EP0518234B1 - Procédé et méthode d'entraînement à commande électronique des rouleaux d'un encrier - Google Patents

Procédé et méthode d'entraînement à commande électronique des rouleaux d'un encrier Download PDF

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Publication number
EP0518234B1
EP0518234B1 EP92109548A EP92109548A EP0518234B1 EP 0518234 B1 EP0518234 B1 EP 0518234B1 EP 92109548 A EP92109548 A EP 92109548A EP 92109548 A EP92109548 A EP 92109548A EP 0518234 B1 EP0518234 B1 EP 0518234B1
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EP
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Prior art keywords
roller
ink
fountain roller
signal
angle
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EP92109548A
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German (de)
English (en)
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EP0518234A1 (fr
Inventor
Sung C. Lee
James N. Crum
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Manroland AG
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MAN Roland Druckmaschinen AG
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    • 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
    • B41F31/10—Applications of feed or duct rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/32—Means to vary the time of contact of one or more rollers in an ink train

Definitions

  • the present invention relates to an ink fountain roller drive device for controlling the ink application to a forme cylinder of a printing press with a box roller, an ink transfer roller, with a lifting roller and means for alternately adjusting the lifting roller to the ink transfer roller and the box roller during a predetermined downtime and control means around the box roller controlled to drive intermittently.
  • Printing presses and in particular offset web-fed printing presses used for lithography, typically use a steel color roll that rotates in an ink fountain.
  • a flexible or segmented doctor blade presses against this roller with an adjustable and controllable pressure, for example in different ink zones, in order to control the thickness of the ink film which the ink roller absorbs as it dips into the ink tank or the ink fountain.
  • Squeegee screws or similar devices allow control of the thickness of the ink film taken up by the ink roller to change it across the width of the printing press to be adapted for certain printing needs across the width of the substrate to be printed on .
  • the inking unit itself comprises a large number of rollers or cylinders, some of which are said to oscillate.
  • the ink is transferred from the inking roller to the inking unit by means of a lifting roller which moves back and forth between the inking roller and the first inking roller of the inking unit.
  • the lifter roller is moved by a mechanical drive which is driven by a wheel train of the printing press in order to alternately couple with the inking roller and the first inking roller of the inking unit.
  • the amount of ink transferred from the squeegee roller to the inking unit depends on the amount of angular displacement of the inking roller during the time the squeegee roller is in contact with the inking roller; but it also depends on the thickness of the ink, which is on the length of the axis of the ink roller on this and thus on the siphon roller.
  • the ink roller moves continuously; a variable speed drive is provided, the speed of this drive changing as a function of the operating speed of the printing press.
  • the speed ratio between the speed of the inking roller and the printing machine can be changed so that the amount of inking can be varied, the angle of rotation of the inking roller being changed while the lifting roller is in contact with the inking roller.
  • a generic inking unit is known in which the amount of ink transferred from the siphon roller to the ink transfer roller is controlled via the angular speed of the box roller and the contact time of the siphon roller with the box roller.
  • the ink is distributed from the first ink transfer roller to the forme cylinder of the printing press via an arrangement of ink distribution rollers.
  • the ink is applied to a blanket cylinder using the offset method in order to print on a printing material web, in particular paper.
  • the paper has the property of releasing fibers, dust and lint, such fibers, dust particles or lint can be transferred back towards the ink trough via the various ink distribution rollers and, under certain circumstances, can reach the ink fountain or ink trough via the intermittently rotating or oscillating siphon roller. Dust particles, lint or other contaminating substances can then accumulate inside the ink fountain, which can lead to changes in the amount of paint that is transferred over a long period of time.
  • a gear train which includes a gear with recesses on the circumference of the gears for intermittent operation and which even allows the box roller to rotate backwards is known from DE 37 16 679 C1
  • a gear train with a Maltese cross drive is known from DE-AS 11 88 616 known.
  • Known applicator rollers use the time during which the lifting roller is not currently in contact with the box roller, i.e. the time when the box roller stops; in this way the box roller is only driven during the time that it is engaged or in contact with the jack roller.
  • This intermittent motion has been found to prevent the accumulation of contaminating particles between the devices that control the thickness of the color film, i.e. the lifter rollers or lifter roller elements and the box roller.
  • the device used to ensure the intermittent movement of the rolls is complex and expensive, and causes maintenance difficulties.
  • the object is achieved in an ink fountain roller drive device of the type mentioned at the outset, as specified in claim 1.
  • the box roller is driven by an electric high-torque servomotor that is controlled by a control amplifier and a control device that receives input information via commands and print data that can be entered by an operator.
  • the control device controls the intermittent movement of the engine.
  • a sensor for example a transducer with a Hall element, is connected to the lifter roller to provide a signal about the position of the lifter roller which indicates the start of one revolution of the lifter roller, for example when the position of the lifter roller changes a toothing with the box roller.
  • the control unit has inputs which are connected to the control device, preferably an electrical control device, in order to receive a signal for the speed of the printing press, which signal represents the operating speed of the printing press.
  • a signal is supplied via a first input, which represents the duration of rotation of the lifting roller, which is dependent on the speed of the printing press.
  • a second input of the control unit is controlled by the operator with a signal which represents the desired angle of rotation of the box roller, during which the lifting roller is in mesh with the box roller.
  • the control unit has a third input, via which a signal about the position of the lifting roller is entered. This signal, amplified in a corresponding manner, represents an initial signal for the servomotor to start rotating the box roller.
  • the box roller is driven at such a speed that it rotates through an angle during the time of toothing with the lifting roller, which angle is selected and controlled by the operator.
  • the drive means has the advantage of allowing control of the amount of ink transferred by varying the tooth angle of rotation of the box roller during the time the jack roller is in contact with it, electronically changing the speed of the box roller.
  • a press operator can easily control the amount of ink transferred by changing a setting of a manually operated control device on the control panel, which then changes the speed of rotation of the box roller and, as a result, the angle through which the box roller rotates during the time it is in engagement with the lifting roller.
  • a modern high-speed rotary web press can rotate at a printing speed of, for example, 815 m / min or approximately 14 m / s.
  • the duration of the rotation of the lifting roller is 0.266 seconds.
  • the siphon roller is in contact with the box roller for half the rotation, that is to say for approximately 133 milliseconds.
  • the box roller must be accelerated from speed 0 to the speed required to reach the specified propulsion or rotation angle, as controlled by the operator.
  • This angle can be set between 0 and 90 ° by the press operator to meet printing requirements. It is usually given in the form of a percentage of the angle of rotation at which a rotation of the box roller by 90 ° corresponds to a coloring of 100%.
  • the box roller During the second half of a revolution of the lifting roller, the box roller must be slowed down to a speed of 0 again.
  • the course of speed as a function of time is not critical; however, the advance angle given by the operator is critical and must have been reached by the time the jack roller leaves the box roller.
  • the device has the additional advantage that it is not only possible to change the angle of rotation of the box roller during the toothing with the lifting roller on the basis of a command from the operator, but also, for example, the repetition sequences of the operation of the box roller.
  • By simply changing software or hardware it is easily possible, for example, to run the box roller continuously for a given number of jack roller revolutions and then to make one or more intermittent revolutions to remove dust if necessary to remove.
  • This operating mode reduces the heating of the servomotor as well as the amount of wear on the gearbox which is interposed between the servomotor and the box roller.
  • Fig. 1 shows a schematic representation of a web-fed rotary offset printing press.
  • the printing press is equipped for perfecting. Therefore, the printing devices that print on the front and the back of a printing material web W are functionally the same; the corresponding components are provided with the same reference letters, the designations for the lower printing unit each being additionally provided with a line.
  • Each printing unit has a form cylinder 10, which transfers ink to a blanket or offset cylinder 11.
  • a dampening liquid is provided, which from one with a Dampening fluid pickup roller P, a sliding roller S or its functional equivalent, a brush roller BR, equipped dampening unit is provided, which transfers the dampening fluid to a first transfer roller 12, which in turn rests on an application roller 13.
  • the inking unit has a box roller 20, which is arranged in a toothing which transmits ink within a color trough 18.
  • the thickness of the ink film is controlled by interlocking a doctor blade 19 with the circumference of the box roller 20.
  • the toothing depth of the doctor blade relative to the box roller 20 can be varied along the longitudinal axis of the box roller 20 in the manner of known systems for adjusting doctor blades, which is not shown here because these systems can be constructed in any suitable manner.
  • a siphon roller 21 transfers ink from the box roller 20 to an inking unit that includes a plurality of rollers or cylinders, some of which oscillate or vibrate axially.
  • the lifting roller 21 first transfers ink from the box roller 20 to a first ink transfer roller 22, which in turn is employed with its outer surface against a second ink transfer roller 23, to which it transfers ink. From there, the ink is transferred to a third ink transfer roller 24.
  • the ink film on the ink transfer roller 24 is then split and partially transferred to a first inking unit which comprises a vibrating roller 25, an ink transfer roller 26, a further vibrating roller 27 and an inking roller 28.
  • An ink transfer roller 29 can be placed against the inking roller 28.
  • a second inking unit part has a vibrating roller 30 and two inking rollers 31, 32. It can contain an additional clutch roller 33, which can be employed simultaneously on the application roller 13 and the ink application roller 32. A similar roller can, if necessary, also be arranged in the lower device.
  • the directions of rotation of the forme cylinder 10, the blanket cylinder 11, the box roller 20, the jack roller 21 and the first Ink transfer roller 22 are indicated by arrows in the drawing.
  • the lifter roller 21 oscillates back and forth between the toothing with the box roller 20 and the ink transfer roller 22, as indicated schematically by the double arrow A, as is also well known for ink rollers with a ductor. Any such means can be used, and since the means for intermeshing the siphon roller alternately intermittently in engagement with the ink roller 20 and the first ink transfer roller 22 is well known, it has been omitted from the drawing for the sake of simplicity.
  • an eccentric is used to control both the position and the downtime of the lifter roller 21 in meshing with the box roller 20, the box roller 20 itself or the first ink transfer roller 22.
  • the eccentric is connected via its rotation to the drive of the printing press and therefore rotates at a speed which depends on the printing press drive speed and is a function of it. Therefore, the length of time between the lifting roller 21 with the box roller 20 or the transfer roller 22 depends on the drive speed of the printing press.
  • the box roller 20 is driven at a speed which is independent of the speed of the printing press, but which has a defined relationship to it, since the angle by which the box roller 20 rotates during the time at which it is is in mesh with the jack roller 21, can be controlled by the operator.
  • the inking rollers in particular the ink transfer rollers 22, 23, 24 and the vibrating roller 25, are operated at the speed of the printing press.
  • the jack roller 21 is freely rotatable.
  • the lifter roller 21 is due to the friction of the ink on its surface as well as due to the color on the surface of the ink transfer roller 22 driven by the frictional force; and at the time of the end of the engagement, the lifter roller 21 has at least approximately reached the speed of the ink transfer roller 22.
  • the box roller 20 During the short period of time it takes to engage the box roller 20, it slows down due to the friction and adapts to the speed of the box roller 20.
  • the box roller 20 must be accelerated from standstill to the required speed to rotate through an angle entered by the operator of the printing press while it is in contact with the jack roller 21.
  • the initial acceleration of the box roller 20 due to the drive by the electric motor is supported by the transfer of rotational energy to the box roller 20 due to the rotation of the jack roller 21, the rotational energy to the jack roller 21 by the machine drive thereon was transferred while it was in use with the ink transfer roller 22.
  • the box roller 20 is driven by a servomotor 40 via a reduction gear 41.
  • the shaft of the servomotor 40 is connected to an encoder or coordinate converter 42 which creates a pulse-shaped output signal which represents the instantaneous speed of the box roller 20.
  • This signal is integrated in a control circuit 45 so as to obtain a measure of the advance angle of the box roller 20.
  • the pressure control device is an electronic control device which either forms part of a control unit 45 or forms it as a whole.
  • the control unit 45 has its own internal clock.
  • the control unit 45 receives three input signals which determine or control its mode of operation.
  • a The first input signal is the signal which represents the time during which the lifting roller 21 is in contact with the box roller 20, that is to say during one half of the rotation period T of the lifting roller 21. This signal is the T / 2 signal. Since the traversing mechanism of the lifting roller 21 is connected to the printing press, this signal also represents the printing speed of the printing press.
  • the control unit 45 receives a second input signal which represents the angle ⁇ s , which is the angle of rotation by which the box roller 20 must rotate during the time T / 2 according to the input of the operator of the printing press.
  • a signal of 100% for the angle ⁇ s controls a movement of the box roller 20 over an angle of 90 °. If the operator of the printing press determines that this would supply an excessive amount of ink, the amount can be reduced by setting the angle to a lower value, for example only 85 ° during the time T / 2.
  • the control unit 45 receives a third signal which is a signal for the position of the lifting roller 21 and which is derived from the traversing mechanism which controls the position of the lifting roller 21 with a pulse, for example, when the amount of rotation of the lifting roller 21 starts during which time is in use with the box roller 20.
  • This signal for the lifting roller position can be used as a start signal for the control unit 45 in order to calculate an output signal which is to be applied by the control unit 45 to the output connection J1 in order to establish an electrical connection with a control amplifier 43 which controls the servomotor 40 controls and is supplied with energy.
  • the signal from the encoder or coordinate converter 42 which represents the speed of the box roller 20, is fed into the control unit 45 via a feedback loop 48.
  • the printing machine device (Fig. 1) is controlled by a programmable controller, as is well known, which allows the operator of the printing press to control various functions of the printing press and theirs Monitor operation.
  • the operator determines the printing speed and also the percentage of the maximum ink transfer from the box roller 20 to the lifting roller 21. From the printing speed, the actual downtime T / 2 of the lifting roller 21 on the box roller 20 can be easily determined and calculated.
  • the electronic control device that controls the movement of the box roller 20 requires the following input signals: the standstill time T / 2 of the lifting roller 21 on the box roller 20, which in turn is inversely proportional to the printing speed, and the desired advance angle ⁇ s of the box roller 20 as provided by the operator.
  • These signals which are generated by the operator's command units 46 and 47 (Fig. 3) for the print speed and idle angle, or in other words, the advance angle of the box roller 20, are converted by the programmable controller 45 into binary 12-bit signals.
  • a sensor 44 for determining the position of the lifting roller 21 is, for example, a Hall element; it monitors the position of the lifting roller 21 or a component moving it, for example the eccentric, and supplies a signal which represents the start of the rotation of the lifting roller 21.
  • the encoder or coordinate converter 42 which generates a speed feedback signal for the speed of the box roller 20, also generates a signal for the control unit 45. This signal is integrated and provides a measurement of the actual advance angle ⁇ of the box roller 20, as determined by the servomotor 40 is rotated via the reduction gear 41.
  • speed relationship refers to a signal which, before being amplified, is applied to the actuator 40 to control it. It could also be referred to as the input speed for the servomotor 40, which would then still have to be modified by an error signal which is fed back from the encoder or coordinate converter 42 to the control amplifier 43 via the feedback loop 48.
  • the actuator 40 and the gear 41 are commercially available items that have high acceleration and low moments of inertia.
  • the lifting roller 21 is braked in an average of 60 ms.
  • Their braking torque points in the direction of the alternatively possible acceleration by the box roller 20.
  • a connection can be assembled from the servomotor 40 and the reduction gear 41, which brings the box roller 20 to the required speed within 60 ms. This makes the best use of the kinetic energy of the lifting roller 21, which just rotates after use with the ink transfer roller 22.
  • the ink and the doctor blade 19, which is attached to the box roller 20 can exert a viscosity torque of up to 160 kgm thereon.
  • the gear reduction is selected so that the mass inertia is matched to that of the motor as far as possible and the best possible energy transmission from the servomotor 40 is made possible.
  • Actuator 40 should be a high torque, low inertia motor. Brushless DC motors are preferred because of their long life.
  • the peak torque that acts on actuator 40 during acceleration and deceleration can only be estimated. Many factors, such as the particular color being used, the temperature, settings made by the operator of the printing press, and the like, can influence the torque and thus the acceleration time, which are caused by the combination of the servomotor 40, the reduction gear 41 and the box roller 20 can be achieved.
  • the device shown in Fig. 2 represents a suitable arrangement of a combination of an engine with a transmission and a control unit.
  • the control unit 45 and its command inputs are explained in more detail in FIG. 3.
  • the printing speed and the advance angle of the box roller 20 are input via input components 46 and 47, respectively, and these are connected to the programmable control unit 45.
  • the control unit 45 generates 12-bit signals.
  • a 12-bit signal which stands for the advance angle ⁇ s , is input into a first computer 50, for example a 12-bit computer, in order to set it to a value from which it counts down.
  • the 12-bit counter 50 counts down while being controlled by signals generated by the encoder or coordinate converter 42.
  • the start of counting is controlled by the application of a start signal by a sensor 44 which reflects the position of the lifting roller 21.
  • a 12-bit digital-to-analog converter 52 the counting state is converted into an analog value, for example an analog voltage.
  • Proportionality factor k is supplied to the digital-to-analog converter 52, for example, as is known per se, in that a fixed voltage is applied to it by a voltage divider 55.
  • the start signal coming from the sensor 44 starts a counting process in a 12-bit counter 51.
  • the 12-bit counter 51 counts with a clock frequency of 1 kHz. It is preset to receive the 12-bit signal over the period T / 2, which represents the period during which the lifting roller 21 is in contact with the box roller 20.
  • the output of the 12-bit counter 51 is connected to a digital-to-analog converter 53, which in turn is coupled to the feedback loop of an operational amplifier 54, which receives an input signal from the output of the digital-to-analog converter 52.
  • the output of the operational amplifier 54 is connected to the connection J1, so that a speed reference signal is generated for the control amplifier 53 and thus for the servomotor 40.
  • the 12-bit counters 50, 51 will have the values of the presetting angle ⁇ s and the duration T / 2 in accordance with those of the control devices 46 , 47 derived values are preset.
  • an electronic switch 56 connects the output of the operational amplifier 54 to the reference input of the control amplifier 43.
  • the output signal is a reference signal in the form of a step function, which is equivalent to the required speed, provided that the control amplifier 43 immediately generates an output signal therefrom.
  • the 12-bit counter 50 counts down and at all times has a count value that is equivalent to the remaining angle that is to be driven (see counter of the formula).
  • the 1 kHz clock signal causes the 12-bit counter 51 to count down so that it has a count that corresponds to the number of milliseconds remaining during half the revolution of the lifting roller 41 (cf. denominator of the formula).
  • These count values are converted into electrical signal values or parameters by the digital-to-analog converters 52, 53 and in the forward direction or via a feedback loop Operational amplifier 54 supplied.
  • the operational amplifier 54 determines the division function, and the output of the operational amplifier 54, after it has been calibrated by means of the proportionality factor k, corresponds to the speed value that is necessary by the angle ⁇ s at the time of the end of half the rotation period T / 2 Preset jack roller 21.
  • the response speed of the control amplifier 43 is fast enough to reach the final speed within the time period T / 2.
  • the control ensures that the advance angle ⁇ s is reached within the time period T / 2.
  • the circuit can be built entirely from integrated components. Preferably two channels are applied together on a printed circuit board and each channel is connected to one of the inking rollers.
  • the box roller 20 In some operating modes, it is not necessary to always operate the box roller 20 intermittently.
  • the intermittent operation described above causes stress on the servomotor 40 and also on the reduction gear 41.
  • Fig. 4 shows a way to control the device.
  • a down counter 60 receives clock signals, for example clock signals a repetition frequency of 1 kHz, signals about the position of the jack roller 21 from the sensor 44 and a signal from a switch 61 representing the number of revolutions of the jack roller 21 while the box roller 20 is continuously rotating before an intermittent revolution has started.
  • the output signal of the control unit 45 is divided between the terminals J1 and J2.
  • a switch 57 is provided on the link which is controlled by the down counter 60.
  • connection J2 can then either be switched with the connection J1 or it is supplied with an input signal which represents the printing speed, for example an input signal which represents the standstill time T / 2 of the lifting roller 21, modified by the percentage of the standstill angle, so that the speed of the box roller is constantly maintained at the same level during the input of counts to switch 61.
  • the switch 61 controlled by the counter 60, switches to a position in which the terminals J1 and J2 are connected to one another so that they make an intermittent revolution, so initiate as described above.
  • the number of intermittent revolutions can also be determined directly via the switch 61.
  • the start signal which is applied to the counter 60 generates count signals for the revolution, which must be counted separately after continuous and intermittent revolutions.
  • the intermittent mode of operation within programmable controller 45 may be controlled by software, for example, by preventing switch 56 from switching back to 0, but instead starting another counting cycle by sending a simulated start signal to the 12-bit - Counters 50 and 51 delivers.

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

Claims (9)

  1. Dispositif d'entraînement de rouleaux d'encrier par la commande d'un transfert d'encre sur un cylindre de plaque (11) d'une presse d'imprimerie avec un rouleau d'encrier (20), d'un rouleau de transfert d'encre (22), avec un rouleau de prise d'encre et des moyens pour placer alternativement le rouleau de prise d'encre (21) sur le rouleau de transfert d'encre (22) et le rouleau d'encrier (20) pendant une durée d'arrêt fixée (T/2) et des moyens de commande, pour actionner de manière intermittente le rouleau d'encrier (20) commandé au moyen d'un servomoteur (40), qui est relié de manière en rotation avec le rouleau d'encrier (20), caractérisé en ce qu'il présente un détecteur (44), qui explore une jonction au rouleau de prise d'encre (21) et produit un signal, qui fournit la position du rouleau de prise d'encre (21) pendant un instant de référence en référence au rouleau d'encrier (20) et au rouleau de transfert d'encre (22), et une unité de commande (45) pour commander le déplacement intermittent du servomoteur (40), cette unité de commande (45) a une première entrée pour un signal représentant la durée d'arrêt (T/2), une deuxième entrée (47) pour un angle d'arrêt, qui est représentatif de l'angle d'orientation du rouleau d'encrier (20) pouvant être commandé par l'opérateur, pendant que le rouleau de prise d'encre (21) est placé sur lui, et une troisième entrée pour la réception d'un signal sur la position d'un rouleau de prise d'encre (21), l'unité de commande (45) met à disposition sur une sortie (31) un signal de commande pour la commande de la rotation du servomoteur (40), pour actionner le rouleau d'encrier (20), de sorte qu'il tourne d'un angle, qui est fixé par l'angle d'arrêt pendant la durée d'arrêt (T/2) de la position d'arrêt du rouleau de prise d'encre (21) au rouleau d'encrier (20).
  2. Dispositif d'entraînement de rouleaux d'encrier selon la revendication 1, caractérisé en ce que la durée d'arrêt prédéterminée (T/2) est une fonction de la vitesse d'impression de la presse d'imprimerie.
  3. Dispositif d'entraînement de rouleaux d'encrier selon la revendication 1, caractérisé en ce que l'unité de commande (45) comprend un moyen de calcul, pour, pendant la mise en contact du rouleau de prise d'encre (21) sur le rouleau d'encrier (20), calculer continuellement la vitesse de référence = k . φ s - φ T/2 - t
    Figure imgb0004
        φs - φ indiquant l'angle de rotation restant du rouleau d'encrier (20), duquel il peut tourner,
       T/2 - t indiquant la durée d'arrêt restante du rouleau de prise d'encre (21) sur le rouleau d'encrier (20)
       et, k étant la constante de proportionnalité.
  4. Dispositif d'entraînement de rouleaux d'encrier selon la revendication 3, caractérisé en ce que le moyen de calcul comprend un amplificateur opérationnel (54), dans lequel le signal sur l'angle d'arrêt est introduit et qui présente une ligne de retour de sa sortie sur son entrée, laquelle comprend un moyen pour introduire la durée d'arrêt (T/2 - t) dans l'amplificateur opérationnel (54).
  5. Dispositif d'entraînement de rouleaux d'encrier selon la revendication 3, caractérisé en ce que le moyen de calcul présente une liaison (J1), sur laquelle une vitesse de référence est à disposition, qui est reliée à un servomoteur (40), pour le commander en continu pendant la rotation du rouleau de prise d'encre (21), et qui tourne avec une vitesse, de sorte que le rouleau d'encrier (20) tourne d'un angle de position d'arrêt ( φs ) choisi, qui est alloué par le signal d'angle d'arrêt.
  6. Dispositif d'entraînement de rouleaux d'encrier selon la revendication 3, caractérisé en ce que, le moyen est présent, pour commander le servomoteur (40) de sorte qu'il s'arrête à la fin de la rotation du rouleau de prise d'encre (21).
  7. Dispositif d'entraînement de rouleaux d'encrier selon la revendication 4, caractérisé en ce que le moyen de calcul contient des compteurs, qui reçoivent respectivement un signal, qui représente la durée d'arrêt (T/2) et l'angle d'arrêt ( φs ), en ce qu'une horloge échantillonne les compteurs avec une fréquence d'échantillonnage prédéterminée et en ce que des moyens (52, 53) sont présents pour commander l'introduction des signaux des compteurs dans la boucle de retour de l'amplificateur opérationnel (54).
  8. Dispositif d'entraînement de rouleaux d'encrier selon la revendication 1, caractérisé en ce qu'il contient un décompteur ou décrémenteur (60), qui est relié au rouleau de prise d'encre (21) et qui compte les signaux de position de celui-ci et qui, lorsque les signaux de position ont atteint un état de comptage prédéterminé, commande l'unité de commande (45), de sorte qu'elle mette à disposition sur la liaison (J1) un signal de commande du servomoteur (40).
  9. Dispositif d'entraînement de rouleaux d'encrier selon la revendication 8, caractérisé en ce qu'il comprend des moyens (T/2; φs ), qui facilitent le déplacement continu du servomoteur (40), jusqu'à ce que l'unité de commande l'arrête.
EP92109548A 1991-06-13 1992-06-05 Procédé et méthode d'entraînement à commande électronique des rouleaux d'un encrier Expired - Lifetime EP0518234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US714916 1991-06-13
US07/714,916 US5090315A (en) 1991-06-13 1991-06-13 Electronically controllable ink fountain roll drive system, and method

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EP0518234A1 EP0518234A1 (fr) 1992-12-16
EP0518234B1 true EP0518234B1 (fr) 1996-03-27

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US (1) US5090315A (fr)
EP (1) EP0518234B1 (fr)
JP (1) JPH05169635A (fr)
DE (1) DE59205815D1 (fr)

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DE4314426C2 (de) * 1993-05-03 1996-06-13 Roland Man Druckmasch Heberfarbwerk für eine Druckmaschine
EP0623468B1 (fr) * 1993-05-03 1997-03-19 MAN Roland Druckmaschinen AG Dispositif d'encrage à rouleau preneur et procédé pour régler l'alimentation en encre dans des machines d'impression
DE4411109C1 (de) * 1994-03-30 1995-09-14 Roland Man Druckmasch Verfahren zur Farbmengeneinstellung bei Heberfarbwerken von Druckmaschinen, insbesondere Bogenoffsetdruckmaschinen, sowie entsprechend ausgebildetes Heberfarbwerk
GB9426166D0 (en) * 1994-12-23 1995-02-22 Langston Corp Printing apparatus
DE19753944C2 (de) * 1997-12-05 2002-06-06 Roland Man Druckmasch Verfahren zum Steuern eines Heberfarbwerkes einer Druckmaschine
DE19815293A1 (de) * 1998-04-06 1999-10-07 Heidelberger Druckmasch Ag Druckmaschine und Verfahren zum Betrieb einer Druckmaschine
DE29809948U1 (de) * 1998-06-04 1998-08-06 MAN Roland Druckmaschinen AG, 63075 Offenbach Steuerung für ein Heberfarbwerk
DE10056248A1 (de) * 1999-12-06 2001-06-07 Heidelberger Druckmasch Ag Verfahren zum Steuern der Farbmenge in einem Farbwerk
GB2398272B (en) * 2003-02-17 2006-03-22 Goss Graphic Systems Ltd Inking unit
CN100343049C (zh) * 2004-04-17 2007-10-17 汕头市东源轻工机械厂有限公司 胶印机传墨摆辊的摆动控制装置
PL1782951T3 (pl) * 2005-11-03 2008-05-30 Ball Europe Gmbh Trzpień naprężający stosowany w druku cyfrowym
US20070169647A1 (en) * 2006-01-13 2007-07-26 Conrad Earl P Servomechanical inker for a container decorator

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DE1188616B (de) * 1958-11-28 1965-03-11 Carl Allers Etablissement As Einrichtung an einer Druckmaschine zum Antrieb der Farbkastenwalze
US3688696A (en) * 1970-05-08 1972-09-05 Harris Intertype Corp Motorized ductor roll
US4157682A (en) * 1977-08-01 1979-06-12 Am International, Inc. Ink and moisture control system with run-length compensation
DE2945894C2 (de) * 1979-11-14 1982-08-19 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbkastenwalzenantriebseinrichtung eines Farbwerkes für Druckmaschinen
DE3331208A1 (de) * 1983-08-30 1985-03-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Verfahren zum einstellen des farbwerks einer druckmaschine und messvorrichtung zu seiner durchfuehrung
GB2193926A (en) * 1986-07-24 1988-02-24 Ratby Eng Co Ltd Inking system in a printing machine
DD262194A1 (de) * 1987-07-01 1988-11-23 Polygraph Leipzig Verfahren und schaltungsanordnung zur farbdosierung
DD262195A1 (de) * 1987-07-01 1988-11-23 Polygraph Leipzig Verfahren und schaltungsanordnung zum dosieren von farbe
DE3835221C2 (de) * 1988-10-15 1994-04-21 Heidelberger Druckmasch Ag Verfahren zur Bestimmung des Verbrauchs von Druckfarbe in einer Offsetdruckmaschine

Also Published As

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US5090315A (en) 1992-02-25
EP0518234A1 (fr) 1992-12-16
DE59205815D1 (de) 1996-05-02
JPH05169635A (ja) 1993-07-09

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