 11 are connected to one another via a signal line 14 and to a further signal line 23, which connects several, here two, control stations 10 with each other.
  • Offset values ⁇ i relevant for the individual drive units 08 or control units 08 are transmitted to the respective drive units 08 or control units 08 for the relevant production by the computing and data processing unit 11 or the computing and data processing units 11 via the signal line 14 fed and preferably stored there and with the Leitachsposition ⁇ a; ⁇ b processed to the Leitachspositionen ⁇ i .
  • ⁇ i relevant for the individual drive units 08 or control units 08 are transmitted to the respective drive units 08 or control units 08 for the relevant production by the computing and data processing unit 11 or the computing and data processing units 11 via the signal line 14 fed and preferably stored there and with the Leitachsposition ⁇ a; ⁇ b processed to the Leitachspositionen ⁇ i .
  • the subordinate drive control 17 processes each of the associated for the respective drive unit 08 and control unit 08 Leitachsposition ⁇ a; ⁇ b the leading axis, depending on the affiliation of the relevant print image to the one or the other web, with the predetermined for this web guide offset value ⁇ i .
  • control system 24 which is assigned to the respective group 18 or to the unit (eg folder 06) having its own subordinate drive control 17.
  • the control system 24 is connected to the signal line 14 (or to the computing and data processing unit 11) either for example via own signal lines 25 or line sections of the signal lines 25 are part of the executed as a network 14 signal line 14.
  • the control system 24 controls or regulates for example the from the drive motors M different actuators and drives of the printing units 02 and groups of printing groups 18 or printing units 03 or folders 06, z. B. ink supply, positioning movements of at least one roller and / or at least one cylinder, dampening unit, positions, etc.
  • the control system 24 has one or more (in particular programmable logic controller) 26 on. This control unit 26 is connected to the subordinate drive control 17 via a signal line 27. In the case of a plurality of control units 26, these are also interconnected by the signal line 27.
  • the control system 24 and its control unit (s) 26 is / are in an advantageous embodiment by couplers, not shown, for. B. each formed as an interface card network coupler, releasably connected to the signal line 14.
  • the group 18 can in principle be operated alone, the control of the drive units 08 or control units 08 via the train of the subordinate drive control 17 with the signal line 12 and the control of the further functions of the group 18 via the train of the control system 24.
  • Setpoints as well as actual values and deviations can be switched on or off via the coupler.
  • the subordinate drive control 17 assumes in this case the specification of a Leitachsposition ⁇ . For this reason and for reasons of redundancy, it is advantageous if all subordinate drive controllers 17 are designed with the possibility of generating and specifying a Leitachsposition ⁇ .
  • the offset values ⁇ i are thus supplied in the embodiment of FIG. 1 from the signal line 14 via the respective control system 24 of the relevant subordinate drive control 17.
  • the offset values ⁇ i can alternatively be passed from there to the drive units 08 or control units 08, where they are stored and processed.
  • the higher-level drive control 13 can be omitted if z. B. one or more groups 18 or one of its own subordinate drive control 17 having units (eg folder 06) has a subordinate drive control 17.
  • the virtual master axis or Leitachsposition ⁇ is then z. B. of one of the drive controls 17 can be specified.
  • a corresponding control value via the signal line 27 is guided to the controller 17 and in the determination of the specific target angular position for the individual drive unit 08 or control unit 08 from the Leitachsposition ⁇ ; .phi.a; ⁇ b and offset ⁇ i formed superimposed setpoint.
  • This procedure avoids an increased data flow via the signal line 09 leading the leading axis.
  • not many different data packets which have already been adapted to the respective drive units 08 or control units 08 must be routed through this signal line 09. With reference to the individual drive unit 08 or control unit 08, this would result in a significantly reduced possible signal rate.
  • the subordinate drive controllers 17 only manage a very limited number of drive units 08 or control units 08, so that the data in the signal lines 12 can be handled accordingly. However, this is not comparable to the number of all, one entire section 21; 22 associated drive units 08 or control units 08.
  • Each of these drive units 08 and control units 08 is a specific offset value ⁇ i can be assigned, which in each case relative to the master axis position ⁇ set position; .phi.a; ⁇ b expresses the assigned leading axis.
  • ⁇ i can be assigned, which in each case relative to the master axis position ⁇ set position; .phi.a; ⁇ b expresses the assigned leading axis.
  • Control units 08 of the printing towers 01 or printing units 02 or printing units 03
  • the associated drive unit 08 or control unit 08 of the folder 06 and optionally guide elements 07 each associated with specific offset values ⁇ i with respect to the relevant for the production of the leading axis.
  • offset values ⁇ i are based essentially on purely geometric conditions. On the one hand, they depend on the selected web guide, ie on the web path between the individual units. On the other hand, they can depend on a random or selected zero position of the individual drive unit 08 or control unit 08. The latter is omitted for the individual drive unit 08 or control unit 08, when their defined zero position coincides with the zero position of the master axis.
  • an inline inspection system 31 which is arranged on or preferably within the printing press and assesses the quality of the printed matter produced by the printing machine in a running printing process in real time.
  • An in-line inspection system 31 can within the printing press in at least one of the printing towers 01, preferably in each printing tower 01, in the transport direction T of the printing material 39 z. B. at or behind the last printing location 47 of the respective printing tower 01 and / or before the entry in at least one of the printing towers 01 printed web of the printing material 39 in one of the folders 06 or in a dryer (not shown), z. B. a hot air or infrared dryer can be arranged.
  • a web-fed printing press is shown by way of example in FIG. 1, the printing press may alternatively also be designed as a sheet-fed printing press with drive units 08 or control units 08 guided in a corresponding manner by a lead axis position.
  • FIG. 2 A suitable for use within the printing machine inspection system 31, z.
  • an inline inspection system 31 is shown in FIG. 2 in the form of a schematic diagram.
  • Such an inspection system 31 includes at least one illumination device 36 with at least one, preferably a plurality of light sources 37; 38, wherein the illumination device 36 light in the direction of the printing material 39, which has at least one printed image to be tested emitted. Furthermore, at least one detection device 32, for example, belongs to this inspection system 31. B. an image pickup unit 32, each with at least one detector, wherein the detector detected by the surface of the printing material 39 remitted light. The illumination device 36 and the detection device 32 are connected to a control unit 34.
  • the printing material 39 in particular a material web 39, preferably a paper web 39, is preferably moved uniformly relative to the inspection system 31 through a detection region 41 of a camera 33 of the image recording unit 32 that lies in a transport plane of the printing substrate 39 and extends in the transport direction T, wherein the Transport speed of the substrate 39 z. B. 12 m / s to 15 m / s or even higher speed.
  • the printing material 39 has at least on its side facing the inspection system 31 side at least one printed image or print motif. From the light sources 37; 38 of the illumination device 36 emitted and in the detection area 41 of the camera 33 of the image pickup unit 32 incident light (in Fig. 2 by a respective central beam 42, 43 only hinted) is remitted from the surface of the printing material 39.
  • the at least one camera 33 of the image acquisition unit 32 is z. B. as a color camera 33, preferably as a detector as at least one CCD chip having semiconductor camera 33, in particular as a line camera 33, wherein the photosensitive detector of the line scan 33 is arranged transversely to the transport direction T of the printing substrate 39, so that the surface of the relative to Inspection system 31 moving substrate 39 is scanned in line with its transport speed progressively line by line.
  • the complete image acquisition of a print motif on the printing substrate 39 usually requires the detection of a multiplicity of sequentially recorded image lines when using a line camera 33, wherein each image line captures a section of the print motif.
  • the light sources 37; 38 of the illumination device 36 may be formed in a line across the transport direction T of the printing substrate 39 and preferably extend over the entire width of the printing material 39.
  • the light sources 37; 38 of the illumination device 36 then each form a so-called line illumination with regard to the printing material 39.
  • the light sources 37; 38 of the illumination device 36 are in the transport direction T of the substrate 39 z. B. offset from one another at a distance A, so that light emitted by them under different incidence angles ⁇ ; ⁇ is incident on the detection area 41 of the camera 33 of the image pickup unit 32, each of the incident angles ⁇ ; each from one of one of the light sources 37; 38 outgoing central beam 42; 43 is measured to a standing in the detection area 41 perpendicular to the substrate 39 incidence solder 44. Because of the light sources 37; 38 emitted light at different angles of incidence ⁇ ; ⁇ is incident on the detection area 41 of the camera 33 of the image pickup unit 32, with each of these light sources 37; 38 other, ie in the reflection behavior respectively distinctive surfaces of the printing material 39 are highlighted.
  • At least one of the light sources 37; 38 at such an angle of incidence ⁇ ; ⁇ arranged that of this light source 37; 38 emitted light from the detection area 41 according to the condition "angle of incidence is the same angle of reflection" to the camera 33 is remitted.
  • the camera 33 of the image recording unit 32 is directed onto the surface of the printing substrate 39 at an observation angle ⁇ , wherein the observation angle ⁇ between one of the detection area 41 and the camera 33 directed central beam 46 and the perpendicular to the substrate 39 standing incident slot 44 is dimensioned.
  • the angles of incidence ⁇ ; ⁇ and the observation angle ⁇ are each preferably acute-angled, ie formed smaller than 90 °.
  • the inspection system 31 preferably operates in an incident light method.
  • the in the transport direction T of the printing substrate 39 at a distance A from each other spaced light sources 37; 38 of the illumination device 36 preferably have the same light color or let fall into the detection area 41 light of the same light color.
  • the light sources 37; 38 of the illumination device 36 are preferably designed as high-intensity light-emitting diodes (LED) or laser diodes, which bundle their light in each case and deliver targeted in a directed to the detection area 41 preferred direction.
  • Optical devices (not shown), such as lens and / or mirror assemblies, can control the directional homogeneity of the light sources 37; Support 38 emitted light, these optical devices are preferably integrated to achieve a compact overall structure in the illumination device 36.
  • the image recording unit 32 and the illumination device 36 are in the inspection system 31 in a fixed arrangement to each other, with their arrangement remains unchanged at least during an inspection of the printing material 39.
  • both the image recording unit 32 and the illumination device 36 are permanently installed in the printing press.
  • the image pickup unit 32 is arranged at a distance A32 and the illumination device 36 is arranged at a distance A36 respectively from the surface of the printing material 39.
  • the distance A32 of the image pickup unit 32 is in the range between 10 mm and 1,500 mm, preferably between 50 mm and 400 mm.
  • the distance A36 of the illumination device 36 is preferably between 30 mm and 200 mm, in particular between 80 mm and 140 mm.
  • the distances A32 and A36 are preferably fixed and should not be changed, at least during the inspection in an ongoing production of the printing press.
  • the image recording unit 32 and the illumination device 36 have an angle ⁇ which is likewise preferably fixedly set to one another, wherein this angle ⁇ is preferably formed at an acute angle or approximately at right angles.
  • the control unit 34 controls in the transport direction T of the printing material 39 at a distance A from each other staggered light sources 37; 38 of the illumination device 36 preferably separated from each other, d. H. individually and independently.
  • the control unit 34 provides z. B. a switch-on of the light sources 37; 38, their duty cycle and their respective brightness.
  • a contrast between reflective and diffuse reflective features of the surface of the printing substrate 39 can be adjusted specifically, whereby an adaptation to the respective current to be processed in the printing press job can be done.
  • ⁇ ; ⁇ arranged light source 37; 38 of the illumination device 36 can also be the contrast between a reflective only under a special angular condition feature of the surface of the printing substrate 39 and the environment of this feature, because depending on the reflectivity of the feature, it occurs either by relatively flat incident grazing light or under a Einfallslot 44 near angles are more prominent in its visibility.
  • the control unit 34 may determine the turn-on time of certain selected light sources 37; 38 z. B. depending on the transport speed of the printing material 39 or an angular position of a participating in the transport and / or printing of the printing substrate 39 cylinder, in particular a printing cylinder, control, in each case z. B. the detection area 41 of the camera 33 of the image pickup unit 32 forms a reference point, ie, the light sources 37; 38 are always from the control unit 34 z. B. at a certain correlated with the detection range 41 of the camera 33 angular position of the participating in the transport and / or printing of the substrate 39 cylinder or depending on the transport speed of the printing material 39 according to set, traveled by the substrate 39 routes.
  • control unit 34 can in turn, for. B. be dependent on the currently processed in the printing machine print job. This option is advantageous in a print motif or a special feature of the surface of the printing material 39 applicable, which in each case in a rigid sequence, for. B. at a fixed distance, recurring, z. B. after every complete or half revolution of the substrate 39 transporting and / or printing cylinder.
  • the light sources 37; 38 are preferably switched off again by the control unit 34 after the print motif to be detected or the special feature of the surface of the printing substrate 39 has passed through the detection area 41 of the camera 33 of the image recording unit 32 in its entirety, ie after the print motif or special feature of the surface to be detected of the printing material 39 has been completely detected by the camera 33 of the image recording unit 32.
  • the illumination device 36 can be adapted to the respective reflection behavior of the print motif to be detected and / or to be detected special feature of the surface of the printing material 39 in an advantageous manner.
  • the respective switch-on time and the respective switch-on duration of at least one particular selected light source 37; 38 are selectively set with respect to a particular print motif to be detected or feature of the surface of the substrate 39, this to be detected print motif or to be detected special feature of the surface of the substrate 39 together with other print motifs or other special features of the surface of the printing material 39 in the same Passage of the printing material 39 through the detection area 41 of the Camera 33 of the image pickup unit 32 is to be detected.
  • the special feature of the surface of the printing material 39 may also be provided to form a special aesthetic appearance of this printed product.
  • a special color, z As the aforementioned OVI color, a paint or a film may be applied.
  • the control unit 34 controls the light sources 37; 38 of the illumination device 36 switches between two successive image lines taken by the line scan camera 33.
  • the switching times of the light sources 37; 38 of the illumination device 36 are significantly below the line clock of the line scan 33. If z. B.
  • the line scan camera 33 must have a line cycle which allows a picture line corresponding to the extent of the detection area 41 to be drawn twice read, in each case once, after the substrate 39 has traveled in its transport direction T as a function of its transport speed the distance that corresponds to half the extent of the detection area 41 in the transport direction T of the printing substrate 39. If more than two partial images are to be recorded under different illumination situations, while the printing material 39 passes through the detection region 41, a plurality of light sources 37 are also corresponding to the number of partial images to be recorded.
  • control unit 34 of the inspection system 31 controls both its image pickup unit 32 and its illumination device 36 by switching operations in order to activate or deactivate the image pickup unit 32 or the illumination device 36 as needed, wherein what is required, for. B. by geometry data of the printed product, eg. B. its length in the transport direction of the printing material 39, by the printed image of the printed product as such, z. B. whose shape and relative arrangement on the surface of the printing substrate 39, and / or determined by the reflection behavior of the surface of the printing material 39 and its special features.
  • the switching operations can be triggered by a corresponding hardware circuit or software programming.
  • the image recording unit 32 and the illumination device 36 are thus triggered, wherein triggering the triggering of an event, in particular a switching operation to be understood under a specified condition, the triggering z. B. according to positive logic then takes place when the condition is met.
  • the image recording unit 32 and / or the illumination device 36 it is advantageous to trigger the image recording unit 32 and / or the illumination device 36 from the Leitachsposition ⁇ ; .phi.a; .phi.b; Depending on the Leitachsposition ⁇ ; .phi.a; .phi.b; ⁇ i, either directly from the Leitachsposition ⁇ ; .phi.a; .phi.b; ⁇ i or from the z. B.
  • the term of dependence here means that a clearly defined functional relationship between the triggering of the image pickup unit 32 and / or the illumination device 36 and the Leitachsposition ⁇ ; .phi.a; .phi.b; ⁇ i or the current offset ⁇ i .
  • the control unit 34 communicates z. B.
  • control unit 34 of the inspection system 31 is connected to at least one of the Leitachsposition ⁇ ; .phi.a; .phi.b; ⁇ i and / or the signal lines 09 leading to the respective drive units 08 or control units 08 ⁇ i ; 14; 23 with the arithmetic unit 13 and / or the computing and data processing unit 11 and / or the operating unit 10, which z. B. is designed as a control station 10 connected.
  • the dependence of the triggering of the image acquisition unit 32 and / or the illumination device 36 on the master axis position ⁇ ; .phi.a; .phi.b; ⁇ i and / or the applicable for the respective drive units 08 or control units 08 offset ⁇ i can be prepared that the triggering of the image pickup unit 32 and / or the illumination device 36 at a certain angular position z.
  • At least one of the printing cylinder, z. B. one of the forme cylinder and / or another of the printing cylinder, z. B. one of the transfer cylinders or an interacting with this impression cylinder preferably has a position-controlled electric drive motor M, wherein the drive unit 08 or control unit 08 provides a signal corresponding to its angular position.
  • the at least one roller z. B. is formed as a cutting roller in a folder 06, may be driven by a position-controlled or a variable speed electric drive motor M directly or via a transmission.
  • a predetermined tolerance limit exceeding positional deviation between the reference position and the position of the currently recorded image can very reliably to a disturbance in the transport of the material web 39, z.
  • a web break closed, because the printed material web 39 in the event of a crack or break immediately and mostly abruptly loses its tension.
  • the position of the printed printed image shifts relative to the printing area 47, z. B. by resilient recoil due to the web tension loss or lack of promotion of the web 39 by the dryer downstream cooling rollers (not shown) in heatset printing inks processing printing machines.
  • the specified for web break detection tolerance limit in the positional deviation between the reference position and the position of the currently recorded image can, for. B.
  • one of the control units 08 belonging to the printing press activates; 10; 11; 13; 17; 26; Preferably, a web catcher (not shown) or a web capper (not shown) and / or even bring the press to a standstill.
  • Web presses are subject in principle to the risk of cracking or breakage of the printed material web 39 and the resulting machine damage.
  • suitable facilities eg. B. blunting knife and / or safety gear, a broken web 39 can be treated in the printing press so that a resulting damage is limited.
  • These devices are controlled by sensors, whose task is the early detection of the web break. Are known z. As photocells, web edge sensors or web tension sensors. Depending on the mode of action, the reaction rate of these sensors and thus the time of use of the protective device controlled by the output signal of the sensors is different and often too slow.
  • a web break in the dryer is particularly critical because the web 39 after a web break in the last printing unit 03 of the printing press, d. H. the arranged before the dryer printing unit 03, is wound.
  • the web length is drawn out of the dryer and wound with it.
  • the safety gears used here are particularly dependent on rapid and reliable reporting of the web break sensor, wherein the web break sensor comprises at least one sensor which detects the web break and the associated signal evaluation and provision of a control signal for a device reacting to the web break.
  • the image recording gives the state of the material web 39 and thus a print image printed on it at the time of taken as a triggering reference angular position of the printing cylinder very reliable again.
  • a distance A41 between the location of the image taken with the inspection system 31 and the pressure point 47 of the printing cylinder in one of the printing units 03 of the printing press is preferably in the range z. B. of less than 1,500 mm, preferably less than 500 mm, this distance A41 corresponds to a distance traveled by the substrate 39 in its transport plane in the transport direction T and thus both a linear course and z. B. along the lateral surface of a cylinder or a roller a curved course, in particular can take a curved course.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Projection-Type Copiers In General (AREA)

Claims (20)

  1. Machine à imprimer avec un système d'inspection (31), comprenant une unité d'enregistrement d'images (32) et un dispositif d'illumination (36), le système d'inspection (31) inspectant un matériau d'impression (39) ayant été imprimé dans la machine à imprimer, avec une unité de commande (34), l'unité de commande (34) déclenchant l'unité d'enregistrement d'images (32) et/ou le dispositif d'illumination (36), caractérisée en ce que, dans la machine à imprimer, est prévu un axe directeur (09 ; 13) virtuel réalisé sous forme d'arbre électronique, l'unité de commande (34) déclenchant l'enregistrement d'image (32) et/ou le dispositif d'illumination (36), chaque fois en fonction d'une position d'axe directeur (θ ; θa ; θb) de l'axe directeur (09 ; 13) virtuel.
  2. Machine à imprimer selon la revendication 1, caractérisée en ce que l'unité de commande (34) déclenche l'unité d'enregistrement d'images (32) et/ou le dispositif d'illumination (36), directement en fonction de l'axe directeur (Φ ; Φa ; Φb) de l'axe directeur (09 ; 13) virtuel.
  3. Machine à imprimer selon la revendication 1, caractérisée en ce que l'unité de commande (34) déclenche l'enregistrement d'image (32) et/ou le dispositif d'illumination (36) en fonction de l'offset ΔΦi se référant à la position d'axe directeur (Φ; Φa; Φb), fixant une valeur pour un déplacement par rapport à la position d'axe directeur (Φ; Φa; Φb).
  4. Machine à imprimer selon l'une des revendications précédentes, caractérisée en ce qu'au moins un cylindre et/ou au moins un rouleau de la machine à imprimer sont entraînés en fonction de la position d'axe directeur (Φ; Φa; Φb) et/ou de l'offset ΔΦi, se référant à la position d'axe directeur (Φ; Φa; Φb).
  5. Machine à imprimer selon la revendication 4, caractérisé en ce que l'unité de commande (34) déclenche l'unité d'enregistrement d'images (32) et/ou le dispositif d'illumination (36) en fonction de la position d'axe directeur (Φ ; Φa; Φb) valant pour le cylindre respectif ou pour le rouleau respectif.
  6. Machine à imprimer selon la revendication 4, caractérisée en ce que l'unité de commande (34) déclenche l'unité d'enregistrement d'images (32) et/ou le dispositif d'illumination (36) en fonction de l'offset (ΔΦi) valant pour le cylindre respectif ou pour le rouleau respectif.
  7. Machine à imprimer selon la revendication 4, caractérisée en ce que le cylindre est un cylindre de groupe d'impression, dans un groupe d'impression (03) de la machine à imprimer.
  8. Machine à imprimer selon la revendication 4, caractérisée en ce que le rouleau est un rouleau de découpage dans un appareil de pliage (06) de la machine à imprimer.
  9. Machine à imprimer selon la revendication 4, caractérisée en ce que le cylindre et/ou le rouleau présente(nt) chacun un moteur d'entraînement M, à régulation de position, ou à régulation de la vitesse de rotation.
  10. Machine à imprimer selon la revendication 4, caractérisée en ce que la valeur de l'offset Δθi, valant pour le cylindre respectif ou pour le rouleau respectif, est modifiable.
  11. Machine à imprimer selon la revendication 1, caractérisée en ce que l'unité d'enregistrement d'images (32) est réalisée en tant que caméra à lignes (33), comprenant au moins une ligne d'image, orientée transversalement par rapport à la ligne de transport (T) du matériau à imprimer (39).
  12. Machine à imprimer selon la revendication 1, caractérisée en ce que le dispositif d'illumination (36) est réalisé sous la forme d'au moins un dispositif d'illumination linéaire, orienté transversalement par rapport à la direction de transport (T) du matériau à imprimer (39).
  13. Machine à imprimer selon la revendication 1, caractérisée en ce que le système d'inspection (31) inspecte le matériau à imprimer (39) dans un processus d'impression en cours.
  14. Machine à imprimer selon la revendication 1, caractérisée en ce que le système d'inspection (31) apprécie une qualité d'un axe d'impression produit par la machine à imprimer.
  15. Machine à imprimer selon la revendication 1, caractérisée en ce que le système d'inspection (31) inspecte un matériau à imprimer (39) réalisé sous la forme de bande de matériau (39).
  16. Machine à imprimer selon la revendication 1, caractérisée en ce qu'un espacement (A41), entre un emplacement situé à l'intérieur d'une zone de détection (41) de l'unité d'enregistrement d'images (32), auquel l'unité d'enregistrement d'images (32) enregistre une image d'une image d'impression sur la surface du produit à imprimer (39), et un point d'impression (47), imprimant le matériau à imprimer (39) avec un cylindre du groupe d'impression pris en référence pour le déclenchement, est dans une fourchette inférieure à 1.500 mm.
  17. Machine à imprimer selon la revendication 1, caractérisée en ce que l'espacement (A41), entre un emplacement situé à l'intérieur de la zone de détection (41) de l'unité d'enregistrement d'images (32), auquel l'unité d'enregistrement (32) prend une image d'une image d'impression située sur la surface du matériau à imprimer (39), et le point d'impression (47), imprimant le matériau à imprimer (39) avec le cylindre de groupe d'impression pris comme référence pour le déclenchement, est situé dans une fourchette inférieure à 500 mm.
  18. Machine à imprimer selon la revendication 1, caractérisée en ce que l'unité de commande (34) du système d'impression (31) vérifie une position d'une image enregistrée actuellement par rapport au moment de déclenchement, sur un écart de position envers une position d'une image mémorisée pour ce moment de déclenchement.
  19. Machine à imprimer selon la revendication 18, caractérisée en ce que l'unité de commande (34), lors du contrôle de l'écart de position concernant la position de l'image actuellement enregistrée par rapport à la position de référence, évalue un dépassement d'une limite de tolérance, fixée préalablement, comme étant une perturbation dans le transport de la bande de matériau (39).
  20. Machine à imprimer selon la revendication 1, caractérisée en ce que l'unité de commande (34) du système d'inspection (31), par une comparaison, entre la position d'une image enregistrée actuellement au moment du déclencheur et la position d'une image mémorisée pour ce moment du déclencheur, vérifie le matériau à imprimer (39), du point de vue d'un éventuel déchirement dans la bande.
EP05106742A 2004-07-23 2005-07-22 Machine d'impression avec un dispositif de déclenchement d'un appareil de capture d'image et/ou d'illumination Expired - Lifetime EP1619026B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004035785 2004-07-23
DE102004052181A DE102004052181B3 (de) 2004-07-23 2004-10-27 Verfahren zur Erkennung eines Bahnrisses einer in einer Rollendruckmaschine bedruckten Materialbahn

Publications (3)

Publication Number Publication Date
EP1619026A2 EP1619026A2 (fr) 2006-01-25
EP1619026A3 EP1619026A3 (fr) 2006-03-15
EP1619026B1 true EP1619026B1 (fr) 2007-05-02

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EP05106742A Expired - Lifetime EP1619026B1 (fr) 2004-07-23 2005-07-22 Machine d'impression avec un dispositif de déclenchement d'un appareil de capture d'image et/ou d'illumination

Country Status (3)

Country Link
EP (1) EP1619026B1 (fr)
AT (1) ATE361198T1 (fr)
DE (2) DE102004052181B3 (fr)

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DE102006029882B4 (de) * 2006-06-28 2016-06-02 Koenig & Bauer Ag Verfahren zum Betreiben der Beleuchtungseinrichtung eines photoelektrischen Empfängers
EP1980396A3 (fr) * 2007-04-10 2011-08-24 Robert Bosch Gmbh Procédé destiné déplacer des modules de machines d'impression
DE102008021447A1 (de) * 2008-04-29 2009-11-05 Manroland Ag Verfahren zum Betreiben einer in eine Rollendruckmaschine integrierten Bearbeitungseinrichtung
DE102008059584B4 (de) 2008-11-28 2021-11-18 BST eltromat International GmbH Verfahren und Vorrichtung zur Regelung des Registers in einer Druckmaschine
DE202013101851U1 (de) 2013-04-29 2014-07-30 Eltromat Gmbh Anordnung zur Aufnahme eine Bildes von einer Bedruckstoffbahn
DE102019128139A1 (de) * 2019-10-17 2021-04-22 Windmöller & Hölscher Kg Verfahren zum automatischen Fehlermanagement an einer Druckmaschine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2028144A2 (fr) 2007-08-21 2009-02-25 Koenig & Bauer AG Dispositif de surveillance et/ou de réglage d'une bande en mouvement dans une imprimante rotative et procédé de surveillance d'une bande en mouvement
WO2009024579A2 (fr) 2007-08-21 2009-02-26 Koenig & Bauer Aktiengesellschaft Dispositifs et procédé de contrôle et/ou de régulation d'une marche de faisceau dans un système de cônes d'une presse rotative à imprimer
EP2210839A2 (fr) 2007-08-21 2010-07-28 Koenig & Bauer Aktiengesellschaft Dispositif de surveillance et/ou de réglage d'une bande en mouvement dans une imprimante rotative et procédé de surveillance d'une bande en mouvement

Also Published As

Publication number Publication date
ATE361198T1 (de) 2007-05-15
DE502005000645D1 (de) 2007-06-14
EP1619026A3 (fr) 2006-03-15
DE102004052181B3 (de) 2006-01-19
EP1619026A2 (fr) 2006-01-25

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