EP0080667A1 - Means and method for adjusting a plurality of actuators in a printing press - Google Patents

Abstract

A device and a method for controlling a printing machine, in particular an offset printing machine (1) with a plurality of servomotors (9) for adjusting actuators (15-21) for the ink film thickness profile and / or wet film thickness profile, which are operated by means of an automatic control of the setting device Entered setpoints are adjustable, characterized in that a light stylus (33) is provided for entering the setpoints, which interacts with a display field (31). This allows target values to be entered quickly and easily.

Description

The invention relates to a device and a method for controlling a printing press, in particular for controlling a plurality of servomotors for adjusting actuators for the ink film thickness profile and / or wet film thickness profile and / or for register adjustment of an offset printing machine.

It is known from the applicant's control station CPC to display the actual values of the positions of the actuators, which are actuating cylinders, on a display panel by means of light-emitting diodes. The actuators for the individual actuating cylinders can be switched on by the printer using pushbuttons, so that the printer can specifically change the position of the actuators. An arrangement has also already been proposed in which set values for the position of the actuators can be entered in the setting device and then the actuators are automatically adjusted until they reach the set position. The target values can be entered manually, for example using potentiometers. These target values are entered in order, for example, to preset the actuators of the printing press at the start of a print job, the information about the individual target values being able to come, for example, from an earlier same print job; however, the target values can also be entered by the printer during printing in order to counteract color deviations in the printed product, which could occur, for example, as a result of temperature changes in the environment.

The invention has for its object to provide a device and a method of the type described above for controlling a printing press, in which the printer can enter data and / or control commands or their changes very easily and quickly into the printing press.

According to the invention, this object is achieved in that a light pen is provided for entering data and / or commands or their changes, which interacts with a control panel.

In terms of the method, the solution to this problem is that data and / or commands or their changes are entered into the printing press by means of a light pen, for which purpose the light pen can be placed selectively on a control panel or can be moved in the longitudinal direction thereof, and the data or. Command transmission takes place by means of optical and / or optoelectronic elements corresponding to the light pen in the control panel and that the data and / or commands entered or their changes can be used to adjust the servomotors and / or command execution.

The control panel is preferably used at the same time to display information that is related to the information to be entered, in particular it is advantageous if the control panel displays at least the actual values of the actuators. The part of the control panel used for this display is referred to below as the display panel. It is possible that the entire control panel is the display panel at the same time;

The advantage of the invention lies in the simple and quick input of data and / or control commands. For example, if the printer wants to enter new or changed setpoints for individual actuators or for all actuators, he only has to operate the light pen on the display panel fahreri, but not for each of the actuators a rotary knob or a button or the like. The movement of the light pen over the display field generally takes the form of a more or less wavy curve, and this movement is very easy for the printer to carry out. It is therefore not necessary for the printer to place the light pen on certain points on the display panel, then remove it from the display panel and put it on a new point. It goes without saying that the setting process can also be carried out by placing the light pen at certain points on the display panel. With regard to the maximum speed at which the printer can move the light pen across the display field, reference is made to the later explanations.

Although the invention is mainly explained in connection with the input of setpoints for the adjustment of the actuators for the ink layer thickness profile, the invention also includes the input of other data, for example for the adjustment of the registers of a printing press, whereby the register-accurate printing of different colors can be adjusted and the input of control commands using the light pen, although in the later embodiment the control commands are input using pushbuttons.

In embodiments of the invention, the light pen can have a light source which interacts with light-sensitive elements arranged in the display panel. Light-emitting diodes can then be provided in the display field for the displays to be displayed by the display field. The light-sensitive elements arranged spatially in the display field must be sufficiently decoupled from the light-emitting diodes.

Another embodiment of the invention provides that the light stylus has a receiver which interacts with light-emitting elements arranged in the display panel. In one embodiment of the invention, these light-emitting elements can be the screen of a television picture tube or another cathode-ray tube. In another embodiment of the invention, the light-sensitive or light-emitting elements are arranged in the form of a matrix of diodes (photodiodes or light-emitting diodes) in which each actuator is assigned a row of diodes and in which the rows are arranged next to one another transversely to their own longitudinal direction . This arrangement had already been mentioned above for the case of light-emitting diodes. Each row of diodes, which in the exemplary embodiment is arranged as a vertical column, is assigned to a specific actuator and contains a predetermined number of diodes, for example 16 diodes. In the case of a matrix of photodiodes, it is assumed that a light-emitting diode which is only used for display purposes is arranged close to each photodiode. The individual columns of diodes are arranged at suitable intervals next to one another in the display panel, so that the position of all actuators can be recognized from the lighting up of the diodes used for display in the display panel.

In embodiments of the invention, the light pen is a device that allows to recognize light contrasts and therefore z. B. can cooperate with a display panel containing liquid crystal elements.

As a generally usable operating mode, it is provided that the printer must enter the light pen to enter the desired position of the row of diodes assigned to the relevant actuator (or, more generally, to the corresponding position on the display panel) in order to enter each individual target value. The printer can move the light pen from left to right or right to left over the entire display field, cover only part of the length of the display field, or only place the light pen on one or a few desired locations.

In certain cases, however, another operating mode can be advantageous, which can be switched according to an embodiment of the invention, and in which a single target value entered at any point on the display field for one of the actuators is used as target value for a subsequent one predetermined group of actuators is used. According to one embodiment of the invention, the predetermined group of actuators can include all those actuators that are located in the representation of the matrix or the display field on a predetermined side, for example the right side of that row of elements into which the light stylus should have a target Value was entered. In this development just described, the printer must therefore, for example, if he wants to enter the same setpoint for all actuators, only enter this setpoint at the leftmost position on the display panel, because this setpoint automatically continues for everyone in the display panel Actuators on the right is adopted. With the same operating mode, the printer can also move the light pen from left to right across the display panel and then end up entering the same target values as if it had switched on the above-mentioned operating mode. In the example of this second mode of operation cited, however, the printer cannot enter different target values by moving the light pen from right to left across the display field. This described embodiment of the invention is particularly suitable for the rapid input of a step-like profile of the ink layer thickness profile or wet layer thickness profile; this operating mode is therefore briefly referred to below as "step profile", while the first-mentioned operating mode is referred to as "profile".

The predetermined group of actuators, which is set to the same target value as that which was directly controlled by the printer by means of the light pen, can also be selected differently, for example two or three respectively to the right and left of the directly actuated actuator Actuators belong to this group, or all to the left of the actuated actuator, or all. Some or all of these different possibilities can advantageously be switched on by the printer.

If a cathode ray tube or a television screen is provided as the display field, then the interaction with a light-sensitive light pen in the manner known from computers can follow in that the screen is written line by line by the cathode ray, at those points where there is a separate pictorial representation should not take place, the cathode ray only produces a very low screen brightness, which is sufficient, however, to have the light receiver respond in the light pen. From the point in time at which the light pen receives light, it is determined in a manner known per se at which point on the screen the light pen is placed and the desired information is then entered into the corresponding point in a memory. Information to be displayed on the screen can be generated by a larger current of the electron beam, as is known and customary in television technology.

In contrast, in one embodiment of the invention, in which the display field contains a matrix of light-emitting diodes which, in addition to their cooperation with the light pen, are also to be used for display purposes, it is provided that the light-emitting diodes are acted upon by current pulses in a predetermined sequence, such that those light-emitting diodes Those that do not produce a display are subjected to such a short current pulse that they appear to the human eye to be non-luminous or only weakly luminous, whereas those LEDs that produce a display are subjected to a relatively long current pulse that they do makes the human eye appear to be brighter, and that this bright glowing diode is subjected to a short pulse in addition to the long pulse mentioned, and that the light pen is only activated during the times of the short pulses. The advantage here is in particular that a purely digital control of the diodes is possible, since the brightness control is carried out only via a time control of the current flowing through the diodes, whereas the current intensity can be the same for all diodes. Those diodes that cause a display are thus operated in time-division multiplex,. where they are not suitable for controlling the light pen during those times in which they display the display, since the light pen is not activated. This embodiment can be implemented particularly simply because, for example, the 16 diodes of a column which are assigned to a specific actuator can be acted upon in succession with a short pulse each time, the temporal position of these Impulse is fixed and thus an identification of the respective light-emitting diode by the light pen, and after this period in which each of the 16 diodes, for example, was briefly energized once, a longer period is provided in which any of the diodes for display powering a display visible to the printer; which of the diodes lights up during this period depends, for example, only on the respective actual position of the actuator assigned to the column. It goes without saying that the display panel can also be used to display other information, for example to display the target values entered by the light pen, or simply to acknowledge that the light pen has entered information in the relevant column of the display panel. To distinguish them from the display for the actual value, these further displays could be characterized by a lighting duration that deviates from the display of the actual value, for example by a flickering lighting up. There is also the possibility of providing a separate light-emitting diode in each column, which is only used for receipt.

Depending on the number of light-emitting diodes in the entire display field and the clock frequency with which the light-emitting diodes are briefly illuminated one after the other to identify the position of the light pen, and also depending on the area covered by the light pen, more precisely its diameter, the speed of movement is with which the printer is allowed to move the light pen over the display field. This is the maximum for the values explained in the later exemplary embodiment Driving speed of the light pen in the coarse display operating mode 60 cm / s. The permissible speed of movement of the light pen can be increased in a further development of the invention. In this development, two control cycles are provided for the elements, with all elements being controlled in a predetermined sequence at a predetermined pulse repetition rate in a first control cycle, and the arrangement is such that after a desired value has been entered by the light pen at any point the matrix uses a second control cycle which, at the same pulse repetition speed, controls only a part of the elements in the spatial environment of the position of the display field at which the light pen for entering the target value was placed. During the first drive cycle, it is recognized with certainty that the printer is placing the light pen anywhere on the display panel. It is then switched to the second control cycle and no longer the entire display field is controlled, but only a part of the display field in the vicinity of the light pen just placed on it, and the individual columns of the matrix of the display field in this area can therefore be controlled more frequently in succession and thus the Lichtgri ^f fel in this controlled area are moved faster than in the first control cycle. The area of the display panel that is activated in the second activation cycle moves with the movement of the light pen. If no further information is entered into the device by the light pen during a predetermined time, the device concludes that the printer is removing the light pen from the device Has removed the display panel and switches back to the first control cycle.

• Fig. 1 eine vereinfachte schematische Darstellung einer Druckmaschine mit einem Ausführungsbeispiel einer erfindungsgemäßen Einstellvorrichtung,
• Fig. 2 eine schematische Darstellung eines mit einem Stellzylinder gekoppelten Stellmotors,
• Fig. 3 die Draufsicht auf das mit Leuchtdioden bestückte Anzeigefeld der Einstellvorrichtung, teilweise abgebrochen,
• Fig. 4 ein Prinzipschaltbild der Elektronik der Einstellvorrichtung,
• Fig. 5a und 5b ein Impulsdiagramm,
• Fig. 6 ein Impulsdiagramm
• Fig. 7 ein weiteres Impulsdiagramm.

Further features and advantages of the invention result from the following description of an exemplary embodiment of the invention with reference to the drawing, which shows details essential to the invention, and from the claims. The individual features can each be implemented individually or in groups in any combination in one embodiment of the invention. Show it

• 1 is a simplified schematic representation of a printing press with an embodiment of an adjusting device according to the invention,
• 2 shows a schematic illustration of a servomotor coupled to an actuating cylinder,
• 3 is a top view of the display panel of the setting device, which is equipped with light-emitting diodes, partially broken away,
• 4 shows a basic circuit diagram of the electronics of the setting device,
• 5a and 5b is a timing diagram,
• Fig. 6 is a timing diagram
• Fig. 7 shows another pulse diagram.

1 shows, in a side view, partially broken away, an offset printing machine 1 with five printing units, two of which are not visible. Some parts of a printing unit 8 are shown in one of the machine parts. The printing unit has a plate cylinder 2 which carries the printing plate and cooperates with the blanket cylinder a, which transfers the printing ink to the paper to be printed, which runs between the blanket cylinder 3 and an impression cylinder 4. From the associated inking unit, only the ink metering box 5 with duct 6 is visible. At the lower area of the ink metering box 5 there is a divided ink knife 7, which consists of a series of actuating cylinders 15 (FIG. 2), each of which is connected to a servomotor 9. The printing unit 8 is also assigned a dampening unit 11 which has a water tank 12. Numerous other devices, in particular rollers for transporting the printing ink and water, and transport rollers are not shown for the sake of simplicity.

2 shows in simplified form the adjustment mechanism for one of the actuating cylinders 15 of the divided color knife. The servomotor 9 designed as a DC motor drives one. Shaft 16 with which a potentiometer 17 is coupled. The shaft 16 carries a section 18 which is threaded at its end and on which an adjusting piece 19 is screwed and is connected via a link 20 to a lever 21 rigidly connected to the actuating cylinder. The lower bottom of the ink metering box 5 is formed by a plastic film 22, and depending on the position of the adjusting cylinder 15 having an eccentric twist 14 this plastic film 22 is pressed more or less close to the outer surface of the duct 6, thereby forming a more or less thick gap 23 through which the ink can reach the lower region of the duct roller 6. The ink is then removed from other rollers of the inking unit in a manner not shown. The adjusting cylinder 15 is thus adjusted by displacing the adjusting piece 19 as a result of a rotary movement of the servomotor 9. Two of the electrical connections of the potentiometer 17 are connected to a voltage source, and the wiper of the potentiometer is led out via a third line 24. The potentiometer 17 thus allows the respective position of the actuating cylinder 15 to be measured electrically precisely. 32 actuating cylinders 15 are assigned to each of the printing units of the printing press. The electrical connections 25 and 26 of all the servomotors 9 and the lines 24 of all the potentiometers 17 are led via a cable 27 to a control unit 30 which has a display field 31 equipped with light-emitting diodes, on which, by means of a keyboard 32, the - actual positions of the actuating cylinders can be selected 15 each of the individual printing units can be displayed. The control device 30 has a light pen 33 which is connected to the control device via a connecting line 34. The light pen 33 contains a light-sensitive element, for example a phototransistor. The light pen 33, which has approximately the size and shape of a ballpoint pen, can be moved manually over the display field 31 in order to enter data into the control device 30. The keyboard 32 contains a large number of pushbuttons for controlling the control device 30.

3, the display panel 31 is shown separately. In the example, the display field 31 contains thirty-two columns, each with sixteen light-emitting diodes 35. The individual columns, of which only a total of 4 are shown due to the broken-off representation, are designated by Z 1, Z 2,.. the assignment to the total of 32 actuating cylinders or 32 ink zones of a printing unit is indicated.

The position of the actuating cylinders 15 of a printing unit of the printing press 1 selected by the keyboard can be displayed in two different ways. In the rough display type of display, exactly one diode lights up brightly from each column of the light-emitting diodes 35, so that 16 different positions of the respectively assigned actuating cylinders 15 can be read on the display panel 31 in this way. In the fine display position, the adjustment range of the actuating cylinder 15, each associated with two immediately successive light-emitting diodes 35 of a column, is subdivided into sixteen steps, and these intermediate values are indicated by a weaker light-emitting diode 35 of the same column which lights up in addition to the strongly illuminating diode. In this way it is possible with the display type fine display to display a total of 16x16 = 256 different positions of each actuating cylinder 15. Since each actuating cylinder is assigned to a color zone, the columns of light-emitting diodes are also referred to as "zones" below.

In the circuit diagram of FIG. 4, a 16-digit binary counter 4 _{1 is} provided, to which a rectangular clock with a frequency of 1.28 MHz is fed as an input signal, and the counter stages of which generate signals with a lower frequency from this clock signal. Namely, the clock signal T1 has half the clock frequency, the clock signal T2 a quarter of the clock frequency, etc. up to the clock signal T14, the frequency of which corresponds to the clock frequency multiplied by the factor 2-14. These clock signals are shown in FIGS. 5a and 5b, the time scale of FIG. 5b being heavily gathered compared to FIG. 5a, which can be seen from the comparison of the clock signals T6 in the two FIGS. 5a and 5b.

The signals T9 to T13 (address for rough display) on the one hand and T10 to T14 (address for fine display) on the other hand are fed to a 5x2 to 1 multiplexer 42, which receives the signals T10 to T14, which is the address for controlling the individual columns or zones of the Display field 31, via which decoder 43 feeds the display field 31, in which the light-emitting diodes are arranged in the form of a matrix, and this zone address T10 to T14 or T9 to T13 also feeds an address driver 44, with the aid of which information about 45 is obtained from the display memory 45 the current actual values of the individual actuators can be read out and displayed in the display field 31. The signals T3 to T6 pass from the counter 41 to a changeover switch 46, from which they can be used via a driver 47, a changeover switch 48 and a decoder 49 to control the individual light-emitting diodes of each zone. The signals leaving the switch 46 also reach a latch 50 in which In the step profile mode, the value entered once by the light pen can be saved. The output of the latch 50 is connected on the one hand to inputs of the display memory 45 and on the other hand to inputs of two bidirectional drivers 51 and 52, of which the driver 52 is also connected to the driver 47 and the changeover switch 48. The driver 51 makes it possible to transfer data from the circuit shown in FIG. 4 to the outside, for example to input it to a computer. An address driver 53, which allows the display memory 45 to be controlled by a computer, serves the same purpose. This computer, not shown, can be provided in order to convert the signals supplied by the individual potentiometers 17 (FIG. 2) into signals suitable for display on the display panel 31 and to enter them in the display memory 45. A control logic 55 is supplied by the payer 41 with the signals T1, T2, T7 and T8. The control logic is connected to the various components of the circuit shown by means of control lines shown in FIG. 4, and a control line 56 leads to it, with which the control logic 55 is informed whether a rough display or rough display with a fine display should be carried out on the display panel 31. Via a line 57, the control logic 55 can also be supplied with a write signal or a read signal from the external computer mentioned. The control logic controls, in accordance with the signal supplied on line 56, the changeover from coarse to coarse with fine display, which is referred to hereinafter simply as fine display, reading data from the computer and writing data to the computer, writing the profile with the light pen , in which the actual position of the light pen for each zone is recorded and the step profile writing, in which the position of the light pen for the actually scanned zone of light-emitting diodes, that is to say the data of this zone, is set to the same value for all zones located further to the right.

The data paths from the switch 45 to the latch 50 and from there to the memory 45 and the drivers 51 and 52 and to the driver 47 and from there to the drivers 52 and 48 are each provided twice, on the one hand for the rough display and on the other hand for the fine display. Depending on its control from the control logic 55, the changeover switch 48 switches one of its inputs (rough data or fine data) to its output, which is connected to the decoder 49. The information referred to here as "data" identifies a target or. Actual value of an actuator of a zone and thus one of the 16 diodes of a column or zone, which is determined by the information referred to here as "address".

• Die Ansteuerzeit einer Leuchtdiode beim Lichtgriffelbetrieb beträgt ungefähr 3 µs, der Lichtgriffel darf aber nur eine erheblich kürzere Zeit aktiv sein, oder sein Signal darf nur während einer erheblich kürzeren Zeit ausgewertet werden. Die Signale T0, Tl und T2 dienen zur Erzeugung des Freigabesignals des Lichtgriffels, und zwar darf der Lichtgriffel nicht zu Beginn der Stromflußzeit durch die Leuchtdiode eingeschaltet werden, sondern muß etwas sp'iter eingeschaltet werden, weil die Leuchtdiode tatsächlich erst eine kurze Zeit nach Einschalten des Stroms, bedingt durch die Transistor Schaltzeiten, zu leuchten beginnt; im Beispiel wird der Lichtgriffel etwa 0,8 µs später eingeschaltet als die Stromflußzeit der Leuchtdiode. Dem Lichtgriffel ist in der Steuerlogik 55 zur kurzzeitigen Speicherung des von Lichtgriffel aufgenommenen Signals ein Flip-Flop zugeordnet, das gesetzt wird, wenn der Lichtgriffel Licht erkennt. Dieses Flip-Flop muß bei der Betriebsart Profil rechtzeitig durch das LG-Reset-Signal zurückgesetzt werden, damit der Lichtgriffel zur Aufnahme eines weiteren Lichtimpulses einer anderen Leuchtdiode bereit ist. Wenn der Strom durch die Leuchtdiode abgeschaltet wird, so leuchtet die Leuchtdiode tatsächlich wegen der noch vorhandenen Ladungen eine kurze Zeit weiter; im Ausführungsbeispiel wird der Strom durch die Leuchtdiode mit dem LED-Freigabe-Signal nach Ablauf der halben Ansteuerzeit der Leuchtdiode abgeschaltet. Der Lichtgriffel wird bereits vor dem Ende der Leuchtzeit der Leuchtdiode abgeschaltet, damit das genannte Flip-Flop zuriickgesetzt werden kann und der Lichtgriffel zum Aufnehmen des Lichtimpulses der nächsten Leuchtdiode vorbereitet werden kann. Der Lichtgriffel ist also für eine Leuchtdiode, für die 3µs zur Verfügung stehen, nur etwa 1,5 µs in Betrieb, wobei je 0,75 µs am Anfang und Ende fehlen. Nach Ablauf dieser 1,5 wird der Lichtgriffel gesperrt. Das Flip-Flop hält dann den gespeicherten Wert noch eine kurze Zeit, und zwar so lange, daß dieser Wert in den Anzeigespeicher 45 übernommen werden kann, dann wird das Flip-Flop wie oben geschildert durch das LG-Reset-Sinal zurückgesetzt und bleibt für einige Zelt lang zurückgesetzt und somit inaktiv, bis der Lichtgriffel nach 0,75 µs in der Mittel der Leuchtzeit der folgenden Diode wieder aktiv wird. Die Signale T7 und T8, die die Grob- und Feinanzeige mittels der Leuchtdioden steuern, müssen beide ein niedriges Potential haben, damit der Lichtgriffel aktiv sein kann.

The signals T1, T2, T7 and T8 are supplied to the control logic for one of the following reasons:

• The activation time of a light emitting diode during light pen operation is approximately 3 µs, but the light pen may only be active for a considerably shorter time, or its signal may only be evaluated during a significantly shorter time. The signals T0, Tl and T2 are used to generate the release signal of the light pen, namely the light pen not switched on by the light-emitting diode at the beginning of the current flow time, but must be switched on somewhat later, because the light-emitting diode actually only starts to light up a short time after the current has been switched on, due to the transistor switching times; in the example, the light pen is switched on about 0.8 µs later than the current flow time of the LED. A flip-flop is assigned to the light pen in the control logic 55 for brief storage of the signal picked up by the light pen, which flip-flop is set when the light pen detects light. In the profile mode, this flip-flop must be reset in good time by the LG reset signal so that the light pen is ready to receive another light pulse from another LED. If the current through the light-emitting diode is switched off, the light-emitting diode actually continues to light up for a short time because of the charges still present; In the exemplary embodiment, the current through the light-emitting diode is switched off with the LED enable signal after half the activation time of the light-emitting diode. The light pen is switched off before the light-emitting diode ends, so that the flip-flop can be reset and the light pen can be prepared to receive the light pulse of the next light-emitting diode. The light pen is therefore only in operation for about 1.5 µs for a light-emitting diode for which 3 µs are available, with 0.75 µs missing at the beginning and end. After this 1.5, the light pen is locked. The flip-flop then holds the stored value for a short time, and so long that this value can be transferred to the display memory 45, then the flip-flop becomes as above described by the LG reset sinal reset and remains reset for a few tents and thus inactive until the light pen becomes active again after 0.75 µs in the mean of the lighting time of the following diode. The signals T7 and T8, which control the coarse and fine display by means of the light-emitting diodes, must both have a low potential so that the light pen can be active.

The control logic generates further control signals for the display memory 45, namely a signal CS (chip selection signal) for reading from the memory, and also a write signal WE rough with the meaning write rough and WE fine with the meaning write fine. The display field 31 always shows the data contained in the display memory 45. If the printer does not intend to use the light pen, the device is in a state in which the actual values of the actuators are contained in the display memory 45 and are therefore displayed. If the printer switches the device to light pen operation by entering a corresponding control command (in the exemplary embodiment via a pushbutton), the actual values just mentioned are still displayed. However, as soon as the printer has entered a target value for a zone using the light pen, this target value is immediately displayed in this zone, but no longer the actual value.

The write signals WE Coarse and Fine are generated in the profile light pen mode with each light pulse recognized by the light pen, while in the light pen mode step profile they are used to write the information mation serve in those memory locations that correspond to the zones to the right of the zone just detected by the light pen.

In Fig. 5a between the curves representing the signals T2 and T3 are still the signals for the light pen release (LG release) just mentioned, for resetting the flip-fop (LG FF reset) assigned to the light pen and the signal for the Connection of the light-emitting diode (LED release) shown.

In the lower part de: FIG. 5b, because the signals T12 to T14 do not have enough space on the drawing to represent a full period of the respective signals, the time periods are entered for half a period. This also applies to the signal T6 in Fig. 5a.

6 shows the timing of the activation of the individual light-emitting diodes of the individual zones 1 to 32 for the operating state of the input of the light pen with a rough display of the actual values. In zone 1, each of the sixteen light-emitting diodes is acted upon by a short current impulse for a period of 50 us, then the light-emitting diode which should be clearly visible to the human eye for rough display is actuated for 50 microseconds; the LEDs of zones 2, etc. to 32 are then actuated in the same way, which is then followed by zone 1 activation. The light pen is not active during those times in which the diode causing the rough display is activated during the illustrated time of 50 microseconds.

FIG. 7 shows a representation of a time diagram similar to FIG. 6, but here for the operating mode light pen operation with fine display of the actual values, with a rough display also taking place in the fine display, as mentioned above. For the individual zones, for example Zone 1, if, as in FIG. 6, the short-term activation of all light-emitting diodes in this zone is provided for the first 50 μs, the light-emitting diode causing the fine display is then activated for 50 μs, and finally the coarse display is activated Current applied to LED for 100 µs; Because of the longer lighting time, the latter LED appears brighter to the human eye. Following this time of 100 µs for the coarse display diode, the 50 µs of the next zone follow, in which the individual light-emitting diodes are briefly energized once in order to enable light pen operation. In the operating mode shown in FIG. 7, the light pen is not in operation during those times in which the fine display diode and the coarse display diode of the individual zones are each supplied with current for 50 microseconds or 100 microseconds.

In the operating mode gross display with light pen operation shown in FIG. 6, the throughput time or period from the activation of the first light-emitting diode to the activation of the last light-emitting diode is 32 × 100 μs, that is to say a total of 3.2 ms. Assuming that the light pen has a field of view of 2 mm in diameter and that the light point of the light-emitting diode itself is vanishingly small, this results in a maximum permissible travel speed v, with the printer's light pen may be moved across the display panel:

This speed of movement should generally be sufficient. If, on the other hand, the operating mode light pen mode with fine display according to FIG. 7 is used, the permissible maximum light pen traversing speed drops to 0.3 m / s because of the double throughput time or period time of 6.4 ms. This speed should also be sufficient in most cases, since in general the printer cannot enter the setpoints in this operating mode by drawing a possibly only slightly curved line on the display panel, but because he generally enters values that differ more visually from each other in the individual zones must, for example, control the bottom LED in some zones and the top LED in others.

If, however, it is desired to increase the maximum travel speed of the light pen just described, this can be done in the manner as already described at the beginning, in which case the arrangement is such that the control device is initially shown, for example, in FIG. 6 Operating mode scans the display panel until the electronics contained in the control device recognize that the printer has switched off the light griffel at one point on the display panel, i.e. entered a setpoint. The control of the individual diodes is now switched to a further operating mode in which the time intervals in which exactly one diode is activated in each zone for rough display remain unchanged, but a light pen time is not also provided for each zone. Rather, only for the zone that the light pen is currently controlling and for a number of zones adjacent to this zone, for example two zones to the right and left of the zone that is currently being controlled, are the individual pulses characteristic of the light pen time, of which 16 pulses within a tent space of 50 us follow each other, fed. If it is assumed that the light pen has been placed on zone? 2 in the display field, the arrangement is accordingly such that the individual pulses shown in FIG. 6 in zone 1 are not supplied to zone 1, but to zone 20 that subsequently the zone 1 is supplied with the pulse of 50 us long for driving the coarse diode, then the individual pulses shown in zone 2 in FIG. 6 are supplied to the diodes of zone 21 and so on, and the individual pulses shown in FIG Zone 5 not shown there would be assigned to zone 25. The individual pulses assigned to zone 6, not shown in FIG. 6, would then again be assigned to zone 20 and so on.

In this way, zones 20 to 25 are activated with individual pulses to which the light pen can respond, much more frequently than in the operating mode according to FIG. 6.

The printer can therefore move the light pen in this area of zones 20 to 25 much faster than the above-mentioned speed of 0.6 m / s. In the last-mentioned example, this maximum permissible travel speed is approximately 4 m / s.

If the electronics does not observe a setpoint input for a predetermined time because, for example, the printer moves the light pen too slowly across the display field and thus does not cross the light-emitting diode columns arranged at a mutual distance of 32 mm from one another in sufficiently short time intervals, or because it does has removed the light pen from the display panel, the electronics switch back to the operating mode shown in Fig. 6, because in such a case there is a possibility that the printer leads the light pen through the air to another point on the display panel, which of the rapid sampling just described is not detected. When the light stylus is guided through the air in this way, the light stylus cannot absorb light pulses from the light-emitting diodes. The period of time after which the electronics switch back to the operating mode shown in FIG. 6 when the input of a setpoint is not recognized can be, for example, 0.1 to 0.2 s.

It goes without saying that the switching of the scanning speed just described in order to increase the maximum permissible traversing speed of the light pen analogously also in the coarse display mode with fine display and Light pen operation, which is shown in Fig. 7, can be carried out with the necessary modifications.

Other possibilities for fast scanning of the light-emitting diodes are also possible in an area of the display field which is adjacent to the point of attachment of the light handle. So it is conceivable to first control all the columns for the rough display, and only then to control the narrow area just mentioned with short pulses for the light pen operation.

In the latter example in particular, in order to increase the maximum travel speed of the light pen, it may be expedient to shorten the light duration of the individual light-emitting diodes used for the rough display compared to the value of 50 as mentioned in the example, for example to 8 as permissible if the total throughput time or period from activation of the first LED in the display panel to the last LED is reduced compared to the 3.2 ns mentioned.

• Zähler 41: LS 163; Multiplexer 42: LS 157; Decoder 43 und 49: 4 bzw. 2 x LS 138; Treiber 44, 47 und 53, Unschalter 46: LS 244; Umschalter 48: LS 157; Latch 50: LS 373; Treiber 51 und 52: LS 645; Anzeigespeicher 45: 2101 A oder 2148.

In the exemplary embodiment shown in FIG. 4, the following integrated circuits are used for the individual components of the circuit:

• Counter 41: LS 163; Multiplexer 42: LS 157; Decoders 43 and 49: 4 or 2 x LS 138; Drivers 44, 47 and 53, switch 46: LS 244; Switch 48: LS 157; Latch 50: LS 373; Drivers 51 and 52: LS 645; Display memory 45: 2101 A or 2148.

Drivers 44 and 53, and 51 and 52 are integrated circuits with tri-state outputs.

• LS 00, LS 10, LS 22, LS 30, S 133, LS 32, LS 86, _LS 04, LS 02, LS 27, LS 08, LS 11, LS 21.

The control logic 55 contains the following integrated circuits:

• LS 00, LS 10, LS 22, LS 30, S 133, LS 32, LS 86, _LS 04, LS 02, LS 27, LS 08, LS 11, LS 21.

Claims (16)

1. Device for controlling a printing machine, in particular for controlling a plurality of servomotors (9) for adjusting actuators (15-21) for the ink film thickness profile and / or wet film thickness profile and / or for register adjustment of an offset printing machine (1),
characterized,
that for entering data and / or commands or their changes, a light stylus (33) designed as a light receiver is provided, which interacts with light-emitting elements (35) of a control panel (31). 2. Device according to claim 1,
characterized,
that the light pen (36) has a light source which interacts with light-sensitive elements (35) arranged in the control panel (31). 3. Device according to claim I,
characterized,
that the light pen (33) has a light receiver which interacts with light-emitting elements (35) arranged in the control panel (31). 4. The device according to claim 1,
characterized,
that the light pen (33) has a light transmitter and a light receiver, which interact with light-absorbing or light-reflecting elements (35), in particular liquid crystal elements, arranged in the control panel (31). 5. Device according to one of the preceding claims,
characterized,
that the control panel (31) has a screen. 6. Device according to one of claims 2 to 4,
characterized,
that the elements (photodiodes or light emitting diodes (35)) are arranged in the form of a matrix in which each actuator is assigned a row (zones Z 1 to Z 32) of elements (35) and in which the rows are transverse to their own Are arranged side by side in the longitudinal direction. 7. Device according to one of the preceding claims,
characterized,
that an operating mode (step profile) can be switched in which a single setpoint entered at any point on the control panel (display field 31) for one of the actuators (15-21) as the setpoint for a predetermined group of the actuators (15- 21) is used. 8. Device according to claim 7,
characterized,
that the predetermined group includes all those actuators (15-21) which are located in the representation of the matrix on a predetermined side (for example on the right) of that row of elements into which a desired value has been entered by the light pen (33). 9. The device according to claim 7,
characterized,
that the operating mode (step profile) can be switched such that at least one of the following options can be switched on for the predetermined group of actuators (15-21): the predetermined group of actuators (15-21) is to the right, left, and / or to both sides of that row of elements (35) into which a setpoint was entered by the light stylus (33). 10. Device according to one of the preceding claims, in which the matrix contains light-emitting diodes (35) which are also used for display purposes,
characterized,
that the light-emitting diodes (35) are acted upon in a predetermined sequence by current pulses, such that those light-emitting diodes (35) which do not cause any display are acted upon with such a short current pulse that they are not bright or only weakly bright for the human eye appear, whereas those light-emitting diodes (35) which represent a display are acted upon by a relatively long current pulse which makes them appear to the human eye to be brighter, and that this light-emitting diode (35) has a short pulse in addition to the long pulse mentioned is applied, and that the light pen (33) is only activated during the times of the short pulses. 11. Device according to one of the preceding claims,
characterized,
that two drive cycles are provided for the elements (35), with all the elements (35) being driven in a predetermined sequence with a predetermined pulse train speed with short pulses for the light pen operation in a first drive cycle, and that the arrangement is such that after Entering a desired value by means of the light pen (33) at any point in the matrix uses a second actuation cycle which, with the same pulse repetition speed, only a part of the elements (35) in the spatial environment of that point on the display panel (31) at which the light pen (33 ) was set up to enter the setpoint, controlled with short pulses. 12. Device for controlling a printing machine, in particular for controlling a plurality of servomotors (9) for adjusting actuators (15-21) for the ink film thickness profile and / or wet film thickness profile and / or for register adjustment of an offset printing machine (1),
characterized,
that for data and / or command correspondence between operating personnel and a control unit (30) of the printing press (1) as a Light receiver designed light stylus (33) is provided which can be brought into optical coverage for data and / or command initiation with at least one light-emitting element of a display field (31) of the control device (30) designed as a light-emitting diode (35), the data and / or commands or their changes can be used at least for an actuator (15 - 21) and / or a predetermined group of actuators (15 - 21) which are directly, left and / or right of the opto-electronic contact point between the light stylus (33 ) and the entry point in the display field (31) are assigned. 13. Method for controlling a printing machine, in particular for controlling a plurality of servomotors (9) for adjusting actuators (15-21) for the ink layer and / or wet layer thickness profile and / or for register adjustment of an offset printing machine (1),
characterized,
that data and / or commands or their changes are entered into the printing press (1) by means of a light stylus (33), for which purpose the light stylus can be placed on a control panel (31) selectively or can be moved in the longitudinal direction thereof, and the data or command transmission by means of optical and / or optoelectronic elements (35) corresponding to the light pen (33) in the control panel (31) and that the data and / or commands entered or their changes can be used to adjust the servomotors (9) and / or command execution. 14. The method according to claim 12,
characterized,
that the movement of the light pen (33) in the longitudinal direction of the control panel (31) can be carried out in a straight line, step or curve shape and the data and / or commands or their changes for adjustment at least one servomotor (9) assigned directly, on the left, on the right or on both sides of the input point in the control panel (31) to the value (s) entered. 15. The method according to claim 12 and / or 13,
characterized,
that the adjustment of the servomotors (9) and / or the execution of the command takes place immediately automatically after the data and / or commands or their changes have been entered into the control panel (31) or only after manual command initiation. 16. Method according to one or more of the preceding claims,
characterized,
that the entered data and / or commands or their changes can be stored, can be displayed in the control panel (31) and can be called up for adjusting the servomotors (9) or executing the commands.

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