EP0422365B1 - Courbes multiples d'encre et d'eau pour des presses - Google Patents

Courbes multiples d'encre et d'eau pour des presses Download PDF

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Publication number
EP0422365B1
EP0422365B1 EP19900116158 EP90116158A EP0422365B1 EP 0422365 B1 EP0422365 B1 EP 0422365B1 EP 19900116158 EP19900116158 EP 19900116158 EP 90116158 A EP90116158 A EP 90116158A EP 0422365 B1 EP0422365 B1 EP 0422365B1
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EP
European Patent Office
Prior art keywords
ink
rate curve
data
control system
data points
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.)
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EP19900116158
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German (de)
English (en)
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EP0422365A3 (en
EP0422365A2 (fr
Inventor
Allen L. Mitchell
Paul Fredricks
Thaddeus A. Niemiro
Jiing-Kang Lin
Frederick J. Whiting
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Goss International LLC
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Rockwell International Corp
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Publication of EP0422365A3 publication Critical patent/EP0422365A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0054—Devices for controlling dampening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices

Definitions

  • the present invention relates to offset printing presses and, particularly, to the electronic control of such presses.
  • Web offset printing presses have gained widespread acceptance by metropolitan daily as well as weekly newspapers. Such presses produce a quality black and white or color product at very high speeds. To maintain image quality, a number of printing functions must be controlled very precisely as the press is operating. These include the control of press speed, the control of color register, the control of ink flow and the control of dampening water.
  • the lithographic plate is mounted to a rotating plate cylinder.
  • the ink is injected onto an ink pickup roller and from there it is conveyed through a series of transfer rollers which spread the ink uniformly along their length and transfer the ink to the image areas of the rotating plate.
  • dampening water is applied to a fountain roller and is conveyed through one or more transfer rollers to the non-image areas of the rotating plate cylinder.
  • the plate cylinder rotates in contact with a blanket cylinder which transfers the ink image from the plate cylinder to the moving paper web.
  • the amount of ink and dampening water supplied to the plate cylinder is directly proportional to the press speed.
  • the plate cylinder and blanket cylinder transfer ink and water to the paper web at a higher rate, and the inking and dampening systems must, therefore, supply more ink and water.
  • this relationship is not linear and that the rate at which ink and dampening water is applied follows a complex rate curve which is unique to each press and may be unique to each run on a press.
  • the ink and water may be applied non-uniformly across the width of the ink pickup roller and the fountain roller in order to achieve uniform printing quality along the width of the web. If this is not done, there may be significant changes in the quality of the printed images across the width of the moving web.
  • Prior press control systems have provided limited control over the rate at which dampening water and ink has been applied as a function of press speed. For example, in the case of damping water, these systems pulse the nozzles on the spray bar on and off at one of a plurality of selectable pulse rates. The particular pulse rate selected is determined by the press speed. The particular pulse rates and selection points between pulse rates is preset to follow the dampening rate curve of the press as closely as possible. There is no means for easily changing these values or for providing a continuous range of pulse rates which closely follow the rate curve. In addition, while the amount of dampening water applied by the spray bar can be adjusted over the width thereof, this is a manual adjustment which may only be made locally at a spray bar controller. Thus, if inconsistencies in print quality are observed over the width of the image, manual adjustments to the circuitry must be made at a local control panel.
  • a non-linear control device for a humidifying mechanism drive of an offset printing press is disclosed.
  • the printing cylinder rotational speed is used as a command variable in an automatic control of the humidifying mechanism drive.
  • a non-linear relationship between the rotational speed of the printing cylinder and the drive to a humidifying ductor is set up on a plurality of wheatstone bridges connected in parallel. Thus, these wheatstone bridges are used to simulate the existing non-linear relationship.
  • a spray dampening control system is disclosed.
  • This spray dampening control system is used in planographic printing presses, including offset presses.
  • spray nozzle solenoids are operated with respect to both frequency and duty cycle considerations by an electrical system which has as its input the speed of the printing press operation and has as its output a predetermined frequency of pulses which are applied to the spray nozzle solenoids.
  • the frequency with which the spray nozzles are electrically pulsed increases non-linearly as the press speed increases.
  • means are provided for manually controlling the duty cycle with which each spray nozzle is electrically pulsed.
  • a dot graph display provides a visual indication of the dynamic state of the spray system, and a numeric readout provides an operator with a visual indication of the frequency with which the solenoid spray nozzles are operated.
  • the present invention relates to a control system for an offset printing press and, particularly, to the control of a dampening system and ink system on such a press.
  • the present invention includes a communications link with the press control system that enables parameters, such as dampening rate curve data and ink rate curve data to be downloaded and acted upon.
  • a control system of the present invention is for operating at least one set of nozzles on a spray bar and at least one set of plungers on an ink injection device for the printing press.
  • the control system has the following components: memory means for storing at least damp rate curve data and ink rate curve data which is utilized to control operation the nozzles and plungers, respectively; means for processing connected to the memory means, the means for processing providing a damp rate control signal as a function of the damp rate curve data and providing an ink rate control signal as a function of the ink rate curve data; first interface means for connecting the set of nozzles to the means for processing and being responsive to the damp rate control signal to control operation of the nozzles; second interface means for connecting the set of plungers to the means for processing and being responsive to the ink rate control signal to control operation of the plungers; means for communicating connected to at least said memory means and being operable in response to a received rate curve message to alter the damp rate curve data and the ink rate curve data stored in the memory means, each of the damp rate
  • the predetermined percentage is 20% (see FIG. 13).
  • the plurality of data points is ten data points and are connected together by straight line segments
  • the damp rate curve data has a damp rate curve (see FIG. 12) composed of a plurality of data points connected together by an interpolation of the data points, the data points indicating the amount of damping water required at a specific press speed.
  • the plurality of data points is ten data points and are connected together by straight line segments.
  • the memory means stores a plurality of different ink rate curve data and a plurality of different damp rate curve data as a function of paper type, ink type and damping solution used in the printing press.
  • the means for communicating is connected to a master work station and the master work station stores a plurality of different ink rate curve data and a plurality of different damp rate curve data as a function of paper type, ink type and damping solution used in the printing press.
  • a printing press is comprised of one or more printing units 10 which are controlled from a master work station 11.
  • Each printing unit is linked to the master work station by a unit controller 12 which communicates through a local area network 13.
  • the master work station 11 and the unit controllers 12 may send messages to each other through the network 13 to both control the operation of the press and to gather production information.
  • each printing unit 10 is comprised of four units which are referred to as levels A, B, C and D and which are designated herein as units 10A, 10B, 10C and 10D.
  • the units 10A-D are stacked one on top of the other and a web 15 passes upward through them for printing on one or both sides.
  • the printing units 10 are configured for full color printing on both sides of the web, where the separate units 10A-D print the respective colors blue, red, yellow and black.
  • each unit 10A-D includes two printing couples comprised of a blanket cylinder 20 and a plate cylinder 21.
  • the web 15 passes between the blanket cylinders 20 in each unit for printing on both sides.
  • Ink is applied to each plate cylinder 21 by a series of ink transfer rollers 22 which receive ink from an ink pickup roller 23.
  • the ink transfer rollers 22 insure that the ink is distributed uniformly along their length and is applied uniformly to the rotating plate cylinder 21.
  • An ink rail 400 applies ink to a distribution ink drum 402 which in turn transfers the ink to the ink pickup roller 23.
  • each plate cylinder 21 is supplied with dampening water by a pair of dampener transfer rollers 24 and a dampener rider roller 25.
  • a spray bar assembly 26 applies dampening water to each of the dampener rider rollers 25.
  • each spray bar assembly 26 receives a supply of pressurized water from a water supply tank 27 through a pump 28 and solenoid valve 29.
  • the spray bar assembly 26 includes eight nozzles 30 which each produce a flat, fan-shaped spray pattern of water when an associated solenoid valve 31 is energized.
  • all eight solenoid valves 31 are energized, a thin line of water is sprayed along the entire length of the associated dampener rider roller 25.
  • the solenoid valves 31 are pulsed on and off at a rate which is proportional to press speed so that the proper amount of dampening water is applied and transferred to the plate cylinder 21. It is also well known that means must be provided for separately adjusting the amount of water sprayed by each nozzle 30 to account for variations in the distribution of dampening water over the length of the plate cylinder 21.
  • the injector ink system delivers a controlled amount of ink to the distribution drum 402.
  • Each printing couple has four page packs 404.
  • the page pack 404 is the part of the injector ink system which provides ink to one age position.
  • Page pack gearboxes 406 are located along a drive shaft in the arch of the unit. Each gearbox 406 has a clutch arrangement to engage or silence each page pack 404.
  • the page pack 404 provides ink to one page which consists of eight columns. Each page pack 404 has eight variable stroke plungers 408 which pump a preset amount of ink to each page column. The stroke of each plunger 408 is set by the ink adjustment modules 410 which are located beneath the page pack 404.
  • the amount of ink fed to the ink train rollers is determined by:
  • the ink motor is controlled by the proportional ink circuit in the operator's console. This circuit will automatically vary ink motor speed with press speed.
  • each page pack 404 Located below each page pack 404 are a series of ink adjustment modules 410. There are 8 ink adjustment modules 410 to a page pack 404 for a total of 32 per printing couple.
  • the ink adjustment module 410 adjusts an ink column by adjusting the stroke of the page pack plunger 408 which increases or decreases the volume of ink fed to the ink rail 410.
  • Ink modules 410 are activated by the controls on a Unit Control Panel, or from the operator's console.
  • an ink control rod 414 moves against a spring loaded control lever 416.
  • the control lever 416 and plunger assembly 408 are connected to a common shaft.
  • the control rod 414 moves, it changes the position of the control lever 416 which changes the length of the pump stroke, thereby changing the ink volume being pumped to the ink rail 400.
  • a mechanical stop 418 contacts the control lever 416 as shown.
  • a bidirectional motor 420 connected to the ink control rod 414 is provided for establishing a "zero" position of the ink control rod which corresponds to a desired "black” printing quality.
  • the position of the bidirectional motor 420 is sensed by potentiometer 422 which outputs a signal which is stored in a memory either in the printing press or a master work station.
  • These stored values are "software zeroes" which are particular to a type of paper, a type of ink and a type of dumping solution used in the printing press. When one or all of these elements are changed in the printing press, the previously stored "software zeroes" for this combination is downloaded to reset the ink adjustment modules 410 to the correct zero setting.
  • the purpose of the ink rail 400 is to supply a predetermined amount of ink to the distribution ink drum 402.
  • the ink rail 400 is located in the aisle side of the unit and extends across the full width of the unit.
  • the rail is hinged so it can be pivoted for cleaning and maintenance.
  • Ink from the four page packs 404 is pumped through connecting hoses 412 to openings in the ink rail body. It then moves through the slots of the orifice plate which is located in the center of the ink rail 400.
  • the rail 400 is contoured and precisely located near the surface of the distribution ink drum 402.
  • each unit controller includes a communications processor 16 of the type disclosed in the above-cited U.S. Patent No. 4,667,323 which interfaces with the local area network 13.
  • the communications processor 16 provides six serial communications channels 17 through which it can receive input messages for transmission on the network 13. Messages which are received through the network 13 by the communications processor 16 are distributed to the appropriate serial channel 17.
  • the serial communications channels 17 employ a standard RS 422 protocol.
  • each drink processor 35 is coupled to sensing devices and operating devices on a respective one of the levels A-D of the printing unit 10.
  • each drink processor 35A-D produces output signals which control the solenoid valves 31 on the spray bars 26 and the page packs 404 for the ink rail 400.
  • the drink processors 35A-D also control color register.
  • each drink processor 35 is structured about a 23-bit address bus 40 and a 16-bit data bus 41 which are controlled by a 16-bit microprocessor 42.
  • the microprocessor 42 is a model 68000 sold commercially by Motorola, Inc. which is operated by a 10 mHz clock 43.
  • ROM read-only memory
  • the microprocessor 42 addresses elements of the drink processor 35 through the address bus 40 and exchanges data with the addressed element through the data bus 41.
  • the state of a read/write (R/W) control line 45 determines if data is read from the addressed element or is written to it.
  • the addressable elements are integrated circuits which occupy a considerable address space.
  • the chip enable circuit 46 is comprised of logic gates and three PAL16L8 programmable logic arrays sold commercially by Advanced Micro Devices, Inc. As is well known in the art, the chip enable circuit 46 is responsive to the address on the bus 40 and a control signal on a line 47 from the microprocessor 42 to produce a chip select signal for the addressed element. For example, the ROM 44 is enabled through a line 48 when a read cycle is executed in the address range $F00000 through $F7FFFF.
  • Table A The address space occupied by each of the addressable elements in the drink processor 35 is given in Table A.
  • a read/write random access memory (RAM) 50 stores the data structures which are employed to carry out these functions.
  • these data structures include elements which are collectively referred to herein as a switch database 51, a control database 52, receive message buffers 49, and send message buffers 66.
  • the switch database 51 indicates the status of various switches on the local control panels 53
  • the control database 52 stores data indicative of press speed, nozzle pulse rate, and nozzle pulse width and parameters for the ink injector system.
  • the RAM 50 is enabled for a read or write cycle with the microprocessor 42 through a control line 54.
  • the drink processor 35 is coupled to one of the serial channels 17 of the communications processor 16 by a dual universal asynchronous receiver/transmitter (DUART) 55.
  • the DUART 55 is commercially available as an integrated circuit model 68681 from Motorola, Inc. It operates to convert message data written to the DUART 55 by the microprocessor 42 into a serial bit stream which is applied to the serial channel 31 by a line drive circuit 56 that is compatible with the RS 422 standard. Similarly, the DUART 55 will receive a serial bit stream through a line receiver 57 and convert it to a message that may be read by the microprocessor 42.
  • the DUART 55 is driven by a 3.6864 mHz clock produced by a crystal 58 and is enabled for either a read or write cycle through control line 59.
  • the press speed feedback signal as well as signals from the local control panel 53 are input to the drink processor 35 through a programmable interface timer (PIT) 60.
  • the PIT 60 is commercially available in integrated circuit form as the model 68230 from Motorola, Inc. It provides two 8-bit parallel ports which can be configured as either inputs or outputs and a number of separate input and output points. In the preferred embodiment, one of the ports is used to input switch signals from the control panel 53 through lines 60, and the second port is used to output indicator light signals to the control panel 53 through lines 61.
  • the PIT 60 is enabled through control line 62 and its internal registers are selected by leads A0-A4 in the address bus 40.
  • the PIT 60 includes a programmable timer/counter. This timer may be started and stopped when written to by the microprocessor 42 and it is incremented at a rate of 312.5 kHz by an internal clock driven by the 10 mHz clock 43. When the timer is started, a logic high pulse is also produced at an output 63 to a speed interface circuit 64. When the interface circuit 64 subsequently produces a pulse on input line 65, as will be described in detail below, the timer stops incrementing and a flag bit is set in the PIT 60 which indicates the timer has stopped. This flag bit is periodically read and checked by the microprocessor 42, and when set, the microprocessor 42 reads the timer value from the PIT 60 and uses it to calculate current press speed.
  • the solenoid valves 31 on each spray bar assembly 26 are operated through a programmable interface controller (PIC) 70 or 72 and an associated solenoid interface circuit 71 or 73.
  • PICs 70 and 72 are commercially available integrated circuits sold by Motorola, Inc. as the model 68230. Each includes a pair of 8-bit output registers as well as a single bit output indicated at 75 and 76. Each output register can be separately addressed and an 8-bit byte of data can be written thereto by the microprocessor 42. The two 8-bit bytes of output data are applied to the respective solenoid interface circuits 71 and 73.
  • the solenoid valves 31 are turned on for a short time period each time a pulse is produced at the single bit output of the PICs 70 and 72. This output pulse is produced each time an internal timer expires, and the rate at which the timer expires can be set to a range of values by the microprocessor 42.
  • the time period which each solenoid valve 31 remains energized is determined by the operation of the solenoid interface circuits 71 and 73, which in turn can be separately configured by writing values to the registers in the PICs 70 and 72.
  • the rate at which the spray bars 26 are pulsed on is under control of the programs executed by the microprocessor 42, and the duration of the spray pulses from each nozzle 30 of the spray bars 26 can be separately controlled.
  • the ink injector system 424 having the page packs 404, the ink adjustment modules 410 and the ink rail 400 is connected via interface 426 to the address bus 40 and the data bus 41. Operation is substantially equivalent to operation of the spray bars 26.
  • the solenoid interface circuit 71 is shown in FIG. 6 and it should be understood that the interface circuits 73 and 426 are virtually identical. Each includes a set of eight 8-bit binary counters 80 and a set of eight R/S flip-flops 81 and 82.
  • the counters 80 are available in integrated circuit form as the 74LS592 from Texas Instruments, Inc. and they each include an internal 8-bit input register. This input register is loaded with an 8-bit binary number on output bus 83 when a pulse is applied to an RCK input of the counter 80.
  • the RCK inputs of the eight counters 80 are connected to respective ones of the output terminals PB0-PB7 of the PIC 70, and the eight leads in the output bus 83 are driven by the output terminals PA0-PA7 of the PIC 70 through a buffer 84.
  • any or all of the registers in the counters 80 can be loaded with a binary number on the PA output port of the PIC 70 by enabling the counter's RCK input with a "1" on the corresponding lead of the PB output port.
  • this circuitry is used to separately preset each 8-bit counter 80 so that the time interval which each of the solenoid valves 30 remains on can be separately controlled.
  • an output pulse is produced at the PC3 output pin of the PIC 70 each time an internal timer 85 expires.
  • the timer 85 is preset with a calculated current pulse rate value by the microprocessor 42.
  • two phase displaced pulses are produced by a set of four D-type flip-flops 86-89.
  • the Q output of flip-flop 87 sets the RS flip-flops 81 on the leading edge of one pulse and it presets four of the counters 80 with the values stored in their respective input registers. On the trailing edge of this first pulse, the Q output of the flip-flop 87 returns to a logic low which enables the same four counters to begin counting.
  • the remaining four counters 80 and the R/S flip-flops 82 are operated in the same manner by the Q and Q outputs of the flip-flop 89.
  • the only difference is that the operation of the flip-flop 89 is delayed one-half the time period between successive pulses from the flip-flop 87.
  • the eight counters 80 are incremented by 2 kHz clock pulses until they reach the all ones condition. At this point the output of the counter 80 goes to a logic low voltage and it resets the R/S flip-flop 81 or 82 to which it connects.
  • the output of each R/S flip-flop 81 or 82 control the operation of one of the solenoid valves 31 through power drivers 90 and 91 and, thus, each valve 31 is turned on when the flip-flops 81 and 82 are set, and they are each turned off as their associated counter 80 overflows and resets its R/S flip-flop.
  • the outputs of the drivers 90 are connected to the first, third, fifth and seventh nozzle solenoids and the outputs of the drivers 91 are connected to the second, fourth, sixth and eighth nozzle solenoids.
  • nozzles 1, 3, 5 and 7 are turned on each time a pulse is produced at PIC output terminal PC3 and nozzles 2, 4, 6 and 8 are turned on a short time interval later (i.e. greater than 5 milliseconds later).
  • Each nozzle 30 is then turned off separately as their corresponding counters 80 overflow.
  • the speed interface circuit 64 couples the digital incremented speed feedback signal received from the speed sensor 36 to the PIT 60.
  • the speed sensor 36 produces a logic high voltage pulse for each incremental movement of the web through the printing unit.
  • a magnetic sensor model 1-0001 available from Airpax Corporation is employed for this purpose, although any number of position feedback devices will suffice.
  • the speed sensor's signal is applied to a line receiver 95 which produces a clean logic level signal that is applied to the input of a 4-bit binary counter 96.
  • the counter 96 produces an output pulse each time sixteen feedback pulses are produced by the speed sensor 36.
  • This overflow is applied to the clock terminal of a D-type flip-flop 97 which switches to a logic state determined by the logic state applied to its D input.
  • the D input is in turn driven by a second flip-flop 98 which is controlled by the PCO output of the PIT 60 and the Q output of flip-flop 97.
  • the counter 96 again overflows to reset the flip-flop 97 and to thereby stop the timer 100 in the PIT 60.
  • Input PC1 also goes low, and when read next by the microprocessor 42, it signals that a complete sample has been acquired and can be read from the PIT 60. The entire cycle may then be repeated by again writing a "1" to the PCO output of the PIT 60.
  • the speed feedback circuit of the present invention offers a number of advantages.
  • the error caused by a noise voltage spike on the input lines is effectively reduced to about one sixteenth the error that would result if speed were measured by sensing the feedback pulse rate directly.
  • the microprocessor 42 is not burdened with a continuous monitoring of the speed feedback signal. Instead, when the system requires an updated sample of press speed, the microprocessor checks the PIT 60 and reads the latest value stored therein. It then initiates the taking of another sample and continues on with its many other tasks.
  • the data structures which are employed by the preferred embodiment of the present invention to control the spray bars 26 are stored in the RAM 50.
  • An equivalent data structure is provided for the ink injector system and only the data structure for the spray bars will be described in detail.
  • these data structures are collectively referred to as the switch database 51 and the control database 52.
  • the structure of these two databases 51 and 52 are illustrated in FIG. 8 for one printing couple. Similar data is stored in the databases 51 and 53 for the other printing couple in the unit 10.
  • the switch database 51 includes an image of the switch states on the local control panel 53 (FIG. 5).
  • the operator depresses a "FLOOD" switch when extra dampening water is to be applied during startup. As will be described below, when this occurs, the dampening water flow rate is increased 25% for a preset time interval.
  • a flood switch status word 120, a flood switch examine flag 121 and a flood timer value 122 are stored in the RAM 50.
  • Flood switch status 120 is updated every 100 milliseconds as will be described below to reflect the current state of the control panel switch.
  • the other two data structures are employed to recognize the flood request and implement the request for a preset time interval.
  • dampening water is also increased.
  • the status of this signal is stored at an autoflood switch status word 123, and as long as it is present, increased dampening water will be produced. And finally, the dampening system can be disabled by the operator and this event is stored at 124.
  • a number of other data structures are contained in the switch database 51, at least one of which pertains to the ink rate control system for the printing unit 10.
  • control status 125 indicates if the control is in the process of making a requested change ("change in progress") or if no changes have been requested ("idle").
  • Control status 125 also includes a "changes not complete counter” which indicates at any time the number of controllable nozzles which are undergoing changes.
  • a dampener mode word 126 indicates if the dampening system is in either manual or automatic mode. In the manual mode the dampening flow rate is set to a value indicated as unit trim 127, which can be manually altered from the master work station 11 or a local panel 53 (FIG. 1). In the automatic mode, the dampening water flow rate is calculated as a function of press speed in accordance with stored rate curve data 128 as will be described in more detail below.
  • a flood request flag 129 is set when the flood function is being performed and an update flag 130 is set when a significant change in press speed has occurred or new rate curve data 128 has been down loaded from the master work station 11.
  • the press speed is measured every 100 milliseconds and stored as the instantaneous press speed 131. If the instantaneous press speed 131 differs by more than ⁇ .5% from a processed press speed stored at 132, then the processed press speed 132 is updated with the newly measured value and the update flag 130 is set.
  • the processed press speed 132 is used in combination with the rate curve data 128 to calculate a new dampening water flow rate when the dampening system is in the "AUTO" mode.
  • This is converted to a pulse rate and is modified by a stored couple trim value 133 and increased further if the flood request flag 130 is set.
  • the resulting current pulse rate value is stored at 134 and is output to the timer 85 in the PIC 70 (FIG. 6).
  • the couple trim value 133 may be changed from the local control panel 53 to provide a means for manually adjusting the dampening water flow rate while in the AUTO mode.
  • a current % flow value stored at 137 is a number which may be read out and displayed. It expresses the current pulse rate value 134 as a percentage of the maximum pulse rate value and, hence, it indicates the percentage of maximum dampening water flow rate which is currently being applied.
  • the data block 135 stores information on each of the eight controllable nozzles 30 which will be described in more detail below with respect to FIG. 9C.
  • the rate curve data 128 is illustrated in detail in FIG. 9A. It may include one or more rate curve data blocks 140 that may be used with one or both printing couples. Each data block 140 includes a rate curve ID 141 which uniquely identifies it. Each printing couple is associated with a particular rate curve data block by this rate curve ID number. As illustrated in FIG. 9B, a configuration database stored in the RAM 50 includes configuration records 142 for each printing couple. These configuration records 142 include a rate curve ID number which link each printing couple to one of the stored rate curve data blocks 140. These configuration records 142 can be altered by messages from the master work station 11 and, hence, the rate curve data block 140 associated with a particular printing couple can be altered at any time.
  • Each rate curve data block 140 also stores a rate curve value 143 which indicates the current dampening water flow rate as calculated from the data in this rate curve data block 140 and the processed press speed 132.
  • a third entry in the block 140 is the number of rate curve points which are stored in this data block 140 and the remainder of the data block 140 is comprised of the data which defines each of these points.
  • Each point is defined by a press speed number 144 and a flow percent number 145. Anywhere from two to ten points may be stored which indicate the desired dampening water flow rates across a range of press speeds.
  • the rate curve value 143 is calculated by linearly interpolating between the flow percent numbers 145 for the points which have press speed numbers 144 to each side of the processed press speed 131.
  • An example of the curves for the control of the spray bars 26 is depicted in FIG. 12 and the curves for the control of the ink injector system is depicted in FIG. 13.
  • each printing couple may have up to eight separately controllable nozzles 30 on its spray bar 26.
  • the number is indicated in the configuration record 142 for each couple.
  • the nozzle data block 135 in the control database 52 stores data on each controllable nozzle 30. More specifically, the status 150 of each nozzle is stored (idle/change requested/change in process). Also, stored in this block 135 is the current pulse width value 151 which indicates the value actually being output to the PIC 70 or 72 (FIG. 5), the desired pulse width value 152 which indicates the pulse width which has been commanded, and the normalized pulse width value 153 which indicates the current value unmodified by any flood request or the like.
  • the nozzle data block 135 is employed to control each nozzle 30 and to implement a change in the pulse width produced by each nozzle 30 in response to messages received over the serial link 31 from the communications processor 30 (FIG. 4).
  • the programs which direct the operation of the microprocessor 42 and, hence, control the operation of the drink processor 35 are stored in the ROM 44. These programs include a set of programs which carry out specific tasks or processes as well as a real time clock interrupt service routine and an operating system program.
  • microprocessor 42 The development of software for the microprocessor 42 can be performed in numerous different ways by one skilled in the art.
  • the control of inking can be accomplished with a similar software program as that for controlling the spray bar assembly 26.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Claims (24)

  1. Système de commande pour faire fonctionner au moins un jeu d'ajutages sur un banc de pulvérisation et au moins un jeu de pistons sur un dispositif d'injection d'encre pour une presse d'imprimerie, comprenant:
    - des moyens de mémoire pour au moins emmagasiner des données de courbes de débit d'humidité et de courbes de débit d'encre, ces moyens étant utilisés pour commander le fonctionnement des ajutages et des pistons, respectivement;
    - des moyens de traitement reliés aux moyens de mémoire, ces moyens de traitement fournissant un signal de commande du débit d'humidité en fonction des données de la courbe de débit d'humidité et fournissant un signal de commande du débit d'encre en fonction des données de la courbe de débit d'encre;
    - des premiers moyens d'interface reliant le jeu d'ajutages aux moyens de traitement et étant sensibles au signal de commande du débit d'humidité pour commander le fonctionnement des ajutages;
    - des deuxièmes moyens d'interface reliant le jeu de pistons aux moyens de traitement et étant sensibles au signal de commande du débit d'encre pour commander le fonctionnement des pistons;
    - des moyens de communication reliés au moins auxdits moyens de mémoire et susceptibles d'opérer en réponse a un message reçu relatif à une courbe de débit pour modifier les données de la courbe de débit d'humidité et de la courbe de débit d'encre emmagasinées dans les moyens de mémoire.
  2. Système de commande conforme à la revendication 1, dans lequel les données relatives à chacune des courbes de débit d'humidité et de débit d'encre comprennent un ensemble de points, et dans lequel chaque point des données constituant les courbes de débit d'humidité et de débit d'encre indique la quantité de solution d'humidification et d'encre qui sont nécessaires à une vitesse déterminée de la presse.
  3. Système de commande conforme à la revendication 1, dans lequel lesdites données de courbe de débit d'encre comprennent une courbe primaire de débit d'encre composée d'un ensemble de points de données reliés entre eux par interpolation des points de données et une première et une deuxième courbe secondaire de débit d'encre qui sont obtenues en déplaçant la courbe primaire de débit d'encre d'un facteur positif et d'un facteur négatif, respectivement, lesdits facteurs positif et négatif étant un pourcentage prédéterminé d'un point maximum de données dudit ensemble de points de données de ladite courbe primaire de débit d'encre, les points indiquant la quantité d'encre nécessaire à une vitesse déterminée de la presse.
  4. Système de commande conforme à la revendication 3, dans lequel le pourcentage prédéterminé est de 20%.
  5. Système de commande conforme à la revendication 3, dans lequel l'ensemble de points de données comprend dix points de données qui sont reliés entre eux par des segments de ligne droite.
  6. Système de commande conforme à la revendication 1, dans lequel les données relatives à la courbe de débit d'humidité comprennent une courbe de débit d'humidité composée d'un ensemble de points de données reliés entre eux par interpolation des points de données, les points de données indiquant la quantité d'eau d'humidification nécessaire à une vitesse déterminée de la presse.
  7. Système de commande conforme à la revendication 6, dans lequel l'ensemble de points de données est composé de dix points de données qui sont reliés entre eux par des segments de droite.
  8. Système de commande conforme à la revendication 1, dans lequel les moyens de mémoire emmagasinent un ensemble de données de différentes courbes de débit d'encre et un ensemble de données de différentes courbes de débit d'humidité en fonction du type de papier, du type d'encre et de la solution d'humidification qui sont utilisés dans la presse d'imprimerie.
  9. Système de commande conforme à la revendication 1, dans lequel les moyens de communication sont reliés à un maître poste de travail qui emmagasine un ensemble de données de différentes courbes de débit d'encre, et un ensemble de données de différentes courbes de débit d'humidité, qui sont fonction chacune du type de papier, du type d'encre et de solution d'humidification utilisés dans la presse d'imprimerie.
  10. Système de commande conforme à la revendication 1, dans lequel les données relatives à la courbe de débit d'humidité et de débit d'encre comprennent une pluralité de points, chaque point desdites données indiquant respectivement la quantité de solution humidifiante et d'encre nécessaire à une vitesse de presse déterminée.
  11. Système de commande conforme à la revendication 10, dans lequel lesdites données de courbe de débit d'encre comprennent une courbe primaire de débit d'encre composée de points de données reliés entre eux par interpolation des points de données et des première et deuxième courbes secondaires de débit d'encre qui sont obtenues en déplaçant la courbe primaire de débit d'encre d'un facteur positif et d'un facteur négatif, respectivement, lesdits facteurs positif et négatif étant un pourcentage prédéterminé d'un point maximum de données dudit ensemble de points de données de ladite courbe primaire de débit d'encre, les points indiquant la quantité d'encre nécessaire à une vitesse déterminée de la presse.
  12. Système de commande conforme à la revendication 11, dans lequel le pourcentage prédéterminé est de 20%.
  13. Système de commande conforme à la revendication 12, dans lequel l'ensemble de points de données comprend dix points de données qui sont reliés entre eux par des segments de ligne droite.
  14. Système de commande conforme à la revendication 10, dans lequel les données de courbes de débit d'humidité comprennent une courbe de débit d'humidité composée d'un ensemble de points de données reliés entre eux par interpolation des points de données, les points de données indiquant la quantité d'eau d'humidification nécessaire à une vitesse déterminée de la presse.
  15. Système de commande conforme à la revendication 14, dans lequel l'ensemble de points de données est composé de dix points de données qui sont reliés entre eux par des segments de droite.
  16. Système de commande conforme à la revendication 10, dans lequel les moyens de mémoire emmagasinent un ensemble de données de différentes courbes de débit d'encre et un ensemble de données de différentes courbes de débit d'humidité en fonction du type de papier, du type d'encre et de solution d'humidification qui sont utilisés dans la presse d'imprimerie.
  17. Système de commande conforme à la revendication 10, dans lequel les moyens de communication sont reliés à un maître poste de travail qui emmagasine un ensemble de données de différentes courbes de débit d'encre, et un ensemble de données de différentes courbes de débit d'humidité, ces données étant fonction du type de papier, du type d'encre et de la solution d'humidification qui sont utilisés dans la presse d'imprimerie.
  18. Système de commande conforme à la revendication 1, dans lequel chacune des données relatives à la courbe de débit d'humidité et de débit d'encre comprend une pluralité de points, et dans lequel chaque point desdites données indiquant la quantité de solution humidifiante et d'encre nécessaire à une vitesse de presse déterminée, les données relatives à la courbe de débit d'encre ayant une courbe primaire de débit d'encre composée d'une pluralité de points de données reliés ensemble par interpolation desdits points de données et une première et deuxième courbe secondaire de débit d'encre qui sont décalées par rapport à ladite courbe primaire selon des facteurs positifs ou négatifs, lesdits fateurs positifs ou négatifs étant un pourcentage prédéterminé d'un point de donnée le plus grand de ladite pluralité de points de données de ladite courbe primaire, les points indiquant la quantité d'encre requise à une vitesse de presse déterminée.
  19. Système de commande conforme à la revendication 18, dans lequel le pourcentage prédéterminé est de 20%.
  20. Système de commande conforme à la revendication 18, dans lequel l'ensemble de points de données comprend dix points de données qui sont reliés entre eux par des segments de ligne droite.
  21. Système de commande conforme à la revendication 18, dans lequel les données relatives à la courbe de débit d'humidité comprennent une courbe de débit d'humidité composée d'un ensemble de points de données reliés entre eux par interpolation des points de données, les points de données indiquant la quantité d'eau d'humidification nécessaire à une vitesse déterminée de la presse.
  22. Système de commande conforme à la revendication 21, dans lequel l'ensemble de points de données est composé de dix points de données qui sont reliés entre eux par des segments de droite.
  23. Système de commande conforme à la revendication 18, dans lequel les moyens de mémoire emmagasinent un ensemble de données de différentes courbes de débit d'encre et un ensemble de données de différentes courbes de débit d'humidité en fonction du type de papier, du type d'encre et de la solution d'humidification qui sont utilisés dans la presse d'imprimerie.
  24. Système de commande conforme à la revendication 18, dans lequel les moyens de communication sont reliés à un maître poste de travail qui emmagasine un ensemble de données de différentes courbes de débit d'encre, et un ensemble de données de différentes courbes de débit d'humidité, chacune étant fonction du type de papier, du type d'encre et de la solution d'humidification utilisés dans la presse d'imprimerie.
EP19900116158 1989-09-29 1990-08-23 Courbes multiples d'encre et d'eau pour des presses Expired - Lifetime EP0422365B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41479489A 1989-09-29 1989-09-29
US414794 1989-09-29

Publications (3)

Publication Number Publication Date
EP0422365A2 EP0422365A2 (fr) 1991-04-17
EP0422365A3 EP0422365A3 (en) 1991-08-21
EP0422365B1 true EP0422365B1 (fr) 1994-12-07

Family

ID=23642993

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Application Number Title Priority Date Filing Date
EP19900116158 Expired - Lifetime EP0422365B1 (fr) 1989-09-29 1990-08-23 Courbes multiples d'encre et d'eau pour des presses

Country Status (5)

Country Link
EP (1) EP0422365B1 (fr)
JP (1) JPH03207654A (fr)
AU (1) AU633974B2 (fr)
CA (1) CA2024370C (fr)
DE (2) DE422365T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1094832C (zh) * 1997-10-22 2002-11-27 日本宝德温株式会社 润湿液供应方法和装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421437A1 (de) * 1994-06-21 1994-10-27 Koenig & Bauer Ag Rollenrotationsoffsetdruckmaschine mit Brückendruckeinheiten für Mehrfarbendruck
JP3428578B2 (ja) 2000-11-08 2003-07-22 株式会社東京機械製作所 インキポンプ制御装置
DE10232110B4 (de) * 2001-09-07 2015-06-03 Heidelberger Druckmaschinen Ag Verfahren zur Einstellung der Feuchtmittelzuführung einer Offset-Druckmaschine

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Publication number Priority date Publication date Assignee Title
GB1341201A (en) * 1970-05-15 1973-12-19 Baker Perkins Ltd Printing machine ink metering pumps
GB2024457B (en) * 1978-06-07 1983-01-06 Harris Corp Printing press ready and control system
DD157856A3 (de) * 1980-07-25 1982-12-15 Beyer Wolfgang Einstellbares nichtlineares korrekturglied fuer eine steuereinrichtung von antrieben an druckmaschinen
US4619198A (en) * 1984-12-24 1986-10-28 Moll Joseph P Method and apparatus for keyless offset printing
US4649818A (en) * 1985-07-22 1987-03-17 Ryco Graphic Manufacturing, Inc. Variable frequency pulsed spray dampening system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1094832C (zh) * 1997-10-22 2002-11-27 日本宝德温株式会社 润湿液供应方法和装置

Also Published As

Publication number Publication date
AU633974B2 (en) 1993-02-11
CA2024370C (fr) 1998-06-23
EP0422365A3 (en) 1991-08-21
EP0422365A2 (fr) 1991-04-17
DE69014812D1 (de) 1995-01-19
DE422365T1 (de) 1991-09-05
CA2024370A1 (fr) 1991-03-30
JPH03207654A (ja) 1991-09-10
AU6315690A (en) 1991-04-11
DE69014812T2 (de) 1995-05-18

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