Title of Invention

METHOD FOR REGULATING A REEL CHANGER

Abstract The invention relates to a method for regulating a reel changer of a web-fed press, having a cascade control loop comprising a current controller (21) and a rotational speed controller (22) superimposed on the current controller (21) to regulate the rotational speed of a motor (14) driving a printing material reel (10) and thereof to regulate the circumferential speed of the printing material reel (10) and the web speed of a printing material web (12) to be unwound from the printing material roll (10), and having a position controller (29) superimposed on the cascade control loop comprising the current controller (21) and rotational speed controller (22), with the effect of a further cascade, for a dancer roll (16) acting on the unwound printing material web (12), the dancer roll (16) being used to provide to a defined web tension. According to the invention: a) during a reel change, in order to synchronize the circumferential speed of a new printing material reel with the circumferential speed of the printing material reel that is running out, the position controller (29) of the dancer roll (16) is deactivated and, in order to form a set point (28) of the current controller (21), the differentiated set point (24) of the rotational speed controller (22) is fed forward to an output variable (27) of the rotational speed controller (22) as a feedforward control component; b) after the reel change has been carried out, the position controller (29) of the dancer roll (16) is activated and in, order to from the set point (28) of the current controller (21), the differentiated actual value (36) of the position controller (29) is fed forward to the output variable (27) of the rotational controller 922) as a feedforward control component.
Full Text FORM 2
THE PATENT ACT 1970 (39 of 1970)
The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10, and rule 13)
1. TITLE OF INVENTION
REEL CHANGER FOR A WEB FED PRESS AND METHOD FOR REGULATING A REEL CHANGE

APPLICANT(S)
a) Name
b) Nationality
c) Address

MAN ROLAND DRUCKMASCHINEN AG GERMAN Company MUHLHEIMER STRASSE 341 D-63075 OFFENBACH AM MAIN GERMANY

3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed : -

MAN Roland Dructanaschinncs. AG
Reel changer for a web-fed press and method for regulating a reel change
The invention relates to a method for regulating the reel changer of a wet-fed press according to the precharacterizing ;' '. H:<:.t claim farther the i relates to a reel changer for press.> Reel changers of web-feci presses primarily perform three main o^shs, firstly the unwinding of a printing material web from a reel of printing material at a defined web speed, secondly the application of a defined v/eb tension to the printing material wee to he unwound and, thirdly, the execution of a reel change between a. printing material reel that is running out and a new printing material reel. Reel changers are also called reel carriers. As the printing material web is unwound from the printing materiel reel, the maintenance of the defined web speed and the application of the defined web tension are of primary importance. if, on die other hand, a reel change between a printing material reel that is running out and a new printing materia.! reel is to be carried out, then the new printing material reel must he accelerated to the circumferential speed of the printing material reel that is running out, in order in this way to synchronize the web speeds of the respective printing mat erial webs.
The maintenance of a defined web speed and also a defined web tension of the printing material web to be unwound from the printing material reel, and also the acceleracion of a new printing material reel to ens circumferential speed of a printing material reel that is running out, is carried out during the i^el change by using a regulation method.
2~

It is already known from practice to use a cascace
control loop con'pri sing a current: controller and a rotational speed controller superimposed en the current controller co regulate the rotational speed of a motor driving a printing .material reel and therefore to regulate the circumferential speed of the printing material reel and the web speed of the printing material web to be unwound. Furthermore, it is known from practice to provide the defined web tension by means of a dancer roll which presses with a defined force into a loop of the printing material web unwound from the printing materia! reel. In this case, the dancer roll is to be kept in a central position by means of a position controller, that is to say the web speed of the printing material before or upstream of the dancer roll is to correspond to the web speed of the printing material web after or down. stream of the dancer roll. To this end, a position controller which keeps the dancer roil in the defined central position is superimposed on the cascade control loop comprising' the current controller and rotational speed controller, with the effect of a further cascade.
The above control concept, known from the prior art, for a reel changer tends to oscillations, which have a detrimental effect on the quality of control. The reason for this, inter alia, is that both the printing material reel and the dancer roll are characterized by an integral control response, -which can ultimately lead to control oscillations.
Taking this as a starting point, the present invention is based on the problem of providing a novel type of method for regulating a reel changer for a web-fed press and also a novel type of reel changer.
This problem is solved by a method for controlling a
reel ■-'...;.•.;»: ." ' :r. ^b ~fed press c;^ i; i„, ::c Clone 1.
According to the invention, during a real change, in






3



order to synchronise the circumferential speed of a new printing material reel with the circumferential speed of the printing material reel that is running out, the position controller of the dancer roil is deactivated and. in order to form a set; point of. the current controller. the differentia Led set point of the rotational speed controller is fed forward to an output variable of the rotational speed controller as a feed forward control component; after the reel change has been carried out, in the course of or during unwinding of the printing material web, the position controller of the. dancer roll .u activated and, in ozcl&x to form the set point of the current controller, the differentiated actual value of the position controller is fed forward to the output variable of the rotational speed controller as a feed forward control component.
In the spirit of the present invention, it is proposed, during the reel change and with the position controller of the dancer roil deactivated, to use the time differential of, the set point of the rotational speed controller as a feed forward component when forming the set point for the current controller of the cascade control loop comprising current controller and rotational speed controller. After the reel change has been carried out, with the position controller of the dancer roll activated, the tirae differential of the actual value of the position controller is used as a feed forward component when forming the set point of the current controller In this case, both during the reel change and after the reel change has been carried out, control oscillations can be counteracted, which means that a good control behaviour c.5.n be achieved. Furthermore, a robust control behaviour can be implemented which, is unaffected by mismatching between the motor and privrcing material reel... such as can. occur in the case, of large printing material reels. In the case of large mass inertia values of the printing
4

material reels, if: i^: possible to use relatively small motors with low output. This is a further, economic advantage of the method according to the invention.
The reel changer according to the invention of a. web-fed press is defined in Claim 6.
Preferred developments of. the invention emerge trorvi the .subclaims and the following description. An exemplary embodiment of the invention, without being restricted thereto, will be explained in more detail by using the drawing,. i r. which:
Fig. 1 shows a block: diagram to illustrate the method according to the invention for regulating a reel changer of 2 web-fed press.
In the following text, the present invention will be described, in greater detail with reference to Fig. 1.
Fig. 1 shows a block diagram of a control structure according to the invention for a reel changer of a web-fed rotary press.. according to Fig. 1 a printing material web 12 being unwound from a printing material reel 10 in tlia direction of the arrow 11 and being fed to a web-fed rotary press in the direction of the arrow 13. The printing material reel 10 is mounted on a reel changer, not illustrated in detail, a reel changer also being called a reel carrier. The printing material reel 10 is driven by £ motor 14, it being possible for the circumferential speed of the printing material reel. 10 and therefore the -web speed of the printing material web 12 to be unwound to be calculated from the rotational speed of the motor 14 and the radius or diameter of the printing material reel 10. Since the radius of the printing material reel 10 changes as the printing material web 12 is unwound. the rotational sp 5~

The printing- material web 12 unwound from the printing material real 10 is led to roils 15, 16 and 17, forming a loop 13, the roils 15 and 17 being deflection roils and the roll 16 being what is known as a dancer roll. The dancer roll 16 presses into the loop 18 with s defined force in the director. of the arrow 19 in order to provide a. defined web tension. The web speed of the printing material web 12 is to be exactly es Ic.rye before or upstream of the dancer roil 16 and after or downstream of the dancer roll 16. If this is the case, then the dancer roll 16 is in tne central position illustrated in Fig. 1. If, however, a differential speed occurs at the dancer, roll 16. thon the dancer roll 16 will by deflected either upwards or downwards in the direction of' th The aim of the control structure illustrated m Fig. 1 is to unwind the printing material web 12 from the printing material reel 10 at a defined wet speed and, in the process, to keep the dancer roll 16 in its central position, so that no differentia] speed occurs at the dancer roil 16, which produces lh.2 web tension on the printing material web 12.
In order to regulate the circumferential speed of the printing material web 10 and therefore the web speed of the printing material web 12, the rotational speed of the motor 14 driving the printing material web 10 is regulated with the aid of a cascade control loop comprising a current controller 21 and a rotational speed controller 22 superimposed on the current controller 21. According to Fig. 1, a set point 21 for the web speed of the printing material web 12 and therefore for the circumferential speed of the printing material, real 10 is predefined., this set point 23 being calculated with an auxiliary variable 25 in -order to provide a set point 24 for the rotational speed
6

controller 22 of the motor 14. The auxiliary variable 25 is the diameter of the printing material reel 10 which, as already mentioned, changes continuously as the. printing material web 12 is unwound from the printing material reel 10, The set point 2 4 for the rotational speed controller 22 is calculated by using an actual value 26 of the mote.?: rotational speed registered on the notor 14, the rotational speed controller 22 providing an output variable 21 from which the set point 28 for the current controller 21 is generated or determined.
A position controller 29 for the dancer roil 16 is superimposed on the cascade control loop comprising the current controller 21 ^nd the rotational speed controller 22, with the effect of a further cascade. With the aid of the position controller 29, the dancer roll 16, which is used to provide a defined web tension, is kept in its central position, so that accordingly, no differential speed occurs at the dancer roll 16. The web speed before the dancer roil 16 is therefore intended to be exactly as large as the web speed after the dancer roil 15. To this end, the position of the dancer roll 16 is monitored with the aid of a sensor 20, and a corresponding actual value 3 6 is supplied to the position controller 29.
Current controller 21 and rotational speed controller 22 are preferably implemented by ?l controllers. The position controller 29, on the other hand, is preferably implemented by a PID controller. The J. term of the position controller 2S designed as a PID controller preferably ensures that, even \-jhsn there is an erroneous auxiliary variable 25, that is to say when the diameter of the printing material reel 1C is determined, incorrectly, an exact central position of the dancer roll 16 can be. maintained.
7

According to Fig. i. ' the position controller 29 of the dancer roll 16 can be activated and deactivated via a switch 31. In order to carry cut a reel change, the position controller 29 of the dancer roll 16 is deactivated but is activated after the reel change has been carried out. Fig. 1 shows the control structure with the switch 31 open,, that is to say in a state present for performing a reel change.
During a reel change or in order to carry out a reel change, in order to form the set point 28 for the current controller 21, the time differential of the set point 24 of thy rotational speed controller 22 is fed forward to the output variable 2? of the rotational zpezd controller 22. Thus, Fig. 1 shows a differential element 32 to which, during a reel, change, as a result of the position of the switch 33, the sst point 2 4 of the rotational speed controller 22 is fed as input variable, the differential element 32 then providing the time differential of the set point 24 of the rotational speed controller 22 as an output variable 34. The output variable 34 is calculated with an ■auxiliary variable 35, specifically multiplied and then added to the output variable 27 of the rotational speed controller 22, in order to form the set point 28 of the current controller 21 in this way. The auxiliary variable 35 is the cube of the radius of the printing material reel 10 multiplied by the reel width of the same.
In order to carry out a reel change and, accordingly, to synchronize the circumferential speed of a new printing material reel with the circumferential speed of the printing material reel that is running cut,- with the position controller 29 of the dancer roll 16 deactivated, the rotational speed controller 22 of the motor 14 is accordingly relieved of load by the current controller 21 being provided with a feed forward component, the feed forward component then bring the
8

time differential of the set point 24 of the rotational speed controller 22. In this way, instantaneous feed forward is provided during the reel change, so that a change in the speed of the press or a set point ramp can be fed forward relatively exactly during the synchronization of the circumferential speed of new printing material reel with printing material reel running out, by which weans a tendency to oscillation is counteracted.
After the reel change has been carried out, in the sense of the invention the control strategy is changed by the two switches 31 and 32 of Fig. 1 being changed over; accordingly, as a result of closing the switch 21, the position controller 29 of the dancer roll 16 is activated and, moreover, by changing over the switch 33, a changed feed forward component is fed forward, to the set point 28 of the current controller 21.
After the reel change has been carried out, the time differential of the output variable 35 from. the sensor 3 0 is specifically provided as feed forward component for the current controller 21. The output variable 3 6 from the sensor 30 is the actual value from the position controller 2$ of the dancer roil 15. Accordingly, after the reel change has beer, carried out, in order to form the set point 28 of the current controller 21 with the position controller 29 activated, the differentiated actual value 3c from the position controller 29 is fed forward to the output variable 21 of the rotational speed controller 22 as feed forward component, in this case, too, the output signal 34 provided by the differentiation element 32 is calculated with the auxiliary variable 35, which is once more the cube of the radius of the printing material reel multiplied by the reel width of the same.
As a result of. the changeover according to the invention of the feed forward component to the time
9

differential of the position signal of the dancer roll after the reel change has beer, carried out, the tendency of the dancer roll to oscillate can be reduced. In the way, the dancer roll having the control response according to the invention is excited. cc considerably fewer control oscillations. Furthermore, th In conclusion.- it should be pointed our. that the method according to the .invention can be used not only when unwinding a printing material web from a printing material reel but., in an analogous way. also during winding or rewinding .
10

List of reference symbols
printing material reel
arrow'.-
1-printing material'- web
Arrow
?lotor
Derlscticn roll
Dancer roll
Deri -setion roll
Loup
Arrow:
Double arrow
Current. controller
Rotational speed controller
Sot point
Set point
Auxi1lary va r i ab 1 e
Actual value
Output variable
Set point
Position controller
Sensor
Switch
Differentiator
Switch
Output variable
Auxiliary variable
Cutout variable
11

Claims
Method for regulating a reel changer of a web-fee! press, having a cascade control loop cor.ipris.ing a current controller (21! and a rotational speed controller (22) superimposed on the current controller (21; to regulate the rotational speed, of a motor (14) driving a printing material reel (10) and there are to regulate the circumferential speed of the printing material reel (lO and the web speed o-ii a printing material web (12) to be unwound from the printing material roil (10':, and having s. position controller (29; superimposed on the cascade concrci loop comprising the current controller -21) and rotational speed controller (22), with the effect of a further cascade, for a dancer roll a) during a reel change, in order no synchronize
the circur.feren.tial speed of a new printing
material reel with the circumferential speed of
the printing material reel that is running out,
the position controller (29) of the dancer roll
(16) is deactivated and, in order to fen- a set
point (28) of the current controller '21; , the differentiated sec point (24) of the rotational speed controller (22) is fed forward to an output. variable (27) of the rotational speed controller (22) as s. feed forward- control component;
b) after the reel change has been, carried cut, the
position controller (2 9) of th-~ dancer roil ;16)
is activated and, in order to form the set; point
(28) of the current controller !2l), the
differentiated actual value i.36: of the position
controller (29) is fed forward to the output
variable (27.) of the rotational speed controller
(22) as a feed forward control component.
12

Method according to Claim 1, characterized in
that, during the reel change, in order to form the
set point. (28) of the current controller (21), the
time differential (34) of the set point (24) of
the rotational speed controller (22) is fed
forward co the output variable !27) of the
rotational speed controller (22j .
Method according to Claim .': or 2, characterized in that, during the reel change, in order to form the set point (23) of the current controller (21), the differential (34) of the set point (24) of the rotational speed controller (22) is fed forward to the output variable (27) of the rotational speed centraller (22) as a feed forward component in such a way that the differential (34) of the set point (24) of . the rotational speed controller (22), before the same is fed forward, is calculated with the cube of the radius of the printing material reel (10) and the reel width of the same.
Method according to one or more of Claims 1 to 3, characterized in that, after the reel change has been carried out, in order to form the set point (28) of the current controller (21), the time differential (34) of the actual value (36) of the position controller (29) is fed forward to. the output variable (27) of the rotational speed controller (22).
Method according to one or more of Claims 1 to 4, characterized in that, after the reel change has been carried out, in order to for;:- the sec point (28) of the current controller (21), the differential (34) of the actual value (36) of the position controller (29) is fed forward :o the output variable (27) of the rotational speed-controller (22) as a feed forward component in such
13

a way that, the differential (34) of the actual value (36) of the current controller (29), before the same is fed forward, is calculated with the cube of the radius of the printing material reel (10) and the r>=el width of the same.
6. Reel changer for a web-fed press, characterised toy
a control device for carrying out the method according to one or more o£ Claims 1 to 5 ,

Dated this 25th day of January, 2006


HIRAL CHANDRAKANT JOSHI AGENT FOR MAN ROLAND DRUCKMASCHINEN AG

14

Abstract
The invention relates to a method for regulating a reel changer of a web-fed press, having a cascade control loop comprising a current controller (21) and a rotational speed controller (22) superimposed on the current controller (21) to regulate the rotational speed of a motor (14) driving a printing material reel (10) and therefore to regulate the circumferential speed of the printing material reel .(10! and the web speed of a printing material web (12) to be unwound from the printing material roll (10), and having a position controller (29) superimposed on the cascade control loop comprising the current controller (21; and rotational speed controller (22), with the effect of a further cascade, for a dancer roll (165 acting on the unwound printing material web (12), the dancer roll (16) being used to provide a defined web tension. According to the invention; a) during a reel change, in order to synchronize che circumferential speed cf a new printing material reel with the circumferential speed of the printing material reel that is running out, the position controller (29) of the dancer roll {15} is deactivated and, in order to form a set point (28) of the current controller (21), the differentiated set point (24) of the rotational speed controller (22) is fed forward to an output variable (27 5 of the rotational ?jpeec controller (22) as a feedforward control component; b) after the reel change has been carried out, the position controller (29) of the dancer roll (IS; is activated and, in order to form the set point (28) of the current controller (2.1), the differentiated actual value (36) of the position controller (29) is fed forward to the output variable (27) of the rotational speed controller (22) as a feedforward control component.
(Fiq. 1)

TO
The controller of Patent
The Patent office
Mumbai
15

Documents:

142-MUM-2006-ABSTRACT(7-1-2014).pdf

142-MUM-2006-ABSTRACT(8-11-2011).pdf

142-mum-2006-abstract.doc

142-mum-2006-abstract.pdf

142-MUM-2006-CANCELLED PAGES(8-11-2011).pdf

142-MUM-2006-CLAIMS(AMENDED)-(7-1-2014).pdf

142-MUM-2006-CLAIMS(AMENDED)-(8-11-2011).pdf

142-MUM-2006-CLAIMS(MARKED COPY)-(7-1-2014).pdf

142-mum-2006-claims.doc

142-mum-2006-claims.pdf

142-MUM-2006-CORRESPONDENCE(17-11-2008).pdf

142-mum-2006-correspondence(2-9-2008).pdf

142-MUM-2006-CORRESPONDENCE(3-2-2009).pdf

142-MUM-2006-CORRESPONDENCE(8-11-2011).pdf

142-MUM-2006-CORRESPONDENCE(9-9-2008).pdf

142-mum-2006-correspondence-received-ver-090306.pdf

142-mum-2006-correspondence-received-ver-250106.pdf

142-mum-2006-description (complete).pdf

142-mum-2006-drawings.pdf

142-MUM-2006-EP DOCUMENT(8-11-2011).pdf

142-mum-2006-form 1(27-4-2006).pdf

142-mum-2006-form 1(30-1-2006).pdf

142-MUM-2006-FORM 1(7-1-2014).pdf

142-MUM-2006-FORM 1(9-9-2008).pdf

142-mum-2006-form 13(9-9-2008).pdf

142-mum-2006-form 18(20-2-2008).pdf

142-MUM-2006-FORM 18(9-9-2008).pdf

142-mum-2006-form 2(title page)-(30-1-2006).pdf

142-MUM-2006-FORM 2(TITLE PAGE)-(7-1-2014).pdf

142-MUM-2006-FORM 2(TITLE PAGE)-(9-9-2008).pdf

142-mum-2006-form 3(30-1-2006).pdf

142-MUM-2006-FORM 3(8-11-2011).pdf

142-MUM-2006-FORM 3(9-9-2008).pdf

142-mum-2006-form 5(30-1-2006).pdf

142-MUM-2006-FORM 5(9-9-2008).pdf

142-mum-2006-form-1.pdf

142-mum-2006-form-2.doc

142-mum-2006-form-2.pdf

142-mum-2006-form-26.pdf

142-mum-2006-form-3.pdf

142-mum-2006-form-5.pdf

142-MUM-2006-GENERAL POWER OF ATTORNEY(3-2-2009).pdf

142-mum-2006-general power of attorney(30-1-2006).pdf

142-MUM-2006-GENERAL POWER OF ATTORNEY(7-1-2014).pdf

142-MUM-2006-OTHER DOCUMENT(17-11-2008).pdf

142-MUM-2006-OTHER DOCUMENT(7-1-2014).pdf

142-MUM-2006-PETITION UNDER RULE 137(8-11-2011).pdf

142-MUM-2006-REPLY TO EXAMINATION REPORT(8-11-2011).pdf

142-MUM-2006-REPLY TO HEARING(7-1-2014).pdf

142-MUM-2006-SPECIFICATION(AMENDED)-(8-11-2011).pdf

abstract1.jpg


Patent Number 258554
Indian Patent Application Number 142/MUM/2006
PG Journal Number 04/2014
Publication Date 24-Jan-2014
Grant Date 21-Jan-2014
Date of Filing 30-Jan-2006
Name of Patentee MANROLAND AG
Applicant Address MUEHLHEIMER STRASSE 341, 63075 OFFENBACH
Inventors:
# Inventor's Name Inventor's Address
1 BERND MEHLIS ANNENSTRASSE 14 D-08529 PLAUEN
2 RAIMOND POSSELT SCHUTZENSTRASSE 79 D-08468 REICHENBACH
3 MARKUS SCHARF GEORG-BENJAMIN-STRASSE75 D-08529 PLAUNE
PCT International Classification Number B65H23/185
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10 2005008223.8 2005-02-22 Germany