EP1230086B1 - Verfahren zur gravur von druckzylindern - Google Patents
Verfahren zur gravur von druckzylindern Download PDFInfo
- Publication number
- EP1230086B1 EP1230086B1 EP00983066A EP00983066A EP1230086B1 EP 1230086 B1 EP1230086 B1 EP 1230086B1 EP 00983066 A EP00983066 A EP 00983066A EP 00983066 A EP00983066 A EP 00983066A EP 1230086 B1 EP1230086 B1 EP 1230086B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engraving
- burin
- control signal
- harmonics
- frequency spectrum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/02—Engraving; Heads therefor
- B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
- B41C1/045—Mechanical engraving heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/16—Correction processes or materials
Definitions
- the invention relates to the field of electronic reproduction technology and relates to a method for engraving printing cylinders in an electronic Engraving machine, an engraving tool monitoring device for one electronic engraving machine and an electronic engraving machine with such an engraving stylus monitoring device.
- an engraving element which essentially consists of a rotating system and an electromagnetic drive for the rotating system consists.
- the rotation system has a shaft, an anchor, a bearing for the shaft, a reset element and a damping device.
- the electromagnetic Drive for the turning system has one with the engraving control signal applied excitation coil and a stationary permanent magnet on, in the armature of the rotating system moves its air gap. The drive causes a rotary movement of the shaft oscillating by small angles, and the stylus holder the engraving stylus leads to a corresponding engraving of the cups oscillating stroke movement in the direction of the outer surface of the printing cylinder.
- the invention is therefore based on the object of a method for engraving Printing cylinders in an electronic engraving machine, an engraving stylus monitoring device for an electronic engraving machine and one electronic engraving machine with such an engraving tool monitoring device to indicate with which the loss of time in printing form production, that occurs in the event of damage to an engraving stylus during engraving, is advantageously reduced.
- This task is related to the process of engraving printing cylinders by the features of claim 1, relating to the engraving stylus monitoring device by the features of claim 8 and with respect to electronic engraving machine solved by the features of claim 9.
- Fig. 1 shows a block diagram of an electronic engraving machine, for example a HelioKlischograph® from Hell Gravure Systems GmbH, Kiel, DE, is.
- a pressure cylinder (1) is driven by a rotary drive (2).
- An engraving device (3) with an engraving stylus (4) as a cutting tool is on one Engraving carriage (5) mounted, which is by means of a feed drive (6) driven spindle (7) in the axial direction of the rotating printing cylinder (1) is movable.
- the engraving element (3) is, for example, an electromagnetic one Drive for the engraving stylus (4) equipped.
- the engraving stylus (4) can but also from a solid-state actuator element made of a piezoelectric or magnetostrictive material can be controlled.
- the engraving element (3) engraves a printing form (8) by means of an analog one Engraving control signal GS controlled engraving stylus (4) engraving lines one by one Sequence of wells arranged in a printing grid in the lateral surface of the Printing cylinder (1) cuts while the engraving carriage (5) with the engraving member (3) for extensive engraving step by step or continuously in axial Direction along the rotating pressure cylinder (1) moved.
- the engraving control signal GS on a line (9) is in an engraving amplifier (10) by superimposing a periodic raster signal R on a line (11) with an image signal B on a line (12) which generates the tonal values representing the well to be engraved between "light" and depth the raster signal R an oscillating stroke movement of the engraving stylus (4)
- the engraving of the cells arranged in the printing grid determines the Image signal values B correspond to the depths of cut in accordance with the tonal values to be reproduced the cell.
- the image signal B is in a D / A converter (13) from engraving data GD of the printing form (8) to be engraved.
- the engraving data GD are stored in an engraving data memory (14) from which they are engraved lines read out and fed to the D / A converter (13) via a data bus (15).
- the engraving locations of the cells on the printing cylinder (1) specified by the printing grid are defined by the location coordinates (x, y) of a coordinate system assigned to the lateral surface of the printing cylinder (1), the X axis of which in the axial direction and the Y axis in the circumferential direction of the printing cylinder (1) are aligned.
- the feed drive (6) generates the x location coordinates and a pulse generator (16) mechanically coupled to the pressure cylinder (1) generates the y location coordinates.
- the xy location coordinates are fed to an engraving control unit (18) via lines (17).
- the engraving control unit (18) generates the raster signal R on the line (11), read addresses for the engraving data memory (14) on an address bus (19) and signals for controlling and synchronizing the engraving process, for example a control signal SS 1 for the rotary drive (2) a line (20) and a control signal SS 2 for the feed drive (6) on a line (21).
- the engraving machine has an engraving stylus monitoring device (23) in which the functionality of the engraving stylus (4) of the engraving member (3) is automatically checked during the engraving on the basis of the engraving control signal GS and in the event of damage to the engraving stylus (4 ), especially in the event of a stylus break, a control signal KS is generated.
- the functionality of the engraving stylus (4) is checked by examining harmonics in the engraving control signal GS that are characteristic of damage to the engraving stylus (4).
- the engraving control signal GS is fed to the engraving stylus monitoring device (23) from the engraving amplifier (10) via a line (25).
- the control signal KS which passes via a line (24) to the engraving controller (18), activated in the event of a Stichelbruchs the rotary drive (2) and the feed drive (6) by means of control signals SS 1 and SS 2 on the lines (20, 21 ) to cancel the engraving.
- the stylus break can be signaled acoustically or optically with the aid of the control signal KS.
- the innovation has the advantage that the signaling of a stylus break To save time, start engraving a new impression cylinder (1) immediately can be. Due to the engraving termination in the event of a broken stylus, especially with an automatic engraving process, prevents damage occur on the engraving element (3) or on the engraving machine itself can.
- Fig. 2 shows a basic embodiment for the engraving stylus monitoring device (23).
- the engraving control current I GS supplied via the line (25) is converted at a measuring resistor (26) into a measuring voltage U M , which is connected via a capacitor (27) to separate the AC voltage component to an A / D Converters (28) arrive and are converted there into measurement data MD.
- the measurement data MD are fed via a measurement data bus (29) to a signal processor (30), which can preferably be designed as a digital signal processor (DSP), for example of the TMS 320C31 type from Texas Instruments.
- DSP digital signal processor
- the measurement data MD are continuously superimposed on the signal processor (30) Harmonics are investigated and, for example, by a Fast Fourier transformation (FFT) determined the frequency spectrum of the harmonics.
- FFT Fast Fourier transformation
- the determined frequency spectra with a previously created and saved frequency spectrum compared, which is characteristic of an undamaged engraving stylus (4) is. If the frequency spectra do not match, there is damage of the engraving stylus (4) before, and there will be the control signal KS on the line (24) generated.
- the determined frequency spectra can also be used a frequency spectrum characteristic of a damaged engraving stylus (4) are compared, in which case the correction signal KS at Agreement of the frequency spectra is generated.
- the ratio of the useful signal to the interference signal is advantageously reduced by filtering the harmonics to be analyzed from the measuring voltage U M using a suitable filter (31), the filtering being carried out as a function of the frequency of the raster signal R.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Description
Es zeigen:
- Fig. 1
- ein Blockschaltbild einer elektronischen Graviermaschine mit einer Gravierstichel-Überwachungsvorrichtung und
- Fig. 2
- ein prinzipielles Ausführungsbeispiel für eine Gravierstichel-Überwachungsvorrichtung.
Das Graviersteuersignal GS wird der Gravierstichel-Überwachungsvorrichtung (23) von dem Gravierverstärker (10) über eine Leitung (25) zugeführt. Das Kontrollsignal KS, das über eine Leitung (24) an das Graviersteuerwerk (18) gelangt, schaltet im Fall einer Stichelbruchs den Rotationsantrieb (2) und den Vorschubantrieb (6) mittels der Steuersignale SS1 und SS2 auf den Leitungen (20, 21) zwecks Abbruch der Gravur aus. Gleichzeitig oder alternativ kann der Stichelbruch mit Hilfe des Kontrollsignals KS akustisch oder optisch signalisiert werden.
Claims (9)
- Verfahren zur Gravur von Druckzylindern in einer elektronischen Graviermaschine, bei demein Graviersteuersignal (GS) aus einem Bildsignal, welches die Tonwerte von zu gravierenden Näpfchen repräsentiert, und einem periodischen Rastersignal (R) zur Erzeugung eines Druckrasters gebildet wird undein durch das Graviersteuersignal (GS) gesteuerter Gravierstichel (4) eines Gravierorgans (3) gravierlinienweise eine Druckform (8) in Form von in dem Druckraster angeordneten Näpfchen in einen rotierenden Druckzylinder (1) graviert, dadurch gekennzeichnet, daßdas Graviersteuersignal (GS) während der Gravur laufend auf für eine Beschädigung des Gravierstichels (4) charakteristische Oberwellen untersucht wird undbei Vorhandensein der charakteristischen Oberwellen ein die festgestellte Beschädigung, insbesondere einen Bruch, des Gravierstichels (4), signalisierendes Kontrollsignal (KS) erzeugt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Untersuchungder Oberwellen des Graviersteuersignals (GS) durch eine digitale Filterung, vorzugsweise durch eine Fast-Fourier-Transformation, erfolgt.
- Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daßdas durch die digitale Filterung ermittelte Frequenzspektrum der Oberwellen mit einem für einen unbeschädigten Gravierstichel (4) charakteristischen Frequenzspektrum verglichen wird undbei Abweichung der Frequenzspektren das Kontrollsignal (KS) erzeugt wird.
- Verfahren nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die zu untersuchenden Oberwellen zur Verkleinerung des Verhältnisses von Nutzsignal zum Störsignal aus dem Graviersteuersignal (GS) herausgefiltert werden.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Filterung in Abhängigkeit von der Frequenz des Rastersignals (R) erfolgt.
- Verfahren nach mindestens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß eine festgestellte Beschädigung des Gravierstichels (4) durch das Kontrollsignal (KS) akustisch oder optisch signalisiert wird.
- Verfahren nach mindestens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß bei einer festgestellten Beschädigung des Gravierstichels (4) die Gravur des Druckzylinders (1) durch das Kontrollsignal (KS) abgebrochen wird.
- Gravierstichel-Überwachungsvorrichtung für eine elektronische Graviermaschine zur Gravur von Druckzylindern (1) mittels eines durch ein Graviersteuersignal (GS) gesteuerten Gravierstichels (4), dadurch gekennzeichnet, daßdie Gravierstichel-Überwachungsvorrichtung (23) mit dem Graviersteuersignal (GS) beaufschlagt ist,das Graviersteuersignal (GS) durch eine digitale Filterung, vorzugsweise durch eine Fast-Fourier-Transformation, auf für eine Beschädigung des Gravierstichels (4) charakteristische Oberwellen untersucht wird,das durch die digitale Filterung ermittelte Frequenzspektrum der Oberwellen mit einem für einen unbeschädigten Gravierstichel (4) charakteristischen Frequenzspektrum verglichen wird undbei Abweichung der Frequenzspektren ein eine festgestellte Beschädigung, insbesondere einen Bruch, des Gravierstichels (4), signalisierendes Kontrollsignal (KS) erzeugt wird.
- Graviermaschine zur Gravur von Druckzylindern, bestehend aus einem rotationsfähig gelagerten Druckzylinder (1) und einem Gravierorgan (3) mit einem durch ein Graviersteuersignal (GS) gesteuerten Gravierstichel (4), welcher gravierlinienweise eine Folge von in einem Gravurraster angeordneten Näpfchen in den rotierenden Druckzylinder (1) eingraviert, wobei das Gravierorgan (3) zur flächenhaften Gravur axial an dem rotierenden Druckzylinder (1) entlang verschiebbar ist, dadurch gekennzeichnet, daßdie Graviermaschine eine mit dem Graviersteuersignal (GS) beaufschlagte Gravierstichel-Überwachungsvorrichtung (23) aufweist, in derdas Graviersteuersignal (GS) durch eine digitale Filterung, vorzugsweise durch eine Fast-Fourier-Transformation, auf für eine Beschädigung des Gravierstichels (4) charakteristische Oberwellen untersucht wird.das durch die digitale Filterung ermittelte Frequenzspektrum der Oberwellen mit einem für einen unbeschädigten Gravierstichel (4) charakteristischen Frequenzspektrum verglichen wird undbei Abweichung der Frequenzspektren ein die festgestellten Beschädigung, insbesondere einen Bruch, des Gravierstichels (4) signalisierendes Kontrollsignal (KS) erzeugt wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19952995A DE19952995A1 (de) | 1999-11-04 | 1999-11-04 | Verfahren zur Gravur von Druckzylindern |
DE19952995 | 1999-11-04 | ||
PCT/DE2000/003791 WO2001032420A1 (de) | 1999-11-04 | 2000-10-27 | Verfahren zur gravur von druckzylindern |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1230086A1 EP1230086A1 (de) | 2002-08-14 |
EP1230086B1 true EP1230086B1 (de) | 2003-07-16 |
Family
ID=7927840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00983066A Expired - Lifetime EP1230086B1 (de) | 1999-11-04 | 2000-10-27 | Verfahren zur gravur von druckzylindern |
Country Status (5)
Country | Link |
---|---|
US (1) | US7102794B1 (de) |
EP (1) | EP1230086B1 (de) |
JP (1) | JP3496027B2 (de) |
DE (2) | DE19952995A1 (de) |
WO (1) | WO2001032420A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2008100847A4 (en) * | 2007-10-12 | 2008-10-09 | Bluescope Steel Limited | Method of forming textured casting rolls with diamond engraving |
US9372996B2 (en) | 2014-05-15 | 2016-06-21 | International Business Machines Corporation | Protecting data owned by an operating system in a multi-operating system mobile environment |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4087801A (en) * | 1974-12-20 | 1978-05-02 | Tokyo Shibaura Electric Co., Ltd. | Apparatus for detecting damages of cutting tools |
DE3029957C2 (de) * | 1980-08-07 | 1983-05-11 | Siemens AG, 1000 Berlin und 8000 München | Vorrichtung zum Feststellen des Verschleißes an Schneidwerkzeugen unter Auswertung der am Schneidwerkzeug auftretenden Schwingungen |
US5440398A (en) * | 1993-02-25 | 1995-08-08 | Ohio Electronic Engravers, Inc. | Error detection apparatus and method for use with engravers |
US6362899B1 (en) * | 1993-02-25 | 2002-03-26 | Mdc Max Daetwyler Ag | Error detection apparatus and method for use with engravers |
DE19722996A1 (de) * | 1997-06-02 | 1998-12-03 | Heidelberger Druckmasch Ag | Verfahren zur Signalverarbeitung |
DE19801472A1 (de) * | 1998-01-16 | 1999-07-22 | Heidelberger Druckmasch Ag | Verfahren zur Ermittlung von Einstellwerten |
JP4562051B2 (ja) * | 1999-11-30 | 2010-10-13 | 独立行政法人産業技術総合研究所 | 損耗センサ付き切削工具の信号処理装置および信号処理方法 |
-
1999
- 1999-11-04 DE DE19952995A patent/DE19952995A1/de not_active Ceased
-
2000
- 2000-10-27 JP JP2001534602A patent/JP3496027B2/ja not_active Expired - Fee Related
- 2000-10-27 US US10/110,645 patent/US7102794B1/en not_active Expired - Fee Related
- 2000-10-27 EP EP00983066A patent/EP1230086B1/de not_active Expired - Lifetime
- 2000-10-27 DE DE50002935T patent/DE50002935D1/de not_active Expired - Fee Related
- 2000-10-27 WO PCT/DE2000/003791 patent/WO2001032420A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
JP3496027B2 (ja) | 2004-02-09 |
EP1230086A1 (de) | 2002-08-14 |
DE19952995A1 (de) | 2001-05-10 |
JP2003527256A (ja) | 2003-09-16 |
DE50002935D1 (de) | 2003-08-21 |
WO2001032420A1 (de) | 2001-05-10 |
US7102794B1 (en) | 2006-09-05 |
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