GB2271444A - Positioning printing press servo-drives - Google Patents

Positioning printing press servo-drives Download PDF

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Publication number
GB2271444A
GB2271444A GB9320687A GB9320687A GB2271444A GB 2271444 A GB2271444 A GB 2271444A GB 9320687 A GB9320687 A GB 9320687A GB 9320687 A GB9320687 A GB 9320687A GB 2271444 A GB2271444 A GB 2271444A
Authority
GB
United Kingdom
Prior art keywords
printing press
computing
control apparatus
actuators
press according
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
GB9320687A
Other versions
GB2271444B (en
GB9320687D0 (en
Inventor
Holger Dick
Jurgen Marschar
Gerhard Pannars
Reinhard Broghammer
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of GB9320687D0 publication Critical patent/GB9320687D0/en
Publication of GB2271444A publication Critical patent/GB2271444A/en
Application granted granted Critical
Publication of GB2271444B publication Critical patent/GB2271444B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B41F31/045—Remote control of the duct keys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0009—Central control units
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
    • G05B19/33—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an analogue measuring device
    • G05B19/35—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an analogue measuring device for point-to-point control
    • G05B19/351—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an analogue measuring device for point-to-point control the positional error is used to control continuously the servomotor according to its magnitude
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/34—Director, elements to supervisory
    • G05B2219/34215—Microprocessor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37462—Resistor, potentiometers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/41—Servomotor, servo controller till figures
    • G05B2219/41276—Displacement as function of width, amplitude pulse to motor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42211—Command position by time value, proportional to total displacement
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42214—Near desired position, control actuator by pulse in each clock, otherwise continuously
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45187—Printer

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

To adjust actuators of a printing press with high positioning accuracy, within a preset range about the respective setpoint position, a computing/control apparatus 5 energizes the motors so that all actuators are moved by the same distance during one clock period (tper), i.e. irrespective of any external parameters. <IMAGE>

Description

2271444 1 A PRINTING PRESS HAVING APPARATUS FOR THE POSITIONING OF
SERVO-DRIVES ON THE PRESS The invention relates to a printing press having apparatus for the positioning of servo-drives on the printing press, with a servo-drive consisting of a motor, connected to an actuator, and of a potentiometer, said potentiometer determining the actual position of the actuator, and with a computing/control apparatus being provided, said computing/control apparatus adjustingly energizing the servomotors should the actual positions deviate from the preset setpoint positions.
A printing press is provided with a multiplicity of actuators, which must be positioned with a very high degree of accuracy. This is the only way of complying with the high quality demands placed on the printed products. Such actuators may be, for example, the ink keys, which permit the zonewise metering of the ink supply to the individual printing units. Depending on the model of printing press. each plate cylinder of the printing press is associated with 32 ink keys with the corresponding servo-motors and position sensors. Furthermoref the rotational travel of the ink-duct rollers is regulated by means of separate servo-motors. Additional precisely operating actuators are used to adjust the plate cylinders for register correction in the circumferential and lateral directions.
The requirements with regard to the positioning accuracy of the actuators can be impressively illustrated with reference to the lateral- and circumferential-register adjustment of the plate cylinders. Since register errors even in the micron range have a negative impact on the printed quality, the positioning drives must operate accurately down to the micron range.
The object of the invention is to propose an apparatus that makes it possible to carry out adjustment operations on actuators of a printing press with high positioning accuracy.
The object of the invention is achieved in thati within a preset range (distance) about the setpoint positions, the computing/control apparatus energizes the motors in such a manner that all actuators are moved by the same distance during one clock period t,;,.,.
Outside of a preset range about the setpoint value, the motors are moved continuously. Within the preset range, the motors are switched to stepping mode. This makes it possible to prevent overshooting the setpoint position. At the same time, the apparatus according to the invention ensures that, irrespective of any external parameters, all the actuators in question are moved by the same distance during one clock period. External parameters are. in this connection, the various characteristics of the motors, such as the mechanical inertia, the stiffness or ease of movement of the motor, which may possibly be caused by fouling of the coupling element between motor and actuator. This term "external parameters" also encompasses the differences in voltage drop. occurring as a result of the different lengths of the cables to the individual printing units.
In addition, the apparatus according to the invention ensures the continuous adjustment of actuators. with it being guaranteed that all energized motors are moved by the same distance in identical periods of time. It is therefore possible to adjust all ink keys on a printing unit while the printing process is in progress - this possibly being required as a response to a sudden change in the external process parameters without waste having to be printed during the adjustment process.
The apparatus according to the invention basically allows two advantageous variants: the computing/control apparatus either varies the pulse length t. while the voltage remains constant, or it keeps the pulse length t,,, constant and varies the voltage.
As already mentioned, the actuators may be ink keys, actuators for correction of the plate cylinders in the circumferential and/or lateral direction, or duct rollers.
According to a further development of the apparatus according to the invention. it is provided that the computing/control apparatus continuously energizes the motors should there be deviations of the actual positions from the setpoint positions, said deviations being outside of the preset range (distance). Normally. this feature is utilized only during the presetting of the printing press. This measure makes it possible to shorten the setting-up time for the printing press.
In an embodiment of the apparatus according to the invention, it is proposed that the computing/control apparatus operates a warning apparatus should a maximum pulse duration for the adjustment of a defined distance be exceeded. Said warning apparatus may be. for example, a display on the control desk of the printing press. From the inadequate response of the actuator to an energization pulse, therefore, it is concluded that the actuator in question is defective.
The invention is explained in greater detail with reference to the following drawings, in which:
Fig. 1 shows a schematic side view of a printing press; Fig. 2 shows a circuit arrangement of the apparatus according to the invention; Fig. 3a shows a control signal for a motor; Fig. 3b shows a corrected control signal for a motor; and Fig. 4 shows a flow diagram for the energization of an actuator.
Fig. 1 shows a schematic side view of a printing press 1 with printing units 2, a feeder 3 and a delivery 4. Actuators 10 (not shown separately) of the printing press 1 are connected to a computing/control apparatus 5 by means of connecting lines 6. Said computinglcontrol apparatus 5 is integrated into a control desk. A display 7 is disposed on the top side of the control desk. Said display 7 serves, among other things, to indicate the functions of individual actuators 10 on the printing press 1.
Fig. 2 shows a circuit arrangement of the apparatus according to the invention. According to the invention, the computing/control apparatus 5 energizes the motor 9 through the intermediary of a power section 8 in such a manner that the motor 9 is operated in stepping mode. The pulse duration t,;, is dimensioned such that the motor 9 covers a defined distance within one clock period t The instantaneous position of the motor 9 and - thus the instantaneous position of the actuator 10 are detected through the intermediary of a feedback potentiometer 11 and are supplied via an A/D converter 12 to the computing/control apparatus 5.
Fig. 3a shows a control signal for the energization of the motor 9. Since, as a result of differences in motor characteristics, not all motors 9 move the connected actuator 10 by the same distance given an identical pulse duration t,,, the computing/control apparatus 5 corrects the pulse duration t,, according to the invention in such a manner that. within the same clock period all actuators 10 are moved by the same distance. The corrected pulse length tl. t,,2 of the control signal is shown in Fig. 3b. If the travel distance of an actuator 10 is greater than the travel distance associated with a specific pulse length t,,, then the computinglcontrol apparatus 5 reduces the pulse length (t,,%); in the reverse case, the pulse length (t,,2) is increased.
Fig. 4 shows a flow diagram for the energization of an actuator 10. The program starts at 13. An actualsetpoint deviation (actual-setpoint) is calculated at point 14. If this deviation 4(actual-setpoint) is greater than a preset range about the setpoint value (distance), then the motor is moved continuously until the deviation Mactual-setpoint) is smaller than the distance.
At 16, it is checked whether the actual-setpoint deviation &(actualsetpoint) is smaller than a preset tolerance about the setpoint value. If so, the motor is stopped at 17. If. however. the deviation A(actualsetpoint) is greater than the tolerance, then, at 18, it is checked whether the preset pulse length t.
- 6 corresponds to the desired travel distance of the actuator 10. If this is not the case, a new pulse length t., corresponding to the desired travel distance is computed at 19. This loop is passed through until the pulse length t,, effects the defined adjustment travel of the actuator 10. As soon as this state has been reached, the motor is energized with the calculated pulse length t,,-at 20. If the deviation &actualsetpoint) is smaller than the tolerance (which is checked once again at program point 16), then the motor is stopped at 17.
It will of course be understood that the present invention has been described above purely by way of example, and modifications of detail can be made within the scope of the invention.
7 LIST OF REFERENCE CHARACTERS 6 7 8 9 10 11 12 1 Printing press 2 Printing unit 3 Feeder 4 Delivery 5 Computing/control apparatus Connecting lines Display Power section Motor Actuator Potentiometer A/D converter 8

Claims (1)

  1. CLAIMS:
    1. A printing press having apparatus f or the positioning of servo-drives on the printing press, with a servo-drive consisting of a motor, connected to an actuator, and of a potentiometer, said potentiometer determining the actual position of the actuator, and with a computing/control apparatus being provided, said computing/control apparatus adjustingly energizing the servomotors should the actual positions deviate from the preset setpoint positions, wherein with a preset range (distance) about the setpoint positions (setpoints), all actuators are moved by the same distance during one clock period tPer.
    2. A printing press according to claim 1, wherein the computing/ control apparatus varies the pulse length tp while the voltage remains constant.
    A printing press according to claim 1, wherein the computing/ control apparatus keeps the pulse length tp constant and varies the voltage.
    A printing press according to claim 1, 2 or 3, wherein the actuators are the ink keys on printing units of the printing press.
    5. A printing press according to claim 1, 2, 3 or 4, wherein the actuators are used to correct the plate cylinders in the circumferential and/or lateral direction.
    6. A printing press according to any one of claims 1-5, wherein the actuators are ink-duct rollers.
    7. A printing press according to any one of the preceding claims, wherein the computing/ control apparatus continuously energizes the motors should there be deviations A (actualsetpoint) of the actual positions (actual) from preset setpoint positions (setpoint), said deviations being outside of the preset range (distance).
    9 8. A printing press according to any one of the preceding claims, wherein the computing/control apparatus operates a warning apparatus should a maximum pulse duration tpmx for the adjustment of a defined distance be exceeded.
    9. A printing press substantially as hereinbefore described with reference to the accompanying drawings.
GB9320687A 1992-10-08 1993-10-07 A printing press having apparatus for the positioning of servo-drives on the press Expired - Fee Related GB2271444B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924233866 DE4233866A1 (en) 1992-10-08 1992-10-08 Device for positioning actuators on a printing press

Publications (3)

Publication Number Publication Date
GB9320687D0 GB9320687D0 (en) 1993-11-24
GB2271444A true GB2271444A (en) 1994-04-13
GB2271444B GB2271444B (en) 1996-03-13

Family

ID=6469942

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9320687A Expired - Fee Related GB2271444B (en) 1992-10-08 1993-10-07 A printing press having apparatus for the positioning of servo-drives on the press

Country Status (5)

Country Link
JP (1) JPH06198856A (en)
DE (1) DE4233866A1 (en)
FR (1) FR2696682B1 (en)
GB (1) GB2271444B (en)
HK (1) HK213996A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009059692A2 (en) * 2007-11-09 2009-05-14 Manroland Ag Positioning drive arrangement of a printing machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5804938A (en) * 1996-04-01 1998-09-08 Doorking, Inc. Gate operator with extensible actuating arm
DE19628410B4 (en) * 1996-07-15 2006-11-09 Heidelberger Druckmaschinen Ag Method for adjusting a passport on a printing machine

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1474166A (en) * 1973-07-13 1977-05-18 Harris Corp Controlling actuators for adjusting elements
CH600673A5 (en) * 1975-02-11 1978-06-30 Papst Motoren Kg Drive adjustable by increments
DE2710581A1 (en) * 1977-03-11 1978-09-14 Centra Buerkle Gmbh & Co Valve actuator stepping motor potentiometer circuit - has two additional wipers setting upper and lower limits of main tapping wiper
GB2032134B (en) * 1978-10-12 1982-12-01 British United Shoe Machinery Control of stroke of press
DD150027A1 (en) * 1980-04-10 1981-08-12 Max Janicki CONTROL DEVICE FOR ADJUSTMENTS ON PRINT AND BOOK BINDER MACHINES
DD160303A3 (en) * 1980-04-10 1983-06-01 Helmut Schuck DRIVE FOR A COLOR ZONE ADJUSTMENT ON PRINTING MACHINES
DE3112189A1 (en) * 1981-03-27 1982-10-14 Heidelberger Druckmaschinen Ag, 6900 Heidelberg PRINTING MACHINE WITH ACTUATORS
DE3201850C2 (en) * 1982-01-22 1984-05-17 Vereinigte Glaswerke Gmbh, 5100 Aachen Numerically controlled model cutting machine for glass panes and their application
DE3437954A1 (en) * 1984-10-17 1986-04-17 Olympia Werke Ag, 2940 Wilhelmshaven Method for driving a stepping motor
DE3704765A1 (en) * 1986-04-18 1987-10-22 Weinert E Messgeraetewerk Torque control for stepping motors
DE3708925C2 (en) * 1986-04-30 1995-08-31 Heidelberger Druckmasch Ag Device for controlling or regulating operations on a rotary offset sheet-fed printing press
DE3730625A1 (en) * 1987-09-11 1989-03-23 Wifag Maschf POSITIONING SYSTEM OF QUALITY GUIDE FUNCTIONS IN ROTARY PRINTING MACHINES
CH677211A5 (en) * 1988-05-31 1991-04-30 Bobst Sa

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009059692A2 (en) * 2007-11-09 2009-05-14 Manroland Ag Positioning drive arrangement of a printing machine
WO2009059692A3 (en) * 2007-11-09 2009-07-16 Manroland Ag Positioning drive arrangement of a printing machine

Also Published As

Publication number Publication date
GB2271444B (en) 1996-03-13
FR2696682B1 (en) 1996-06-28
FR2696682A1 (en) 1994-04-15
HK213996A (en) 1996-12-13
JPH06198856A (en) 1994-07-19
DE4233866A1 (en) 1994-04-14
GB9320687D0 (en) 1993-11-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20031007