EP1913186A1

EP1913186A1 - Method for plaiting a fibre web control device and textile machine combination

Info

Publication number: EP1913186A1
Application number: EP06761244A
Authority: EP
Inventors: Thomas Brose; Götz Theodor Gresser; Christian Müller
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2005-08-08
Filing date: 2006-07-27
Publication date: 2008-04-23
Also published as: CN101243219A; WO2007016798A1; DE102005037836A1

Abstract

A method is disclosed for the plaiting of a fibre web (FB), delivered from a spinner preparation machine (2), for example, a carding machine (2), combing machine, or drawing frame, by means of a web lay (3) in a fibre web container (19), the fibre web (FB) running from a delivery device (15), arranged at the output from the spinner preparation machine (2,) to a drawing-in device (17), arranged at the web lay (3) and hence subjected to a draft (V), corresponding to the ratio of the drawing-in speed of the drawing-in device (17) to the delivery speed (LG) of the delivery device (15). The draft (V) is automatically variably controlled during the plaiting of the fibre web (FB) depending on the delivery speed (LG) of the delivery device (15) by means of a previously given standard function (VG). Also disclosed is a control device (26), in particular, for carrying out the above method and a textile machine combination (1) with such a control device (26).

Description

Method for depositing a sliver, control device and text machine combination

The present invention relates to a method for depositing a sliver supplied by a spinning preparation machine by means of a tape storage in a sliver container, wherein the sliver is guided by a arranged at the output of the spinning preparation machine delivery device to a arranged at the entrance of the tape storage collection device and thereby subjected to a delay, which the ratio of the intake speed of the 0 feed device and the delivery speed of the delivery device corresponds.

In a further aspect, the present invention relates to a control device for the delay, the one delivered by a spinning preparation machine to a reel sliver between a arranged at the output of the spinning preparation machine and a delivery device

Feeding device, which is arranged at the entrance of the tape storage experiences, wherein the delay corresponds to the ratio of the intake speed of the intake device and the delivery speed of the delivery device.

J) Furthermore, the present invention relates to a textile machine combination comprising a spinning preparation machine comprising a delivery device arranged at its exit for supplying a sliver, and a sliver depositing device comprising a collection device arranged at its inlet for drawing in the sliver supplied by the spinning preparation machine, the sliver

S sliver between the delivery device and the intake device undergoes a delay, which corresponds to the ratio of the intake speed of the intake device and the delivery speed of the delivery device.

From DE 37 34 425, for example, a tape storage with o3 electric motor drive device is known for a card. The tape storage is designed so that the delivery speed of a arranged at the output of the card delivery device detected and to control the feed rate of a on Input of the tape tray arranged collection device is used. The resulting distortion of the sliver to be deposited is adjustable in advance-tm4 is maintained in each operating condition.

With such a control of the distortion of a sliver to be deposited between the delivery device and the intake device, however, it often leads to disturbances, in particular to undesirable, permanent deformations of the sliver, which are also called false warpage. Practice shows that in a conventional control of the distortion of a sliver to be deposited

0 faults often occur between the delivery device and the collection device. Delay in this area is often either too high or too low. In both cases, the disorder can lead to a band break.

In the case of slightly excessive distortion occur undesirable, permanent deformations 5 of the sliver, which are also called Fehlverzüge. If the

Distortion error is too large, this leads directly to the demolition of the sliver. If the distortion in this area is set too low, there is a risk that the sliver uncontrollably tends to form an ever-increasing, sagging loop. If this condition persists without correction, "0 knotting" may occur in the loop. The knot will then hang on arrival in the tape storage, which also leads to a demolition. In some cases, it also leads to the demolition of the sliver. Although these problems can in principle be counteracted by a reduction in the set delay, there is the risk that the sliver tends uncontrollably to form an ever-increasing, sagging loop. Such a loop always forms when more sliver is delivered than drawn in over a certain period of time.

Deforming leads to an uneven thickness of the sliver to be deposited, which can not be completely compensated by subsequent stages in the spinning process or only under a high cost. Therefore, misalignments between a card and a tape storage device associated therewith will degrade the card Economics of the spinning process and ultimately the quality of the. End product of spinning, namely the quality of the yarn produced.

A demolition of the sliver to be deposited leads as well as the formation of a sagging loop to an interruption of production. This also leads to considerable cost disadvantages.

In order to avoid the problems mentioned, it is provided according to DE 37 34425 that between the delivery device and the intake device

0 unpowered tape guide rollers are arranged, wherein at least one of the tape guide rollers to form a sliver loop in dependence on the belt tension on a dancer device is arranged displaceably. Here, the respective displacement position of the dancer device is detected by an electrical measuring device and as a control variable for fine tuning of the delay

15 used.

The disadvantage of this solution are first the high design and the large measuring and control engineering effort. Furthermore, it is disadvantageous that the dancer device because of their inertia rapid changes of

> 0 belt tension can follow only with a time delay, just as oscillations of the dancer device can be excited just in case of periodic changes in the band tension. As a result, by means of the disclosed device, a knot can not be prevented with certainty.

> 5

The object of the present invention is thus to provide a method for depositing a sliver supplied by a spinning preparation machine, a control device and a textile machine combination which avoids the disadvantages mentioned and in particular the generation of a uniform sliver

50 simultaneously increased productivity. The object is achieved by a method for depositing a sliver supplied by a spinning preparation machine, a control device and a textile machine combination with the features of the independent claims.

5

In the method according to the invention, it is provided that the distortion during the laying down of the fiber sliver is automatically and variably controlled as a function of the delivery speed of the delivery device on the basis of a predefined predefined function.

0

Furthermore, the inventive control device for automatically and variably controlling the delay in dependence on the delivery speed of the delivery device based on a predefined default function is formed.

The invention is based on the empirically found finding that the optimal distortion of a fiber sliver between a delivery device of a spinning preparation machine and a drawing-in device of a sliver storage device depends essentially on the respectively present delivery speed of the delivery device. The theoretical background of this phenomenon is not yet

ΪO clarified.

The default function describes a relationship between the delivery speed considered as an independent variable and the delay considered as a dependent variable, whereby the delivery speed and thus also the delay in the time course are variable. The default function may be, for example, a polynomial. It is also possible to define the default function in sections. To find a suitable default function suitable test series can be carried out in a pre-operational phase. An automatic control of the delay takes into account the fact that the delivery speed itself during

> 0 of storing the sliver is controlled automatically. For the control of the delay, the current setpoint value of the delivery speed, which is predetermined for example by a machine control of the spinning preparation machine, or the current actual value of the delivery speed, which is detected by a more appropriate sensor 5, are used.

By the present invention can be dispensed with a complex unit to form a monitored sliver loop easily. Nodding and false warping can be effectively prevented.

0

The significance of the invention results in particular from the delivery speeds of the various products, which have increased steadily over many years

Spinnereϊvorbereitungsmaschinen. Thus, the delivery speed of today's standard card during normal production is 400 m per minute and more.

5 However, it is often necessary to reduce the delivery speed significantly. So usually a so-called creeper is provided, which can be set manually or automatically, for example, when a disturbance occurs in the supply of raw material. The speed of delivery in crawl speed is only 15 m per minute, for example. So it's very important

> 0 over a wide speed range, always working with an optimally set delay.

Advantageously, the control device according to the invention is designed such that it can be used to control the delay by simultaneously controlling the

.5 retraction speed of the intake device and the delivery speed of

Delivery device is formed. As a result, a particularly secure control of the delay can be effected. In this case, however, it must be ensured that the delivery speed of the delivery device is adapted to further upstream working areas of the card.

10

It is therefore preferably provided that the control device for evaluating a signal corresponding to the delivery speed of the delivery device and for Controlling the delay on the basis of the evaluation by sole control of the intake speed of the intake device is formed. In this case, a simple structure of the overall arrangement results.

5 As a corresponding signal can advantageously be a measurement signal of the

Delivery speeds detecting sensor can be used. This ensures that the actual value of the delivery speed is used to control the intake speed, whereby the desired delay can be set with great accuracy.

0

Alternatively or additionally, a control signal can be used as the corresponding signal, which is predetermined for example by a component of the machine control of the spinning preparation machine and represents the current setpoint value of the delivery speed. This always makes sense

5 if it is ensured that the setpoint and the actual value are essentially the same.

If a sensor for detecting the delivery speed is provided, the delivery speed can be regulated by means of a closed loop, which improves the control of the delay.

Also, the controller may be associated with a sensor for detecting the feed rate, so that the actual delay can be checked. Furthermore, it is possible that the feed rate is controlled by! 5 a closed loop, which further improves the control of the delay. Advantageously, the control device is part of the control loop.

Advantageously, it is provided that the default function is defined so that it is monotonically increasing at least over a substantial portion, so that the delay is increased at least in this section with increasing delivery speed. This is particularly useful because tests have shown that at high Delivery speeds a lower risk of incorrect or strip breakages is present.

It is equally advantageous if the default function is defined such that it is continuous or quasi-continuous over at least a substantial portion, so that the delay is controlled steplessly or quasi-continuously, at least in this section. A continuous control in pure form can be realized by means of an analog control device. If the controller is implemented in digital technology, stages are inevitable. However, these can be kept so small that they are practically negligible. In this case, the control is quasi-stepless.

Furthermore, the default function can be defined such that at least one sliver parameter, for example the band weight, the sliver cross section, the staple length, the degree of parallelization of the fibers, the proportion of fibers with trailing or Kopfhäkchen, the short fiber content, the moisture content and / or the fiber material as such , is taken into account when controlling the delay. This is based on the recognition that slivers with different properties react differently to one and the same distortion. For example, the risk of strip breaks and faulty distortion increases with a high degree of parallelization of the fibers of the sliver. In this case, a lower delay is required.

Similarly, environmental parameters affect the optimal distortion. Therefore, it is useful if the default function is defined so that at least one environmental parameter, such as the temperature and / or humidity, is taken into account when controlling the delay.

The same applies to machine parameters. Advantageously, the default function is therefore defined so that in addition to the delivery speed at least one further machine parameters of the spinning preparation machine, for example, the delay setting internal delay stages of the spinning preparation machine, is taken into account when controlling the delay. Advantageously, at least one of the values of said sliver parameters, environmental parameters and / or further machine parameters for controlling the delay is detected automatically, preferably continuously. This makes sense especially with rapidly changing parameters.

However, it is also possible for at least one of the values of said sliver parameters, said environmental parameters and / or said other machine parameters to control the distortion to be detected manually. For example, it may be provided that an operator measures the ambient temperature and, for example, transmits it to the control device by means of an operating unit of the spinning preparation machine.

The control device according to the invention is advantageously at least partially integrated in the software and / or hardware of the machine control of the spinning preparation machine. As a result, the control device can be realized inexpensively. In particular, existing resources such as input units, output units, processors, data lines, etc. may be used.

Preferably, the control device is preferably non-volatile

Memory means assigned to the storage of the default function. In this case, the default function remains after switching off the control device or after a power failure and need not be reentered. This applies both to the default function as such and to parameters entered or selected by the operator.

Furthermore, it is advantageous if a plurality of functions can be stored in the preferably non-volatile storage means, from which the default function can be selected. For example, it is possible to test newly defined functions in practice. It is also possible to deposit functions that are frequently recurring

Include parameter combinations. The relevant parameters do not have to be entered manually. An inventive textile machine combination has an inventive control device for the delay. This results in the advantages described above.

Advantageously, it is provided that the delivery device is assigned a delivery drive motor and the intake device is a separate intake drive motor, wherein a motor control is provided for controlling the delivery drive motor and a separate motor control for controlling the intake drive motor. On a firm mechanical connection of the spinning preparation machine and the tape storage

^■ p can then be dispensed with. What is needed are at most (electrical) lines for the transmission of information and energy.

It is preferably provided that the delivery drive motor is an electric motor, which is controllable via a supply frequency and that its motor control comprises a -5 frequency converter. Furthermore, it is preferred that the retraction drive motor is an electric motor which is controllable via a supply frequency and that its motor control comprises a frequency converter. Such drives are inexpensive, reliable and require relatively little space.

£) Further advantages of the invention are described in the following exemplary embodiments. It shows:

Figure 1 is a schematic view of an inventive

A textile machine combination comprising: a spinning preparation machine and a belt tray;

Figure 2 is a schematic view of another embodiment of an inventive textile machine combination;

3 is a diagram of a default function, and FIG 4 shows a diagram of a default function with different parameter values.

FIG. 1 shows a textile machine combination 1, which supplies a fiber band

5 spinning preparation machine 2 and a tape storage 3 includes. By way of example, a carding machine 2 is shown for a fiber-banding spinning preparation machine 2. However, the invention can also be applied to a textile machine combination 1 which comprises another fiber-abrasive spinning preparation machine 2, for example a carding machine, a line or a combing machine.

0

The carding machine 2 is designed for carding, in particular, short staple synthetic or natural fibers and fiber blends formed therefrom. The carding machine 2 comprises a filling shaft 4, which is shown here only schematically. The hopper 4 can in a known manner in its upper part of a feed shaft and in his

5 lower part of a reserve shaft and between a Öffnereinheit, for example with a terminal feed, a Öffnerwalze and a cleaning device include. The filling shaft 4 can be supplied via a pipe system, not shown, by means of an air flow fiber material FM, which is prepared in a blowroom and is in the form of coarse flakes.

: 0

By opening the coarse fiber flakes, the formerly strong cohesion of the individual fibers is reduced, thus producing the most uniform possible cotton wool. The cotton wool is fed to a fiber feeding system 5. The fiber feeding system 5 comprises a feed roller 6, which has the task of the cotton slowly into the work area of a

; 5 licker 7 to push. The licker-7 - it can also be provided multiple licker - dissolves the cotton again to flakes and passes them to a spool 8. The flakes are passed through the spool 8 to not shown, stationary carding and / or on a revolving flat 9, wherein in the actual carding process the fiber flakes to single fibers

: 0 to be resolved. After carding between the spool 8 and the fixed carding and / or the revolving flat 9, the spool 8 carries the fibers loosely and parallel to a sliver removal system 10 on. On a customer 11 of the sliver removal system 10, a nonwoven fabric FV is formed, which is removed by a take-off roller 12 from the purchaser 11 and then by means of a

Outlet roller pair 13 is transported to a compression means 14. The only schematically indicated compression means 14 has the task to combine the nonwoven fabric FV to a sliver FB. For this purpose, it comprises movable and / or fixedly arranged guide means, for example a transverse band arrangement 14 with a funnel connected downstream of the one or more transverse bands.

The delay between the take-off roll 12 and the discharge roll pair 13 is usually predetermined by a mechanical coupling between the take-off roll 12 and the discharge roll pair 13, which includes, for example, gears and / or belt assemblies and is constant during operation. However, the mechanical coupling may include a change point, for example, with interchangeable discs or change wheels, so that the translation of the mechanical coupling and thus the said delay are adjustable. However, it can also be provided that the take-off roller 12 and the outlet roller pair 13 are driven independently of each other. Then, the delay between said rollers 12, 13 can be controlled in dependence on the speed of the nonwoven fabric FV.

Also, the delay to which the nonwoven fabric FV is subjected between the discharge rollers 13 and the transverse belt assembly 14 is adjustable via a change point, for example with the change, but constant during operation. However, the delay between the discharge rollers 13 and the transverse belt assembly 14 could also be controlled variably, for example as a function of the speed of the fiber fleece FV, with a corresponding design of the drive of the delivery rollers 13 and the transverse belt arrangement 14.

From the transverse belt arrangement 14, the sliver FB is guided to a delivery device 15 arranged at the exit of the carding machine 2. The delivery device 15 is For example, formed as a disk roller pair 15. About one or more tape guide rollers 16, the sliver FB passes in the direction of LR to a arranged at the entrance of the tape tray 3 feed device 17, which is formed for example as calender roll 17. The retraction device 17 can

5 but also be an aggregate or an assembly which is provided on the tape tray 3. It is conceivable, for example, that the intake device 17 is designed as a drafting system. A tape storage with a drafting device designed as a drafting device is known for example from DE 19721758. The direction of rotation LR of the sliver FB is shown by an arrow.

0

About a turntable 18, the sliver FB is stored in a sliver container 19. The sliver container 19 may be formed for example as a round can or as a rectangular can. In order to allow a deposition of the sliver FB in orderly loops or turns, the sliver container 19 is on a

5 movable can plate 20 stored. When using a round can, the can plate 20 is usually rotatory, in the case of a rectangular can, translationally moved.

The sliver FB is subjected to a delay V between the delivery device 15 and the intake device 11, which corresponds to the ratio of the intake speed of the intake device 17 and the delivery speed of the delivery device 15. The curly bracket indicates the area in which the sliver FB is subjected to the draft V. This area extends from the delivery device 15 via the tape guide roller 16 to the intake device 17. 5 If the intake device 17 is a drafting device, this range extends from the delivery device 15 to the pair of intake rollers of the drafting system.

The delivery speed is determined by a drive associated with the delivery device 15, which comprises, for example, a delivery drive motor M1 and a transmission 22,> 0 and by an engine control unit FU 1 assigned to the drive. Of the

Supply drive motor M1 may be an electric motor which is controllable via a supply frequency. In this case, the supply drive motor M1 is usually called Three-phase asynchronous motor M1 and the motor controller FU1 formed as a frequency converter FU1. However, other types of engines may be used with corresponding engine controls. The frequency converter FU 1 is integrated in a machine control 21 of the card 2 or at least communicates with it.

In the illustrated embodiment, the motor M1 drives both the delivery device 15 and the transverse band assembly 14. However, it could also be provided that the motor M1 exclusively drives the delivery device 15 or additionally further elements of the carding machine 2, for example the exit roller pair 13. The ratio of the operating speed of the cross-belt arrangement 14 and the delivery speed of the delivery device 15 is constant during operation of the carding machine 2, but can usually be adjusted via changing points in the transmission 22, for example by exchangeable pulleys or gears. Nevertheless, it could be provided that the transverse belt arrangement 14 and the delivery device 15 are driven in such a way that a variable delay between the transverse belt arrangement and the delivery device is possible. The delay could then be controlled in dependence on the speed of the sliver FB. In order to enable a trouble-free operation of the card 2, the control of the delivery drive motor M1 by the motor controller FU 1 is based on a signal S3, which comes from a motor controller FU3, which drives at least the outlet roller pair 13.

The motor FU3 downstream motor and the drive of the outlet roller pair 13 is not shown for reasons of clarity. However, the required synchronicity of the successively arranged nonwoven or tape guiding means 13, 14, 15 is ensured.

By contrast, the intake speed of the intake device 17 is determined by the engine control unit FU2, the intake drive motor M2 and by the transmission 24. The feed drive motor M2 can likewise be a three-phase asynchronous motor M2 and the motor controller FU2 a frequency converter FU2. The engine control unit FU2 is part of a Machine control 23 of the tape storage 3 or at least assigned. In the illustrated example, the turntable drive motor M2 and the turntable 18 and the can plate 20 is driven. For this purpose, however, separate motors could be provided. In the present embodiment, however, a constant speed ratio with respect to the intake device 17, the turntable 18 and the can plate 20 is given by the transmission 24. This ratio can only be changed by costly replacement of interchangeable elements.

In order to control the distortion V between the delivery device 15 and the intake device 17, a control device 26 according to the invention is provided. The control device 26 is associated with a sensor 25 which detects the delivery speed of the delivery device 15 and transmits it as a signal S2. Based on a predefined default function VG and the signal S2 corresponding to the delivery speed, the control device 26 determines a default value for the desired delay. Alternatively to the signal S2, the control signal S3 for determining the default value could also be transmitted to the control device 26, since the signal S3 also corresponds to the delivery speed.

Since the delivery speed of the delivery device 15 is known, a default value for the intake speed can be calculated and transmitted as a signal S4 to the motor controller FU2 of the intake drive motor M2. By the motor control FU2 now the desired intake speed and thus the resulting from the default function VG default V is set.

Also shown is an operating unit 28 of the spinning preparation machine 2, which can also be used to operate the control device 26. Also shown is a machine control 21 associated memory means 29, which is connected via not shown connections to the control device 26, so that the default function VG can be stored in the memory means 29 and read out by the control device 26. FIG. 2 shows a further embodiment of the present invention. The control device 26 is designed here both for controlling the delivery speed and for controlling the intake speed. For this purpose, the control device 26 is supplied with a signal S3, which represents the speed upstream working areas of the card 2. On the basis of this signal S3, the control device 26 calculates a signal S6, which is transmitted to the engine controller FU1 of the delivery drive motor M1. With this signal S6, the speed of the delivery drive motor M1 and thus the delivery speed of the delivery device 15 is specified.

The actual delivery speed is detected continuously by means of the sensor 25 and the control device 26 is returned as the signal S2. If the actual delivery speed deviates from the predetermined delivery speed, the control device 26 changes the signal S6 until the deviation has disappeared. The delivery speed is thus by means of a closed loop, the control device 26, the motor controller FU1, the supply drive motor M1, the transmission 22, the delivery device 15 and the sensor 25 includes.

At the same time, the desired delay V is determined by means of the default function VG. For this purpose, the delivery speed calculated by the control device 26 or preferably the actual delivery speed, ie the measured delivery speed, can be used. In order to set the desired delay V, the feed speed of the intake device 17 must now be set. For this purpose, the control device 26 delivers a signal S4 to the motor controller FU2, which is the

Retraction drive motor M2 specifies a corresponding speed, so that via the gear 24, the feed speed of the retraction device 17 is predetermined.

The intake speed is measured continuously by means of the sensor 27 and returned to the control device 26 as signal S5. This is also a closed loop here. By controlling the delivery speed and the intake speed, it can be ensured that the distortion V determined by means of the default function VG is maintained with high accuracy. For example, such a deviation of the delay V, which is caused by a load-dependent slip of the motors M1, M2, 5 are compensated.

FIG. 3 shows a diagram of a default function VG. The delivery speed LG is shown on the horizontal axis and the resulting draft V on the vertical axis. Since the delivery speed LG is dependent on the time t, is also the

0 delay V time-dependent. The default function VG can be described mathematically in a general way as VG (t) = f (LG (t)). It is steadily and monotonically increasing over its entire domain of definition. The definition range includes the crawl speed KG as well as the normal working speed AG and thus extends to the left as well as the right side beyond. Of the

5 Crawl path delay According to the default function VG, VKG is significantly lower than the normal work delay VAG.

Also shown is a curve DG, which represents the delay V, when it falls below at the respective delivery speed LG, the formation of a

»0 continuously increasing slack loop is likely. Also shown is a curve FVG, which represents the lower limit at which false warpage is to be expected. Finally, the curve BG indicates the breaking point, which leads to an outline of the sliver FB. The curve DG and the curve FVG can be determined empirically. The default function VG can then be defined to be between

.5 the above curves, FVG and DG.

FIG. 4 shows a default function VG in which sliver parameters FP, environmental parameters UP and / or further machine parameters MP are taken into account. It therefore has the general mathematical form VG (t) = f (LG (t), FP (t), UP (t), 50 MP (t)). The default function VG is shown both for a first value combination W1 and for a second value combination W2. The value combinations W1, W2 in each case include the values of the considered fiber band parameters FP, environmental parameters UP and / or the further machine parameters MP. The value combination W1 includes, for example, sliver parameters FP of a sliver FV with a relatively high short fiber content. Due to the resulting lower cohesion of the fibers, a lesser distortion V is predetermined here than is the case for the combination of values W2, which includes fiber sliver parameters FP of a sliver FV with a lower short fiber content.

The present invention is not limited to the illustrated and described embodiment. There are modifications within the scope of the claims at any time. Thus, it can also be provided that the control device 26 is integrated in the band storage 3, for example in the machine control 23. It is also possible that the control device 26 is designed as a separate device.

Claims

claims

1. A method for depositing one of a spinning preparation machine (2), such as a carding machine (2), comber or track supplied

5 fiber sliver (FB) by means of a tape tray (3) in a sliver container (19), wherein the sliver (FB) from a at the output of the spinning preparation machine (2) arranged delivery device (15) to a at the entrance of the tape storage (3) arranged collection device ( 17) and thereby a delay (V) is subjected, which the ratio

IO of the intake speed of the intake device (17) and the

Delivery speed (LG) of the delivery device (15) corresponds, characterized in that the delay (V) during the deposition of the sliver (FB) depending on the delivery speed (LG) of the delivery device (15) based on a predefined default function (VG) automatically and

15 is variably controlled.

2. The method according to claim 1, characterized in that with the delivery speed (LG) of the delivery device (15) corresponding signal (S2, S3) evaluated and the delay (V) based on the evaluation by taxes

.0 the intake speed of the intake device (17) is controlled.

3. The method according to claim 2, characterized in that as a corresponding signal (S2, S3), a measurement signal (S2) of the delivery speed (LG) detecting sensor (25) is used.

.5

4. The method according to claim 2, characterized in that as a corresponding signal (S2, S3) a control signal (S3) for controlling the delivery speed (LG), for example, from a component (FU3) of a machine control (21) of the spinning preparation machine (2) originates,

) 0 is used.

5. The method according to any one of the preceding claims, characterized in that the delivery speed (LG) and / or the intake speed by means of at least one closed loop (26, FU1, M1, 22, 15, 25 and 26, FU2, M2, 24, 17, 27) is regulated.

6. The method according to any one of the preceding claims, characterized in that the default function (VG) is defined so that it is monotonically increasing at least over a substantial portion, so that the delay (V) at least in this section with increasing delivery speed (LG) is increased.

7. The method according to any one of the preceding claims, characterized in that the default function (VG) is defined so that it is continuous or quasi-continuous at least over a substantial portion, so that the delay (V) at least in this section continuously or is controlled virtually infinitely.

8. The method according to any one of the preceding claims, characterized in that the default function (VG) is defined so that at least one sliver parameter (FP), for example, the band weight, the sliver cross section, the staple length, the degree of parallelization of the fibers, the proportion of fibers Tow or Kopfhäkchen, the short fiber fraction, the

Moisture content and / or the fiber material is considered as such in controlling the delay (V).

9. The method according to any one of the preceding claims, characterized in that the default function (VG) is defined so that at least one

Environmental parameters (UP), such as the temperature and / or humidity, when controlling the delay (V) is taken into account.

10. The method according to any one of the preceding claims, characterized in that the default function (VG) is defined so that in addition to the delivery speed

(LG) at least one further machine parameter (MP) of the spinning preparation machine (2), for example, the default setting internal delay stages of the spinning preparation machine (2), when controlling the delay (V) is taken into account.

11. The method according to any one of claims 8 to 10, characterized in that

5 at least one of said sliver parameters (FP), environmental parameters

(UP) and / or further machine parameters (MP) for controlling the delay (V) automatically, preferably continuously, is detected.

A method according to any one of claims 8 to 11, characterized in that 0 is at least one of said sliver parameters (FP), said

Environmental parameter (UP) and / or the said other machine parameters (MP) for controlling the delay (V) is detected manually.

13. Control device (26) for the delay (V), the one of a

5 spinning preparation machine (2), for example a card (2),

Combing machine or track, to a band tray (3) supplied sliver (FB) between one at the output of

Spinnereivorbereitungsmaschine (2) arranged delivery device (15) and a retraction device (17) which at the entrance of the tape tray (3)

! 0, learns, wherein the delay (V) the ratio of

Feeding speed of the intake device (17) and the delivery speed (LG) of the delivery device (15) corresponds, in particular for carrying out the method according to one of the preceding claims, characterized in that the control device (26) for automatic and

! 5 variable control of the delay (V) as a function of the delivery speed

(LG) of the delivery device (15) on the basis of a predefined default function (VG) is formed.

14. Control device (26) according to claim 13, characterized in that it • 0 for controlling the delay (V) by simultaneously controlling the

Feed speed of the intake device (17) and the delivery speed (LG) of the delivery device (15) is formed.

15. Control device (26) according to claim 13, characterized in that it is used for evaluating a signal (S2, S3) corresponding to the delivery speed (LG) of the delivery device (15) and for controlling the delay on the basis of the evaluation by controlling the intake speed alone Feeding device (17) is formed.

16. Control device (26) according to any one of claims 13 to 15, characterized in that it is associated with a sensor (25) for detecting the delivery speed (LG).

17. Control device (26) according to any one of claims 13 to 16, characterized in that it is associated with a sensor (27) for detecting the feed speed.

18. Control device (26) according to one of claims 16 or 17, characterized in that it is used to control the delivery speed (LG) and / or the intake speed by means of at least one closed loop (26, FU1, M1, 22, 15, 25 or 25). 26, FU2, M2, 24, 17, 27) is formed.

19. Control device (26) according to one of claims 13 to 18, characterized in that the default function (VG) is defined so that it is monotonically increasing at least over a substantial portion, so that the delay (V) at least in this section at increasing delivery speed (LG) is increasing.

20. Control device (26) according to one of claims 13 to 19, characterized in that the default function (VG) is defined so that it is continuous or quasi-continuous over at least a substantial portion, so that the delay (V) at least in This section is infinitely or quasi-stepless controllable.

21. Control device (26) according to one of claims 13 to 20, characterized in that it is designed to take into account at least one sliver parameter (FP), for example the weight of the strip, the sliver cross section, the staple length, the degree of parallelization of the fibers,

5 of the proportion of fibers with drag or Kopfhäkchen, the short fiber content, the moisture content and / or the fiber material as such, when controlling the delay (V) is formed.

22. Control device (26) according to any one of claims 13 to 21, characterized I O characterized in that they are at least one to take into account

Environmental parameters (UP), for example, the temperature and / or humidity, when controlling the delay (V) is formed.

23. Control device (26) according to any one of claims 13 to 22, characterized

15 that they consider the delivery speed

(LG) for taking into account at least one further machine parameter (MP) of the spinning preparation machine (2), for example, the delay setting internal delay stages of the spinning preparation machine (2), formed in controlling the delay (V)

10 is.

24. Control device (26) according to any one of the preceding claims 21 to 23, characterized in that they for the automatic, preferably also for the continuous detection of at least one value of said

25 sliver parameters (FP), environmental parameters (UP) and / or others

Machine parameter (MP) for controlling the delay (V) is formed.

25. Control device (26) according to one of the preceding claims 21 to 24, characterized in that at least one of the values of said

30 sliver parameter (FP), said environmental parameter (UP) and / or said further machine parameter (MP) for controlling the distortion (V) by an operator, for example by means of an operating unit (28) of the spinning preparation machine (2), can be predetermined.

26. Control device (26) according to one of claims 13 to 25, characterized in that it is incorporated in the software and / or hardware of

Machine control (21) of the spinning preparation machine is at least partially integrated.

27. Control device (26) according to any one of claims 13 to 26, characterized

10 characterized in that it is associated with a preferably non-volatile memory means (29) for storing the default function (VG).

28. Control device (26) according to one of the preceding claims 13 to 27, characterized in that in the preferably non-volatile storage means (29)

15 several functions can be stored, from which the default function (VG) can be selected.

29. textile machine combination (1) with a spinning preparation machine (2), such as a carding machine (2), comber or track, comprising a

-0 arranged at its exit delivery means (15) for delivering a

A sliver (3), comprising a collection device (17) arranged at its inlet for drawing in the sliver (FB) supplied by the spinning preparation machine (2), in particular for carrying out the method according to one of claims 1 to 12, wherein the

.5 sliver (FB) between the delivery device (15) and the retraction device

(17) experiences a delay (V), which corresponds to the ratio of the intake speed of the intake device (17) and the delivery speed (LG) of the delivery device (15), characterized in that a control device (26) for the delay (V) after a of claims 13 to 28

$ 0 is provided.

30. textile machine combination (1) according to the preceding claim, characterized in that the delivery device (15) is associated with a feed drive motor (M1) and the retraction device (17) a separate retraction drive motor (M2), wherein a motor control (FU 1) for controlling the delivery drive motor (M1) and a separate motor control (FU) for controlling the

Feed drive motor (M2) is provided.

31. textile machine combination (1) according to claim 30, characterized in that the delivery drive motor (M 1) is an electric motor (M 1) which is controllable via a supply frequency, and that its motor control (FU 1) a

Frequency converter (FU 1) includes.

32. textile machine combination (1) according to one of claims 29 to 31, characterized in that the retraction drive motor (M2) is an electric motor (M2), which is controllable via a supply frequency, and that its motor control

(FU2) comprises a frequency converter (FU2).