EP0142995A2 - Procédé et dispositif de repérage pour presse rotative - Google Patents

Procédé et dispositif de repérage pour presse rotative Download PDF

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Publication number
EP0142995A2
EP0142995A2 EP84308036A EP84308036A EP0142995A2 EP 0142995 A2 EP0142995 A2 EP 0142995A2 EP 84308036 A EP84308036 A EP 84308036A EP 84308036 A EP84308036 A EP 84308036A EP 0142995 A2 EP0142995 A2 EP 0142995A2
Authority
EP
European Patent Office
Prior art keywords
plate cylinder
detected
registration
response
registration error
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.)
Granted
Application number
EP84308036A
Other languages
German (de)
English (en)
Other versions
EP0142995A3 (en
EP0142995B1 (fr
Inventor
Tsunehiko Imamoto
Toshiki Sugimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Publication of EP0142995A2 publication Critical patent/EP0142995A2/fr
Publication of EP0142995A3 publication Critical patent/EP0142995A3/en
Application granted granted Critical
Publication of EP0142995B1 publication Critical patent/EP0142995B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • 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 present invention relates to a multicolor rotary press such as a gravure rotary press and more particularly to a registration control method and device therefor.
  • the present invention was made and has for its object to provide a registration control method and device for automatically calculating optimum correction values depending upon the construction of a printing press and in response to printing conditions when registration errors are detected and correcting registration errors quickly in response to the calculated correction values, thereby reducing spoilage to a minimum.
  • the optimized gains Kp and K in PD control are obtained in response to the pass length (1 1 ) between the adjacent plate cylinder units, the pass length (1 2 ) between the plate cylinder and the position at which a register mark is to be detected, the radius (r) of the plate cylinder, the compensator roller displacement velocity (v) and/or the printing speed (V) on the assumption that the correct registration control can be effected by using some of various factors affecting the registration control which can be correctly analyzed and in response to the optimized gains, the position of the shaft of a compensator roller is displaced, thereby accomplishing registration.
  • Fig. 1 shows a prior art registration control device.
  • Fig. 1 only plate cylinder units 11 and 12 with impression cylinders 21 and 22 of a multicolor rotary press are shown.
  • a printing paper of the like is transported from the plate cylinder unit 11 to the plate cylinder unit 12.
  • Guide rollers 23 and a compensator roller 20 are interposed between the plate cylinder units 11 and 12. The deviation between a register mark printed by the preceding plate cylinder and a register mark printed by the succeeding plate cylinder can be made zero by shifting the shaft of the compensator roller 20.
  • the output pulses from a pulse generator PG of the preceding plate cylinder 11 and the output from a scanning head SH disposed adjacent to the succeeding plate cylinder 12 are applied to a mis-registration detection circuit 21.
  • the output of the detection circuit 31 is applied through a PD control circuit 32 to a register motor drive circuit 33 so as to drive a register motor M for shifting the shaft of the compensator roller 20.
  • the control of the displacement of the shaft of the compensator roller 20 is effected by the so-called PD control. That is, a registration error E derived from the detection circuit 31 and its derivative dE/dt are substituted in the following equation (1) so that the drive time At and direction of rotation of the register motor M are obtained. In response to thus obtained drive time and the direction of rotation, the compensator roller is shifted by ⁇ t.
  • Kp proportional gain (constant)
  • K D differential gain (constant)
  • the proportional gain Kp and the differential gain K are constant and depending upon the construction of a printing press and printing conditions such as pass length between units, the position of a scanning head, the velocity of a compensator roll, a printing speed, circumferential lengths of cylinders and so on, hunting results and response is considerably degraded.
  • frequency corrections such as one correction per rotation of a plate cylinder have not been employed, but a method is employed in which one correction is effected for from two to ten rotations of a plate cylinder or in which feedback gains (that is, both Kp and K D are adjusted simultaneously) are changed in order to avoid hunting.
  • a printing paper is guided by a guide roller 23 and passes between the preceding unit comprising the plate cylinder 11 and the impression cylinder 21 so that a first color image is printed on the printing paper. Thereafter the printing paper is transported through guide rollers 23 and the compensator roller 20 to the succeeding unit comprising the plate cylinder 12 and the impression cylinder 22 so that a second color image is printed. Thereafter the printing paper is transported to the succeeding unit through guide rollers or to a discharge unit.
  • a first register mark is printed and in the succeeding unit, a second register mark is printed.
  • These register marks are detected by the scanning head SH disposed behind the position at which the plate cylinder 12 is made into contact with the impression cylinder 22 and the output of the scanning head SH is applied to the mis-registration detection circuit 31.
  • the output signal from the scanning head SH represents a time deviation ATe between the first and second register marks.
  • pulse signals representative of the rotational speed of the plate cylinder 11 that is, the pulse signals representative of the transport speed v of printing paper is applied from the pulse generator PG of the plate cylinder 11 to the mis-registration detection circuit 31.
  • the pulse generator PG generates gate signals for detecting the register marks.
  • the detection circuit 31 calculates a mis-registration or registration error E. That is, where n: the rotational speed of the plate cylinder 11 and r: the radius of the plate cylinder.
  • the registration error E is applied to a PD control circuit 32 so that the register motor drive signal is generated by PD calculation.
  • the register motor M which is rotated at a constant speed is driven by a register motor drive circuit 33 so that the position of the shaft of the compensator roller 20 is controlled. Thus, the registration operation is carried out.
  • a drive time At is given by the following equation:
  • Fig. 2 shows that various factors used in registration control of a multicolor rotary press are all optimized. Experimental results shown in Figs. 3 - 7(a) and 7(b) are compared with those shown in Fig. 2 and evaluated. The optimized conditions as shown in Fig. 2 can be obtained as follows:
  • the compensator roller is shifted for At calculated on the base of 0.5 mm/sec. As a result, the compensator roller is displaced by +0.67 mm at the most from the initial position and remains at the position ⁇ 0.25 mm.
  • the tension applied to printing paper between the adjacent units is 15 + 0.66 kg at the maximum, 15 - 0.02 kg at the minimum and becomes 15.00 kg finally.
  • the registration error E is reduced in time and becomes 0.00 mm finally. Thus, registration is accomplished.
  • Fig. 5(a) shows the characteristic curves when the gain Kp and K D are maintained at the standard values while the pass length 1 2 between the plate cylinder and the position at which the register mark is detected is increased from 0.48 m to 0.88 m. In this case, hunting results.
  • Figs. 6(a) and 6(b) show characteristic curves when the compensator roller displacement velocity v is varied from 0.5 mm/sec to 1 mm/sec while the gains are maintained at the standard values (Fig. 6(a)) and gains are calculated from Eqs. (4) and (5). It is seen that hunting can be suppressed by adjusting the gains Kp and K D .
  • Figs. 7(a) and 7(b) show characteristic curves when only the gain K D is adjusted; that is, when the radius r of the plate cylinder is changed from 0.14 m to 0.08 m.
  • the radius r of the plate cylinder is only contained in Eq. (5) and is not included in Eq. (4). Therefore, when the radius r of the plate cylinder is changed, only the gain K D is changed but the gain Kp remains unchanged.
  • the radius r of the plate cylinder is fundamentally different from the pass length 1 1 between the adjacent units, the pass length 1 2 between the plate cylinder and the position at which the register mark is detected and the compensator roller displacement velocity v explained above with reference to Figs. 4(a) and 4(b) - Figs. 6(a) and 6 (b) .
  • Eqs. (4) and (5) constitute only the essential factors which can be correctly analyzed in registration control.
  • the gains Kp and K D obtained from Eqs. (4) and (5) can better cope with various conditions which are expected to occur in registration control so that it can be said that the registration control system can be remarkably consolidated.
  • Figs. 8 and 9 show characteristic curves obtained when the influence on registration control of other factors such as variations in tension of printing paper, an elongation coefficient of printing paper (which is dependent upon the quality of paper) and so on.
  • Fig. 8 shows the characteristic curves when the tension T of printing paper is changed from 15 kg to 30 kg.
  • the characteristic curves as shown in Fig. 8 are substantially similar'to those shown in Fig. 2.
  • Fig. 9 shows the characteristic curves when the elongation coefficient of printing paper is changed from 0.00022 1/kg to 0.00005 1/kg.
  • the characteristic curves as shown in Fig. 9 are also substantially similar to those as shown in Fig. 2.
  • the gains Kp and K are optimized so that registration control can be carried out with excellent response and stability. As a result, as compared with the conventional registration control system, spoilage can be much reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP19840308036 1983-11-22 1984-11-20 Procédé et dispositif de repérage pour presse rotative Expired - Lifetime EP0142995B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP220148/83 1983-11-22
JP58220148A JPS60110454A (ja) 1983-11-22 1983-11-22 輪転印刷機の見当合わせ制御方法

Publications (3)

Publication Number Publication Date
EP0142995A2 true EP0142995A2 (fr) 1985-05-29
EP0142995A3 EP0142995A3 (en) 1987-06-03
EP0142995B1 EP0142995B1 (fr) 1991-01-23

Family

ID=16746644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840308036 Expired - Lifetime EP0142995B1 (fr) 1983-11-22 1984-11-20 Procédé et dispositif de repérage pour presse rotative

Country Status (3)

Country Link
EP (1) EP0142995B1 (fr)
JP (1) JPS60110454A (fr)
DE (1) DE3484005D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009005821A1 (de) * 2009-01-22 2010-07-29 Robert Bosch Gmbh Verfahren zur Registerkorrektur bei einer Bearbeitungsmaschine sowie Bearbeitungsmaschine
EP2343186A1 (fr) * 2010-01-11 2011-07-13 Goss International Americas, Inc. Presse d'impression oscillante à longueur variable pour bande, et procédé

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101173145B1 (ko) 2009-06-17 2012-09-05 한국기계연구원 인쇄 장치 및 그 제어 방법
JP6096505B2 (ja) * 2012-12-25 2017-03-15 富士機械工業株式会社 印刷装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2615371C2 (de) * 1976-04-08 1982-04-01 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur Registerregelung bei Rotationsdruckmaschinen
US4264957A (en) * 1979-05-23 1981-04-28 Zerand Corporation Apparatus and method for register control in web processing apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009005821A1 (de) * 2009-01-22 2010-07-29 Robert Bosch Gmbh Verfahren zur Registerkorrektur bei einer Bearbeitungsmaschine sowie Bearbeitungsmaschine
EP2343186A1 (fr) * 2010-01-11 2011-07-13 Goss International Americas, Inc. Presse d'impression oscillante à longueur variable pour bande, et procédé

Also Published As

Publication number Publication date
JPS60110454A (ja) 1985-06-15
EP0142995A3 (en) 1987-06-03
EP0142995B1 (fr) 1991-01-23
DE3484005D1 (de) 1991-02-28

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