DE2812453A1 - DEVICE FOR CONTROLLING AND PRE-SETTING THE REGISTER AND ELIMINATING MAKULATURE ON ROTARY MULTICOLOR PRINTING MACHINES - Google Patents

Description

Dipl.-lr.g- R. LG: -nG!: O * 0Ί / 4 3 3

Dr.-Ing. H.-J. Ero ^ ne /
7ü Karlsruno 1

Arr.al '^ nstraßa 23
Pcatfac.i'.O 2ß ·

VILLAMOS AUTOMAT ₊

Budapest I., Krisztina korut 55, Hungary

DEVICE FOR CONTROLLING AND PRE-SETTING THE REGISTER AND ELIMINATING MAKULATURE ON ROTARY MULTI-COLOR PRINTING MACHINES

The invention relates to an electronic device which is suitable for controlling the color shift (Image shift) for presetting the register and eliminating waste

As is known, most of the printed products is a plurality of colors (newspapers, image time Signatures. Books) prepared in rotary printing machines · Each color is respectively printed by a separate printing unit (register) to the, running between the printing paper · The machines are generally 2 -16 printing units and 1-2 cutting registers equipped

A1252-1450 KF 80988 3/0591

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The paper can be fed anywhere in the printing press, i.e. individual printing units can or can be ignored the direction of rotation of the roller can be changed. (Selection of the BdTEj direction). There is also the option of the Separate Printing Press. It only comes to that when two types of products are produced at once »(selection of the printing direction ·)

The circumference of the pressure rollers can be changed depending on the size of the printed product.

The precondition for the printing work good quality is that those different in the individual printing units printed images colors, or "image parts each other exactly -überdec ken · Since the relative length of the current between the pressure rollers paper from the change in the quality of the paper, the The web tension, the gluing and other technological reasons depend on «the individual products can be shifted« This creates waste (defective products).

- In order to keep the color shift within a permissible range, the length of the paper between the adjacent printing rollers should be controlled. Can not be secured because in modern printing machines at high speed through hand control is had sufficient quality, one has a suitable for this purpose, _e, the pressure rollers controlling device used. Examples of this are the equipment of the UK company Crossfield and the GDR product with the name "REGISTOMAT".

The basic idea of the register-controlling devices is that on the individual printing units - in general on a place outside the pictures - a measuring figure, a so-called register mark is printed in such a way that the relative position of these register marks causes the image shift certainly. The image shift, i.e. the position of the register characters printed on the individual printing units, is determined by a two-channel optoelectronic path scanner scanned and

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the image shift is measured thereby

The corrected error character is obtained by adding up the error character obtained during the evaluation of the register characters and the basic character set by the specialist is controlled. The basic character set in advance by a person skilled in the art can bring about an artificially produced image shift, which can be justified by the asymmetry of the printing rollers or by other technological requirements.As the control value is obtained from an error character - which is always determined by measuring two register characters «The process is called the web-web process · But if the relative position of the two sides« or the cutting point on the cutting register must be controlled - the measuring process is called the "web-roller process". In this case, only one single register character should be scanned »for comparison, an artificially generated impulse should be achieved or gate sign called · In de In the known register control units, an independent analog control unit is arranged depending on the printing units , whereby their effectiveness is strongly influenced · One of these shortcomings is that the time constant of the regulator is large « to the fact that the perception and the intervention take so long that in the meantime many defective copies · leak · within the“ due to the costs and the dimensions constrained limits

809883/0591

no control option can be created »which, in consideration of the variable parameters (career _{tension, career path r} speed« etc ») - no printing accuracy is ensured« Another deficiency is that when the print program is changed, the register presetting is not carried out and the machine is converted therefore takes place «with a considerable amount of time · = and material losses The known devices are also not able to remove the waste · It is therefore necessary to assign separate devices to the printing press the register characters are printed one on top of the other). Thus, depending on the printing units, the value of the image shift cannot be set and the correction of the errors cannot be taken into account.

The known devices are also fraught with errors _like that dia technology data (career ", length, Walzanumfangc error correction) can not be accurately adjusted 2B ^» Allii depends on-the skill of the typographer. - or from his luck sb «> - Qyr © hd ± ® invention we would like the ■; _; / - - ■■ b © dra © t © n -Hfingel b. © © © itig © rao The essence of the invention lies i that we. an electric © ni @ ch @ _ö digätalisch® on «

hab © n ₀ in dtor the in time division multiplexer operations- ■ ^: 2B.- ". ■■■"

- ν parts. result £ es® '-' the values d © F Ragi © t © ry®r © in8t®llung and the

-r- 28124S3

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In the facility there is one who measures the error signs Unit 1 arranged · The number of this unit 1 corresponds to the number of printing units and the cutting registers · In the Unit 1 measuring the error characters is a path scanner -Circuit 1 * 1 built in «which to one, the error sign measuring circuits 1.2 is connected and are connected to the latter program setting switch 1 * 3 · The unit 1 is connected to a further unit that forms the gate signals 2 electronically connected · In the unit 2 are the following Partial units built in: on each side there is a pulse generator 2.1, each of which is connected to an input of a gate signal generating strobe circle 2 * 2 (which has several inputs) connected «to the other inputs of this circuit 2 * 2 are - upper Multiplexer 9 * 5 - which shift the gate signal of the pressure the program switch (not specified in detail) connected A program switch belongs to each print roller. Conveniently, we only have a single program switch 2 * 3 shown

The unit 1 measuring the error sign is with

the, the gate signals forming unit 2 connected in such a way that an output of the latter with the input of the path scanner circuit 1 · 1, its further output with an input of the Error sign measuring circuit 1 · 2 are connected · An output of the gate signal forming circuit 2.2 is to a

Output of a display circuit 8 * 1 connected · One

Another sub-unit of the switching arrangement is formed by a running track speed measuring unit 3. In this unit there are two circuits 3 measuring the running track speed (one on the left and one on the right). arranged; for each input there is one, the value of the waltz extensive setting program switch 3.2, others each one that Control speed setting program switch 3 * 3 connected «

To a · * input dee the runway speed

eeeeenden circuit 3 ·! there is always an exit to the gate signele forming circuits 2 * 2 connected · The program switches 3 * 2 - which, as mentioned, - to the career path.

speed measuring circuits 3 _# 1 are connected,

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- are - branched off from this connection - with an input of the circuit 2 * 2 «as well as via one« in the arithmetic Unit 4 located electronic switch 4,3 with an input of the arithmetic circuit 4 «! connected »In the arithmetic circuit is ever one, the length of the run » stretch setting program switch 4 * 2 built-in (to a program switch 4.2 is assigned to each printing unit) the over a multiplexer 4 * 4 to an input of the arithmetic Circuit 4 * 1 are connected * The output of the arith 4 * 1 metallic circuit is on the one hand with an input connected to another arithmetic circuit 5 * 1 (which is located in another arithmetic unit 5), on the other hand - branching off from here - with an input of a waste material sequencing circuit 7.1 (which goes into the «die Waste unit is installed) and via the electronic switch 9.6 and multiplexer 9.6 with a The input of an echrittrrückzahlenden circuit 6.1 of the engine control unit 6 is connected

To an input of the arithmetic circuit

5.1 are - via a further «analogous to the aforementioned Multiplexer 9.6 - circuits measuring false characters connected, the other input of the same arithmetic circuit 5.1 - via further,! analog multiplexers 9.5 - with the program switch 5.2 (which has the basic character switch) v «rbu * 4« n ist »(Ott number of program switches • tiramt with that of the printing units in agreement ·)

An output of the arithmetic circuit 5.1 is on the one hand to an input of the waste following Circuit 7.1 on the other hand - via an electronic switch ter 9.6 - to the input, a display circuit 8.1 a display unit 8 connected.

The other output of the arithmetic circuit 5.1 is - via a «to the aforementioned analog multiplexer 9.5 - to an input of an incremental return circuit · SiI (dir is built into the engine control unit and its

809883/0591

Number that corresponds to the pressure).

To the other input of the step-counting circuit 6.1, an output of the circuits 3-1 measuring the raceway speed is connected via an electronic switch 9,6 and from a branch the same outputs are to the analog input of the step-counting circuits 6,1 (which are arranged in the other motor control units are) connected »The outputs of the step return circuits are connected to the inputs oer stepping motors 6.2, while the other inputs of the same circuits are connected to a limit switch 5« 3 and to the push button switch 5.4. A program switch 7.2, which determines the sequence of the running route, is connected to an input of the waste-following waste line, and the program switch 7 "3 of the waste-adjusting circuit" is connected to the other input - via a further multirplexer 9.5. "The outputs of the circuit which eliminates waste - of the waste-related circuit 7.1 - are connected to the devices which are known per se and which eliminate waste. In the operation control unit 9 a "the operation-controlling circuit 9.1 is built, which has at least one output * The outputs of the same are connected to the control inputs of the functional units (under the reference characters l-δ) (they are not shown in the drawing.) Connected to the inputs of the operation control unit 9 are the switches 9 * 2 which carry out the presetting of the registers, the switches 9.3 determining the control and, via the multiplexers 9.5, the switches 9.4. The switches 9 · 4 are used to set the automatic operation or the pressure direction · Two of the switches 9 · * 2 - 9.3 are available, one on the right and one on the left. The number of switches 9 · 4 corresponds to that of the printing units. The device is never actuated as follows: The relative image displacement of the figures printed by the neighboring printing units is determined by the unit measuring the error mark

8098S3 / 0S91

■ ν- ■;!: ■■> ■ J / r ■ 43 ·

definitely like that? des the register characters scanned by the two-channel, optoelectronic rail sensor circuit l _o l and the distance between the register pulses R. ".R - which are made from the scanned characters by comparison, - by the rail sensor measuring circuit Io2" by means of, from dery the web speed measuring unit 3 incoming measuring frequency f _A. "F." Measured by counting the pulses ivirde A _s of the paper guide corresponding program ,, the determination direction of the web. · Or the selection of the measuring Methods (railway track "or Bahη roll) as well as the correction of the

The signs of the measured errors are determined by switches 1 _O 3; '. "■"".; ■ set ο

-_; - [/ ' The register characters are generally printed on a blank space and are selected by an "orignal G generated by the gate signal forming unit 2 = interference signals originating from the printed images or figures. The gate signal G is generated as follows? The the gate signal forming circuit 2o2 mete continuously the angular position of the pressure rollers with respect to a relative O ° position _a © This Messun9! "Followed by counting the pulses * either

from the right-hand or left-hand side "arriving from the machine-driven pulse generators 2el", as the register mark: arrives at the printing units to the web scanner ^ circuit l _e l - under the action of the _e in the web scanner built-in push button = the numerical value of the instantaneous angular position of the printing drum "is rewritten to the display circuit 8 _G 1« the displayed value is set by means of the program scarf = ters 2e3 (which shifts the displayed value) © the gate signal G will be generated by the _e the gate signal current = ■ . ■ "; circle 2e2.according to the respective angular position © of the - ^r : - pressure roller and.in the middle of the gate signal an auxiliary pulse ®r =>".'.-: .. "■ λ produced - the r for the measurement the operating mode "Bahn ^ Walse ⁰ necessary ± st _o

->. The pulse width of the gate signal <= ■ regardless of the rolling » _: .. ■ ^; . scope ;; ^ is instant » ^: 8iS883 / © Sii 35." · ■; - '. " . "; - .. The ones for measuring the image shift ₀ as well as for

"--- V. Keeping the .o the length of the paper bahrast stretch © instelling ■: -. ■ Step _{halimotor fl} and the to the train speed

-Ak-

proportional frequencies f., f .. are determined by the, the orbit speed measuring unit 3 generates · Since the rotary machine can be divided, this function is performed by two circuits with an analog structure and measuring the path speed are carried out 3.1 «The path speed is switched off the frequencies of the pulses from the pulse generator 2 * 1 and from the Value of the circumference of the print roller - this value being replaced by the Program switch 3 2 is set - calculated by the unit measuring the web speed £ The algorithm required for this is the following:

ρ ^B "7q3 '<=, where

V - web speed (ms ") 1 - i / i roller circumference (m)

i - impulse number of the impulse generator

L5 T - time of sampling

Algorythinus of the circuit that generates the measuring frequency f.:

^ δ ⁼ """" ^ T · f «· where
^A 10 ⁴ °

»0 f - frequency of the time signal (according to the necessary

Measurement accuracy «which is 0.01 mm, useful f _Q = 1 MHz).

The step switching frequency f .. is also related to the web speed proportional, but can be set using the program switch 3.3.

, whereby

V - the * value set by the program switch 3 · 3 is set.

The parameters K and Cj, which are necessary for control, or the values R_ of the register presetting, are calculated by the arithmetic unit 4 »Parameter K means - according to the paper guidance - the value of the roller circumference between two adjacent rollers, - however, on the train-

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S124!

Route length related *

,, 't WOUaJL

L - Bahiistreokeiilanye in mm *

1 - roller circumference in mm _{or similar}

The value of the track length is determined by the program switch 4 «2 * and the value of the roller circumference & is determined by the program« switch 3 * 2 set

Parameter C. means the modified value of the value K "

C _a SaÜL-. _ψ i _# where

^k 10

c - adjustable constant

The yy © rt of the register preset

R_ κ L - K _e l (in mm)

^E l

If the value is greater than ₀ than the modified one

Railway line length - depends on the iWaschins - so automatically the register presetting ;, is based on the value R_ "

B®i by means of the modified value, the R @ gi © tpre setting should be adjusted by 180 _{or similar}

The calculations are carried out continuously by di © arithmetic © unit 4. The calculated value © are stored separately depending on the printing units. _{The program switches 4 O} 2 raerd © n öb®r Irtaltiplüxsr belonging to the individual printing _{units for the arithmetic circuit 4 O} 3L zug® =

Dar su © inem without image shift @ rf®lgt © n print Throws X of the 8ahrastreek @ nmodifi2ierung raird through © in® itic © iinhoit 5 according to the following algorithm b © r®Ghn © t:

μ -

X = ι <(^ _n . / I _{n χ} ) * G _k . Λ _Β-1 , Where

^Η η * ^Η η «1
π ₂ " ^ϋηα

^Η η ^{Β H} m + ^K k

H β measured throat in a period n, H _k «basic signal, set by the program switch

The algorithm indicates a good quality PD character control. Because according to the invention - instead of one Time operator - a path operator is usually used in other controls, hears the effect of the changeable Parameters (track speed, track length) on »The necessary track increments are determined by the frequencies f., f .. generated in unit 3 measuring the web speed

The algorithm flow also contains correlation calculations

The control described above can - within a corresponding range - only through digital circuits being constructed·

The IVert X of the control is separate «depending on the Printing units, and depending on the roller rotation through the arithmetic circuit 6 is calculated and becomes the step countdown circuit 6 * 1 forwarded. The partial results are stored in a memory built into the calculation unit saved·

The value X calculated in the arithmetic unit 5 or the value R _£ calculated in the register presetting in the arithmetic unit 5 are passed on to the step-return circuit 6 1 of the motor control unit 6

The written value X - depending on the application of the machine - through the step switching frequencies f or f. repaid, i.e. the step

809883 / QSS1

switch motor switch as many © steps & η _{ΰ di®} d®m correspond to value X The direction is determined by the sign of the value® © X The register presetting is carried out in two steps?
1 »The stepper motor © are in the lower end position

set This Lag © is afogo keyed and displayed _{by the limit switch 6 O 3 *)}
2 The stepper motors move according to the, in the step down counting ^ Strcmkrsis 6 _O 1 values,

In the register presetting, the step switching frequency is ^ u « independent of the path speed o

The stepping motor is switched manually by means of switches 6 _O 4 _O. The defective printed matter is separated out by the door separating device 7 under the control of a waste disposal device attached to it

The makulaturfolgende circuit 7 _O 1 comprises step switch register _e the number by which the printing units corresponded The length of the register corresponds to a greatest K value, which is the printed matter number is equal <> which can be printed on track distance between the adjacent printing units "

Both the _s set and permissible value of the image shift _s set by the program _{switch 7 O} 3 as well as the value H (which is the algebric sum © of the measured error © and the basic symbol) are compared with each other Printing on the given printing unit is faulty ": or correspondingly _o If the printing is faulty, then the with every revolution of the roller: it is scooped ©

The connection of the individual step switch @ g £ @ t®r

- according to the respective paper insert® <= can be carried out by UIm ₀ - di® sequence of the web stretch © determining program content® (r 7 _e 2 _o

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The waste removal device ensures that

that every one produced on any printing unit is faulty Printed matter - regardless of the roller circumference and the paper insert, can be ejected at the end of the machine

The current operating status of the facility,

and the calculated values are represented by the display device 8 depending on the printing units, shown digitalisch · The display device 8 also includes a Oszylloscope at which the relative position of the T _O rsignals and Registerzeicheri be displayed · The external control signals of the device generated by an operation control unit 9 The switches 9.2 and 9.3 can be used to determine the right-hand or left-hand register presettings or controls, with switches 9.4 determining the automatic operation of the individual printing units or the direction of the printing.

The multiplexers 9 »5 - which are constructed analogously to one another and are therefore designated by an analogous reference number - are used to connect the unit 1 measuring the error signs, the motor control units 6 and the other actuation, and program units, - according to the programs of the operation control unit ·

Although the register presetting of the printing press takes place automatically by means of the device, the device can only function without defects if the information is stored precisely by a specialist. As a result, the register presetting, the control of the color shift, and the elimination of the faulty printed matter can be carried out in accordance with the technological operations described below. The wheat of the device that adjusts the paper length is put into a relative O-position, for example in an end position, by switching the attached stepping motors. Then, with the help of the same device, the quotient of the length of the paper path between the neighboring printing units - according to the insert of the papers - and the scope of the applied printing

809683/0591

roller is formed if ddt ¹ half the value K u'eu remnant is smaller than the setting option, - which can be permitted by the mechanical dimensions of the device, a number of progressive pulses are generated (this number corresponds to half the value K of the remainder) led to the stepping motor · Thus, the rollers that adjust the length of the paper are moved from the O-position to the desired or required position "and the printing rollers are mounted in the same angular position on the printing units - according to the image to be printed" If half of the upper block is larger than the setting possibility, half the value of the roller circumference is deducted from the leftover, then as many incremental pulses are sent to the stepper motor, the number of which corresponds to half the value of the leftover on the adjacent rollers, rotated by 180 °, mounted in the printing unit · The depending on the roller The value of the image shift measured by the rotation of the printing units is fed into the common arithmetic, so that the value modifying the paper web path for controlling the image shift is calculated depending on the printing units in such a way that, of the error value measured during roller rotation "n", the error value during roller rotation "1 " measured value is subtracted _o The difference is compared with the one mentioned; The value "K" is multiplied and ^{a result which is formed from two factors is added to this result "D M.} The first factor is the error value, measured at the roller rotation" n-1 ", the other factor is a, to the track length of the Paper proportional constant value "P" * Afterwards the stepping motor - which adjusts the path of the given printing unit - is incremented by means of a number of incremental pulses - whereby this number corresponds to half of the sum P + D Speed of the run of the paper is proportional

A series of index registers is used for each printing unit assigned in which the number of registers

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is equal to or greater than the greater one calculated earlier Value "K". The register rows are connected - according to the order of the paper insert - in such a way that the Output of a previous row of registers to the input of register "k", which is in the next row of incremental registers - counted in the opposite direction of the incrementation - connected «The register rows connected in this way are incremented depending on the number of roller revolutions · After that, the value measured after each roll revolution is used the image shift is compared with the permissible value of the error - which is set by a program switch that is assigned to each printing unitIf the measured value of the image shift is greater than the set value, then the register ^M k ^N - the one to the given Belongs to the register row assigned to the printing unit - overturned from its basic position · This overturned state is counted for a faulty print · The output of the last register is then reached as the last printed matter Printing unit exits · This signal causes the ejection device actuated

809883/059;

Claims (2)

PATENT CLAIMS I.) Device for controlling and presetting the register and for eliminating the waste of rotation ".-Ν"-;-; - ^ multicolour adruckraa ^ machine, in which a unit measuring the error characters (l) a gate signal forming unit (2) a unit measuring the web speed (3) arithmetic units, (4,5) a motor control unit (6), a waste separating unit (7), an operation control unit (θ) and a display device (8 \) are installed, characterized 4 that in the error sign measuring unit (l) a path scanner electrical circuit (1!) is installed, the output of which is connected to the input of an electrical circuit (1 * 2) measuring the error sign, while the unit forming the gate signal (2 ) is electronically connected to the unit (l) measuring the error sign in such a way that an output of a gate signal forming circuit (2 * 2) located in the unit forming the gate signal is connected to the input of the path scanner current circuit (l * l) is , but its other output is connected to an input of the circuit measuring the error sign; in the unit (2) forming the gate signal are on the left 20 and on the right side pulse generator (2 · ΐ) arranged, the at the same time to each input of the gate signal generating -Circuit (2 * 2) are connected «, with the other The input of the gate signal generating circuit (2 · 2) are connected via multiplexers (9 »δ) program switches (2 · 3); an exit of the circuit (2 * 2) is to an input of a display circuit (8,1) connected; one output of the aforementioned gate signal forming circuit (2.2) is each with connected to an input of a circuit (3 · 1) measuring the web speed, and to each input the program switches (3.2) are connected, which branch off from here on the one hand to an input of the Tarsignalbildenden-; Circuit (2 * 2) «. On the other hand via an electronic Switch (4 * 3) to an input of an arithmetic circuit (4 »l) are connected; the other inputs of the arithmetic 3§ schsr? Circuit (4 »l) are via further multiplexers (4,4) with 809883/0591 a- connected to a program switch (4,2) «whereby the output of the arithmetic circuit (4.1) is connected on the one hand to an input of a further arithmetic circuit (5.1) and branching from here to an output of a waste following circuit (7.1) or via an electronic switch ( 9.6) is connected to an input of a step countdown circuit (6,1) - which is built into the motor control unit (6) - via a multiplexer (9 5) and to an input of the arithmetic circuit (5.1) via further multiplexers (9 · 5) the circuits (1 · 2) measuring the error characters and further program switches (5,2) are connected to the other input of the aforementioned arithmetic circuit via multiplexers (9,5); an output of the arithmetic circuit (5 * 1) is on the one hand to an input of the waste following circuit (7.1) ^ on the other hand via an electronic switch (9 6) to the input of the display device (8.1), while its other output to an input of a step down counter -Circuit (6.1) are connected via multiplexer (9.5); with the other input of the step countdown circuit (6.1) via an electronic switch (9.6) an output of the circuit (3 · 1) measuring the speed of the railway line is connected and the same outputs branching from here to one input of further step counters -Circuits (6,1) are connected; the outputs of the step down counter circuits are connected to the input of a stepping motor (6.2) while the other inputs of the same circuits are connected to limit switches (6.3) and to push button switches (6.4); A program switch (7.2) is connected to one input of the waste following circuit (7.1) to the other input - via multiplexer (9.5), further program switches (7 _e 3), and its outputs are connected to a device which ejects the waste. 2. Device according to claim 1, characterized * that an operation control circuit (9) is built into the device «the outputs of which to csn Stsusreiningang the functional units of the Ei.nric / r - /: 'ir: -2 z" £ -' ohl-csan are, vobex 809883/0591 the iiiiiyänye of the operation control circuit on the one hand with the, the register presetting determining switch (9.2) and with the control-determining switch (9.3) on the other hand via multiplexer (9.5) with the, the automatic operating mode setting switches (9 4) are connected 3 »Method for register presetting by means of the device described in claims 1-2, thereby characterized in that the rollers of the device adjusting the paper length - by continuing the stepping motor in a relative O-position, ζ · Β · in an end position are set and then with the help of the same device the integer quotient of the length of the paper path: between two adjacent printing units - according to the paper insert - and the circumference of the pressure roller used is calculated; when the "half of the value" K "of the holdover is less is, as that, by the mechanical dimensions of the device permissible setting option, a number of incremental pulses are sent to the stepper motor, whereby this number is equal to half of the calculated remainder: 2ü thereby the rollers that adjust the paper length are removed from the relative O-position set to the desired point and the pressure rollers are - according to the to be printed Bilde - mounted in an analog angular position in the printing units; if half of the leftover is larger than the mentioned setting option, then half of the value of the welzen circumference is deducted from the remnant and becomes a number of incremental pulses passed to the stepper motor, this number being half the waiting time is equivalent to; the pressure roller is accordingly - in proportion nis to the neighboring rollers - rotated by 180 ° and into the Printing unit mounted « 4 · Process for the automatic control of the image shift on rotary color printing machines by means of the Direction according to one of claims 1-2, characterized in that the "on the individual printing units depending on the roller 809883/0591 Λ. wiiiu. Γ, ΐι, ϋΗ) hes wr-hüu ie κ «s L Jeϊ Bi, 1 (JvB ₁ t» ehiebuilt} in öine common · * · «name ei f it.ruTiö ti see circuit is fed» then the i-'ijp.iei i angö modifying SA / er t - which is necessary to control the Ui .iu> / ers>oJiiei'Ufuj - calculated in such a way that from the ο bot ejider '// al ^ enuind rehung "n ^K tii deducted measured error value from the de üüi.! '-'Julzenumd relit mg "oi" measured error value Vd ₁₁ λubei üer difference with the previously mentioned value ^H K "mul ι j pi izifc rl and is to this result ** D ^M the result of a multiplication is added whose F- ^ ctors the value of, Xo at dor IValzenunidröhung "n-1" measured error and an expediently chosen constant " ⁴ P" are - the latter being proportional to the length of the track length, - then the stepper motor setting the paper length is advanced by means of a number of forward switching pulses that the half ib corresponds to the ijiiiuuifci pi D and the frequency of the impulses is proportional to the running speed of the paper. 5 _e process for the elimination of the defective üruckuauiieii "littels the device" according to one of claims 1-2a characterized that at each printing units each sine £ ij number of bunritischalt registers in which the i \ r, Ziä '\ l uu _ä register is equal to or greater than the previously calculated largest value "K ^M ; afterwards the series of these registers are inter alia one by the Insert of the paper in a certain order connected with each other in such a way that the output of a previous registor row to the input of a register "k" - rechna-i is connected in the opposite direction of the incrementing of the next stepping register row; the rows of registers connected to one another in this way are then incremented depending on one roller revolution and the value of the image shift measured after the jQ roller revolution is compared with the permissible error value which is set by those program switches that are assigned to the individual printing units; if the value of the image shift is greater than the set value, then the register K of a register _{row belonging to the given printing unit from n} becomes the basic position 809883/0591 upsetf the upside down state is considered to be a faulty one Press matter counted, and the outcome of the affiliated Register rows then reached »when the faulty printed matter runs out of your last printing unit», causing the ejection device is operated. 809883/0591