Method and device for aligning at least one lateral guide strip of a rolling stand - Patent 7222247

Abstract

The invention relates to a method and a device for aligning at least one lateral guide strip (20-1 to 20-4) which laterally defines a transport path through a rolling stand (40), in particular for a rolled material to be rolled. For this, it is proposed according to the invention to first define the central axis of the transport path, and then all actuators (A1 to A8) of the lateral guide strip occupy their respective minimum extension positions. Then the respective perpendicular distances (a1 to A8) of at least two measuring points per lateral guide strip to the central axis are determined, and then from the minimum of the perpendicular distances an individual calibration stroke is determined for every individual actuator for controlling the lateral guide strip. Finally, all actuators are calibrated in that the individual extension positions of the actuators are changed by the calibration stroke calculated for the respective actuator starting from the minimum extension position.

Description

[Technical Field]

[0001] The present invention relates to a method and a device for aligning at least one lateral guide strip which laterally defines a transport path for a product, in particular a rolled stock to be rolled, through a rolling stand. [Background technology]

[0002] Such methods and devices are known in principle in the prior art. Thus, EP 3365120 B1 discloses a casting or rolling plant for producing or processing cast strand. The plant has a conveying path for the cast strand, with lateral guides at the edges of the conveying path guiding the cast strand. The lateral guides are moved transversely to the line of the conveying path into and out of the conveying path using actuators. This European patent document further discloses a method for measuring such lateral guides using laser light so that the intensity of wear in specific regions of the lateral guides can be determined. The measuring system described therein is installed in the casting or rolling plant and calibrated there before use. In the context of this specification, calibration primarily refers to the fine adjustment or fine positioning of the light source, the receiving device, and possibly the reflecting device using the associated adjustment elements, so that they are optimally aligned and can interact with each other.

[0003] The background art also includes Chinese Utility Model No. 203370832, which mainly describes the structural form of a slide guide for aligning lateral guide strips in parallel, particularly at the edges of a conveying path for slabs. In addition to aligning the lateral guide strips parallel to each other and to a predetermined center line of the conveying path, the slide guide also ensures that the distances of opposing lateral guide strips from the center line do not differ from each other by more than 5 mm. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] European Patent No. 3365120 [Patent Document 2] Chinese Utility Model No. 203370832 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem underlying the present invention is to provide an alternative method and an alternative device for aligning at least one lateral guide strip which laterally defines a transport path for a product, in particular a rolled stock to be rolled, through a rolling stand. [Means for solving the problem]

[0006] As regards the method, this problem is solved by the method claimed in claim 1.

[0007] The claimed method aligns at least one lateral guide strip parallel to the central axis of the conveying path. The claimed calibration of the at least one lateral guide strip along the conveying path advantageously ensures a uniform and even movement of the products to be conveyed, i.e., prevents bending of the products in particular. The drive-side lateral guide strip and the operating-side lateral guide strip calibrated according to the invention are adjusted by the method according to the invention so that they are preferably parallel and aligned with each other, and the opening dimensions of the lateral guide strips are calibrated in a common method sequence.

[0008] The claimed perpendicular distance measurement from the central axis of the transport path to the measuring point representing the point of action of the actuator on the lateral guide strip can be performed mechanically using a laser or visually.

[0009] The term "representing the point of application" here means "close to" and ideally in the center of the pivoted point of application. This also includes measuring points located inside the lateral guide strips at the shortest distance from the point of application of the actuator. The positions of the measuring points are preferably selected identically for all points of application.

[0010] The variable i denotes an operating variable, which in turn denotes the number of measurement points, such as the number of position sensors and the number of actuators, etc. This is feasible and reasonable, since according to the present invention it is necessary to assign a position sensor and a measurement point to each actuator, otherwise the method cannot be carried out with each actuator.

[0011] The required calibration method and calibration of the opening dimensions of the lateral guide strips is particularly useful when initially assembling and starting up a rolling stand, but also during subsequent realignment and calibration, for example after shutdowns for maintenance purposes and after replacing several components of the installation. Even in the case of modernization, the calibration method according to the invention allows position errors of the lateral guide strips due to dimensional differences resulting from existing old installation components and old foundations to be corrected by the use of independently adjustable strips in conjunction with the calibration method according to the invention.

[0012] Preferably, according to a first embodiment, each lateral guide bar is controlled by at least two actuators pivotally mounted on the lateral guide bar, offset in the longitudinal direction of the conveying path. The actuators are preferably pivotally mounted on the respective lateral guide bar's outer side, away from the center of the conveying path. The inner side of the lateral guide bar should be as smooth as possible to ensure smooth sliding of the products. According to the invention, the actuators can be individually position-controlled by assigned position sensors, i.e., distance sensors, preferably so-called Temposonic sensors.

[0013] According to another embodiment of the method according to the invention, the step of defining the central axis of the transport path is carried out in the following sub-steps:

[0014] First, a first reference point x and a second reference point y are set, both of which must be located on the central axis to define the central axis. Preferably, the laser beam is further aligned along the central axis of the conveying path defined by the reference points x and y as the reference axis.

[0015] Further embodiments of the method according to the invention relate to various possible transport paths. A transport path can therefore refer to the entry path upstream of the rolling stand, or the entry path and the path of the rolled material through the roll nip of the rolling stand, or the path through the roll nip of the rolling stand and the exit path from the rolling stand, or the exit path from the rolling stand, or the entry path upstream of the rolling stand and the path through the rolling stand and the exit path from the rolling stand. For all these transport path configurations, the lateral guide strips can be arranged differently. Furthermore, for all these configurations, the method according to the invention offers reliable options for calibrating the lateral guide strips or the actuators.

[0016] The problem of the invention is finally solved with respect to an apparatus according to claim 10. The advantages of this solution correspond to the advantages mentioned above with respect to the claimed method.

[0017] The specification is accompanied by two drawings. [Brief explanation of the drawings]

[0018] [Figure 1] 1 shows an apparatus according to the present invention. [Figure 2] 1 illustrates a method according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will now be described in detail by way of example with reference to the above-mentioned drawings.

[0020] 1 shows an apparatus 100 according to the invention for aligning at least one lateral guide strip 20-1 to 20-4 which laterally defines a transport path for the rolled material through a rolling stand 40. The rolling stand 40 is abstracted in FIG. 1 with its center line, i.e., the longitudinal direction of its rolls. This center line extends transversely to the transport direction T of the rolled material. The transport direction is also indicated by an arrow from left to right in FIG. 1.

[0021] Every individual lateral guide strip 20-1 to 20-4 is pivotally controlled by at least two actuators A1 to A8, respectively. Using these actuators, the lateral guide strip can be adjusted or positioned at its angle relative to the conveying direction and can slide transversely to the conveying direction, i.e., into or out of the conveying path. Each actuator A1 to A8 is assigned a position sensor S1 to S8, respectively, which acquires the current position of the assigned actuator. Each individual actuator is controlled by a control device 120, which, according to the invention, is programmed to carry out the method according to the invention. The sensors S1 to S8 inform the control device of the acquired actuator position. The device 100 according to the invention comprises actuators, position sensors, and a control device. The lateral guide strips 20-1 to 20-4 and the rolling stand 40 are not the subject of the device according to the invention.

[0022] The method according to the invention according to Fig. 2 is used to align the lateral guide strips or to calibrate the actuators which control the lateral guide strips. In Fig. 2, the term "cylinder" denotes an example of an "actuator". The following steps are provided: In a variant not shown, the calibration can also be carried out by means of an adjusting plate.

[0023] First, the straight conveying path for the product and the central axis of the conveying path are defined. To this end, a first reference point X and a second reference point Y are set, both of which must lie on the central axis of the conveying path. In this case, the central axis itself is defined along the central axis of the path defined by both reference points X and Y as the reference axis, preferably by aligning a laser beam (see method steps 1 to 3 in FIG. 2). The first reference point X is preferably set in the region of the beginning of the lateral guide, while the second reference point Y is preferably set at the end of the lateral guide Y, so that the two reference points X and Y are as far apart as possible from each other. The greater this distance, the more precisely the conveying path can be defined.

[0024] Following this, in step 4 of the method, all lateral guide strips 20-1 to 20-4 are assumed to be in their maximum open dimension, i.e., their actuators A1 to A8 are respectively in their respective minimum extended positions. In this minimum extended position, the lateral guide strips are each at their maximum distance from the central axis of the conveying path. Step 3 of the method according to Fig. 2 can in any case only be carried out after steps 1 and 2, while step 4 can be carried out at any time before or during steps 1, 2 or 3. The method according to the invention is necessary because typically not all actuators are pre-assembled at exactly the same distance from the central axis of the conveying path and / or the positioning or respective minimum extended positions of all actuators themselves are imprecise.

[0025] After all lateral guide strips 20-1 to 20-4 have reached their minimum extension position, in method step 5, the perpendicular distances ai of at least two measurement points i, with i ≥ 2, for each lateral guide strip 20-1 to 20-4 relative to the central axis of the conveying path are determined. The measurement points represent the pivot points of the actuators A1 to A8 on the lateral guide strips, respectively. Ideally, the measurement points are located at the center of the pivot points, but in practice, measurement points can also be selected inside each lateral guide strip, preferably at a minimum distance from the associated pivot point. However, for reasons of uniform measurement results, it is advisable to always design the measurement points on all lateral guide strips in the same way.

[0026] After the individual perpendicular distances have been determined, the minimum of these distances is calculated or determined in method step 6, preferably averaged over all actuators and lateral guide strips. According to method step 7, the determination of the individual calibration stroke or offset value for each actuator is then carried out according to the formula Δi=ai-amin (1) This is carried out in accordance with the following:

[0027] At the end of the method, the actuators A1 to A8 are calibrated by varying the individual extension position of each of the actuators A1 to A8 by the individual calibration stroke Δi of each of the actuators A1 to A8 starting from the minimum extension position of each of the actuators A1 to A8 to the calibrated extension position, according to method step 8. This variation may be realized according to the invention by extending the actuator by the individual calibration stroke of the actuator, or by lengthening the actuator according to the calibration stroke Δi by means of an adjusting plate, i.e. a spacer, or by a combination of both measures in an appropriate proportion.

[0028] As a result, such measures ultimately result in parallel alignment and uniform mutual spacing of all individual lateral guide strips relative to the central axis of the transport path, especially in the calibrated extension position of all actuators.

[0029] Advantageously, the method is applicable to various conveying paths, i.e. various configurations of the lateral guide strips with respect to the rolling stands. Some examples are given below.

[0030] In this case, the lateral guide strips on the entry side of the rolling stand are called entry side guide strips, and the lateral guide strips on the exit side of the rolling stand are called exit side guide strips.

[0031] First example At least one approach lateral guide strip 20-2 is provided along the approach on at least one side, seen in the conveying direction (T), upstream of the rolling stand 40. By conveying path is meant the approach on the upstream side of the rolling stand 40. Preferably, both reference points X, Y are located upstream of the rolling stand 40. The first reference point X is further from the rolling stand than the second reference point Y.

[0032] Second Example At least one entry lateral guide strip 20-2 is provided along the entry path on at least one side upstream of the rolling stand 40, as viewed in the conveying direction T. By conveying path is meant the entry path of the rolling stand and the path of the rolled stock 40 through the roll nip of the rolling stand. Preferably, a first reference point X is located at the start of one or more entry lateral guide strips, and a second reference point Y is located downstream of the rolling stand.

[0033] Third Example At least one exit path lateral guide strip 20-4 is provided along the exit path downstream of the rolling stand 40 on at least one side, as viewed in the conveying direction T. By conveying path is meant the path through the roll nip of the rolling stand 40 and the exit path from the rolling stand 40. Preferably, the first reference point X is located upstream of the rolling stand 40, and the second reference point is located downstream of the rolling stand, preferably at the end of the at least one exit path lateral guide strip 20-4.

[0034] Fourth Example At least one exit path lateral guide strip 20-4 is provided along the exit path downstream of the rolling stand 40 on at least one side, as seen in the conveying direction T. By conveying path is meant the exit path from the rolling stand 40. Preferably, both reference points X, Y are located downstream of the rolling stand 40, in which case the first reference point X is preferably provided at the start of at least one exit path lateral guide strip and the second reference point is preferably provided at the end of at least one exit path lateral guide strip.

[0035] Fifth Example At least one entry lateral guide strip 20-2 is provided along the entry path on at least one side upstream of the rolling stand 40, as viewed in the conveying direction T, and at least one exit lateral guide strip 20-4 is arranged along the exit path on at least one side downstream of the rolling stand 40, as viewed in the conveying direction T. By the term "transport path" is meant the entry path upstream of the rolling stand 40, the path through the rolling stand, and the exit path from the rolling stand. A first reference point is located upstream of the rolling stand, preferably at the start of the entry lateral guide strip, and a second reference point Y is located downstream of the rolling stand 40, preferably at the end of the exit lateral guide strip 20-4.

[0036] The actuator is preferably a controllable hydraulic cylinder. The present application relates to the invention described in the claims, but also includes the following as other aspects. 1. A method for aligning at least one lateral guide strip (20-1 to 20-4) which laterally defines a conveying path for a product, in particular a rolled material to be rolled, passing through a rolling stand (4), comprising: the lateral guide strips (20-1 to 20-4) are movable transversely to the conveying path into and out of the conveying path by means of at least two actuators (A1 to A8) pivoted on the lateral guide strips at at least two points of application on the outside, below defining a central axis of the conveying path; - all actuators (A1 to A8) of the lateral guide strips (20-1 to 20-4) are in their minimum extended positions, so that the lateral guide strips are at a maximum distance from the central axis of the conveying path; determining the perpendicular distances of at least two measurement points i, with i≧2, for each of the lateral guide strips (20-1 to 20-4) relative to the central axis when the actuators are in their respective minimum extension positions, wherein the measurement points each represent a pivot point of the actuators (A1 to A8) on the lateral guide strips; Identifying a minimum amin of the identified perpendicular distances; calculating an individual calibration stroke Δi for each of said actuators, number i, where i≧2, where Δi=ai−amin; calibrating the actuators (A1 to A8) by varying the extension position of each of the actuators (A1 to A8) from a minimum extension position of each of the actuators (A1 to A8) by an individual calibration stroke Δi of each of the actuators (A1 to A8) to a calibrated extension position; A method comprising: 2. 2. The method according to claim 1, characterized in that at least two of the actuators (A1 to A8) are pivotally arranged on the lateral guide strips (20-1 to 20-4) offset in the longitudinal direction of the conveying path or the lateral guide strips. 3. The step of defining the central axis of the conveying path includes the steps of: a substep of setting a first reference point (X) and a second reference point (Y), wherein both the first reference point (X) and the second reference point (Y) must be located on the central axis to define the central axis; Preferably, a partial step of aligning the laser beam as a reference axis along a central axis of the conveying path defined by both said reference points (X, Y); have 3. The method according to claim 1 or 2, 4. at least one approach lateral guide strip (20-2) is provided along the approach at least on one side upstream of the rolling stand (40) in the conveying direction (T), The conveying path means an approach path on the upstream side of the rolling stand; Preferably, both of said reference points (X, Y) are located upstream of said rolling stand (40), The first reference point (X) is farther from the rolling stand than the second reference point (Y). 3. The method according to claim 3, 5. at least one approach lateral guide strip (20-2) is provided along the approach at least on one side upstream of the rolling stand (40) in the conveying direction (T), "Transport path" means the entry path and the passage of the rolled material (40) through the roll nip of said rolling stand; When viewed in the conveying direction of the rolled material (40), the first reference point (X) is preferably located at the start of the entry path side guide strip, and the second reference point (Y) is located downstream of the rolling stand. 3. The method according to claim 3, 6. At least one exit path lateral guide strip (20-4) is provided along the exit path downstream of the rolling stand (40) on at least one side in the conveying direction (T), The conveying path means a path through the roll nip of the rolling stand (40) and an exit path from the rolling stand (40); When viewed in the conveying direction of the rolled material, the first reference point (X) is preferably located upstream of the rolling stand (4), and the second reference point (Y) is located downstream of the rolling stand, preferably at the end of at least one of the exit path lateral guide strips (20-4). 3. The method according to claim 3, 7. At least one exit path lateral guide strip (20-4) is provided along the exit path downstream of the rolling stand (40) on at least one side in the conveying direction (T), The conveying path means an exit path from the rolling stand (40), Preferably, both reference points (X, Y) are located downstream of the rolling stand (40), the first reference point (X) preferably being located at the beginning of at least one of the exit path lateral guide strips, and the second reference point (Y) preferably being located at the end of at least one of the exit path lateral guide strips. 3. The method according to claim 3, 8. at least one approach path lateral guide strip (20-2) is provided along the approach path on at least one side upstream of the rolling stand (40) as viewed in the conveying direction (T), and at least one exit path lateral guide strip (20-4) is provided along the exit path on at least one side downstream of the rolling stand (40) as viewed in the conveying direction (T), The conveying path includes an entrance path on the upstream side of the rolling stand (40) and rolling A passageway through the stand and an exit path from said rolling stand (40) are included; When viewed in the conveying direction of the rolled material, the first reference point (X) is located upstream of the rolling stand, preferably at the start of the entry path side guide strip, and the second reference point (Y) is located downstream of the rolling stand (40), preferably at the end of the exit path side guide strip (20-4). 3. The method according to claim 3, 9. 9. The method according to any one of claims 1 to 8, characterized in that the change in the extension position of at least one of the actuators to a calibrated extension position can be achieved by extending the actuator by its respective calibration stroke, or by lengthening the actuator according to the calibration stroke Δi by means of an adjusting plate or spacer, or by combining both of these measures in an appropriate proportion. 10. A device (100) for aligning at least one lateral guide strip (20-1, 20-2, 20-3, 20-4) which laterally defines a conveying path for a product, in particular a rolled material to be rolled, passing through a rolling stand (40), comprising: at least two actuators (A1 to A8) are provided for each of the lateral guide strips (20-1 to 20-4), each of which is pivotally supported in the upstream and downstream areas of the lateral guide strips (20-1 to 20-4) in the conveying direction (T) of the rolled material so that the lateral guide strips (20-1 to 20-4) are positioned transversely to the conveying path (T) in and out of the conveying path (T); a position sensor (S1 to S8), preferably assigned to each of said actuators (A1 to A8), for obtaining the current position of each of said assigned actuators (A1 to A8); a control device (120) for controlling the actuators (A1 to A8); An apparatus (100) comprising: The device (100) is characterized in that the control device (120) is configured and specifically programmed to carry out any one of the methods 1 to 9 above. [Explanation of symbols]

[0037] 20-1 to 20-4 Side guide strips 40 rolling stands 100 devices 120 Control device A1 to A8 actuators S1 to S8 Position Sensors T Conveying direction, conveying path X First reference point Y Second reference point

Claims

1. A method for aligning at least one lateral guide strip (20-1 to 20-4) which laterally defines a conveying path for a material to be rolled through a rolling stand (40), comprising: the lateral guide strips (20-1 to 20-4) are movable transversely to the conveying path into and out of the conveying path by means of at least two actuators (A1 to A8) pivoted on the lateral guide strips at at least two points of application on the outside, below defining a central axis of the conveying path; - all actuators (A1 to A8) of the lateral guide strips (20-1 to 20-4) are in their minimum extended positions, so that the lateral guide strips are at a maximum distance from the central axis of the conveying path; - when the actuators are in their respective minimum extended positions, determining the perpendicular distances of at least two measuring points i, with i≧2, for each of the lateral guide strips (20-1 to 20-4) relative to the central axis, each measuring point representing a pivot point of the actuators (A1 to A8) on the lateral guide strip; determining a minimum value a min of the determined perpendicular distances; calculating an individual calibration stroke Δi for each of said actuators, number i, where i≧2, where Δi=ai−amin; calibrating the actuators (A1 to A8) by varying the extension position of each of the actuators (A1 to A8) from a minimum extension position of each of the actuators (A1 to A8) by an individual calibration stroke Δi of each of the actuators (A1 to A8) to a calibrated extension position of each of the actuators (A1 to A8); A method comprising:

2. 2. The method according to claim 1, wherein at least two of the actuators (A1 to A8) are pivotally arranged on the lateral guide bars (20-1 to 20-4) offset relative to one another in the longitudinal direction of the conveying path or of the lateral guide bars.

3. The step of defining the central axis of the conveying path includes the steps of: a substep of setting a first reference point (X) and a second reference point (Y), wherein both the first reference point (X) and the second reference point (Y) must be located on the central axis to define the central axis; a sub-step of aligning a laser beam as a reference axis along a central axis of the conveying path defined by both said reference points (X, Y); have 3. The method according to claim 1 or 2.

4. at least one approach lateral guide strip (20-2) is provided along the approach at least on one side upstream of the rolling stand (40) in the conveying direction (T), The conveying path means an approach path on the upstream side of the rolling stand; Both of said reference points (X, Y) are located upstream of said rolling stand (40), The first reference point (X) is farther from the rolling stand than the second reference point (Y).

4. The method according to claim 3.

5. at least one approach lateral guide strip (20-2) is provided along the approach at least on one side upstream of the rolling stand (40) in the conveying direction (T), conveying path means the inlet path and the passage of the product in the form of rolled stock (40) through the roll nip of said rolling stand; As seen in the conveying direction of the product in the form of rolled material (40), the first reference point (X) is located at the beginning of the entry lateral guide strip, and the second reference point (Y) is located downstream of the rolling stand.

4. The method according to claim 3.

6. at least one exit path lateral guide strip (20-4) is provided along the exit path downstream of the rolling stand (40) on at least one side in the conveying direction (T), The conveying path means the path through the roll nip of the rolling stand (40) and the exit path from the rolling stand (40), Seen in the conveying direction of the product in the form of rolled material, the first reference point (X) is located upstream of the rolling stand (4), and the second reference point (Y) is located downstream of the rolling stand at the end of at least one of the exit path lateral guide strips (20-4).

4. The method according to claim 3.

7. at least one exit path lateral guide strip (20-4) is provided along the exit path downstream of the rolling stand (40) on at least one side in the conveying direction (T), The conveying path means the exit path from the rolling stand (40), Both of the reference points (X, Y) are located downstream of the rolling stand (40), the first reference point (X) being located at the start of at least one of the exit path lateral guide strips, and the second reference point (Y) being located at the end of at least one of the exit path lateral guide strips.

4. The method according to claim 3.

8. at least one entry path lateral guide strip (20-2) is provided along the entry path on at least one side upstream of the rolling stand (40) as viewed in the conveying direction (T), and at least one exit path lateral guide strip (20-4) is provided along the exit path on at least one side downstream of the rolling stand (40) as viewed in the conveying direction (T), The conveying path includes an entrance path upstream of the rolling stand (40), a passage through the rolling stand (40), and an exit path from the rolling stand (40), Seen in the conveying direction of the product in the form of rolled material, the first reference point (X) is located upstream of the rolling stand at the beginning of the entry path lateral guide strip, and the second reference point (Y) is located downstream of the rolling stand (40) at the end of the exit path lateral guide strip (20-4).

4. The method according to claim 3.

9. 9. The method according to claim 1, wherein the change of the extension position of at least one of the actuators to a calibrated extension position can be realized by extending the actuator by its respective calibration stroke, or by lengthening the actuator according to the calibration stroke Δi by means of an adjusting plate or spacer, or by combining both measures in an appropriate proportion.

10. An apparatus (100) for aligning at least one lateral guide strip (20-1, 20-2, 20-3, 20-4) that laterally defines a conveying path for products, comprising: actuators (A1 to A8) for moving the lateral guide strips (20-1 to 20-4) transversely to the conveying path (T) into and out of the conveying path (T) to predetermined positions; a control device (120) for controlling the actuators (A1 to A8); An apparatus (100) comprising: at least two actuators (A1 to A8) are provided for each lateral guide strip (20-1 to 20-4), one of the actuators (A1 to A8) being pivotally supported in the upstream and downstream areas of the lateral guide strip in the conveying direction (T) of the products, The control device (120) when carrying out the method according to any one of claims 1 to 9 comprises: - all the actuators (A1 to A8) for each of the lateral guide strips (20-1 to 20-4) are in their minimum extension position, so that the lateral guide strips are at their maximum distance from the central axis of the conveying path; calibrating the actuators (A1 to A8) by varying the extension position of the actuators (A1 to A8) by an individual calibration stroke Δi of each of the actuators (A1 to A8), starting from the minimum extension position of each of the actuators (A1 to A8), to a calibrated extension position of each of the actuators (A1 to A8); and - to perform a calibration of said actuators (A1 to A8) on the basis of the determined orthogonal distances ai, the determined minimum value amin based on said orthogonal distances, and the determined respective calibration stroke Δi for each said actuator; An apparatus (100) characterized in that it is programmed.

11. 11. The device (100) according to claim 10, characterized in that a position sensor (S1 to S8) is assigned to each of the actuators (A1 to A8) in order to obtain the current position of each of the assigned actuators (A1 to A8).

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