EP1763411B1 - Method and device for measuring and adjusting the evenness and/or tension of a stainless steel strip or stainless steel film during cold rolling in a 4-roll stand, particularly in a 20-roll sendzimir roll stand - Google Patents

Abstract

A method and device for measuring and adjusting the evenness and/or tension of a stainless steel strip (1) during cold rolling in a 4-roll stand (2) provided with at least one control loop (4) comprising several actuators (3), resulting in more precise measurement and adjustment due to the fact that an evenness defect (10) is determined by comparing a tension vector (8) with a predefined reference curve (9), whereupon the characteristic of the evenness defect (10) along the width of the strip is broken down into proportional tension vectors (8) in an analysis building block (11) in a mathematically approximated manner and the evenness defect proportions (C1 . . . Cx) determined by real numerical values are supplied to respectively associated control modules (12a; 12b) for actuation of the respective actuator (3).

Description

The invention relates to a method and a device for measuring and regulating the flatness and / or the strip tensions of a stainless steel strip or a stainless steel foil during cold rolling in a multi-roll stand, in particular in a 20-roll Sendzimir rolling mill, with at least one control loop comprising a plurality of actuators. wherein the actual strip flatness in the outlet of the multi-roll stand is measured via a flatness measuring element due to the band-voltage distribution over the bandwidth.

Such multi-roll stands consist of split-block or monoblock design, wherein the upper and lower sets of rolls can be made independently and can result in different stator frame.

The initially mentioned method is known from EP 0 349 885 B1 and comprises the formation of measured values which characterize the flatness, in particular the tensile stress distribution, are actuated on the exit side of the rolling stand and in dependence therefrom actuators of the rolling mill which belong to at least one control circuit for the flatness of the rolled sheets and strips. In order to reduce the different time behavior of the actuators of the rolling mill, the known method provides for adapting the speeds of the different actuators to each other and for uniforming their travel ranges. However, this does not detect other sources of error.

Another known method ( EP 0 647 164 B1 ), a method for obtaining the input signals in the form of nip signals, for control members and regulators for actuators of the work rolls, measures the stress distribution across the strip material, the planarity errors being taken from a mathematical function by minimizing the squares of the deviations is determined by a matrix, with the number of measurement points, the number of lines, the number of basis functions and the number of roll gaps in the measurement points. This procedure also does not take into account the flatness errors that occur in practice and their occurrence.

The invention has for its object to achieve due to the more accurately measured and analyzed flatness errors a changed control behavior of the respective actuators, thereby achieving a higher flatness of the final product, so that the rolling speed can be increased.

The stated object is achieved by a method with the features of claim 1 in combination. The advantages are ensuring a stable rolling process with a minimum stripper rate and thus an increase in the possible rolling speed. In addition, the operator is relieved by the automatic adaptation of the flatness actuators to changing conditions, even in case of errors. Furthermore, a consistent product quality is achieved regardless of the qualifications of the staff. Furthermore, the calculation of the influence functions and a calculation of the control functions can be done in advance in a time-saving manner. The flatness control system as a whole becomes robust against inaccuracies in the calculated control functions. The inaccuracies remain without influence commissioning. The most important components of the flatness error are eliminated with the maximum possible control dynamics. The orthogonal components of the voltage vectors are linearly independent of each other, whereby a mutual influence of the components is excluded. The scalar flatness error components are fed to the individual control modules.

In an embodiment of the invention, it is provided that the profile of the flatness error is approximated over the bandwidth by a Gaussian approximation 8th order (LSQ method) and then decomposed into the orthogonal components.

An improvement of the invention is provided by analyzing a residual error vector and switching the residual error vector directly to selected actuators. All flatness errors remaining after the highly dynamic compensation process, which can be influenced by the given influence functions, are eliminated by the residual error removal within the available setting range. It is therefore advantageous, in addition to the abovementioned orthogonal components of the flatness error, to also take into account a residual error which is not fed to the described orthogonal components but directly to the actuators.

After further steps, the assignment of the residual error vectors can be done by weighting functions, which are derived from the influence functions of eccentric actuators and assign the entire upcoming flatness error to the individual eccentrics.

In this case, it is further advantageous that a residual variable determined by real numerical values is formed by summing up the residual error vectors assigned to the eccentrics.

Another development provides that the control for the strip edges is performed separately within the flatness control. This can be a Such regulation may also be switched off completely if it is not absolutely necessary.

A further improvement is that the horizontal displacement of the inner intermediate rollers is used as the actuator for the edge tension control.

For this purpose, an improvement is proposed in that via the edge tension control a predetermined belt tension in the range of one to two outermost covered zones of a flatness measuring roll is set separately for each band edge.

Other features provide that the edge voltage control is selectively operated asynchronously or synchronously for the two band edges.

In this case, the controlled variable for the edge tension control can be determined separately for each band edge by forming the difference between the control differences of the two outermost measured values of the flatness measuring roll.

According to the cited prior art, the device for measuring and regulating the flatness and / or strip tension of a stainless steel strip or a stainless steel foil for the Kalzwalzbetrieb in a Vielwalzengerüst, in particular in a 20-Walzen-Sendzimir rolling mill, with at least one control loop for actuators, consisting of hydraulic adjusting means, from eccentrics of the outer support rollers, axially displaceable inner cone intermediate rollers and / or their influence functions.

The object stated in the introduction is therefore achieved in terms of device technology by a device having the features of claim 11 in combination.

As a result, the advantages associated with the method can be implemented in terms of apparatus.

A further improvement of the invention is that the comparison signal between the reference curve and the current band flatness is connected via the stand-alone analyzer to the independent third control module for a flatness residual error, whose output led to the coupling connection for the actuator from the eccentrics is.

A continuation of the invention in this sense training is that the comparison signal between the reference curve and the current Bandplanheit is connected via a third, third independent analyzer to an independent, fourth control module for the control of edge voltage control and its output to the actuator of the inner cone Intermediate rollers is connected.

Accurate signal generation is assisted by the fact that a flatness measuring element arranged in the outlet is connected to the signal line of the current strip flatness.

The further invention is designed in such a way that a dynamic single regulator is provided for each flatness error vector, which is provided as a PI controller with dead band in the input.

Another embodiment provides that each individual controller except the first Analsyengerät upstream of adaptive parameterization and a control display in parallel.

Furthermore, it is advantageous that connections for control parameters are provided on each individual regulator.

Furthermore, the dynamic individual controller can be connected to a control panel.

Another analogy to the method steps is that for residual error removal, the residual error vector cooperates with the control elements of the eccentric via residual-error control devices.

The independence of the measurements at the strip edges is solved device-technically in that the edge tension control provides an analysis device for different strip edge zones of the flatness measuring roll, to which two strip edge control devices are connected.

In a further development of this arrangement, the band edge controllers are connected to the actuators of the cone intermediate rollers.

As a result, the band edge controllers are independently switchable.

Finally, it is provided that an adaptive Verstellgeschwindgkeits control means and a control display are connected to the two band edge controllers.

In the drawings, embodiments of the invention are shown, which are explained in more detail below.

Fig. 1

eine Anlagenkonfiguration eines 20-Walzen-Sendzimir-Walzwerks,

Fig. 2

als vergrößerten Ausschnitt die Walzensätze in Split-Block- Ausführung mit den Ortsbestimmungen für die Planheits-Stellglieder,

Fig. 3

ein Walzspalt / Bandbreite-Diagramm mit den Einfluss-Funktionen der Exzenter auf das Walzspaltprofil,

Fig. 4

ein Diagramm der Änderung des Walzspaltes über der Bandbreite für den Einfluss der Konus-Zwischenwalzen-Verschiebung,

Fig.5A

ein Diagramm zum Planheits-Restfehler (Bandspannung über der Bandbreite),

Fig. 5B

ein Diagramm der Zuordnung des Planheits-Restfehlers zu den ein- zelnen Exzentern,

Fig. 6

ein Übersichts-Blockschaltbild der Planheits-Regelung zum 20- Walzen-Sendzimir-Walzwerk,

Fig. 7

ein strukturelles Blockschaltbild zur Cx-Regelung,

Fig. 8

ein Blockschaltbild zur Struktur der Restfehlerbeseitigung und

Fig. 9

ein Blockschaltbild zur Struktur der Kantenspannungsregelung.

Show it:

Fig. 1

a plant configuration of a 20-roll Sendzimir mill,

Fig. 2

as an enlarged detail the roller sets in split-block design with the local provisions for the planarity actuators,

Fig. 3

a roll gap / bandwidth diagram with the influence functions of the eccentric on the roll gap profile,

Fig. 4

a diagram of the change of the roll gap over the bandwidth for the influence of the cone intermediate roll displacement,

5A

a planarity residual error (band tension over the bandwidth),

Fig. 5B

a diagram of the assignment of the flatness residual error to the individual eccentrics,

Fig. 6

an overview block diagram of the flatness control for the 20-roller Sendzimir rolling mill,

Fig. 7

a structural block diagram for Cx control,

Fig. 8

a block diagram of the structure of the residual error removal and

Fig. 9

a block diagram of the structure of the edge tension control.

According to Fig. 1 For example, the stainless steel strip 1 or a stainless steel foil 1 a is rolled in a multi-roll stand 2, a 20-roll Sendzimir rolling mill 2 a by rolling, rolling and rolling. The roller sets 2b form a split-block design. The upper roller set 2b can be adjusted via an actuator 3 and other functions. In a control circuit 4 ( Fig. 6-9 ) are processed yet-descriptive signals. These signals originate before the rolling process from an inlet 5a and after rolling from an outlet 5b and are obtained via flatness measuring elements 6, which consist in the embodiment of flatness measuring rollers 6a.

In Fig. 2 For the upper roller set 2b as an actuator 3, a hydraulic adjusting means 17 is shown. To influence the band flatness are as actuators 3 pivoting of the hydraulic adjusting means 17 (only applied to the split-block design), an eccentric actuator 14 of the outer support rollers 18 (A, B, C, D, of which the support rollers A and D, for example, equipped with an eccentric 14 a) and an axial displacement of inner cone intermediate rollers 19 are available.

The positioning behavior of the eccentric employment is characterized by the so-called "influence functions". Two or more of the outer support rollers 18 are each provided with four to eight over the bale width arranged eccentrics 14a, which can be rotated by means of a respective hydraulic piston-cylinder unit, whereby the roll gap profile can be influenced. The inner cone intermediate rollers 19, which are horizontally displaceable by means of a hydraulic displacement device, have a conical grinding in the region of the band edges 15. The ground joint is located at the two upper cone intermediate rolls 19 on the operating side of the cluster roll stand 2, in the lower cone intermediate rolls 19 on the drive side (or vice versa). Thus, by synchronously moving each of the two upper and lower intermediate cone rollers 19, the voltage at one of the two band edges 15 can be influenced.

In Fig. 3 is for each of the eight adjustable eccentric 14a of the embodiment, the associated change in the roll gap profile between the band edges 15 within the bandwidth 7 indicated.

Corresponding influence functions which describe the influence of the cone intermediate roll displacement position on the roll gap profile are in Fig. 4 also indicated over the bandwidth 7 to the band edges 15. The decomposition of the flatness error vector into orthogonal polynomials of the stress σ (x) results in corresponding analysis to C1 (1st order), C2 (2nd order), C3 (3rd order), and C4 (4th order) in N / mm ² .

An assignment of residual errors to the individual eccentrics results from Fig. 5A as planarity residual error 26 (remaining after control by the Cx control) with the band tension (N / mm ² ) over the bandwidth 7 between the band edges 15 and in Fig. 5B For example, the weighting functions for evaluating the flatness residual error 26 for the individual eccentrics 14a, depending on the bandwidth 7 between the band edges 15, are shown.

The procedure is over Fig. 6 can be seen: The current band flatness is measured in the outlet 5b of the cluster roll stand 2 on the flatness measuring roller 6 based on the band voltage distribution (discrete band voltage measurements over the bandwidth 7) and stored in a voltage vector 8. A subtraction from the reference curve 9 (setpoint curve) to be specified by the operator results, after calculation, in the voltage vector 8 of the flatness error 10 (control difference). The course of the flatness error 10 over the bandwidth 7 is approximated in an analysis module 11 by a Gaussian approximation (LSQ method) of the 8th order and then decomposed into the orthogonal components, C1... Cx. The orthogonal components are linearly independent of each other, whereby a mutual influence of the components is excluded. The scalar flatness error components C1, C2, C3, C4 and, if necessary, further, are supplied to a first and second control module 12a and 12b via a first analyzer 11a. Accordingly, the second and third analyzers 11b and 11c are connected to the control modules 12c and a fourth control module 12d.

In detail, the sequence is as follows: A comparison signal 20 between the reference curve 9 and the current band flatness 22 of the flatness measuring element 6 at the input 23 of the control circuit 4 is connected to a first analyzer 11 a and an independent, first control module 12a for the formation of the voltage vectors 8 (C1 ... Cx) and the output 24 to the respective actuator 3 for the hydraulic adjusting means 17 of Roller set 2b connected. Output signals of the first analyzer 11a continue to reach the second control module 12b. The calculation result (f), from control functions 21, is forwarded via a coupling connection 25 to the actuator 3 of the eccentric 14a. The comparison signal 20 between the reference curve 9 and the current Bandplanheit 22 is connected via the stand-alone analyzer 11 b to the independent, third control module 12c for the flatness residual error 26 whose output 27 to the coupling port 25 for the actuator 3 from the eccentrics 14a is guided.

Furthermore, in Fig. 6 shown that the comparison signal 20 between the reference curve 9 and the current Bandplanheit 22 via a third, third independent analyzer 11 c connected to a separate, fourth control module 12d for controlling an edge voltage control 16 and its output 28 to the actuator 3 of the inner cone Intermediate rollers 19 is connected. In the outlet 5b, a flatness measuring roller 6a is connected by means of the signal line of the current band flatness 22.

It is practicable, in addition to the above-mentioned components of the flatness 10 also take into account a residual error that is not assigned to the above-described orthogonal components, but directly the eccentrics 14a. This assignment is made according to Fig. 5B with weighting functions derived from the eccentric influence functions and which assign the entire pending planarity error vector to the individual eccentrics 14a. Subsequently, a scalar error variable is formed from the residual error vectors 13 assigned to the eccentrics 14a by adding them up, and these are assigned to the eccentrics 14a via a control module 12d in each case.

For each orthogonal component of the flatness error vector ( Fig. 7 ) is in the highly dynamic control loop 29, a dynamic single controller 30 is provided, which is provided as a PI controller 31 with dead band in the input 32. Each individual controller 30 is preceded by adaptive parameterizing means 33 and a control display 34 in parallel connection, apart from the first analyzer 11a. At each individual controller 30 connections 35 are provided for control parameters K _i and K _p . Possibly. For example, the dynamic individual controllers 30 are to be connected to a user console 36.

The individual controller 30 for the C1 component (inclined position) works in the split-block design on the swivel-target value of the hydraulic adjusting means 17, in the monobloc design on the eccentric adjustment as a manipulated variable. The individual controllers 30 for all other components (C2, C3, C4 and, if necessary, higher orders) work on the eccentric actuators 14 of the outer support rollers 18. For the assignment of the supplied from the individual dynamic individual controllers 30 scalar variables to the eccentrics 14a are the Control functions 21 used. The control functions 21 convert a C1, C2, C3 -..... adjusting movement into a corresponding combination of the individual eccentric setting movements. The mentioned decoupling ensures that an adjusting movement, for example, of the C2 controller 30 does not affect any other orthogonal component except for the C2 component. The corresponding control functions are calculated as a function of the bandwidth 7 and of the number of active eccentrics 14a in advance from the influence functions. Depending on the actuator dynamics and the rolling speed, the PI controllers used have the adaptive parameterizing means 33 and thus ensure that the theoretically possible optimum control dynamics are achieved for all operating ranges. In addition, the chosen approach of calculating the control parameters K _i and K _p according to the method of the magnitude optimum allows a very simple commissioning, since the adjustment of the control dynamics from the outside takes over a parameter. With the highly dynamic individual controllers 30, depending on the rolling speed, settling times of less than 1 second are achieved.

According to Fig. 8 are error components for which no single controller 30 is provided, for which the associated individual controller 30 is switched off or those caused by inevitable inaccuracies in the calculated control functions, for example. Lack of decoupling, taken into account. Naturally, such occurring error components can not be eliminated by the highly dynamic individual controllers 30 of the orthogonal components. In order nevertheless to eliminate such error components, the flatness control method contains a residual error removal ( Fig. 8 ). The residual error removal works on the eccentrics 14a as actuators 3 and, with the error analysis described above, offers the possibility of fundamentally eliminating all flatness errors in which this is possible due to the given actuator characteristics. Due to the permanent coupling between the individual eccentrics 14a and due to possible interactions with the highly dynamic control of the orthogonal components, the residual error control should be operated only with a comparatively lower dynamics. The latter is based on a parameterizable, constant adjustment speed of the eccentric 14a, so that the control, depending on the rolling speed and control deviation, reaches slightly greater settling times. Accordingly, the residual error vector 13 is connected via residual error controllers 37, 38 and 39 to the actuators 3 of the eccentric 14a for residual error removal.

In order to take into account the special concerns of the 20-roll stands and the thin strip and foil rolling with respect to the tension at the strip edges 15 (band breaks occurring, strip running), the strip edges 15 are treated separately within the flatness control. As the actuator 3, the horizontal displacement of the inner cone intermediate rollers 19 is used. The edge tension control 16 separately according to each band edge 15 Fig. 9 a desired belt tension in the region of the one to two outermost covered zones of the flatness measuring roller 6a. The controlled variable is how out Fig. 9 can be seen, separately for each band edge 15 by difference between the control differences of the two outermost measurements of the flatness measuring roller 6a formed. As a result, the edge tension control 16 is independent of the reference curve 9 and decoupled from the other components of the planarity control. For the edge tension control 16, an analysis device 40 for the different band edge zones of the flatness measuring roller 6a is provided, to which two band edge controllers 41 and 42 are connected. The belt edge controllers 41, 42 are connected to the actuators 3 of the cone intermediate rollers 19. The band edge controllers 41, 42 are independently switchable. In addition, an adaptive Verstellgeschwindigkeits control means 43 and a control display 44 is connected to the two band edge controllers 41, 42 respectively. The edge voltage control 16 can thus be operated either asynchronously (independent operation for both band edges 15) or synchronously. The dynamics of the edge tension control 16 is characterized by the allowable displacement speed of the cone-intermediate roll horizontal displacement, which depends on rolling force and rolling speed.

LIST OF REFERENCE NUMBERS

1

stainless steel band

1 a

stainless steel foil

2

A cluster mill

2a

Sendzimir mill

2 B

roll set

3

actuator

4

loop

5a

enema

5b

outlet

6

Flatness measuring element

6a

Flatness measuring roller

7

bandwidth

8th

voltage vector

9

reference curve

10

Flatness errors

11

analysis module

11 a

first analyzer

11 b

second analyzer

11 c

third analyzer

12a

first rule module

12b

second control module

12c

third control module

12d

fourth rule module

13

Residual error vector

14

Eccentric actuator

14a

eccentric

15

band edge

16

Edges voltage regulation

17

hydraulic adjusting means

18

outer support rollers

19

Cone intermediate rolls

20

comparison signal

21

control functions

22

current band flatness

23

Input of the control loop

24

Output of the control loop

25

Coupling terminal

26

Flatness residual error

27

Output of the third control module

28

Output of the fourth control module

29

highly dynamic control loop

30

single dynamic controller for the orthogonal component

31

PI controller with dead band

32

entrance

33

adaptive parameterization means

34

control display

35

connection

36

operator console

37

Residual error controller

38

Residual error controller

39

Residual error-control device

40

Analyzer for different belt edge zones

41

Band-edge controller

42

Band-edge controller

43

adaptive adjustment speed control means

44

control display

Claims (23)

1. Method of measuring and regulating the planarity and/or the strip tensions of a stainless steel strip (1) or a stainless steel foil (1 a), for cold-rolling operation in a multi-roll stand (2), particularly in a 20-roll Sendzimir rolling mill (2a), comprising the following steps:

   determining the instantaneous distribution of the planarity (22) of the steel strip over the width (7) thereof on the basis of a measured strip tension, distributed over the strip width (7), in the run-out (5b) of the multi-roll stand (2);

   determining a planarity error (10) by comparison of the determined instantaneous distribution of the strip (22) with a predetermined reference curve (9);

   mathematical approximation of the received planarity error (10) over the strip width (7) in an analysis module and resolution of the approximated planarity error into scalar planarity error components (C1, C2, C3, C4); and

   calculation of first and further regulating output signals from the planarity error components for activation of a plurality of setting elements (3, 14a, 17, 18, 19) of the multi-roll stand (2);

   characterised in that the resolution of the approximated planarity error is carried out in such a manner that the resulting planarity error components (C1, C2, C3, C4) are orthogonal relative to one another;

   a first setting element in the form of a hydraulic adjusting means (17) from the plurality of setting means is, for adjustment of the roll set (2b), activated in response to the first regulating output signal, which is obtained from a first orthogonal component (C1) of the planarity error;

   calculation of the further regulating output signals in the form of scalar setting magnitude components each on the basis of a respective one of the remaining orthogonal components (C2, C3, C4) of the planarity error; and

   combining the scalar setting magnitude components into suitable activation signals for individual eccentric setting elements (14a) of the outer backing rolls (18) of the multi-roll stand from the plurality of setting elements.
2. Method according to claim 1, characterised in that the course of the planarity error (10) over the strip width (7) is approximated by a Gaussian approximation of 8th order (LSQ method) and subsequently resolved into the orthogonal components (C1 ... Cx).
3. Method according to one of claims 1 and 2, characterised in that a residual error vector (13) is analysed and the residual error vector (13) is applied directly to selected setting elements (3).
4. Method according to claim 3, characterised in that the assignment of the residual error vectors (13) is carried out by weighting functions which are derived from influencing functions of eccentric setting elements (14) and which assign all arising planarity errors (10) to the individual eccentrics (14a).
5. Method according to one of claims 3 and 4, characterised in that an error magnitude determined by real numerical values is formed by summation from the residual error vectors (13) assigned to the eccentrics (14a).
6. Method according to any one of claims 1 to 5, characterised in that the regulation for the strip edges (5) is carried out separately within the planarity regulation.
7. Method according to claim 6, characterised in that the horizontal displacement of the inner intermediate rolls (19) is used as setting element (3) for the edge tension regulation (16).
8. Method according to claim 7, characterised in that a predetermined strip tension in the region of one to two outermost congruent zones of a planarity measuring roller (6a) is used separately for each strip edge (15) by way of the edge tension regulation (16).
9. Method according to any one of claims 6 to 8, characterised in that the edge tension regulation (16) is operated selectably asynchronously or synchronously for the two strip edges (15).
10. Method according to claim 7, characterised in that the regulating magnitude for the edge tension regulation (16) is determined separately for each strip edge (15) by difference formation between the regulating differences of the two outermost measurement values of the planarity measuring roller (16a).
11. Equipment for measuring and regulating the planarity and/or strip tensions of a stainless steel strip (1) or a stainless steel foil (1a), for cold-rolling operation in a multi-roll stand (2), particularly in a 20-roll Sendzimir rolling mill (2a), comprising a planarity measuring element (6) in the run-out of the multi-roll stand (2) for determining the instantaneous distribution of the planarity (22) of the steel strip over the width (7) thereof on the basis of a measured strip tension, distributed over the strip width; equipment for determining a planarity error (8, 20) by comparison of the determined instantaneous distribution of the planarity (22) with a predetermined reference curve; and at least one regulating circuit (4) comprising an analysing device (11) with a first analysing apparatus (11a) for mathematical approximation of the received planarity error (8, 20) and for resolution of the approximated planarity error into scalar planarity error components (C1, C2, C3, C4) and further comprising a first and further regulating modules (30), which are connected downstream of the analysing device and associated with the planarity error components, for activating a plurality of setting elements (3, 14a, 17, 18, 19) of the multi-roll stand (2); characterised in that
    the first analysing element (11a) is constructed to so resolve the received planarity errors which it has approximated that the planarity error components (C1, C2, C3, C4) are orthogonal to one another;
    the first regulating module (30) is provided for actuating a setting element from the plurality of setting elements in the form of a hydraulic adjusting means (17) for adjusting the roll set (2b) on the basis of the received, first orthogonal component (C1) of the planarity error; the further regulating modules for the remaining orthogonal components (C2, C3, C4) of the planarity error are respectively constructed for providing scalar setting magnitude components; and
    a control device (21) is provided for combining the scalar setting magnitude components, which are received from the individual further regulating modules, into suitable setting movements for individual eccentric setting elements (14a) of the outer backing rolls (18) of the multi-roll stand from the plurality of setting elements.
12. Equipment according to claim 11, characterised in that the comparison signal (20) between the reference curve (9) and the instantaneous strip planarity (22) is applied by way of the independent analysing apparatus (11 b) to the independent third regulating module (12c) for a planarity residual error (26), the output (27) of which is applied to the coupling connection (25) for the setting element (3) consisting of the eccentrics (14a).
13. Equipment according to one of claims 11 and 12, characterised in that the comparison signal (20) between the reference curve (9) and the instantaneous strip planarity (22) is applied by way of a further, third independent analysing apparatus (11c) to an independent fourth regulating module (12d) for checking the edge tension regulation (16) and the output (28) thereof is applied to the setting element (3) of the conical inner intermediate rolls (19).
14. Equipment according to any one of claims 11 to 13, characterised in that a planarity measuring element (6) arranged in the run-out (5b) is connected with the signal line of the instantaneous strip planarity (22).
15. Equipment according to any one of claims 11 to 14, characterised in that a dynamic individual regulator (30), which as a PI (31) is provided with dead strip in the inlet (32), is provided for each planarity error (10).
16. Equipment according to claim 15, characterised in that apart from the first analysing apparatus (11 a) adaptive parameterising means (33) and a control display (34) are arranged in parallel upstream of each individual regulator (30).
17. Equipment according to one of claims 15 and 16, characterised in that connections (35) for regulating parameters (K_i, K_p) are provided at each individual regulator (30).
18. Equipment according to any one of claims 15 to 17, characterised in that the dynamic individual regulators (30) are connectible with a control console (36).
19. Equipment according to any one of claims 11 to 18, characterised in that for elimination of residual error the residual error vector (13) co-operates by way of residual error regulating apparatus (37, 38, 39) with the respective setting elements (3) of the eccentrics (14a).
20. Equipment according to claim 19, characterised in that the edge tension regulation (16) provides respective analysing apparatus (40) for different strip edge zones of the planarity measuring roller (6a), two strip edge regulating apparatus (41, 42) being connected with each analysing apparatus.
21. Equipment according to claim 20, characterised in that the strip edge regulating apparatus (41, 42) are connected with the setting elements (3) of the conical intermediate rolls (19).
22. Equipment according to one of claims 20 and 21, characterised in that the strip edge regulating apparatus (41, 42) are switchable independently of one another.
23. Equipment according to any one of claims 20 to 22, characterised in that a respective adaptive adjustment speed regulating means (43) and control display (44) are connected with each of the two strip edge regulating apparatus (41, 42).

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