EP0743179A2 - System und Verfahren zum Steuern der Druckplattenregister-Vorrichtung einer Rotationsdruckmaschine - Google Patents

System und Verfahren zum Steuern der Druckplattenregister-Vorrichtung einer Rotationsdruckmaschine Download PDF

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Publication number
EP0743179A2
EP0743179A2 EP96107349A EP96107349A EP0743179A2 EP 0743179 A2 EP0743179 A2 EP 0743179A2 EP 96107349 A EP96107349 A EP 96107349A EP 96107349 A EP96107349 A EP 96107349A EP 0743179 A2 EP0743179 A2 EP 0743179A2
Authority
EP
European Patent Office
Prior art keywords
plate
drive
adjustment
recited
pulse train
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.)
Withdrawn
Application number
EP96107349A
Other languages
English (en)
French (fr)
Other versions
EP0743179A3 (de
Inventor
Stanley Momot
Richard Fedrigon
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.)
Goss International LLC
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Publication of EP0743179A2 publication Critical patent/EP0743179A2/de
Publication of EP0743179A3 publication Critical patent/EP0743179A3/de
Withdrawn legal-status Critical Current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
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B41F13/14—Registering devices with means for displacing the cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/0008—Driving devices

Definitions

  • the present invention is related generally to control systems for plate register mechanisms in printing presses and, more particularly, to a control system for a plate register mechanism in a rotary printing press and a method for controlling the plate register mechanism.
  • Modern web fed printing presses pass the web through a plurality of printing stands to perform a printing function at each stand. This is true, for example, in a printing operation where multiple colors are being printed on the web.
  • the electronic control systems were subsequently developed to replace these antiquated manual systems.
  • the electronic control systems typically consisted of alternating current (AC) motors, such as synchronous motors, which electrically activate the appropriate screw threads and gearing of the plate register mechanisms. Operation of the AC motors is typically controlled by a conventional feedback circuit.
  • the feedback circuit includes a feedback network comprised of sensors which detect the position of the motor shafts. This position information is then used by a microprocessor, or other logic device, to control operation of the AC motors.
  • a feedback network in these previous control circuits increases the complexity and cost of the control systems. In addition, the accuracy and response of these feedback systems are less than desired.
  • stepper motors which control operation of the motors based on time. For example, suppose a stepper motor rotates at 7,000 steps in 10 seconds. To rotate the motor 7,000 steps, the control system connects electrical power to the motor for 10 seconds. The motor would ostensibly have moved 7,000 steps in 10 seconds. Unfortunately, this is not exactly the case.
  • Stepper motors do not instantaneously achieve full speed.
  • the stepper motor therefore spends an initial portion of the 10 seconds at less than full speed and does not rotate the full 7000 steps in the 10 seconds. This causes accuracy errors in the prior control systems. In addition, these errors accumulate as the motors continue to operate.
  • a control system and method for a plate register mechanism in a printing press for controlling position of a plate cylinder wherein a pulse train signal is generated having a number of pulses representative of the desired adjustment of the plate cylinder.
  • the present invention provides accurate control without a feedback circuit.
  • a control system for a plate register mechanism for adjusting position of a plate cylinder in a rotary printing press comprises a computer circuit for receiving plate adjustment commands representative of desired plate adjustment from an operator of the printing press, and for generating a pulse train signal comprised of a number of pulses which is representative of the desired plate adjustment.
  • a drive unit supplies drive power based on the number of pulses in the pulse train signal.
  • a drive mechanism drives the plate register mechanism in response to the drive power to produce the desired plate adjustment.
  • the computer circuit may comprise position means for determining lateral position of the plate cylinder based on the number of pulses in the pulse train signal.
  • the position means for determining circumferential position of the plate cylinder based on the number of pulses in the pulse train signal Preferably, the drive mechanism comprises at least one stepper motor for driving the plate register mechanism in response to the drive power.
  • the computer circuit may generate a drive enable signal in response to the desired plate adjustment for selecting one of the at least one stepper motor.
  • a drive enable signal in response to the drive enable signal, at least one relay in the drive mechanism supplies the drive potter to the selected one of the at least one stepper motor.
  • a control system shown generally as reference numeral 100 in Fig. 2, for a plate register mechanism 102 provides accurate control of the lateral and circumferential position of a plate cylinder, generally designated by reference numeral 104, in a rotary printing press.
  • the plate register mechanism 102 comprises a plate register frame 106 for mounting the mechanism 102 on the printing press.
  • a first stepper motor 108 effects the lateral position, commonly designated sidelay, of a journal 110 on one end of the plate cylinder 104.
  • the motor 108 activates a sidelay drive gear 112 through a worm gear 114.
  • the sidelay drive gear 112 drives a sidelay sprocket 116 which, in turned, drives a cylinder drive gear 118.
  • the cylinder drive gear 118 turns an externally threaded shaft 120 to effectuate lateral movement of the journal 110, and thus the plate cylinder 104, via a journal attachment mechanism 122.
  • the shaft 120 is in threaded engagement with an internally threaded, stationary sidelay nut 124 such that rotation of the shaft 120 tends to cause longitudinal movement of the shaft 120. Consequently, the first stepper motor 108 controls lateral movement of the plate cylinder 104.
  • a second stepper motor 126 controls the circumferential position of the plate cylinder 104.
  • the second motor 126 drives a circumferential drive gear 128 through a worm gear 130.
  • the worm gear 130 rotates a circumferential sprocket 132 having teeth which are meshed with teeth of a circumferential rotational gear 134.
  • the circumferential rotational gear 134 is rigidly connected to an internally threaded sleeve 136 and a cylinder drive gear attachment assembly 138.
  • the cylinder drive gear attachment assembly 138 consists of a shoulder 138a rigidly mounted on the sleeve 136 and a thrust bearing 138b interposed between the shoulder 138a and an attachment ring 138c which is connected to a main cylinder drive gear 140 mounted on one end of the journal 110.
  • the internal threads of the threaded sleeve 136 are meshed with the external threads of the shaft 120 and, therefore, rotation of the sleeve 136 causes the sleeve 136 to move either toward or away from the cylinder drive gear 118.
  • the axial movement of the sleeve 136 creates an axial stress in the thrust bearing 138b which is transmitted to the main cylinder drive gear 140.
  • Helical teeth on the drive gear 140 translate this axial force into rotational, or circumferential, movement of the plate cylinder 104.
  • plate register mechanism 102 Since the specific structure and philosophy behind the plate register mechanism 102 is not important to the present invention beyond producing lateral and circumferential adjustment of the plate cylinder 104 in response to the first and second stepper motors 108, 126, they will not be further discussed. However, a detailed description of such a mechanism is provided in commonly assigned U.S. Patent No. 4,709,634, the disclosure of which is hereby incorporated by reference. Although plate register mechanism 102 is shown being a unitary device for adjusting both lateral and circumferential position of the plate cylinder 104, the control system 100 of the present invention may be advantageously employed with plate adjustment mechanisms which include only lateral or circumferential position adjustment.
  • FIG. 2 A block diagram of the control system 100 for controlling the operation of the plate register mechanism 102 to adjust the position of the plate cylinder 104 is shown in Fig. 2.
  • the system 100 is shown having first, second, third and fourth stepper motors 108, 126, 142, 144 for providing lateral and circumferential register for a dual web printing press.
  • the motors 108, 126, 142, 144 are M062-TE09 SLO-SYN® DC Step Motor manufactured by Superior Electric Of Bristol, Connecticut.
  • First and third motors 108, 126 control the lateral adjustment of the plate cylinder of each web and second and fourth motors 142, 144 control the circumferential adjustment of the plate cylinder of each web.
  • the third and fourth motors 142, 144 are connected to a plate register mechanism which operates in a manner similar to the operation of the plate register mechanism 102 described above.
  • the operator of the printing press provides plate adjustment commands 146 to a host computer 148.
  • the plate adjustment commands 146 are representative of desired plate cylinder register, preferably both lateral and circumferential adjustment, as typically determined by the operator based on a visual inspection of the printed web in a well known manner.
  • the operator may use any of a number of means, such as a keyboard, mouse, a touch screen and the like, to provide the commands 146 to the host computer 148.
  • the host computer 148 transmits these commands 146, or a signal representative thereof, to a microprocessor 150.
  • the host computer 148 and the microprocessor 150 comprise a computer circuit 152.
  • the microprocessor 150 In response to the commands from the host computer 148, the microprocessor 150 generates a pulse train signal 154 which is transmitted to a drive unit 156.
  • One drive unit which may be advantageously employed in the present invention is the Superior Electric SLO-SYN® Model SS2000MD4 Translator/Drive.
  • the number of pulses in the pulse train signal 154 being representative of desired plate cylinder adjustment.
  • the microprocessor 150 also sends a direction signal 158 to the drive unit 156 representative of the direction (clockwise or counterclockwise) one of the stepper motors is to be driven.
  • the microprocessor 150 determines the number of pulses contained in the pulse train signal 154 based on various factors, such as the number of pulses required to complete a rotation of a stepper motor shaft and the gear ratios of the gearing in the plate register mechanism 102.
  • a typical stepper motor has two hundred (200) steps per revolution or, alternatively, four hundred (400) half-steps per revolution.
  • the gearing in the plate register mechanism 102 may, for example, be selected such that approximately 90,000 pulses are required to move either the sidelay or circumferential registration across its entire range of motion.
  • the above numbers are only exemplary and can easily be designed to any specific application of the invention.
  • the microprocessor 150 stores the number of pulses contained in the pulse train signal 154 in a memory 159.
  • Position means 160 tracks the number of pulses transmitted to continually monitor the sidelay and circumferential positions of the plate cylinder 104.
  • the microprocessor 150 sends out a plurality of pulses to drive the shafts of the motors 108, 126, 142, 144 into a mechanical stop. This provides a reference position from which the microprocessor 150 can monitor the positions of the shaft of each motor 108, 126, 142, 144.
  • the drive unit 156 provides drive power 161 in response to the pulse train signal 154.
  • the drive power 161 is supplied to first, second, third and fourth relays 162, 164, 166, 168.
  • Each relay 162, 164, 166, 168 is connected to a corresponding one of the stepper motors 108, 126, 142, 144.
  • each relay 162, 164, 166, 168 connects the drive power 161 to its respective motor 108, 126, 142, 144.
  • the relays 162, 164, 166, 168 and the motors 108, 126, 142, 144 in combination, comprise a drive mechanism 170.
  • Each of the relays 162, 164, 166, 168 is energized by a corresponding drive enable signal 172, 174, 176, 178 from the microprocessor 150.
  • the microprocessor 150 sends the drive enable signal 172 to the relay 162 to connect the drive power 161 to the motor 108.
  • the microprocessor 150 may be programmed to energize one or more of the relays at any one instant.
  • the microprocessor 150 generates an reset signal 180 which enables and disables output transistors in the drive unit 156.
  • the present invention thus advantageously permits operation of four stepper motors 108, 126, 142, 144 with the single drive unit 156.
  • the relays 162, 164, 166, 168 are conventional four pole double throw relays.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP96107349A 1995-05-17 1996-05-09 System und Verfahren zum Steuern der Druckplattenregister-Vorrichtung einer Rotationsdruckmaschine Withdrawn EP0743179A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US44292795A 1995-05-17 1995-05-17
US442927 1995-05-17

Publications (2)

Publication Number Publication Date
EP0743179A2 true EP0743179A2 (de) 1996-11-20
EP0743179A3 EP0743179A3 (de) 1997-12-17

Family

ID=23758724

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107349A Withdrawn EP0743179A3 (de) 1995-05-17 1996-05-09 System und Verfahren zum Steuern der Druckplattenregister-Vorrichtung einer Rotationsdruckmaschine

Country Status (6)

Country Link
EP (1) EP0743179A3 (de)
JP (1) JPH09123426A (de)
KR (1) KR960040654A (de)
CN (1) CN1138526A (de)
AU (1) AU5223896A (de)
SG (1) SG42405A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7171900B2 (en) * 2003-06-09 2007-02-06 Goss International Corporation Variable format offset printing machine
CN1579761A (zh) * 2003-08-05 2005-02-16 孙莉 轮转印刷机前置式套准电控全自动系统及前置式套准方法
JP2005132040A (ja) * 2003-10-31 2005-05-26 Tohoku Ricoh Co Ltd 印刷装置及び印刷方法
DE102004019136A1 (de) * 2004-04-16 2005-11-10 Man Roland Druckmaschinen Ag Direktantrieb für einen Zylinder einer Verarbeitungsmaschine
CN103538357B (zh) * 2013-10-17 2016-08-17 上海紫明印刷机械有限公司 印版滚筒位置校准装置
CN106042611B (zh) * 2016-07-14 2019-05-28 中山松德新材料装备有限公司 一种锂电池极片凹版机自动套印系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096565A2 (de) * 1982-06-04 1983-12-21 Harris Graphics Corporation Vorrichtung und Verfahren zum Messen des Umfangsregisters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096565A2 (de) * 1982-06-04 1983-12-21 Harris Graphics Corporation Vorrichtung und Verfahren zum Messen des Umfangsregisters

Also Published As

Publication number Publication date
KR960040654A (ko) 1996-12-17
SG42405A1 (en) 1997-08-15
CN1138526A (zh) 1996-12-25
JPH09123426A (ja) 1997-05-13
EP0743179A3 (de) 1997-12-17
AU5223896A (en) 1996-11-28

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