DE1763330C - Arrangement for determining the register error between successive work processes on a material web - Google Patents

Description

produce.

35 By switching on another preset

ble counter, which is assigned to the second scanner, a counting pulse is only sent to the actual error counter issued when a previous

The invention relates to an arrangement of a certain number of counting pulses from the im-

to determine the register error between onein- 40 has entered, so only after one through

other subsequent work processes on a material- the presetting of this counter predetermined im-

track with a first scanner for generating a number of pulses. This setting is easy by changing

The first option to preset the counter corresponds to the first work process. the

Control pulse and a second scanner for complicated and time-consuming exact alignment

The generation of a subsequent work process by the second scanner is thus avoided. To this

speaking second control pulse as well as with a way, it is possible, for example, the cut edge

Error counter for counting the number of occurrences of a punch card at a very precise distance from

of the two control pulses to place the counting pulses generated in their first row of holes, as is

a pulse generator, which one of the route of the position of such punch cards for their later

Emits a proportional counting pulse sequence for the web run. 50 need with great accuracy is required.

An automatic register control of this type is The invention is described in the following on the basis of

Often necessary in the graphic arts industry, if there are mathematical drawings on an exemplary embodiment

for example, successively repeating work explained in more detail.

operations on a moving. Material web from Fig. 1 shows the application of an invention

Paper, cardboard, plastic foil, metal foil or the like.

Executed on individual sheets of such materials direction with a register adjustment device in the form

should be. Such processes in which such a path loop;

Controls are advantageous, are z. B. Two or F i g. 2 shows the top view of a data card, Multi-color printing process, the insertion of pre- as with an arrangement according to the invention and printed webs or sheets in newspapers or 60 of a device according to FIG. 1 can be produced, and Newspaper parts, inserts or the like, cutting, faI- the different to adhere to such data cards, Folding, cutting, perforating, dimensional accuracy;

Hammer or the like, each congruent with the previous F i g. 3 shows a block diagram of an inventive

outgoing print samples or with other previous measuring and control arrangements,

machining carried out on the track. 65 In the device according to FIG. 1 is a continuous

In a known arrangement of the initially driven material web 10 from the left

mentioned kind (USA.-Patent 3 068 787) can to the right one after the other a conventional device

by the error counter the time between the 12 for register setting, for example a change

steering loop, an optical path scanner right edge 40 of the data card is the critical one 14 and two cutting cylinders 16 are supplied. At the pressure-cut dimension made according to the invention The axis of one of the cutting cylinders is a cylinder that is to be monitored. With an inventive Position sensor 18 is attached and is thus by this arrangement in the embodiment driven. As well as the path scanning device 14 as S according to the invention, any error in register retention also the cylinder position sensor 18 are electrical speed between the measuring mark 38 una the Schnittvormit a digitally operating register computer 20 is bound by the rotatable web cutter 16, measure up.

Although any known type of device 12, instead of measuring the entire distance A , can

are applicable for register setting, in «> any other arbitrarily chosen and essential practice, the device 12 shown in Fig. 1 in borrowed smaller monitoring distance B between the form of a deflection loop in connection with the front edge of the measuring mark 38 and a zero reference of an arrangement according to the invention as special position 42 can be used. The zero reference position proved advantageous. With such register setting presets, the cylinder position sensor 18 reports can be known with a suitable control, and the controlled distance B corresponds to a very precise register accuracy. In the case of the register setting device 12 shown, two control buttons 44 and 46 according to FIG. 1, the web 10 runs around rollers 22, 24 and 26 and is adjustable. These buttons are on the computer housing so a reversing loop of variable length, which is determined with T for the tens and with U for the one by the position of the roller 24, which denotes 20 control pulses that are then applied in the vertical direction via a suitable control device. operating mode explained in more detail are necessary. On the housing direction 28 is displaceable, so that the relative position of the computer is also a zero instrument 48 attached to the movable path with respect to the cutter. Each scale unit corresponds approximately to cylinder 16 either advanced or retracted - 0.04 mm. what can be drawn from the nominal accuracy. In the simplest embodiment, the arrangement corresponds to the arrangement according to the invention, the control device 28 is a hand-held device if it is used for the production of data cards with a steering wheel. Of course, repeat lengths of approximately 18.7 mm can also be used for this purpose. Servo control systems can be used. Although in this particular case the pressure cut is not discussed in detail below. Distance A about 28.5 ± 0.05 mm. The one to be controlled is assumed that the output signal of the calculator 30 distance B is nominally chosen to be 2 mm,
ners 20 not only left a digitally readable display The cylinder position transmitter 18 comprises an im-

fert, but at the same time also the control device · pulse generator or a rotary digital converter, the 28 trains for automatic adjustment of the web a predetermined number of pulses, for example can be. 5000, during each revolution of the cutting

Before passing through the scanning device 14 35 cylinder 16 is generated. In this way everyone corresponds the web is printed in a suitable manner, at a specific length of the pulse through the for example according to FIGS. 1 and 2 with a web of material running through like a cutting cylinder, repetitive patterns, as required for data cards. Under normal conditions, this corresponds to a pulse signal that is. Such a data card} is known to have 0.04 mm of the path, i.e. the scale division of the several lines of data marks 30 and also 40 measuring instrument 48.

The cylinder position sensor 18 also contains significantly more different columns of this type

Data stamps. If the web in the figures is moved to a position detector to generate zero right, column 32 of the data lungs reference pulses will be furthest to the right for each revolution of the mark, and this column of the cutting cylinder, ie such a reference pulse, will be the first column referred to because they first the down 45 after every 5000 pulses of the pulse generator. In sensing device 14, regardless of the fact that F i g. 2, the zero reference position 42 corresponds to the column in data processing devices, in which this zero position reference 32 generally has the highest priority. impulses occur. The distance B, which is nominally 2 mm

The data marks 30 are applied in such a way, corresponds to 50 pulses, and the preprinted that they have different light transmission 50 the edge of the measurement mark 38 is accordingly 50 pulse properties compared to the unprinted section after the zeroing reference pulse.
own the railway. In this way, the cylinder position sensor 18 is no further

manual adjustment devices easily represented by standard optical devices, can be carried out by the scanning device 14. After which a mechanical pre-setting of the F i g. 2, a mark 55 circumferential position of this encoder will be fixed in the scanning device Scanned area 34 that is about the same size as the hairline possible at the point of use and is in the form of a single data mark. One corresponds to the zero reference pulse. The we movement of the printed web 10 by scanning such actuating devices in combination devices 14 generates a scan line 36 which is ticn with the switches 44 and 46 in the following Line of data marks intersects. Explained in more detail on the 60th.

Intersection of this particular line and the first according to the block diagram of FIG

Column of the data marks is a single identifier. This measuring mark 38 forms a register identifier located within the cylinder position transmitter 18, which is on the path by a suitable work 65 and which generates 5000 pulses per revolution of the working device, for example a printing cylinder, cutting cylinder. A zero reference signal generator is applied. The distance A between the front 52 indicates the corresponding arrangement within the edge of this measuring mark 38 and the front or cylinder position transmitter, which the Nullstellunes-

Reference pulses generated per revolution of the cutting roller.

The electronic circuit described below works with a so-called negative Logic according to which a high signal of a positive voltage, for example 3 volts, and a low Signal roughly corresponds to earth potential. This logic means that when a high input signal is applied to a gate like a NAND circuit, whose output is low. However, if all inputs to the NAND gate are low, then is the output signal high. The bistable flip-flop circuits are actuated by high input pulses, which in turn generate low "affirmative" output signals. In a bistable four-pole circuit thus generates a high signal at the control input that the 1-output goes low and the 0-output goes high will.

The arrangement according to the invention also includes conventional decadic counters which also work in binary form in what is known as negative logic, as the following table shows, in which the decimal outputs are each formed by the sum of the binary levels with an L signal in the associated line, with H a high and L means a low signal.

1 2 4th 8th 0 H H H H 1 L. H H H 2 H L. H H 3 L. L. H H 4th H H L. H 5 L. H L. H 6th H L. L. H 7th L. L. L. H 8th H H H L. 9 L. H H L.

With the pulse generator SO, the zero reference signal generator 52 and the scanning device 14 are each pulse-shaping preamplifiers 54, 56 and 58, respectively. The continuous train of positive impulses Control pulses from the preamplifier 54 are fed to an inverter 60 and a line 62. the The output of the inverter 60 is connected to a line 64 and a NAND gate 66. A decadic one Counter 68, the units counter, is connected to the output of gate 66. All outputs - 1, 2,4 and 8 - of the units counter are through the units switch 46 can be preset by hand on the front panel of the counter 20. An increasing activity of the Units switch 46 resets each of the outputs of the units counter to the f / state. In a similar way The tens switch 44 is connected to a second decadic counter 70 for presetting.

The input of the tens counter 70 is connected to the 8 output of the units counter. As the The counting table above shows, the output line 8 goes high after receiving the noil or tens pulse. For every ten pulses from the pulse generator 50 that also pass through the gate 66, the Zchner counter 70 by one decimal point.

The 1 and 8 output of the tens counter and the pulses on line 62 of the pulse preamplifier 54 are fed to a NAND gate 72. Since the 1 and 8 lines are only used during the reception of the ninetieth pulse are simultaneously low and line 62 on the falling edge of each appearing on it Pulse is low, gate 72 will only open on the falling edge of the ninetieth pulse high. A bistable circuit 74 is with her

ίο control input S connected to the output of this gate 72. This sound therefore creates a low

The output signal when the descent occurs edge of the ninetieth pulse.

The output of the bistable circuit 74 is connected to a NAND gate 76. The line 62 forms the second input for this gate, and this makes this gate a continuous one Pulse train supplied. An inverter 77 connects the 8 line of the tens counter 70 with this

»O Nand gate and thus switches this on each time Falling edge of the hundredth pulse. During the distance ß, which ends at the hundredth pulse, so this NAND gate remains in its lower position. The output of the NAND gate 76, to which

»5 chem the so-called counting pulses occur is directly connected to a line 78, which forms the final output for the initial counter circuit. From an inverter 80, the output signal of the NAND gate 76 is fed back to the reset inputs of the counter switches 44 and 46 via a line 82, in order in this way to reset the counters 70 and 68 in each case before the measurement of the distance B of each data card od. Like. To enable.

The circuit described so far cannot work before the second input of the gate 66 a low signal occurs. By activating the control input S of a bistable circuit 84 via a zero setting reference pulse from the reference signal generator 52 via the associated preamplifier 56, the required low signal is fed to the second input of the gate 66, so that the Pulse train then actuate counters 68 and 70 and the other logic circuits associated therewith can.

Two bistable circuits 86 and 88 form part of an error counter. Their control inputs S are each connected to the preamplifier 56 via a line 90, so that these circuits are at the beginning

address the measurement of distance B. The inputs of two gates 92 and 94 are each crossed connected to the outputs of the two bistable circuits 86 and 88. That way will one input of each of these two gates when generating the zero setting reference pulse low held, which is fed via the 1 output, and both gates take effect when the bistable Circuits whose 0 outputs are connected to the other inputs of these gates are reset will. These four elements 86, 88, 92 and

94 form the logic determination circuit through which the relative position of the measuring mark 38 in relation on the adjacent end 95 of the distance B is determined. The ideal state for both gates would be that they both become effective at the same time, which would mean that the measuring mark 38 exactly at the end

95 of the distance B and thus the pressure-cut distance A is precisely maintained. The administration

1 8th

90 from the zeroing preamplifier is fed to the valley counter 108 , which is also in binary

Reset input R of the bistable circuit 74 How the decadic counters 68 and 70 work,

connected to its output up to the ninetieth. The counter has a reset input that starts with

Impulse high to hold. The output at gate 76 of line 90 of preamplifier 56 is connected.

is therefore a train of pulses, which after the hundred s The binary output signals of the output counter

The first pulse and before the zero setting reference 108 are sent directly to a buffer memory 110

impulse lies. Because the distance B is equal to 50 pulses and there temporarily in their original

should be and this distance measurement is stored in the hundred-binary form, controlled by

The first pulse ends, the zero position reference must be an inverter 112. As long as the output signal

impul occur at the fiftieth impulse. This will io of the error duration gate 96 is low and the digital

through the presetting of the decadic counter 68 output pulses flow to and from the counter 108,

and 70 are reached via their control switches 46 and 44 . the inverter 112 outputs a high signal to the

According to FIG. 3, the reset input Λ of the buffer memory 110 is turned off and makes it effective, the bistable circuit 86 is connected to the line 78. As soon as the NAND gate 96 goes high again, the outputs and thus receives the last, ie the hundred Inverter sends a complementary signal to each of the first pulses, called the counting pulse. The set memory sections of the buffer memory Λ input of the bistable circuit 88 is from. In this way, the buffer memory receives the sampling pulse of the scanning device 14 via the pre-complement or the “near” value of the digital output amplifier 58. The circuit counts on this output signal, which at the end of the counting of the way the pulses between the sampling pulse, wel- ao error pulses are retained. This is shown in Fig. 3 when rather the position of the measuring mark 38 reproduces, and memory 110 by the designations T, 2, 3, 5 at the occurrence of the end of the distance B, which is indicated by the outputs.

the hundredth control pulse as a counting pulse via the outputs of the buffer memory 110 and

line 78 is displayed. the error direction output of the bistable circuit

The remainder of the circuit according to Fig. 3 measures on digital «5 98 the inverter 114 is connected, through which valley way the error pulses, this digital converts these signals into an exact sum current, appropriately counting result converted into an analog signal of corresponding polarity and the display -Polarity reverses and this analog signal is fed to the on-instrument 48. This current directs pointing instrument 48 to. For this purpose, the instrument is fed by a 0.24 mm division for a gate 96, the output signals of the two 30 pulses supplied to the counter 108 , and NAND gates 92 and 94, so that a low either in the "register error signal" labeled L on the scale is generated during the neth long duration or the short duration denoted by S during which one of the directions, depending on the corresponding actual NAND gate 92 or 94, is effective before the other physical conditions and the from it becomes over. The inputs S and R of another bistable 35 concluded the circuit.
Circuit 98 are also connected to the outputs of the A further NAND gate 116 is connected to the 1 and NAND gates 92 and 94, and these circuit 8 output lines of the counter 108 generate a characteristic output signal, each one third: . The input of this NAND gate is connected to the preamplifier 54 via the one of the two NAND gates 92 or line 62. The 94 first took effect. A control signal example 40 output of this NAND gate 116 is available with the way from NAND gate 92 generates a low output reset input of a bistable circuit 1 18 in the output signal of circuit 98, which indicates connection whose control input to line 90 is that the counting pulse is connected in advance of the scanning pulse, so that it goes through it to the zero position, that is to say that the reference line 95 is to the right of the reference pulse at the beginning of each measuring section - measuring mark 38; in this case the pressure will be 45 leads. This periodic setting of the cut distance too long, similarly generated circuit 118, makes its output line 140 select a reset signal from NAND gate 94 a high rend of the duration of the measurement period low and keeps output signals of the bistable circuit 98, and it thus also the one input of the gate 102 low is thus indicated that the measurement mark 38 is internal, as was explained above. If the error is within the controlled distance B; the pressure number T is reached, the output of the Nand-cut distance A is therefore too short. The NAND gate gate 116 high and the bistable circuit 118 to-96 thus measures the duration and thus indirectly also the reset, and this thus blocks the pulse size of the register error, and the circuit 98 feeds through the input line 104 the wrong is true of the nature and direction of the error. Gate 102 until the next setting pulse via the

The output of the NAND gate 96 is connected to a 55 line 90 from the zero position reference pulse

NAND gate 102 connected to the generator.

Pulse train on the line 64 from the output of the web 10 passes in FIG. 1 as said reversing stage 60 is supplied. With this first nand the Schleifeneinstelleinrichtung 12 AbGatter 102 is further connected even a normally tastcinrichtung 14 and then the Schneidzy'linder 16 low line 104, so that the initial 60 The distance between the scanner and the output signal of this NAND gate to the line 106 cutting cylinder is relatively small, but does not need to be a pulse train with a repetition frequency less than the length of the workpiece, for example because one pulse per 0.04 mm of the web feed and a data card to be produced. The scanning device depending on the respective web speed is mounted so that their scanning line 36 is. The pulses on line 106 allow 63 a single / x-ile of data marks to be assigned. thus a particularly accurate digital measurement of the initial setting of the inventive Alisiandes and thus of the register error. The arrangement is as follows:

The pulses of the line 106 are a digi- The web 10 is advanced until the

through

9 tr ίο

Measurement mark 38 about 2 mm in front of the scanning area 34 then by corresponding actuation of the

located. This attitude is not very critical. This counter can be done.

is not in Fig. 2 shown. If the instrument is calibrated this way, switches 44 and 46 are then set to fifty. The units and no deviation errors indicate, the invented counter 68 and the tens counter 70 are thus ready for operation, and the automatically to fifty before the beginning of each measuring switch 44 and 46 are no longer actuated. Every process discontinued. Since each measurement sequence ends after a hundred more instrument deviations from the calibration point of the pulses, the presetting leaves a remainder of fifty pulses, depending on the pressure-cutting action, which must go through the adjustment device while the OK tungl2 can be adjusted by hand or the web is moved 2 mm further - the same automatically by the output signal of the counter distance that the first mark in front of the scanning area 108, 110 z. B. in the same way as the current is. The next adjustment step is the manual adjustment of the instrument 48,
development of the section of the cylinder position sensor 18 If in the pre-setting for the register error to generate the zero position pulses, so that these 15 the setting of the switches 44 and 46 to the zero position reference pulses takes place exactly at this value 60, the first of the counters 68 position of the cylinder 16 are generated. 'and 70 pulse supplied as the sixty-first. The last pre-setting measure is the pulse counted. The fortieth pulse after the dynamic setting of the actual value of the activation of the Nand gate 66 by the distance B , which is the hundredth when the printing press is running, ao zeroing pulse source 52. When the distance between the measuring mark and the pulse, by which the measurement of the fixed controlled scanning range was set exactly to 2 mm and the distance B is ended. By the hundredth of the generator for generating the zero setting or so-called counting pulse, the bistable reference pulse is precisely reset to its predetermined position by circuit 86. The run that takes, the instrument 48 shows no deviation 35 measurement mark 38 generates errors via the scanning device 14. Such a precise setting, however, is a sampling pulse, by means of which the bistable can usually not be reached and is also not necessary. At circuit 88 is reset. The relative timing of the machine is simply adjusted by the loop difference between the occurrence of these two adjusting devices 12, until the pressure-cutting distance is achieved by means of the visual reset pulses, which are then converted into digital pulses. 30 converted, which are counted and stored. If the display instrument then indicates which of the reset pulses occurs first, a certain deviation error is displayed, the switches 44 and 46, which are also derived from a logic circuit, can be adjusted until the and converted into a polarity output signal. The display instrument returns to its center position. The stored digital value and its polarity takes on. If there is a larger deviation error, 35 are finally converted into a current signal, so the cylinder position transmitter can be adjusted again for the rough correction by which the display instrument 48 is actuated, and a fine adjustment is made.

1 sheet of drawings

Claims (2)

ι 2 occurrence of the two control pulses generated by claims: the two scanners are determined, and it can then be deduced how strong example 1. Arrangement for determining the register, the working patterns on the web from one another errors between consecutive working 5 differ. The prerequisite here, however, is that the operations on a web of material with a first scanner locally with respect to the web to exactly "" Scanners for generating one of the first work predetermined locations are mounted. The setting Process corresponding first control pulse of the known machine is very difficult and a second scanner for generating a time-consuming and cumbersome, because the buttons must are mechanically precisely aligned, corresponding to the subsequent work process, the second control pulse as well as with an error It is the object of the invention to provide a measuring arrangement narrator for counting between occurrences of this type to further educate and improve that the two control pulses generated counting pulses setting up and setting very simplified and a pulse generator, which is one of the routes of the even inexperienced workers quickly and nevertheless The proportional counting pulse sequence of the web run can be carried out with an accuracy of 15, there, characterized in that the This object is according to the invention, starting second scanner (52) a presettable counter from an arrangement of the type mentioned, ler (68,70) controls, which also released the counting pulses by the fact that the second scanner has a previous of the pulse generator (50) and controls the adjustable counter, which also controls the counting only after a predetermined number of counting ao pulses of the pulse generator are supplied and the pulse the second control pulse to the error - only after a predetermined number of counting I narrator gives. pulse the second control pulse to the error 2. Arrangement according to claim 1 for register counter outputs. containing cutting of sheets from one with reference to the arrangement according to the invention, for example one after the other Print samples are printed as wise to cut sheets in register Paper web by means of a cutting roller, thereby one with successive printing patterns characterized in that the second scanner (52) and printed paper web by means of a cutting roller If the pulse generator (50) is used synchronously with the cutting, it has proven advantageous to roll (16) are driven and by the two-way, the second scanner and the pulse generator th scanner each to drive a predetermined 30 synchronously with the cutting roller and Point of the circumference of the cutting roller a starting pulse by the second scanner in each case for the presettable counter (68, 70) correct point of the circumference of the cutting roller is generated. ~ a start impulse for the presettable counter