CN111433397B

CN111433397B - Method for operating a winding machine for rewinding a cop of a previous ring spinning machine

Info

Publication number: CN111433397B
Application number: CN201880078850.XA
Authority: CN
Inventors: B.英戈尔德
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2017-12-08
Filing date: 2018-11-22
Publication date: 2023-04-04
Anticipated expiration: 2038-11-22
Also published as: EP3720996A1; WO2019111090A1; JP2021505782A; CH714412A1; CN111433397A

Abstract

A method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) having a plurality of spindles (24) which are arranged on spindle carriers (22) and which each comprise an electric drive (9) is disclosed. Each electric drive (9) has a decentralized control module (10) which cooperates with the electric drive (9) and has means for communication (10) with a superordinate central control device (12) by means of a data bus (13, 14). According to the invention, a decentralized control module (10) of the single spindle drive records information about the shape or configuration of the cop or about the thread being built. This information is transmitted to the winding machine (8), and the winding machine (24) takes the received information into account when unwinding the cops (7) and producing cross-wound bobbins (25).

Description

Method for operating a winding machine for rewinding a bobbin of a previous ring spinning machine

Technical Field

The invention relates to a method for operating a winding machine for rewinding a cop of a ring spinning machine according to the preamble of the independent patent claim. The invention also relates to a correspondingly equipped ring spinning machine.

Background

Ring spinning machines with a single-spindle drive as an alternative to the belt drive have been known for a long time. Accordingly, there are numerous publications in this field which are directed in particular to the drive design of such spindle devices or to the fastening of such spindle devices to the machine frame, i.e. to the spindle carrier base. CH698768A2 discloses, for example, such a spinning machine with a single spindle drive.

The drive device comprises a rotationally effective electric drive motor which acts on the thread, fiber web or knitted fabric by means of a manipulator, for example in the form of a guide wheel, arranged on the end face of the shaft of the drive motor. Different external sensors are usually also provided, which are used in particular to detect the position of the thread, fiber, web or knitted fabric, and additional actuator elements are also provided. These additional actuator elements are used, for example, for pretensioning or positioning threads, fibers, webs or knits. Rotationally effective electric drive motors are generally arranged in a spring-loaded manner in order to protect the drive against resonance problems on the one hand and to ensure sufficient running stability and service life even at high rotational speeds on the other hand.

For controlling or regulating the electric drive motor, separate control modules are provided. Furthermore, the decentralized control module, which is functionally and usually also spatially provided as part of the drive, cooperates with the external sensors and the additional actuator elements. The decentralized control modules are connected to a superordinate central control unit via suitable communication means. The central control device is in particular a device for coordinating a plurality of driving devices of the textile machine. The use of such drive devices in textile machines has been basically examined for many years.

Document EP2999096A2 relates to a textile machine having at least one drive device, which drive device comprises: a rotationally active electric drive motor having a stator which is at any time partially comprised by a housing of the drive motor, the stator having at least one winding, the electric drive motor having a rotor which can be rotationally fastened to a shaft of the drive motor relative to the stator, and the electric drive motor having at least one bearing for the shaft; the drive device comprises at least an elastic device for supporting the individual functional components of the drive motor and a decentralized control module assigned to the drive motor, which decentralized control module cooperates on the one hand with the drive motor and on the other hand with at least one sensor of the drive device and has a device for communication with a superordinate central control device, wherein at least one bearing provided for supporting the shaft is telescopically supported on a housing relative to a stator by means of the elastic device, such that: the shaft and the rotor are movably fastened relative to the stator, a synchronous machine is provided as a drive motor, and the position of the shaft relative to the housing can be detected by means of a first sensor and/or the angle of rotation of the shaft can be detected by means of a second sensor.

The spinning cop produced at the workstation of such a ring spinning machine, which contains a relatively small amount of yarn, is wound into a voluminous cross-wound bobbin at the workstation of the winder in the next process. Different methods for changing the winding speed of a winding machine are known.

In the known device according to CH669177, the spooling speed and thereby also the yarn unwinding speed is controlled as a function of the amount of yarn remaining on the spinning cop. In this device, the winding is therefore first carried out at a relatively high winding speed at the beginning of the spooling process, but the winding speed is reduced to a non-critical level at the end of the spooling process. The spooling speed corresponds to the rotational speed of the tube to be wound. With this known method, although it is possible to limit the continuously increasing yarn tension during the spooling process without corresponding measures and thereby also to significantly reduce yarn breakage, the reduction in spooling speed during the last third of the spooling process leads to a relatively low average spooling speed, which has an adverse effect on the efficiency of such a spooling machine.

US4805846 also discloses an automatic winder which can adapt the rotational speed of each bobbin station such that yarn breakage is prevented.

In this context, it is also known that: during the winding process, the hairiness of the yarn to be rewound is monitored by means of a clearer and the winding speed is reduced when a limit value for the hairiness is reached or exceeded.

EP2388222 discloses a method for producing spinning cops whose yarn loops arranged on cops sleeves have a yarn length and a loop size set by a spinning program of a ring spinning machine, and EP2388222 discloses a ring spinning machine for carrying out the method. In EP2388222 there is specified: the optimal orientation and size of the loops of the cop to be manufactured on the stations of a ring spinning machine is determined by: the unwinding performance of at least one spinning cop is evaluated when it is rewound on a workstation of a winder.

WO9215737 discloses a method and apparatus for controlling an on-line facility. This document relates to the cooperation of, for example, a ring spinning machine at any time with an on-line process stage of an automatic operating machine assigned to the ring spinning machine and a winder on-line with the ring spinning machine, which winder is equipped with a clearer in terms of its own, which clearer is suitable for detecting yarn quality.

However, this embodiment is disadvantageous in that: the additional information of the individual spindle drives of the ring spinning machine is not used on the winding machine, for example, on which it must be individually checked whether defective parts are present in order to remove them. Furthermore, it is disadvantageous that, for each individual cop, the following must be ascertained during the return movement: whether the winder has completely unwound the cop or whether there may be residue left on the cop.

Disclosure of Invention

In this respect, the object of the invention is to provide a method for operating a winding machine, to which a ring spinning machine having a single spindle drive is assigned, which winding machine has improved rewinding properties for the cop.

The object of the invention is also to provide a ring spinning machine with a single spindle drive, in which additional information about the shape and structure of the cop and about the yarn quality etc. is provided for the subsequent winding machine.

These objects are solved by a method according to the preamble of the independent method claim by:

the decentralized control module of the single spindle drive collects information about the shape or configuration of the cop or about the yarn built;

transmitting the information to a winder via an interface; and also

The winder takes into account the information received when unwinding the tube yarn and manufacturing the cross-wound bobbin.

The discrete control modules of the single spindle drive can be transmitted via the interface of the winding machine:

the length of the yarn on the cop;

the number and location of yarn breaks within the length of the yarn;

the number and location of interruption points during cop manufacture;

the shape and configuration of the cop;

degree of unevenness in the hairiness degree of the yarn;

the degree of non-uniformity in the yarn construction,

as information for each individual cop.

Advantageously, according to the invention, this information can be determined directly on the single spindle drive; this is achieved more precisely, more comprehensively and more rapidly than in the case of the embodiments mentioned in the prior art.

Advantageously, therefore, the winder can:

adapting the speed profile of the rewinding of the tube yarn according to the information of the single spindle drive; and/or

Shearing off the defective part; and/or

Taking into account the yarn stress of the cop during rewinding; and/or

Take into account the shape of the cop during rewinding.

Thereby, advantageously, the rewinding work can be designed more efficiently.

The yarn length of the yarn wound onto the cop can likewise be conveyed and the winder can thereby ascertain whether the cop has been completely unwound. Thus, all the spools not completely unwound may be fed to the winder again.

Advantageously, in the communication structure of the ring spinning machine, at least one grouping module can be present, which is assigned to a plurality of decentralized control modules and which, from the assigned decentralized control module of the grouping module, queries information about the shape or structure of the cop or about the yarn being built and which is sent from the assigned decentralized control module to the grouping module and is evaluated there. Alternatively, the information can be analyzed by the assigned decentralized control module and sent by the control module to the grouping module assigned to the decentralized control module.

Within the scope of the invention, an automated or manual conveying system can be used as the conveying system from the ring spinning machine to the winding machine. Thus, for example, the cop may be transported from the ring spinning machine to the winder by means of Peg trays (Peg-Tray) or manually by means of a vehicle.

These objects are also achieved by a corresponding ring spinning machine which is characterized in that;

the decentralized control modules comprise means for determining information about the shape or configuration of the cop or about the yarn being built; and moreover

The decentralized control modules comprise interfaces for the centralized transmission of the collected information to the spoolers.

Advantageously, according to the invention, this information can be determined directly on the single spindle drive; this is achieved more accurately, more comprehensively and more quickly than in the case of the embodiments mentioned in the prior art. Between these decentralized control modules and the superordinate central control device, there can be grouping modules which are assigned to the decentralized control modules and forward information corresponding thereto.

Drawings

Other advantages of the present invention are described in the following examples, in which

FIG. 1 schematically shows a ring spinning machine with a single-spindle drive;

FIG. 2 schematically shows a communication system of a ring spinning machine; while

Fig. 3 schematically shows a ring spinning machine connected to a winding machine.

Only the features important for the present invention are shown. In the different figures, the same features are provided with the same reference numerals.

Detailed Description

Fig. 1 schematically shows a ring spinning machine 1 according to the invention, which has a plurality of spinning stations 2 arranged next to one another. These spinning stations 2 are arranged in the longitudinal direction x of the ring spinning machine 1 at the head 3 ₁ And the tail 3 ₂ In the meantime. Head 3 of ring spinning machine 1 ₁ And tail 3 ₂ May include bearings, drives, controls, etc. required for operation of the machine. As is further seen, for example, at two spinning stations 2, which are shown schematically in fig. 1, each spinning station 2 consists of a roving bobbin 4, which is located above a drawing device 5 and on which a roving 6 is wound. From the roving bobbin 4 the roving 6 passes a stretching device 5 where it is stretched in order to be subsequently guided to a yarn forming element. The wrap-around traveler or traveller guides the yarn produced onto a cop 7, which is placed on a driven spindle 8.

Fig. 2 schematically shows a communication system of the ring spinning machine 1. For driving the spindles 8, the ring spinning machine 1 has a single spindle drive 9, which drives the spindles 8. As the single-spindle drive 9, an electric drive, such as a synchronous motor, an asynchronous motor, a brushless dc motor or the like or an equivalent motor, is used. Each single spindle drive 9 is assigned a separate control module 10.

The spindles 8, the single-spindle drive 9 and the control module 10 are arranged on a spindle carrier 22 of the ring spinning machine 1. The spindle carrier 22 is only schematically shown and the components located on the spindle carrier 22 are correspondingly located within the element in fig. 2. The connection of the electric drive 9 has connection cables which merge at the spindle carrier 22 and are connected to a power supply at one end of the spindle carrier. Advantageously, the connection to the electric drive 9 is realized by a plug connection.

The control module 10 has the following tasks; the single-spindle drive 9 is monitored and the instructions from the superordinate control are put into effect. Within the scope of the invention, it is conceivable: a plurality of decentralized control modules 10 of the single-spindle drive 9 are combined. A plurality of decentralized control modules 10, for example 64 control modules 10, communicate with an upper packet control module 11, two of which are shown by way of example in fig. 2. However, the number of grouped control modules 11 will depend on the number of spindles 8, as this is indicated with the dashed control modules 10. The packet module 11 processes information from the control module 10 and forwards the information. A plurality of decentralized group control modules 11 communicate with an upper central control module 12 of the ring spinning machine 1. The central control module 12 is a central machine control device which has all the machine data, which are statistically organized and visualized. For this purpose, a display 20 is connected to the central control module 12. Here, these machine data may be queried by the user through the display 20. It is also possible that: these data are forwarded to the mobile application.

Between the central control module 12 and the group control modules 11 there is a machine data bus 13, while between the group control modules 11 and the decentralized control modules 10 there is a group data bus 14. The packet data bus 14 is responsible for communication between the control module 10 and the packet control module 11; via the packet data bus, commands are transmitted from the packet module 11 to the control module 10 and operating states or measurement data of the electric drive 9 of the spindle 8 are transmitted from the control module 10 to the packet control module 11.

Additionally and independently of the

data buses

13, 14, there is a digital communication network 15 with which the central control module 12 and the decentralized control modules 10 communicate with one another. The time-critical and safety-relevant information is forwarded from the central control means 12 via the packet control module 11 (dashed line) directly to the control module 10 via the communication network 15. Via the communication network 15 all the decentralized control modules 10 of the electric drive 9 can be responded to simultaneously by the central control device 12, so that for example start/stop signals or commands for controlling an acceleration or braking ramp can be transmitted from the central control device 12 to these decentralized control modules 10 via the digital communication network 15.

Fig. 2 also shows command and reporting elements 17, wherein exactly one command and reporting element 17 is assigned to each single-spindle drive 9. These command and reporting elements are arranged in the form of operating elements 17 on the ring rail 23 of the ring spinning machine 1. A plurality of control modules 16 are connected to the command and reporting element 17 via a packet command bus 19 and are superior to these command and reporting elements. The machine instruction bus 18 is responsible for communication between the control module 16 and the central module 12. As soon as the control module 10 detects a deviation from the setpoint value, this information is transmitted via the

bus systems

14, 13, 18, 19 to the associated reporting element 17 and presented there. The operator then has the possibility of entering a command (for example start or stop) on the command element 17 on the ring plate 23, which command is then sent back to the control module 10 via the

bus system

14, 13, 18, 19. It is of course possible that: the control module 10 itself performs an action which makes it possible, for example, to simply stop the spindle in the event of a yarn break.

The decentralized control module 10 of the single spindle drive 9 can determine a yarn break or a creeping spindle on the basis of the power consumption. In the case of mechanical bearings, the rotational speed, the bead ring rotational speed, the state of the bead ring, the operating state of the spindle, the bearing state or bearing damage, the oil level, etc. can be determined on the basis of the current pattern. As long as the spindle 8 is equipped with magnetic bearings, the weight of the cop 7 can additionally be determined by the current consumption of the active magnetic bearings. In the event of a yarn break and a change in the power consumption associated therewith, the determined decentralized control module 10 can report this to the group control module 11. However, the grouping module 11 may also query all allocated distributed control modules 10 in sequence. The information thus obtained is then analyzed in turn and the operating state is determined.

In order to determine the mentioned operating state, the grouping module 11 has (computing) means for analyzing the obtained information. These calculation means comprise means for determining the root mean square value of the power consumption and for transforming the current form. In order to transform the signal from the time domain into the frequency domain, in particular a fourier transform, a wavelet transform or a hilbert-yellow transform with an Empirical Mode Decomposition (Empirical Mode Decomposition) as a main component is used. In the context of a fourier transformation, in particular a short-time fourier transformation, a gabor transformation, a fast fourier transformation or a discrete fourier transformation can be used, which is designed as a discrete cosine transformation or as a discrete sine transformation. In the case of wavelet transform, in particular discrete wavelet transform, fast wavelet transform, wavelet-park transform or stationary wavelet transform is used. Discrete, static characteristics of the signals can also be used and the transformation of these signals in the frequency domain can be dispensed with. In particular random variables such as expectation, absolute deviation, variance, skewness, excess or covariance can be applied. These signals can also be correlated, in particular cross-correlated or auto-correlated. Finally, a combination of the transformed signal and the static feature quantity can be presented. The common objective is, inter alia; in the context of pattern recognition, the actual measurement signal is compared with a reference signal state, wherein the reference signal can be generated from information of one or more adjacent spindles or can be read from a memory. This is achieved in particular in that the specific features, which are generated from the signals and combined in the feature tool, are based on conclusions about the similarity of the signals in question.

In an alternative embodiment, the control modules 10 have the above-mentioned (computing) means in order to evaluate the operating state. These (computing) means then send the results to the assigned grouping module 11 for further processing. These control modules 10 can also use the information of the current signal from the electric drive 9 for the speed regulation of the spindle 8, of the traveller and for the yarn stress regulation.

Fig. 3 schematically shows a ring spinning machine 1 and a winding machine 24, which form a machine complex by means of a connection and a bidirectional interface 27 (schematically shown) in the form of a staple tray transport system 26. Other suitable, automated or manual transport systems are also contemplated within the scope of the present invention. In this way, it is possible, for example, to transport the cop 7 manually by vehicle from the ring spinning machine 1 to the winder 24. The winder 24 rewinds the cop 7 into crosswound bobbins 25, which are transferred to the bobbin station by means of a conveying system 26. The control device 28 correspondingly controls the winding machine 24.

The information which occurs during the production of the cop 7 as a result of the described single-spindle drive 9 of the ring spinning machine 1 and which is transmitted via the bidirectional interface 27 can contain one or more of the following points:

the length of the yarn on the cop;

the number and location of yarn breaks within the length of the yarn;

the number and location of break points (lower yarn stress);

this information is ascertained by the decentralized control modules 10 of the single-spindle drives 9, for example by means of rotational speed measurement, the number of stops, etc., and is transmitted to the central control module 12.

The shape and configuration of the cop;

this information can be ascertained if the orientation of the spindle ring and the height relative to the cop 7 are processed in addition to the above-mentioned information about the length, the number and position of yarn breaks, etc.

Degree of non-uniformity in the degree of hairiness;

the degree of non-uniformity in yarn construction, e.g., bead chains, repeating patterns during cop manufacture, etc.;

in the case of manufacturing a Core-spun yarn (Core-Garn), it is possible to find out the region in which the Core is irregularly wrapped.

In addition to the first three pieces of information mentioned above, the mode of power consumption and the resulting torque consumption are also taken into account in order to obtain these pieces of information from the single-spindle drive 9. These cop are then either marked directly with an identification device, for example an RFID tag, or identified by the peg tray conveyor system 26, so that the winder 24 can assign the information obtained to the corresponding cop 8. Each single spindle drive 9 collects information for each built cop 7 by means of a control module 10. The analysis and calculation of this information (analogously to the information mentioned in connection with fig. 2) takes place either directly in the decentralized control modules or in the grouping modules 11, depending on the available computing capacity. This information is sent to the central control module 12 via the packet module 11. The central control module 12 forwards this information centrally via the bidirectional interface 27 to the winding machine 24 for processing.

The winder 24 can therefore be operated more specifically and more efficiently by the control device 28 when rewinding the yarn 7:

the speed profile of the rewinding of the cop 7 can be adapted according to the information of the single-spindle drive 9:

the individual shape of the cop 7 is conveyed and the rewinding speed can take into account the shape of the cop 7 (e.g. slow in case of small cop diameter and fast in case of large cop diameter). This prevents yarn breakage during spooling and thereby results in greater efficiency during spooling.

The individual yarn stress variation processes of the cop 7 are transmitted and the rewinding speed can take into account the yarn stress on the cop 7 (e.g. low yarn stress occurs at the point of interruption). This prevents multiple layers from being drawn out of the cop 7 at the same time and this results in the pick-out of the cop 7.

During the winding process, it can be ascertained in particular whether the cop 7 has been completely unwound. This makes the logistics more efficient when transporting the cop back to the ring spinning machine 1 on the peg tray transport system 26 of the bobbin winder 24. It is dispensed with to separately check whether the cop 7 has been completely unwound, since only the completely unwound cop 7 is fed back. All the bobbins 7 not completely unwound are fed again to the winder 24 in a separate production line.

Known defective parts are transported and do not have to be detected first. Thereby, the yarn end to the cross-winding bobbin 25 can be retained and yarn finding on the winding bobbin 25 is dispensed with:

a single defective site can be directly trimmed. This results in a higher efficiency in the spooling process.

Adjacent consecutive defective portions (e.g., bead chains) may be trimmed off as a whole. This results in a higher efficiency in the spooling process.

The area of core-spun yarn where the core is irregular or even not wrapped can be cut off as a whole. This results in a higher efficiency in the spooling process.

Since the defective region can be moved closer together in a targeted manner and yarn breakage during the rewinding process can be prevented by better process control, the yarn can be drawn off tangentially from the cop. This enables a "balloon-free" yarn movement when rewinding is performed and thereby prevents a loss of quality of the yarn, in particular in terms of hairiness.

List of reference numerals

1. Ring spinning machine

2. Spinning station

3 ₁ Head of ring spinning machine 1

3 ₂ Tail of ring spinning machine 1

4. Roving bobbin

5. Stretching device

6. Rough yarn

7. Cop

8. Spindle and method of manufacturing the same

9. Single spindle drive for spindle 8

10. Decentralized control module for a single spindle drive 9

11. Packet control module

12. Central control module

13. Machine data bus

14. Packet data bus

15. Digital communication network

16. Control module for command and reporting element 17

17. Instruction and report element, operation unit

18. Machine instruction bus

19. Packet instruction bus

20. Display device

22. Spindle frame base

23. Ring rail

24. Bobbin winder

25. Cross winding bobbin

26. Hanging nail tray conveying system

27. Bidirectional interface

28. Control device of bobbin winder 8

x longitudinal direction.

Claims

1. Method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) having a plurality of spindles (8) which are arranged on spindle carriers (22) and which each comprise an electric drive (9),

wherein each electric drive (9) has a decentralized control module (10) which cooperates with the electric drive (9) and which has means for communicating with a superordinate central control device (12) by means of a data bus,

wherein the cop (7) is transported from the ring spinning machine (1) to the bobbin winder (24) by a transport system (26),

it is characterized in that the preparation method is characterized in that,

-a decentralized control module (10) of the electric drive (9) collects information about the shape or configuration of the cop (7) or about the yarn being built;

-transmitting said information to said winder (24) via an interface (27); and moreover

The winding machine (24) takes the received information into account when unwinding the cops (7) and producing cross-wound bobbins (25).

2. Method for operating a winding machine (24) for rewinding cops (7) of a preceding ring spinning machine (1) according to claim 1, characterized in that the distributed control module (10) of the electric drive (9) delivers via the interface (27) of the winding machine (24):

-the length of the yarn on the cop (7);

the number and location of yarn breaks within the length of the yarn;

the number and position of interruption points during the manufacture of the cop;

the shape and configuration of the cop (7);

the degree of unevenness in the hairiness of the yarn;

the degree of non-uniformity in the yarn construction,

as information for each individual cop (7).

3. Method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) according to claim 1 or 2, characterized in that there is at least one grouping module (11) which is assigned to a plurality of decentralized control modules (10) and which queries from the assigned decentralized control modules (10) of the grouping modules (11) information about the shape or construction of the cop (7) or about the constructed yarn and which is sent from the assigned decentralized control modules to the grouping module (11) and analyzed there.

4. Method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) according to claim 1 or 2, characterized in that there is at least one grouping module (11) which is assigned to a plurality of decentralized control modules (10) and information about the shape or construction of the cop (7) or about the constructed yarn is analyzed by the assigned decentralized control modules (10) and is transmitted from the control modules (10) to the grouping module (11) assigned to the decentralized control modules (10).

5. Method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) according to claim 1 or 2, characterized in that the winding machine (24) adapts the speed profile of the rewinding of the cop (7) according to the information of the electric drive (9).

6. Method for operating a winding machine (24) for rewinding a cop (7) of a previous ring spinning machine (1) according to claim 1 or 2, characterized in that a defective portion is transmitted as information to the winding machine (24) and the defective portion is cut off.

7. Method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) according to claim 1 or 2, characterized in that the winding machine (24) takes into account the yarn stress of the cop (7) when rewinding.

8. Method for operating a winding machine (24) for rewinding a cop (7) of a previous ring spinning machine (1) according to claim 1 or 2, characterized in that said winding machine (24) takes into account the shape of said cop (7) when rewinding.

9. Method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) according to claim 1 or 2, characterized in that the yarn length of the cop (7) is transferred and the winding machine (24) ascertains whether the cop (7) has been completely unwound.

10. Method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) according to claim 1 or 2, characterized in that the cop (7) is transported from the ring spinning machine (1) to the winding machine (24) by an automatic or manual conveying system (26).

11. Method for operating a winding machine (24) for rewinding a cop (7) of a preceding ring spinning machine (1) according to claim 1 or 2, characterized in that all not completely unwound cops are fed again to the winding machine (24).

12. Ring spinning machine (1) for carrying out one of the methods of the preceding claims 1 to 11,

the ring spinning machine has a plurality of spindles (8) which each comprise an electric drive (9),

-the ring spinning machine has an automatic or manual transport system (26) for transporting the cop (7) from the ring spinning machine (1) to a winder (24),

it is characterized in that the preparation method is characterized in that,

-the decentralized control module (10) comprises means for determining information about the shape or configuration of the cop (7) or about the yarn produced; and also

-the decentralized control module comprises an interface (27) for transmitting the collected information centrally to the winder (24).

13. A ring spinning machine (1) according to claim 12, characterized in that the decentralized control module (10) determines:

-the length of the yarn on the cop (7);

the number and location of yarn breaks within the length of the yarn;

the number and location of interruption points during cop manufacture;

the shape and configuration of the cop (7);

degree of unevenness in the hairiness degree of the yarn;

the degree of non-uniformity in the yarn construction,

as information for each individual cop (7).

14. A ring spinning machine (1) according to claim 12 or 13, characterized in that between the decentralized control module (10) and the superordinate central control device (12) there is a grouping module (11) which is assigned to a plurality of decentralized control modules (10).

15. A ring spinning machine (1) according to claim 12 or 13, characterized in that there is an automatic or manual conveying system (26) for transporting the cop (7) from the ring spinning machine (1) to a winder (24).