US20100089962A1 - Method and Device for the Control of a Feed Mechanism - Google Patents
Method and Device for the Control of a Feed Mechanism Download PDFInfo
- Publication number
- US20100089962A1 US20100089962A1 US12/520,763 US52076307A US2010089962A1 US 20100089962 A1 US20100089962 A1 US 20100089962A1 US 52076307 A US52076307 A US 52076307A US 2010089962 A1 US2010089962 A1 US 2010089962A1
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- United States
- Prior art keywords
- web
- tensile stress
- feed mechanism
- drive
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/02—Conveying or guiding webs through presses or machines
- B41F13/03—Threading webs into printing machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/195—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/52—Auxiliary process performed during handling process for starting
- B65H2301/522—Threading web into machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
- B65H2557/20—Calculating means; Controlling methods
- B65H2557/24—Calculating methods; Mathematic models
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/03—Image reproduction devices
- B65H2801/21—Industrial-size printers, e.g. rotary printing press
Definitions
- the invention concerns a method for automatically controlling a feed mechanism of a web-fed printing press.
- the invention also concerns a device for automatically controlling a feed mechanism of a web-fed printing press.
- a feed mechanism the purpose of which is to draw a web of printing material into a printing unit of a web-fed printing press, has at least one roll driven by a drive unit of the feed mechanism.
- the driven roll of the feed mechanism is operated at a lower speed of revolution or peripheral speed than the rolls or cylinders of the printing unit that serve to convey the web of printing material, so that a well-defined web tensile stress is produced between the feed mechanism and the printing unit for the web of printing material that is to be drawn in.
- the web tensile stress is a force, and the web tension is calculated from the web tensile stress by dividing the web tensile stress by the width of the web of printing material that is to be drawn in.
- the web tension can be automatically controlled by comparing an actual value of the web tension with a corresponding setpoint value, where a control unit generates a correcting variable for the feed mechanism, depending on the difference between the actual value and the set point or the deviation of the actual value from the set point.
- a measured actual value of the web tension is used, from which it follows that a suitable measuring device is necessary for measuring the web tension.
- the use of a measuring device for the web tension necessitates a complex design of the feed mechanism and of the web-fed printing press which increases the feed mechanism's costs.
- An object of the present invention is to create a novel method and device for automatically controlling a feed mechanism of a web-fed printing press.
- the actual value of the web tensile stress and/or the web tension is determined mathematically based on a model.
- the automatic control of the web tensile stress and/or the web tension is preferably superimposed on the automatic control of a speed of the drive of the feed mechanism or on the automatic control of a state of the drive of the feed mechanism.
- FIG. 1 is a schematic section of a web-fed printing press to illustrate one embodiment the invention
- FIG. 2 is a schematic drawing of a preferred automatic control design for a drive of a feed mechanism of the web-fed printing press
- FIG. 3 is a signal-flow diagram of a model for mathematically determining an actual value of the web tensile stress and/or the web tension
- FIG. 4 is a signal-flow diagram of another model for mathematically determining an actual value of the web tensile stress and/or the web tension.
- FIG. 1 is a schematic section of a web-fed printing press in the area of two printing units 10 , 11 arranged one above the other and a reel changer 12 located upstream of the two printing units 10 , 11 .
- a web printing material is kept ready in the form of a roll of printing material 13 and is unwound from the roll of printing material 13 as a web of printing material 14 .
- the web of printing material 14 is drawn into the printing unit 10 by means of a feed mechanism 15 assigned to the printing unit 10 .
- the feed mechanism 15 has a roll 17 , which is driven by a drive 16 and serves the purpose of drawing the web of printing material 14 into the printing unit.
- the printing units 10 , 11 are preferably 8-cylinder printing units. Accordingly, each of the printing units 10 , 11 has four printing couples, and each printing couple has a form cylinder 18 and a transfer cylinder 19 .
- the transfer cylinders 19 of each pair of printing couples roll against each other to form a nip for the web of printing material 14 .
- the transfer cylinders 19 also take on the function of further conveyance of the web of printing material 14 through the printing units 10 , 11 .
- the roll 17 of the feed mechanism 15 is driven at a different speed of rotation or peripheral speed from the transfer cylinders 19 of the printing units 10 , 11 in order to produce a well-defined web tensile stress and/or a well-defined web tension for the web of printing material 14 .
- a drive controller 20 is assigned to the drive 16 of the feed mechanism 15 .
- FIG. 2 shows the preferred configuration of the drive controller 20 .
- the drive controller 20 illustrated in FIG. 2 automatically controls not only the web tensile stress and/or the web tension of the web of printing material but also the speed of the drive 16 .
- the drive controller 20 of FIG. 2 comprises a control system 21 for automatically controlling the speed of the drive 16 .
- This speed controller 21 outputs a correcting variable Y MOT for the drive 16 based on the deviation of a measured actual value N IST of the speed of the drive 16 from a setpoint value N SOLL for the speed of the drive 16 .
- a speed sensor 22 is assigned to the drive 16 to make the measurement of the actual value N IST of the drive 16 .
- the drive controller 20 comprises, in addition to the speed controller 21 , a control system 23 for automatically controlling the web tensile stress and/or the web tension.
- the control system 23 for automatically controlling the web tensile stress and/or the web tension determines a correcting variable Y N for the feed mechanism 15 .
- this set point Y N for the feed mechanism 15 is an offset for the set point N SOLL of the speed of the drive 16 .
- the actual value X IST of the web tensile stress and/or the web tension is not determined by measurement but rather mathematically based on a model.
- the output variable of the model 24 is the actual value X IST for the web tensile stress and/or the web tension.
- the following input variables are supplied to the model 24 : a motor torque M MOT of the drive 16 , which is measured by a torque sensor 25 , the actual value N IST of the speed of the drive 16 , which is measured by the speed sensor 22 , a web tensile stress value and/or web tension value X RW of the reel changer 12 , and a friction torque M REIB of the feed mechanism 15 .
- the model 24 according to FIG. 4 determines the actual value X IST of the web tensile stress and/or the web tension as follows:)
- X IST is the computed actual value of the web tensile stress and/or the web tension
- X RW is the value of the web tensile stress and/or the value of the web tension of the reel changer
- M MOT is the motor torque of the drive
- N IST is the speed of the drive
- G 1 and G 2 are smoothing functions
- an electric current that creates the motor torque is determined by measurement and used as the input quantity for the model 24 .
- the web tensile stress value and/or the web tension value of the reel changer it is possible to use a quantity that creates the web tensile stress value and/or the web tension value.
- the smoothing functions G 1 and G 2 which smooth the motor torque M MOT or the web tensile stress value and/or the web tension value X RW of the reel changer, are filter functions.
- the smoothing functions G 1 and G 2 are preferably dispensed with if quantities that are already suitably smoothed are being supplied by the torque sensor 25 and/or reel changer.
- the quantities c, m, and a are constants.
- the quantities c and m are the constants of the speed-dependent, linearized friction torque M REIB .
- the constant a is a conversion factor, which is dependent on a speed ratio i between the drive 16 and roll 17 of the feed mechanism 15 and on the radius r of the roll 17 .
- the conversion factor is defined as follows:
- the simplified model 24 ′ shown in FIG. 3 can also be used.
- a constant friction torque M REIB c is used for computing the actual value X IST of the web tensile stress and/or the web tension, so that the speed N IST of the drive 16 is not needed as an input variable for the model 24 ′.
- the model 24 ′ according to FIG. 3 determines the actual value X IST of the web tensile stress and/or the web tension as follows:
- X IST is the computed actual value of the web tensile stress and/or the web tension
- X RW is the value of the web tensile stress and/or the value of the web tension of the reel changer
- M MOT is the motor torque of the drive
- G 1 and G 2 are a smoothing functions, (which can be equal to 1 when the smoothing function is not required) and
- a and c are constants.
- automatic control of the web tensile stress and/or the web tension is superimposed on the automatic speed control of the drive 16 .
- the automatic control of the web tensile stress and/or the web tension is superimposed on automatic control of a state of the drive 16 of the feed mechanism 15 , in which case the control system 23 for the web tensile stress and/or the web tension then outputs an offset for the setpoint value of the state of the drive 16 as a correcting variable.
- the control system 23 can also adjust a transmission or scaling factor.
- a moment of inertia of the feed mechanism is considered as a further input variable in order to improve the computation of the actual value X IST of the web tensile stress and/or the web tension when changes in the speed occur.
- control system 23 for the web tensile stress and/or the web tension and the model 24 for mathematically determining the actual value X IST of the web tensile stress and/or the web tension are integrated in the drive controller 20 .
- control system 23 for the web tensile stress and/or the web tension and the model 24 for mathematically determining the actual value X IST of the web tensile stress and/or the web tension are integrated in the drive controller 20 .
- the constants a, c, and possibly m of the models 24 and 24 ′ are determined manually or by automated means.
- a device for measuring the web tension is installed between the feed mechanism 15 and the printing unit 10 for determining the parameters, and in this case, the drive controller 20 is operated with different setpoint values for the web tensile stress at different speeds.
- the torque of the drive or the current of the drive that creates the torque, the speed of the drive, and the web tension are determined by measurement, and the parameters c, m, and a are computed from these measured determinations by numerical optimization.
- the parameters determined in this way are then used in the model in order to mathematically determine the actual value X IST for the web tensile stress and/or the web tension later in the operation without a measuring device for the web tensile stress.
Abstract
A method for the control of a feed mechanism of a web-fed printing press, i.e., for the control of tensile stress and/or web tension of a printing material web to be taken into the printing unit by the feed mechanism, wherein thereby an actual value is compared with a desired value. According to the discrepancy between the actual value and the desired value, a control device for the tensile stress and/or the web tension produces a correcting variable for the feed mechanism. The actual value of the tensile stress and/or the web tension is determined by calculation based on a model.
Description
- This is a U.S. national stage of application No. PCT/EP2007/011272, filed on 20 Dec. 2007, which claims Priority to the German Application No.: 10 2006 061 252.3, filed: 22 Dec. 2006; the contents of both being incorporated herein by reference.
- 1. Field of the Invention
- The invention concerns a method for automatically controlling a feed mechanism of a web-fed printing press. The invention also concerns a device for automatically controlling a feed mechanism of a web-fed printing press.
- 2. Prior Art
- It is already well known from practice that webs of printing material can be drawn into printing units of a web-fed printing press by feed mechanisms. A feed mechanism, the purpose of which is to draw a web of printing material into a printing unit of a web-fed printing press, has at least one roll driven by a drive unit of the feed mechanism. The driven roll of the feed mechanism is operated at a lower speed of revolution or peripheral speed than the rolls or cylinders of the printing unit that serve to convey the web of printing material, so that a well-defined web tensile stress is produced between the feed mechanism and the printing unit for the web of printing material that is to be drawn in. The web tensile stress is a force, and the web tension is calculated from the web tensile stress by dividing the web tensile stress by the width of the web of printing material that is to be drawn in.
- It is known from EP 0 976 674 B2 that the web tension can be automatically controlled by comparing an actual value of the web tension with a corresponding setpoint value, where a control unit generates a correcting variable for the feed mechanism, depending on the difference between the actual value and the set point or the deviation of the actual value from the set point. According to EP 0 976 674 B2, a measured actual value of the web tension is used, from which it follows that a suitable measuring device is necessary for measuring the web tension. The use of a measuring device for the web tension necessitates a complex design of the feed mechanism and of the web-fed printing press which increases the feed mechanism's costs.
- An object of the present invention is to create a novel method and device for automatically controlling a feed mechanism of a web-fed printing press.
- In accordance with one embodiment of the invention, the actual value of the web tensile stress and/or the web tension is determined mathematically based on a model.
- Accordingly, there is no need for a measuring device or a sensor for determining an actual value of the web tensile stress and/or the web tension. This results in a simpler design of the feed mechanism and the web-fed printing press with less complexity and thus lower costs.
- The automatic control of the web tensile stress and/or the web tension is preferably superimposed on the automatic control of a speed of the drive of the feed mechanism or on the automatic control of a state of the drive of the feed mechanism.
- The invention is described in greater detail below with reference to specific embodiments, but it is not limited to these embodiments.
-
FIG. 1 is a schematic section of a web-fed printing press to illustrate one embodiment the invention; -
FIG. 2 is a schematic drawing of a preferred automatic control design for a drive of a feed mechanism of the web-fed printing press; -
FIG. 3 is a signal-flow diagram of a model for mathematically determining an actual value of the web tensile stress and/or the web tension; and -
FIG. 4 is a signal-flow diagram of another model for mathematically determining an actual value of the web tensile stress and/or the web tension. -
FIG. 1 is a schematic section of a web-fed printing press in the area of twoprinting units 10, 11 arranged one above the other and areel changer 12 located upstream of the twoprinting units 10, 11. In the vicinity of thereel changer 12, a web printing material is kept ready in the form of a roll of printing material 13 and is unwound from the roll of printing material 13 as a web of printing material 14. The web of printing material 14 is drawn into theprinting unit 10 by means of afeed mechanism 15 assigned to theprinting unit 10. Thefeed mechanism 15 has aroll 17, which is driven by adrive 16 and serves the purpose of drawing the web of printing material 14 into the printing unit. - The
printing units 10, 11 are preferably 8-cylinder printing units. Accordingly, each of theprinting units 10, 11 has four printing couples, and each printing couple has aform cylinder 18 and atransfer cylinder 19. Thetransfer cylinders 19 of each pair of printing couples roll against each other to form a nip for the web of printing material 14. Thetransfer cylinders 19 also take on the function of further conveyance of the web of printing material 14 through theprinting units 10, 11. Theroll 17 of thefeed mechanism 15 is driven at a different speed of rotation or peripheral speed from thetransfer cylinders 19 of theprinting units 10, 11 in order to produce a well-defined web tensile stress and/or a well-defined web tension for the web of printing material 14. - A
drive controller 20 is assigned to thedrive 16 of thefeed mechanism 15.FIG. 2 shows the preferred configuration of thedrive controller 20. Thedrive controller 20 illustrated inFIG. 2 automatically controls not only the web tensile stress and/or the web tension of the web of printing material but also the speed of thedrive 16. Accordingly, thedrive controller 20 ofFIG. 2 comprises acontrol system 21 for automatically controlling the speed of thedrive 16. Thisspeed controller 21 outputs a correcting variable YMOT for thedrive 16 based on the deviation of a measured actual value NIST of the speed of thedrive 16 from a setpoint value NSOLL for the speed of thedrive 16. Aspeed sensor 22 is assigned to thedrive 16 to make the measurement of the actual value NIST of thedrive 16. - Automatic control of the web tensile stress and/or the web tension is superimposed on the automatic speed control. The
drive controller 20 comprises, in addition to thespeed controller 21, acontrol system 23 for automatically controlling the web tensile stress and/or the web tension. On the basis of the deviation between a setpoint value XSOLL for the web tensile stress and/or the web tension and a corresponding actual value XIST, thecontrol system 23 for automatically controlling the web tensile stress and/or the web tension determines a correcting variable YN for thefeed mechanism 15. In the specific embodiment ofFIG. 2 , this set point YN for thefeed mechanism 15 is an offset for the set point NSOLL of the speed of thedrive 16. - In accordance with one embodiment of the present invention, the actual value XIST of the web tensile stress and/or the web tension is not determined by measurement but rather mathematically based on a model. The output variable of the
model 24 is the actual value XIST for the web tensile stress and/or the web tension. In the specific embodiment ofFIG. 2 , the following input variables are supplied to the model 24: a motor torque MMOT of thedrive 16, which is measured by atorque sensor 25, the actual value NIST of the speed of thedrive 16, which is measured by thespeed sensor 22, a web tensile stress value and/or web tension value XRW of thereel changer 12, and a friction torque MREIB of thefeed mechanism 15. The friction torque MREIB of thefeed mechanism 15 is a speed-dependent quantity, where the friction torque is preferably linearized MREIB=m*NIST+c. - The
model 24 according toFIG. 4 then determines the actual value XIST of the web tensile stress and/or the web tension as follows:) -
X IST =G2(X RW)+a*[G1(M MOT)+m*N IST +c] - where:
- XIST is the computed actual value of the web tensile stress and/or the web tension,
- XRW is the value of the web tensile stress and/or the value of the web tension of the reel changer,
- MMOT is the motor torque of the drive,
- NIST is the speed of the drive,
- G1 and G2 are smoothing functions,
- and a, m, and c are constants.
- In one embodiment, instead of the motor torque MMOT of the
drive 16, an electric current that creates the motor torque is determined by measurement and used as the input quantity for themodel 24. Likewise, instead of the web tensile stress value and/or the web tension value of the reel changer, it is possible to use a quantity that creates the web tensile stress value and/or the web tension value. - The smoothing functions G1 and G2, which smooth the motor torque MMOT or the web tensile stress value and/or the web tension value XRW of the reel changer, are filter functions. The smoothing functions G1 and G2 are preferably dispensed with if quantities that are already suitably smoothed are being supplied by the
torque sensor 25 and/or reel changer. - As has already been noted, the quantities c, m, and a are constants. The quantities c and m are the constants of the speed-dependent, linearized friction torque MREIB.
- The constant a is a conversion factor, which is dependent on a speed ratio i between the
drive 16 and roll 17 of thefeed mechanism 15 and on the radius r of theroll 17. The conversion factor is defined as follows: -
- Instead of the
model 24 illustrated inFIG. 4 for computing the actual value XIST for the web tensile stress and/or the web tension, thesimplified model 24′ shown inFIG. 3 can also be used. In themodel 24′, a constant friction torque MREIB=c is used for computing the actual value XIST of the web tensile stress and/or the web tension, so that the speed NIST of thedrive 16 is not needed as an input variable for themodel 24′. Themodel 24′ according toFIG. 3 then determines the actual value XIST of the web tensile stress and/or the web tension as follows: -
X IST =G2 X RW +a*[G1(M MOT)+c] - where
- XIST is the computed actual value of the web tensile stress and/or the web tension,
- XRW is the value of the web tensile stress and/or the value of the web tension of the reel changer,
- MMOT is the motor torque of the drive,
- G1 and G2 are a smoothing functions, (which can be equal to 1 when the smoothing function is not required) and
- a and c are constants.
- As described above with reference to
FIG. 2 , in the preferred embodiment, automatic control of the web tensile stress and/or the web tension is superimposed on the automatic speed control of thedrive 16. In one embodiment, the automatic control of the web tensile stress and/or the web tension is superimposed on automatic control of a state of thedrive 16 of thefeed mechanism 15, in which case thecontrol system 23 for the web tensile stress and/or the web tension then outputs an offset for the setpoint value of the state of thedrive 16 as a correcting variable. In this embodiment, thecontrol system 23 can also adjust a transmission or scaling factor. - In one embodiment of
models FIG. 4 andFIG. 3 , respectively, a moment of inertia of the feed mechanism is considered as a further input variable in order to improve the computation of the actual value XIST of the web tensile stress and/or the web tension when changes in the speed occur. - According to
FIG. 2 , in the preferred embodiment, thecontrol system 23 for the web tensile stress and/or the web tension and themodel 24 for mathematically determining the actual value XIST of the web tensile stress and/or the web tension are integrated in thedrive controller 20. However, it is also possible to realize these units as a separate system outside thedrive controller 20. - The constants a, c, and possibly m of the
models feed mechanism 15 and theprinting unit 10 for determining the parameters, and in this case, thedrive controller 20 is operated with different setpoint values for the web tensile stress at different speeds. In this connection, the torque of the drive or the current of the drive that creates the torque, the speed of the drive, and the web tension are determined by measurement, and the parameters c, m, and a are computed from these measured determinations by numerical optimization. The parameters determined in this way are then used in the model in order to mathematically determine the actual value XIST for the web tensile stress and/or the web tension later in the operation without a measuring device for the web tensile stress. - Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
Claims (12)
1.-10. (canceled)
11. A method for automatically controlling at least one of a web tensile stress and a web tension of a web of printing material drawn into a printing unit by a feed mechanism, the method comprising:
comparing an actual value of at least one of a web tensile stress and a web tension of a web of printing material of a drive of the feed mechanism with a setpoint value of the drive of the feed mechanism;
generating a correction variable for the feed mechanism based at least in part on the deviation of the actual value of the drive of the feed mechanism from the setpoint value of the drive of the feed mechanism; and
computing the actual value of the at least one of the web tensile stress and the web tension based on a model.
12. The method in accordance with claim 10, wherein an input to the model comprises at least one of:
a motor torque of a drive of the feed mechanism
an electric current that creates the motor torque,
a friction torque of the feed mechanism,
a web tensile stress value,
a web tension value supplied by a reel changer located upstream of the feed mechanism,
a quantity that forms the web tensile stress value, and
a quantity that forms the web tension value.
13. The method in accordance with claim 12 , wherein the friction torque of the feed mechanism is a constant friction torque.
14. The method in accordance with claim 13 , wherein the model determines the actual value of at least one of the web tensile stress and the web tension as follows:
X IST =G2X RW a*[G1(M MOT)+c]
X IST =G2X RW a*[G1(M MOT)+c]
where
XIST is the computed actual value of the at least one of the web tensile stress and the web tension,
XRW is the value of at least one of the web tensile stress and the value of the web tension of the reel changer,
MMOT is the motor torque of the drive,
G1 and G2 are smoothing functions, and
a and c are constants.
15. The method in accordance with claim 12 , wherein the friction torque of the feed mechanism is a speed-dependent friction torque and,
the input to the model further comprises the speed of the drive of the feed mechanism.
16. The method in accordance with claim 15 , wherein the model determines the actual value of the at least one of the web tensile stress and the web tension as follows:
X IST =G2(X RW)+a*[G1(M MOT)+m*N IST +c]
X IST =G2(X RW)+a*[G1(M MOT)+m*N IST +c]
where
XIST is the computed actual value of the web tensile stress and/or the web tension,
XRW is the value of the web tensile stress and/or the value of the web tension of the reel changer,
MMOT is the motor torque of the drive,
G1 and G2 are smoothing functions,
NIST is the speed of the drive, and
a, m, and c are constants.
17. The method in accordance with claim 11 , wherein the method further comprises:
superimposing the automatic control of the at least one of the web tensile stress and the web tension on an automatic control of a speed of the drive of the feed mechanism; and
outputting an offset for a setpoint value of the speed of the drive of the feed mechanism as a correcting variable.
18. The method in accordance with claim 11 , wherein the method further comprises:
superimposing the automatic control of the at least one of the web tensile stress and the web tension on an automatic control of a state of the drive of the feed mechanism; and
outputting an offset for a setpoint value of the state of the drive of the feed mechanism as a correcting variable.
19. A device for automatically controlling the at least one of a web tensile stress and a web tension of a web of printing material to be drawn into a printing unit by a feed mechanism, the device comprising:
a control system for the at least one of the web tensile stress and the web tension configured to generate a correcting variable for the feed mechanism as a function of a deviation of an actual value of the at least one of the web tensile stress and the web tension from a setpoint value of the at least one of the web tensile stress and the web tension,
wherein the device is further configured to determine the actual value the at least one of the web tensile stress and the web tension based on a model.
20. A device in accordance with claim 19 , wherein the device for automatic controlling the at least one of a web tensile stress and a web tension is integrated in a drive controller of a drive of the feed mechanism.
21. The method in accordance with claim 15 , wherein the speed-dependent friction torque is linearized.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006061252.3 | 2006-12-22 | ||
DE102006061252A DE102006061252A1 (en) | 2006-12-22 | 2006-12-22 | Method and device for controlling a feeder |
PCT/EP2007/011272 WO2008077582A1 (en) | 2006-12-22 | 2007-12-20 | Method and device for the control of a feed mechanism |
Publications (1)
Publication Number | Publication Date |
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US20100089962A1 true US20100089962A1 (en) | 2010-04-15 |
Family
ID=39241587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/520,763 Abandoned US20100089962A1 (en) | 2006-12-22 | 2007-12-20 | Method and Device for the Control of a Feed Mechanism |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100089962A1 (en) |
EP (1) | EP2203370B1 (en) |
CN (1) | CN101583550B (en) |
CH (1) | CH701390B1 (en) |
DE (1) | DE102006061252A1 (en) |
WO (1) | WO2008077582A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8662626B2 (en) | 2009-11-30 | 2014-03-04 | Eastman Kodak Company | Device and method for controlling the tension of a substrate web |
US20140132698A1 (en) * | 2012-11-09 | 2014-05-15 | Markem-Imaje Limited | Tape Drive and Method of Operation of a Tape Drive |
US9145000B2 (en) | 2013-02-13 | 2015-09-29 | Dover Europe Sàrl | Printing apparatus and method of operating a printing apparatus |
US9238375B2 (en) | 2013-02-12 | 2016-01-19 | Dover Europe Sàrl | Tape drive and method of operation |
US9272531B2 (en) | 2013-02-13 | 2016-03-01 | Dover Europe Sarl | Tape drive and method of operation of a tape drive |
US9340052B2 (en) | 2011-08-10 | 2016-05-17 | Markem-Imaje Industries Limited | Motor control system |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009028597A1 (en) | 2009-08-17 | 2011-02-24 | Manroland Ag | Method for controlling tension of paper web in rotary printing machine, involves influencing drawing roller and roller groups by control, such that detected actual-web tension values correspond to reference-web tension values |
DE102010050821A1 (en) | 2010-11-09 | 2012-05-10 | Robert Bosch Gmbh | Method for regulating web tension in a web tension section for processing machine, involves determining actual-web tension in one web tension section, on basis of determined web tension of web tension section |
EP3445392A1 (en) | 2016-04-22 | 2019-02-27 | CureVac AG | Rna encoding a tumor antigen |
EP3416010B1 (en) * | 2017-06-12 | 2020-11-25 | Siemens Aktiengesellschaft | Method and device for determining the tension in a web, computer program product, industrial installation and production machine |
EP3805884A1 (en) * | 2019-10-11 | 2021-04-14 | Siemens Aktiengesellschaft | Method for determining and / or classifying a sheet state of a sheet-like material, computer program product, device for the production and industrial installation |
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- 2007-12-20 EP EP07856995.1A patent/EP2203370B1/en not_active Revoked
- 2007-12-20 CN CN2007800476020A patent/CN101583550B/en not_active Expired - Fee Related
- 2007-12-20 US US12/520,763 patent/US20100089962A1/en not_active Abandoned
- 2007-12-20 WO PCT/EP2007/011272 patent/WO2008077582A1/en active Application Filing
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8662626B2 (en) | 2009-11-30 | 2014-03-04 | Eastman Kodak Company | Device and method for controlling the tension of a substrate web |
US9340052B2 (en) | 2011-08-10 | 2016-05-17 | Markem-Imaje Industries Limited | Motor control system |
US9975366B2 (en) | 2011-08-10 | 2018-05-22 | Markem-Imaje Industries Limited | Motor control system |
US20140132698A1 (en) * | 2012-11-09 | 2014-05-15 | Markem-Imaje Limited | Tape Drive and Method of Operation of a Tape Drive |
US9144999B2 (en) * | 2012-11-09 | 2015-09-29 | Dover Europe Sàrl | Tape drive and method of operation of a tape drive |
US9238375B2 (en) | 2013-02-12 | 2016-01-19 | Dover Europe Sàrl | Tape drive and method of operation |
US9145000B2 (en) | 2013-02-13 | 2015-09-29 | Dover Europe Sàrl | Printing apparatus and method of operating a printing apparatus |
US9272531B2 (en) | 2013-02-13 | 2016-03-01 | Dover Europe Sarl | Tape drive and method of operation of a tape drive |
Also Published As
Publication number | Publication date |
---|---|
CN101583550B (en) | 2011-12-21 |
EP2203370A1 (en) | 2010-07-07 |
EP2203370B1 (en) | 2013-10-23 |
WO2008077582A1 (en) | 2008-07-03 |
CN101583550A (en) | 2009-11-18 |
DE102006061252A1 (en) | 2008-06-26 |
CH701390B1 (en) | 2011-01-14 |
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