EP1347878A1

EP1347878A1 - Method for controlling a circumferential register in a web-fed rotary press

Info

Publication number: EP1347878A1
Application number: EP01997393A
Authority: EP
Inventors: Erhard Herbert GLÖCKNER; Reinhard Georg GRO
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2000-11-27
Filing date: 2001-11-21
Publication date: 2003-10-01
Anticipated expiration: 2021-11-21
Also published as: ATE363389T1; US20040020391A1; DE50112577D1; DE10058841B4; DE10058841A1; AU2002218991A1; EP1347878B1; WO2002042075A1; WO2002042075B1; US6766737B2

Abstract

The invention relates to a method for controlling a circumferential register in a web-fed rotary press, according to which an actual value pertaining to a tension (51-55) of a web (03) passing through the printing units (04, 06, 07, 08) is determined, and an angular position and/or an angular velocity of a cylinder (12, 16) of a first printing unit (04) with regard to a cylinder of a second printing unit (06) is changed according to this determined tension. The correction of a register offset ensues without controlling the tension (51-55) and without the use of an optical recognition system by determining the value of the necessary change for the angular position (deltaphi) and/or the angular velocity (deltaphi) as a function of the measured tension (51-55) of the web (03).

Description

description

METHOD FOR CONTROLLING A CONTINUOUS REGISTER IN A ROLL ROTATION PRINTING MACHINE

The invention relates to methods for regulating a circumferential register according to the preamble of claims 1, 3, 5 or 10.

EP 0951 993 A1 discloses regulation of the transverse and longitudinal registers, the correction of the transverse register being carried out by means of a pull roller. A change in the longitudinal expansion is determined via web speeds and other parameters, such as stress-strain diagram and tension setpoints, and is attributed to control devices for cylinders of the printing units and / or an actuator for setting and correcting the cutting register.

WO 00/34042 discloses a method for controlling a register, wherein a deviation of a web tension from a target value changes a speed and / or angular position of a first pressure point relative to a second pressure point.

EP 0 950519 A1 shows a method for regulating the cut and color register of several webs to one another and between the individual printing units. Strains are determined on the basis of the operating points of the drives for the transport rollers, the cylinders and traction rollers used, and correction variables calculated therefrom are added to the reference variables for the cutting register or the color register as position offset.

The invention has for its object to provide methods for regulating a circumferential register.

The object is achieved by the features of claims 1, 3, 5 or 10 solved.

The advantages that can be achieved with the invention consist in particular in that an error in the circumferential register due to voltage fluctuations or fluctuations in the scope of printing cylinders, e.g. B. caused by short-term changes in a thickness of the web, is counteracted without great effort and control. The error to be corrected can be a misalignment (error in the so-called color register) or a register error between the two sides of the printed web. A difference in the transport speed of the web that occurs between two pressure points is corrected by changing the relative rotational position of the pressure points to one another.

It is a great advantage that it is possible to dispense with complex measurements and controls using color marks applied to the web. In order to correct the circumferential register, there is neither a direct measurement of the elongation, nor a voltage regulation or torque regulation by means of the operating points of the drives after the printing unit.

The method and a corresponding device can be used particularly advantageously for register misalignment in printing units with a plurality of double printing units arranged one behind the other or one above the other in rubber-against-rubber operation, such as, for. B. with a so-called H-printing unit composed of eight printing tower, with at least two of the printing points printing in succession on the same side of a web.

For four-high towers consisting of two H-printing units, it is particularly advantageous to evaluate the change in the tension of the web over time (e.g. before and after passing through a gluing point of the web) behind the last printing unit or the last printing unit and only one change Angular position of the first H printing unit in the running direction of the web relative to the second H printing unit. This is general Regulation of the circumferential register, in particular the color register, advantageous for several, e.g. B. at least three successive printing units traversed by a web, a distance between the first two nips being significantly smaller than a subsequent distance from a third nip. The eight-high tower consisting of two H printing units is an example of this.

In printing machines which have satellite printing units, the method can be used advantageously to regulate the register between the two sides of the web.

In one embodiment, it is particularly advantageous that a change in the voltage over time after the last printing unit, i. H. a difference in the voltage at a first and a second point in time, is used directly and linearly to correct the register offset of the second H-printing unit relative to the first. This requires extremely little measurement and control effort with sufficient accuracy.

Advantageously, voltage regulation, e.g. B. by means of a torque-controlled pull roller behind the printing tower. An uncontrolled pull roller with a controlled speed is sufficient here. A z. B. register offset caused by an adhesive is corrected in an advantageous embodiment exclusively via the circumferential register of the cylinder, in particular the cylinder of the first printing unit or the first two printing units. In particular, the first two printing units, for example as an H printing unit, can be controlled jointly, so that only a single correction variable is determined and a single correction has to be carried out.

An embodiment of the invention is shown in drawings and will be described in more detail below. Show it:

Figure 1 is a schematic representation of a printing unit with roll changer.

Figure 2 is a schematic representation of the voltage as a function of time when passing an adhesive point.

Fig. 3 is a schematic representation of a correction variable or change in the angle of rotation as a function of time.

For example, a web-fed rotary printing press has one. Aft tower 01 and a reel changer 02. From the roll changer 02 runs a web 03, z. B. a paper web 03, for example via a feed mechanism, not shown, through the aft tower 01.

The aft tower 01 has a total of four printing units 04; 06; 07; 08, synonymous with four clamping points 04; 06; 07; 08, on. In the example, these printing units 04; 06; 07; 08 as double printing units 04; 06; 07; 08 executed and work in rubber-against-rubber mode while pressing. Two of the printing units 04; 06 are within a first, in the example lower H-printing unit 09, and the other two printing units 07; 08 arranged within a second, in the example upper H-printing unit 11. Each of the printing units 04; 06; 07; 08 has at least 3, in the example four cylinders 12; 13; 14; 16, e.g. B. a first forme cylinder 12, a cooperating with the first forme cylinder 2 transfer cylinder 13, a with the transfer cylinder 13 via the paper web 03 cooperating impression cylinder 14, and, if the impression cylinder 14 is designed as a second transfer cylinder 14, one with this interacting second forme cylinder 16. Each of the printing units 04; 06; 07; In the example, 08 has at least one drive motor 17; 18; 19; 21 on. However, each cylinder 12; 13; 14; 16 each printing unit 04; 06; 07; 08 or each pair of transfer cylinders 13; 14 and forme cylinder 12; 16 together have a drive motor. However, it is also possible for the lower H-printing unit 09 to use a drive motor 17; 18 and the upper H-printing unit 11 by means of a drive motor 19; Form 21 driven drive system. A pull roller 22 is arranged after the last printing unit 08. A feed mechanism 23 (symbolized by a pull roller) is arranged between the roll changer 02 and the first printing unit 04. The printing units 04, 06; 07, 08 are assigned inking units (not shown) and, if necessary, dampening units.

In the course of the paper web 03 from the roll changer 02 to behind the last printing unit 08 of the eight-high tower 01, as seen in the paper running direction, there are tensions S1; S2; S3; S4; S5 before. In front of the aft tower 01 is the voltage S1, z. B. S1 between 30 and 50 daN / m, between the printing units 04 and 06 the voltage S2, between the first H-printing unit 09 and the second H-printing unit 11 the voltage S3, between the printing units 07 and 08 the voltage S2 and after the last printing unit 06, the voltage S5, z. B. S5 between 10 and 20 daN / m, in particular from 12-15 daN / m. However, the exact levels and the exact differences depend on the water sensitivity of the paper used. The significantly higher level of voltage S1 compared to S5 is essential. The voltage S1 is regulated, for. B. by means of the feed mechanism 23rd

During the passage through the eight-high tower 01, the paper web 03 changes its tension-elongation characteristic due to moisture (color, possibly dampening solution). The stress levels before and after the aft tower 01 are advantageously selected such that an elongation before and after the aft tower 01 is approximately the same. The voltage S1 is usually higher than the voltage S5. If there is now a change of a roll in the roll changer 02, in particular a flying change by means of adhesive, during stationary production conditions, an adhesive point with the paper web 03 runs from the roll changer 02 through the aft tower 01. B. an area on which two layers of paper web 03 and an adhesive layer, for. B. includes an adhesive strip. A so-called adhesive flag, ie an area of two-ply paper, can extend far beyond the width of the adhesive point. The paper web 03 thus has an area 24 with a greater thickness, which moves through the printing press.

The area 24 of greater thickness now passes through a printing unit 04; 06; 07; 08, because of the increased thickness and the fixed center distance of the cooperating cylinders 13; 14 an elastic support on the cylinders 13; 14, e.g. B. rubber blankets, slightly compressed. If the angular velocity remains the same, the peripheral speed of the cylinders 13 decreases; 14. For example, the higher peripheral speed is still present in the printing unit 07, while at the same time the peripheral speed in the printing unit 06 is reduced when passing through the area 24. Between the printing units 04; 06; 07; 08 and after the aft tower 01, the level of the voltages S2 increases suddenly; S3; S4, S5 (Fig. 2 for the voltage S5).

With the increased level in voltages S2; S3; S4; S5 goes hand in hand with an increased level for the stretching of the paper web 03 and thus causes between the individual printing units 04; 06; 07; 08 an offset ΔP in the circumferential direction, a so-called register offset ΔP in the circumferential register.

The sudden increase in voltages S2; S3; S4; S5, and thus the strain, depends on the original levels of the stresses S1; S2; S3; S4; S5, in particular a difference between S1 and S5, and on the length of the adhesive tail, ie on the length of the region 24 of greater thickness. The latter in particular in the case of staggered cylinders, ie several channels on one lateral surface of the cylinder are arranged side by side in the axial direction, but offset from one another in the circumferential direction. In this case, if the length of the adhesive tail is greater than or equal to the distance between the channels in the circumferential direction, partial relief can take place.

The sudden increase in voltage S2; S3; S4; S5, in particular the voltage S5 from a setpoint S-Soll behind the eight-tower 01 z. B. determined by a difference ΔS (FIG. 2) before and after passing through area 24 and processed further.

On the basis of this difference ΔS, a correction quantity K is formed, and the register offset ΔP that occurs between two printing units 04; 06; 07; 08 or between two H-printing units 09; 11 corrected. This compensation takes place i. d.R by a relative change Δφ of an angular position φ, z. B. the angular position φ, the H-pressure units 09; 11 or the cylinder 12; 13, 14; 16 of the printing units 04; 06; 07; 08 to each other.

In the example, the voltage S5 is measured using a measuring device 26, e.g. B. a sensor 26 such. B. a measuring roller 26, after the four-high tower 01, here following a catch roller 28, determined and given to the control device 27, a computer 27 or to the control center computer 27. From the difference ΔS, the control device 27 or the computer 27 determines the average correction variable K between the lower H-printing unit 09 and the upper H-printing unit 11. The angle of rotation position φ of the lower H-printing unit 09, in particular that of the forme cylinder 12; 16 of the printing units 04 and 06, is now made by a corresponding change Δφ in the angle of rotation φ relative to the lower H printing unit 09, in particular its forme cylinder 12; 16, rotated and thus the misalignment ΔP that has occurred is corrected. Since in the example no tension control by means of the pull roller 22 or another device, such as. B. a dancer roller, behind the last printing unit 08 up to and including the drawing roller 22, the voltage S5 drops with further transport of the paper web 03 through the printing units 04; 06; 07; 08 slowly. During the drop, the circumferential register is then readjusted in the opposite direction by means of the correction variable K in accordance with the changing difference ΔS between S5 and S-soll (FIG. 3). This is advantageously not carried out continuously but at suitable intervals.

In the present exemplary embodiment for the eight-high tower 01, no correction is made between the two neighboring, the same H-printing unit 09; 11 assigned printing units 04; 06 or 07; 08, but only a relative angle of rotation position φ between the lower and upper H-printing unit 09; 11 is taken into account as a change Δφ in the angular position φ. Here, 04; 06, at least one, for double printing units 04; 06 at least two, cylinders 12; 13; 14; 16, advantageously each the forme cylinder 12; 16 changed in their relative angle of rotation position φ. The deviation between that of a single H-printing unit 09; 11 assigned printing units 04; 06 or 07; 08 lies, especially for newspaper printing, within the permissible tolerances for the deviation in the register.

In general, the described regulation of the circumferential register is advantageous for at least three printing units 04; 06; 07; 08, with a distance a1 (z. B. 0.4 m to 1 m) between the two first clamping points 04; 06 is significantly smaller than a subsequent distance a2 (eg> 1 m) to a third clamping point 07. The eight-high tower 01 consisting of two H-printing units 09; 11 is an example of this. In particular on the way between the first two printing units 04; 06 is a moisture influence, and thus a voltage-related register offset ΔP is low, so that the regulation for the first two printing units 04; 06 in the same way relative to the upper printing units 07; 08, and not additionally relative to each other. Between the two printing units 07; 08 the upper H printing unit 11 is again followed by a shorter distance a3 (e.g. 0.4 m to 1 m). A relative change only occurs on printing units 04; 06 with a large distance a2 to one subsequent printing unit 07.

The regulation of the correction of the register offset ΔP by means of the correction variable K as a function of the difference ΔS from the initially spontaneously increasing and subsequently decreasing change in the voltage S5 by a difference ΔS is preferably carried out as a proportional control, with the difference ΔS between the voltage S5 and the Correction variable K advantageously a linear relationship is established. The control device 27 is designed in an advantageous embodiment as a proportional controller 27.

Correction quantity K suffices (in the range of voltages S56ΔS to be considered here) in an advantageous embodiment approximately the equation K = a * ΔS, where a represents the slope and no constant element has to be taken into account. The slope a for the regulation of the lower H-pressure unit 09 compared to the upper H-pressure unit 09 for the eight-high tower 01 under consideration lies between 1 / (35 daN / m / mm) and 1 / (45 daN / m / mm), in particular at approx. 1 / (40 daN / m / mm) if the difference ΔS of the tension S5 in daN / m and the correction quantity K of the register offset ΔP on the circumference of the cylinder 12; 13; 14, 16 are measured in mm.

For example, for a cylinder diameter of approx. 230 mm, a measured difference ΔS of the tension S5 is 10 daN / m, the angle of rotation position φ for the lower H-pressure unit 09 is corrected relative to the upper H-pressure unit 11 in such a way that an offset on the circumference of the modified cylinder 12; 13; 14; 16 by about 0.25 mm. The change Δφ in the angle of rotation position is proportional to the correction value K and the register offset ΔP. The change Δφ in the angle of rotation position via a constant c taking into account the circumference of the respective cylinder (12; 13; 14; 16) is also linearly related to the difference ΔS, so the value for the change in the relative angle of rotation position Δφ = a * c * .DELTA.S. The relative change .DELTA..phi. Is, for example, approximately 0.12.degree.-0.13.degree. For the above cylinder. Instead of the change Δφ the angle of rotation position the angular velocity Aφ can also be changed for a certain time.

There is a different dependency of the correction to be taken into account for different qualities of the paper web 03, so that preferably a quality quantity Q or also a quality function Q for taking into account the type of paper web 03 present (moisture behavior and / or stress-strain characteristics, etc.) of the dependency mentioned is to be overlaid. The desired correction by the correction variable K or the change Δφ in the angle of rotation position φ or

Angular velocity Aφ is therefore a function of the voltage S5 or the difference

ΔS, the circumference of the cylinder 12 to be corrected; 13; 14; 16 and the quality size Q.

In a preferred embodiment, the register offset ΔP is corrected only by means of the register adjustment. A voltage regulation in the area of the voltage S5 behind the last printing unit 08 does not take place in this context. In a preferred embodiment, the pull roller 22 is designed as a pull roller 22 controlled with respect to its speed, to which neither tension values nor torque values have to be traced. The measured voltage S5 is advantageously used to regulate the voltage S1 (shown in dashed lines in FIG. 1) in order to meet the demand for the above-mentioned. Condition to meet a larger voltage S1 compared to S5.

Particularly suitable is the method and a corresponding device for regulating the circumferential register for the correction of the register offset ΔP, which occur during the stationary printing operation as short-term disturbances, for example due to the flying change of paper rolls of the same quality. After this disruption, there are usually stationary conditions and the same paper quality. In an advantageous embodiment, each of the cylinders 12; 13; 14; 16 each printing unit has its own drive motor 17; 18; 19; 20 on. However, all drive motors 17; 18 one of the two printing units 04; 06 or all drive motors 17; 18 of the two lower printing units 04; 06 corrected by the same value at the same time. For each pairwise drive of a forme cylinder 12; 16 with the associated transfer cylinder 13; 14 the above is to be applied accordingly.

The method for regulating the circumferential register is also for configuration of the printing press other than the eight-high tower 01 with at least two printing units 04; 06; 07; 08 suitable if these several clamping points 04; spaced apart from one another in the running direction of the paper web 03; 06; 07; 08 or printing units 04; 06; 07; 08 or pressure points 04; 06; 07; 08 has.

This can be, for example, a printing press, which is a plurality of bridge printing units arranged one above the other or a plurality of standing rubber-to-rubber printing units arranged side by side with the paper web 03 being guided horizontally. Likewise, for each of the examples mentioned, the respective first transfer cylinder 13 can also interact with an impression cylinder 14 designed as a steel cylinder 14. Here, too, the voltage S5 is measured after the last printing unit 08, and the printing units 04; 06; 07 regulated by means of the difference ΔS or the voltage S5. This can again be done in groups with several successive printing units 04; 06 or also with individual printing units 04; 06; 07 happen. The printing units 04; 06; 07 are always regulated against the unchanged last printing unit 08. Between the first and the second printing unit 04; 06, as a rule, no relative change has to be made due to the incomplete wetting.

In addition to the register or color register, ie the exact relative position of two successively printed images, generally of different colors, printed on the same side of the web 03, in an embodiment not shown, the method is equally suitable for regulating the register between the two sides of the web 03 printed in succession. This is, for example, for the arrangement of two satellite printing units 09; each having one or more printing points; 11 an advantage. The satellite printing units 09; 11, e.g. B. as a so-called. Nine-cylinder satellite or ten-cylinder satellite, are traversed by the web 03 one after the other, in one of the printing units 09; 11 one side of the web 03, and then in the other printing unit 11; 09 the other side of the web 03 is printed in one or more colors.

A measurement and evaluation of the difference ΔS in the voltage S2; S3; S4; S5 can also be used between the individual terminal points 04; 06; 07; 08 take place and a change in the rotational position of the preceding clamping points 04; 06; 07; 08 can be effected.

In the case of larger differences ΔS within a larger voltage range for the voltages S2; S3; S4; S5 can A non-linear relationship between the difference ΔS and the required correction of the register offset ΔP by the correction variable K may also be used. A corresponding functional relationship can, however, also be taken into account in the control device 27 in this case in a simple manner.

LIST OF REFERENCE NUMBERS

01 aft tower

02 reel changer

03 web, paper web

04 printing unit, clamping point, double printing unit, printing point;

05 -

06 printing unit, clamping point, double printing unit, printing point;

07 printing unit, clamping point, double printing units, printing point;

08 printing unit, clamping point, double printing units, printing point;

09 H printing unit, lower, first

10 -

11 H printing unit, upper, second

12 cylinders, form cylinders

13 cylinders, transfer cylinders

14 cylinders, impression cylinders, transfer cylinders, steel cylinders

15 -

16 cylinders, form cylinders

17 drive motor (04)

18 drive motor (06)

19 drive motor (07)

20 -

21 drive motor (08)

22 traction element, traction roller

23 feed mechanism

24 area of greater thickness (03)

25 -

26 Measuring device, sensors, measuring roller

27 Control device, computer, control center computer, proportional controller 28 capture roller

a1 distance (04; 06) a2 distance (06; 07) a3 distance (07; 08)

K correction quantity

Δφ change in the angular position

Aφ change in angular velocity

S1 voltage

S2 voltage

S3 voltage

S4 tension

S5 tension

S setpoint

ΔS difference

Claims

Expectations

1. A method for regulating a circumferential register in a web-fed rotary printing press with at least two printing units (04; 06; 07; 08) through which a web (03) passes in succession, an actual value of a tension (S5) of the web (03) being determined and depending on this voltage (S5) one

Angular position (Δψ) and / or an angular velocity (Δ ^) at least one

Cylinder (12; 13; 14; 16) of a first printing unit (04; 06; 07; 08) relative to

Angular position (Δφ) and / or angular velocity (Δ ^) of at least one cylinder

(12; 13; 14; 16) of a second printing unit (04; 06; 07; 08) is regulated, characterized in that the tension (S5) behind one of the last printing units (08) in the production direction is determined, and that depending This voltage (S5) is used to regulate the angular position (Δφ) and / or the angular velocity (Δ ^) on a printing unit (04; 06; 07) arranged in front of the last printing unit (08) in the production direction.

2. The method according to claim 1, characterized in that a difference (ΔS) from the measured voltage (S5) with a target value (S target) is formed, and that the angular position (Δφ) and / or the angular velocity (Δ ^ J) is changed depending on this difference (ΔS).

3. A method for regulating a circumferential register in a web-fed rotary printing press with at least two printing units (04; 06; 07; 08) which are passed through successively by a web (03), an actual value of a tension (S5) of the web (03) being determined and a difference (ΔS) with a target value (S-target) is formed, and based on this difference (ΔS) an angular position (Δφ) and / or an angular velocity (Δ ^) of at least one cylinder (12; 13; 14; 16) one first printing unit (04; 06; 07; 08) is regulated relative to at least one cylinder (12; 13; 14; 16) of a second printing unit (04; 06; 07; 08), characterized in that the value for the required change the angular position (Δφ) and / or the angular velocity (Δ ^) is formed as a function of a quality of the web (03).

4. The method according to claim 3, characterized in that the voltage (S5) behind the last printing unit (08) in the production direction is determined.

5. A method for controlling a circumferential register in a web-fed rotary printing press with at least two printing units (04; 06; 07; 08) which are passed through successively by a web (03), an actual value of a tension (S5) of the web (03) being determined and a difference (ΔS) is formed with a target value (S target), and by means of this difference (ΔS) an angular position (Δφ) and / or an angular velocity (Δ ^) of at least one cylinder (12; 13; 14; 16) a first printing unit (04; 06; 07; 08) is regulated relative to at least one cylinder (12; 13; 14; 16) of a second printing unit (04; 06; 07; 08), characterized in that the difference ( ΔS) of the voltage (S5) behind the last printing unit (08) in the production direction is determined.

6. The method according to claim 1, 3 or 5, characterized in that, depending on the voltage (S5), the angular position (Δφ) and / or the angular velocity

(Δ ^) at least one cylinder (12; 13; 14; 16) of the first printing unit (04) is changed in the production direction.

7. The method according to claim 1, 3 or 5, characterized in that depending on the voltage (S5) angular positions (Δφ) and / or angular velocities

(Aφ) of cylinders (12; 13; 14; 16) of the first two printing units (04; 06) in to be changed.

8. The method according to claim 7, characterized in that the change in the angular position (Δφ) and / or the angular velocity (Δ ^) for the two printing units (04; 06) takes place by the same value.

9. The method according to claim 2, 3 or 5, characterized in that angular positions (Δφ) and / and angular speeds (^) of cylinders (12; 13; 14; 16) of the two in the direction of production of the web (03) first, and as first H-printing unit (09) designed printing units (04; 06) simultaneously and by the same value depending on the difference (ΔS) in the tension (S5) behind the printing units (07; 08) designed as second H-printing unit (11) ) can be changed.

10. Method for regulating a circumferential register in a web-fed rotary printing press with a first printing unit (09) having at least one printing point (04, 06; 07, 08) for at least one side of the web (03), and a second, several printing point (07, 08 ; 04, 06) for the same or / and the other side of the web (03) having a printing unit (11), an actual value of a tension (S5) of a web (03; 11) passing through the printing units (09) in the production direction is determined after the last pressure point, characterized in that a difference (ΔS) is formed between the voltage (S5) and a target value (S target), that an angular position (Δφ) or / and an angular velocity (Δ ^) of at least two cylinders (12; 13; 14; 16) of the first printing unit (09) having a plurality of pressure points (04, 06; 07, 08) relative to the angular position (Δφ) and / or angular velocity ( ^) at least one cylinder (12; 13; 14; 16) the second several pressure points (07, 08; 04, 06) having a pressure unit (11) is regulated, and that the angular positions (Δφ) and / or the angular velocities (Δ ^) of the cylinders (12; 13; 14; 16) to be regulated of the first printing unit (09) having a plurality of pressure points (04, 06; 07, 08) are all around same value can be changed.

11. The method according to claim 1, 3, 5 or 10, characterized in that by means of the method, the peripheral register of a two H-printing units (09; 11) having web printing machine is regulated.

12. The method according to claim 10, characterized in that by means of the method, the circumferential register of a web printing press having two satellite printing units (09; 11) is regulated.

13. The method according to claim 2, 5 or 10, characterized in that the value of the required change for the angular position (Δφ) and / or the angular velocity (Δ ^) as a function of the difference (ΔS) in the voltage (S5) and one Quality of the web (03) is determined.

14. The method according to claim 2, 3, 5 or 10, characterized in that the value for the change in the angular position (Δφ) and / or the angular velocity (Δ ^) by means of a linear relationship between the difference (ΔS) of the voltage (S5 ) and the change in the angular position (Δφ) and / or the angular velocity (Δ ^) is formed.

15. The method according to claim 1, 3, 5 or 10, characterized in that a tension (S1; S2; S3; S4; S5) on the way from a reel changer (02) to the traction element (22) only between the reel changer ( 02) and the first printing unit (04) is regulated.

16. The method according to claim 1, 3, 5 or 10, characterized in that the Voltage (S1) before the first printing unit (04) is set at least 10 daN / m higher than the voltage (S5) behind the last printing unit (08).

17. The method according to claim 1, 3, 5 or 10, characterized in that a correction of a register offset (ΔP) during stationary production operation without regulation of the voltage (S2; S3; S4; S5) and without an optical detection system only via the functional connection with the tension (S5) behind the last printing unit (08) and possibly a quality of a web (03).

18. The method according to claim 1, 3, 5 or 10, characterized in that a traction roller (22) arranged behind the last printing unit (08) is regulated to a constant speed.

19. The method according to claim 2, 3, 5 or 10, characterized in that after spontaneously increasing the voltage (S5), first a change in the angular position (Δφ) and / or the angular velocity (Δ ^) corresponding to the difference (ΔS) in one in the first direction, and then with a decrease in the difference (ΔS) there is a change in the opposite direction.