EP2017376A1 - Method for operating a spinning frame - Google Patents

Abstract

The method involves storing a set of unspinning programs (26) in a machine control (21). The appropriate unspinning program is selected from the unspinning programs in dependence of a spinning yarn number, spinning yarn type, yarn rotation and machine configuration by the control or a user. The unspinning program executes a selective change of yarn characteristics during unspinning processes against a yarn produced according to a spinning program (23) to achieve a yarn strength optimally adapted to a spinning process, a spool changing process and an unspinning process.

Description

The present invention relates to methods for controlling a spinning machine, in particular ring spinning machine, with a drafting system, a spindle for receiving a yarn package and a ring frame and / or a spindle bank, wherein the drafting system, the spindle, the ring frame and / or the spindle bank through associated drives through a machine control is kept in operation in a coordinated manner and with a holding device for the yarn.

A spinning machine of this type is from the European patent publication EP 0 462 467 A1 known. The retaining device is a clamping device attached to the spindle below the coping, which makes it possible to work with a comparatively short yarn length for the underwinding.

In a ring spinning machine with a retaining device for the yarn, be it an underwinding or clamping device, the individual operating parameters of the spinning machine must be precisely matched to one another. It may be necessary to specifically influence the yarn properties during spinning to ensure trouble-free operation. On the one hand yarn breaks should be avoided during spinning, Kopswechselvorganges and during piecing. On the other hand, the yarn for the Kopswechselvorgang should be able to be torn or cut, optionally with the use of appropriate aids such as cutters, tear-off edges on the retaining device, etc. This is especially true for solid yarns. Here, the tensile strength must be changed by changing the yarn twist and yarn fineness targeted.

From the German publication DE 100 37 513 A1 It is known to control the speeds of the spindles or the drafting system during the spinning process individually, so that the fineness of the yarn and the yarn rotation is changed and adapted to the requirements of the underwinding or clamping.

In the German publication DE 10 2006 003941 A1 the influence on the spinning program is described, whereby the spinning program is changed such that, taking into account the current production conditions, the rotation and / or the warp of the fiber strand or thread is deviated from the standard spinning program in order to achieve high reliability, in particular uninterrupted production; changed is set.

However, the spinning process, which is very important in itself, is still left to the spinning personnel today, who have to make the appropriate adjustments themselves for an optimal spinning process. For this, the operator needs extensive knowledge as well as a lot of experience, since different settings for the spinning process have to be made for different spinning programs. So it makes z. As a big difference, whether pure cotton or a mixture of cotton and man-made fibers is processed. In addition, it also plays a role, whether the spin program provides a fine yarn, a coarse yarn, a normal yarn or even a fancy yarn. Furthermore, the operator must also have knowledge of the current machine settings, in particular if he drives with a spinning program, which is in the border region of what the spinning machine is configured. This is to prevent the spin parameters for the spin-off process from being changed so that they are in an unacceptable range for which the machine was not originally configured.

The object of the present invention is therefore to propose a method which overcomes the above-mentioned deficiencies and is suitable for high operational safety and productivity, i. As few thread breaks as possible, even during the Abspinnvorganges distinguished.

• der gesponnenen Garnnummer (Ne) und/oder
• des gesponnenen Garntyps und/oder
• der Garndrehung (α) und/oder
• der versponnenen Rohstoffe und/oder
• der Maschinenkonfiguration
  ein zutreffendes Abspinnprogramm auswählt wird, wobei das Abspinnprogramm eine gezielte Änderung der Garneigenschaften während des Abspinnprozesses gegenüber dem gemäss Spinnprogramm erzeugten Garn ausführt, um eine für den Abspinnprozess, den Spulenwechselvorgang und/oder den nachfolgenden Anspinnprozess optimal angepasste Garnfestigkeit zu erreichen.

The object is achieved in that a plurality of Abspinnprogrammen are stored in the machine control and by the machine control or by an operator via an input unit from the plurality of Abspinnprogrammen depending on:

• the spun yarn number (Ne) and / or
• of the spun yarn type and / or
• the yarn twist (α) and / or
• the spun raw materials and / or
• the machine configuration
  a suitable Abspinnprogramm is selected, the Abspinnprogramm performs a targeted change in the yarn properties during the Abspinnprozesses against the yarn produced according to the spinning program to achieve an optimally adapted for the Abspinnprozess, the bobbin changing process and / or the subsequent piecing yarn strength.

The abrading process is initiated either by the creation of the top or the rear turn at the end of the winding of a yarn package, in particular a cop, especially at the time when the ring rail is shut down from its uppermost winding point on the yarn package to the bottom thread below the yarn package.

Optimum yarn strength is particularly important for the backwinding and underwinding process during the spinning process, as well as for the yarn-tearing or yarn-cutting process and for doffing during the bobbin change, as well as for the subsequent piecing process.

• der gesponnenen Garnnummer (Ne) und/oder
• des gesponnenen Garntyps und/oder
• der Garndrehung (α)und/oder
• der versponnenen Rohstoffe und/oder
• der Maschinenkonfiguration
  über eine Selektionsroutine das zutreffende Abspinnprogramm automatisch aus und leitet zum gegebenen Zeitpunkt das besagte Abspinnprogramm automatisch ein.

According to a preferred embodiment, the machine control selects from a plurality of spin-off programs stored in the machine control as a function of:

• the spun yarn number (Ne) and / or
• of the spun yarn type and / or
• the yarn twist (α) and / or
• the spun raw materials and / or
• the machine configuration
  via a selection routine, the appropriate Abspinnprogramm automatically and initiates the said Abspinnprogramm automatically at the given time.

The spinning programs are expediently already stored in the machine control. However, the spinning program or programs can also be read into the machine control immediately before the spinning processes. The user determines the desired spin program via an input unit. The machine control then selects from a plurality of Abspinnprogramms stored in the machine control function of the selected spinning program and the machine configuration and possibly other criteria via a selection or selection routine, which is also preferably stored in the machine control, the appropriate Abspinnprogramm and leads to this automatically given out.

Incidentally, an operator can also make this selection manually. The machine control may also suggest to the operator the optimal take-off program. He can confirm or reject the proposal. The machine control then initiates the selected Abspinnprogramm automatically at the given time. Furthermore, the machine control may also be configured so that an operator must initiate the spinning process manually or call the spinning program manually, e.g. by acknowledging a request by the spinning machine.

It is also possible for an operator to manually enter the parameters of the spinning program in advance via an input unit and to store them in the machine control. The spinning program can also be read via an input device in advance electronically from a (mobile) disk and stored in the machine control.

The spin program may include a variety of parameters. So z. B. the yarn count (Ne), that is, the fineness of the yarn, the yarn type, z. As smooth yarn, fancy yarn, such as flame yarn, knobbed yarn, etc., the yarn twist (α), the raw materials used, such as. B. cotton, chemical fibers, inorganic fibers, mixed fibers, etc. Furthermore, the sleeve lengths and diameters used as well as the desired Kopsgrösse or its diameter can be defined as a spinning parameters.

The machine configuration includes z. As ring diameter, rotor weight, drafting geometry or the drafting ratio, which sets the upper and lower limits of the rolling speeds. By considering the machine configuration when selecting the Abspinnprogrammes z. B. ensures that the drafting rollers are operated exclusively in the speed ranges specified by the inserted gear ratio, and the speeds of the drafting rollers are not shifted by the change in delivery or the total delay during spinning in an unacceptable speed range.

Based on the selected spinning program, the driving programs for the drafting or the drafting drive (s), the or the spindle drive (s) and the ring frame drive are calculated by the machine control using a computer unit and optionally in a memory, eg. B. in the machine control or in the drives or the converters stored.

The same applies to the Abspinnprogramm which sets the basis for calculating the driving programs of the drafting device drive or the drafting unit drives, the spindle drive or the spindle drives and the ring frame drive for the Abspinnvorgang at the end of the Garnkörpersbewicklung by the machine control. Amongst other things, these travel programs determine the yarn count produced, yarn type and yarn twist during the spin-off phase.

Depending on the yarn to be produced arise for the calculations of the driving programs in Abspinnprozess different data. The Abspinnprogramm calculates the data of the driving program so that due to compliance with the textile limits as little thread breakage in the last phase of Garnkörperbildung or during spinning, during doffing or bobbin change and the renewed piecing a new yarn package arise. Furthermore, the Abspinnprogramm also ensures that the yarn properties are changed so that the yarn optimally clamps or underwinds and can be cut or cut when changing bobbins.

On a ring spinning machine can z. B. a yarn number in the range of Ne 10 - 100 are driven. This yarn number range can now be divided into subranges of Ne 10-30, Ne 30-70 and Ne 70-100. For each of these yarn number ranges is now one or more spin-off programs are deposited, which are tuned to these yarn count areas. If, in addition, spinning parameters such as raw material, yarn twist, yarn type and machine modification are taken into account, a single suitable spinning program remains at the end, which is determined by the machine control on the basis of the said selection criteria by the selection routine. The selection routine may be a software program in which a corresponding algorithm for selecting the most suitable Abspinnprogrammes based on the aforementioned parameters is implemented.

A Abspinnprogramm, which is intended for the number range Ne 10 - 30, so for a rather coarse yarn, is characterized, inter alia, by increasing the yarn count by increasing the total delay to allow the tearing of the strong yarn. A Abspinnprogramm, which is intended for the number range Ne 70-100, so for a rather fine yarn, has in the Abspinnphase a reduction of the yarn count by reducing the Gesamtverzuges in the Abspinnphase on to prevent too fast tearing of the fine yarn.

The Abspinnprogramm therefore provides for a change in the yarn properties in the Abspinnphase. This change is preferably aimed at by changing the yarn count and / or by changing the yarn twist. The change of the yarn number is z. B. achieved by changing the total delay. A change in yarn twist can be achieved by changing the yarn delivery. The yarn delivery is controlled analogously to the delay by the speed of the drafting rollers.

Thus, the rotation of the yarn or the rotation coefficient (α) of a certain time by the Abspinnprogramm be changed so that as possible favorable conditions in the area of the clamping device and the lower wind crown for the insertion, the clamping or the tearing or cutting of the yarn when removing the yarn packages result. The yarn should not have too strong a rotation so that it is optimally able to be ripped or cut. On the other hand, the yarn should also not have an all-too-weak rotation, so that the yarn does not crack undesirably during spinning and during re-spinning after the bobbin change.

The corresponding control values in accordance with the spin-off program are preferably transmitted to the drives or the associated converters of the drafting system, the spindles and the ring rail, etc., so that a yarn having the desired spinning properties is produced at the latest at the time of the backwinding or during the backwinding , This is done by appropriate parameterization of the inverters of the named drives. In this case, the drives necessary for the Abspinnprozess control values are recorded, which, for. B. in the case of the drafting system, according to the speeds of the drafting rollers and thus affect the delivery and the total delay.

The Abspinnprogramm is therefore preferably started before or at the beginning of the creation of the backwinding at the end of the winding of a yarn package by the machine control. However, the spin-off program can also be called after the beginning of the backwinding. The spinning system with spindles, drafting and ring frame or spindle bank, or the associated drives, so preferably begins with the beginning of the backwinding or just before or when the ring frame reaches the position "yarn package full" (before the backwinding), with the spinning Parameterization to run.

The retaining device may comprise an underwinding and / or clamping device. In the underwinding device, the yarn is wound around a, in particular rough, surface and held without clamping. In the clamping device, the yarn is clamped, wherein the yarn can also be present in the clamping device as underwinding, in particular as a partial turn.

The retaining device for the yarn is preferably, i. especially in ring spinning machines, arranged in a position below the yarn package on the spindle. During the Abspinnprozesses the ring rail is driven from its uppermost Bewicklungspunkt creating the back turn down to the height of the retaining device. During the downward movement of the ring frame, the delivery speed in the drafting and the spindle speed can be coordinated so reduced that the desired yarn twist and yarn number is initially maintained and the yarn path on the yarn package as steep as possible. However, the Abspinnprogramm can change the delivery or the draft of the drafting during the creation of the backwinding such that a yarn with a changed yarn count arises, so that less disturbances before, during and after the underwinding in particular when removing the bobbins with the associated tearing of the yarn, as well as when restarting the spinning process after doffing.

The ring frame remains during one to several revolutions of the spindle in the lowest position in the retaining device. In a clamping device of the ring frame preferably remains only until the yarn is placed and clamped over half to three quarters of the circumferential length in the winding area. Subsequently, the ring frame is raised again to a position above the retaining device, whereupon then first the drafting system or the drafting device drive and then the spindle drive or both come to a standstill at the same time. The drafting system can be kept in operation for a short period of time after the underwinding has been completed in order to supply a yarn length.

In a particular embodiment of the invention, the Abspinnprogramm the lowering of the ring frame after completion of the yarn package between the upper turn and the underwinding in relation to the speed of the spindle and / or the delivery speed in the drafting vary so that at the yarn package between 0.5 and 5 back turns, ie Wraps with yarn, come to rest. The Abspinnprogramm can also the spindle after stopping let the drafting drive continue to rotate for a short period of time, or stop simultaneously with the drafting.

Above the slidable clamping device along the spindle an underwinding crown or a cutting ring is fixedly attached to the spindle, wherein the arrangement is designed so that in the clamping position for the yarn, the clamping device rests against the underwinding crown. The clamping device is pushed by the lower part of the spindle forth by a spring and can be moved by a separate actuator or directly through the ring frame during its movement in the lowest point down, ie in the open position.
When relatively coarse yarns are produced, the spinning program now influences the drafting system, in particular by increasing the overall draft, to the effect that a finer yarn count is produced in the spinning phase. A higher distortion of the fiber material presented is z. B. achieved by increasing the speed of the outlet rollers and / or by reducing the speed of the inlet rollers of the drafting system.

Accordingly, in the production of relatively fine yarns, preferably a smaller overall distortion of the fiber material presented in the spinning phase is aimed for by reducing the speed of the outlet rollers and / or by increasing the speed of the inlet rollers of the drafting system.

When producing a yarn with a given yarn count with a twist coefficient α ₁ , the spinning program can increase or decrease the rotation to another twist coefficient α ₂ at which the breaking load of the yarn reaches the best value.

The Abspinnprogramm can z. As during the creation of the backwinding or the underwinding in the production of jersey yarns give the fiber structure an additional rotation, and reduce the yarn twist in the production of crepe yarns.

einhalten,
mit T = Anzahl Drehungen, m = Längeneinheit, α_m = Drehungsbeiwert, N_m = Garnfeinheit, N = Spindeldrehzahl in Umdrehungen pro Minute, L = Lieferung in Meter pro Minute, wobei der Verlauf der Lieferung L über der Zeit oder die Drehzahl N vorgegeben sind und die Drehzahl N beim Hinter- bzw. Unterwindvorgang davon abhängig bzw. die Lieferung L davon abhängig berechnet wird.In a special embodiment of the invention, the Abspinnprogramm during the creation of the backwinding and / or the underwinding the condition $\frac{T}{m}={\alpha }_m\times \sqrt{N_m}=\frac{N}{L}$

comply
with T = number of rotations, m = unit of length, α _m = rotation coefficient, N _m = yarn count, N = spindle speed in revolutions per minute, L = delivery in meters per minute, whereby the course of delivery L is given over time or speed N and the rotational speed N in the rear or Unterwindvorgang dependent therefrom or the delivery L is calculated depending thereof.

Furthermore, in the preparation of the backwinding at the end of the winding of a yarn package Abspinnprogramm operate the machine control so that in deviation from the theoretically calculated spindle speed N over time with a reduced respectively increased spindle speed N (t) is driven.

In the production of effect, flame or knotted yarns, the spinning program should keep the speed of the drafting system or the delivery L constant at the latest from the time the backwinding is created, so that smooth yarn without effects is produced in the spinning phase.

The Abspinnprogramm can affect the driving program of the individual drives during the Abspinnphase not only to change the yarn count and speed, but also other, for. T. above already mentioned aspects of the Abspinnprozesses into the driving program. Such aspects may be: maintaining the yarn balloon or yarn tension during the spinning phase, the timing or change of yarn count or yarn twist during the spinning process (the yarn properties may be varied over the various phases of the spinning process, such as overwinding, backwinding, underwinding, etc.) changed several times) or the steepness of the stored yarn turns in the rear wind area. All in the mentioned patent publication DE 100 37 513 A1 detailed procedures during the Abspinnprozesses can also flow into the Abspinnprogramm. The content of DE 100 37 513 A1 is therefore an integral part of the present patent application in this regard.

The inventive method is preferably used in ring spinning machines. However, the method can also be used in funnel, bell or loop spinning machines. The Garnablage takes place instead of a moving ring rail with a moving spindle bank. With corresponding additional adjustments, the method is also suitable for pot spinning process. The spindles or the drafting rollers can each be driven individually or by a common drive, possibly with a transmission gear.

Fig. 1:

eine schematische Darstellung der Spinnstelle einer Ringspinnmaschine;

Fig. 2:

eine schematische Darstellung des Programmablaufs in der Maschinensteuerung.

In the following the invention will be described in detail with reference to the drawings. Show it:

Fig. 1:

a schematic representation of the spinning position of a ring spinning machine;

Fig. 2:

a schematic representation of the program flow in the machine control.

For the coordinated movement of the ring frame 5, the spindle 13 and the drafting rollers in the drafting system 3, the relevant drives such as drafting 4, ring frame drive 7 and spindle drive 12, as in Fig. 1 shown connected to the machine control 2. The drafting system 3 includes an inlet roller pair 15, a middle roller pair 16 and an outlet roller pair 17th

After completion of the cop 9 is, if provided, in the upper part first so-called upper turn and then, during the descent of the ring frame 5, the backwinding and finally the underwinding applied below the cop 9 on the spindle 13, whereupon the so-called Doffen, the Pulling off the cop or a plurality of cops takes place in the spinning machine. This phase starting with the rear wind is to be regarded as critical, since the transition from normal spinning operation to the standstill of the machine before Doffen and the subsequent start of the spinning machine most thread breaks occur or disturbances such as the unthreading of the yarn 14 may occur from the rotor 6, if there are no optimal conditions. Upon rapidly lowering the spindle speed N during the last phase of the cop trip, the yarn balloon 8 forming between the drafting equipment exit and the runner 6 around the cop 9 tends to collapse with loss of tension as the centrifugal force on the yarn decreases. This must be intercepted by simultaneous reduction of the delivery L from the drafting system 3 and by a suitable movement of the ring frame 5 down.

Fig. 2 shows the inventive program flow in the machine control 21. An operator selects via an input module 22, z. As a keyboard with screen, from a plurality of stored in the machine control 21 spin programs the desired spin program 23 from. As an alternative to this procedure, the operator can also enter the spinning parameters of a spinning program 23 manually or read them in electronically and deposit them in the machine controller 21.

The machine controller 21 calculates the driving program of the respective drives at the beginning of the spinning process on the basis of the selected spinning program 23 or the entered spinning parameters and the machine configuration data 24. Essential to the invention is now that in the machine control a plurality of Abspinnprogramms are deposited. Depending on which spinning program is run and what the machine configuration is, the suitable spinning program 26 is selected by the machine control 21 by means of a selection or selection module 25.

To initiate the Abspinnprozesses at the end of Kopsfüllungsprozess or (shortly) before the machine controller 21 starts the selected Abspinnprogramm and works it off, or drives the calculated from the Abspinnprogramm drive program for the drives. This means that the machine control system no longer works in this operating phase according to the spinning program but according to the selected Abspinnprogramm. The said Abspinnprogramm therefore replaces the actual spinning program in this phase.

It can be provided that an operator manually selects the Abspinnprogramm 26 from a plurality of Abspinnprogrammen. It can also be provided that the machine control gives the operator an appropriate recommendation for selection.

If the method according to the invention is applied to a funnel, bell or loop spinning machine, the moving spindle bank occurs instead of the moving ring rail. In addition, the spin-off program adds the control of the funnel motors.

The inventive method has the advantage that the Abspinnprogramm is already stored in the machine control. The operator no longer needs to input spinning parameters according to their own experience in the machine control.

Rather, the spin-off process is automated and can be performed by the machine control itself without the intervention of an operator. The method according to the invention thereby ensures that the machine control system always and without intervention in the control by an operator carries out an optimized stripping process.

Since the first approximately two meters of yarn are always cut away in the subsequent rewinding process and fed to the finish, it is expedient to run a spinning program by default for each spinning program in which the yarn properties are specifically changed. The Abspinnprogramm is therefore primarily designed to keep the spinning process stable in the Abspinnphase despite changing operating parameters, ie to avoid yarn breaks and other malfunctions, as well as to prepare the Garnendabschnitt for Kopswechselvorgang and the subsequent piecing process optimally.

It does not matter for reasons mentioned above that the yarn length produced during the Abspinnprogrammes does not meet the specifications of the spinning program, and therefore is not usable.

In principle, the piecing process, which is run before the actual spinning program, can be handled in an analogous manner by the machine control. For this purpose, a plurality of piecing programs can be stored on the computer. The machine control automatically selects the optimum piecing program by means of a selection program on the basis of a spinning program specified by the operator and the machine configuration. Again, the operator can manually select the piecing program as an alternative, possibly with appropriate recommendation by the machine control.

It goes without saying that the spinning or Abspinnprogramme can also be stored in one of the machine control superordinate control and called by this and the machine control can be dubbed for execution.

Furthermore, it is also possible that the operating parameters of the Abspinnprozesses for the drafting system drive are not just before the initiation of the Abspinnprozesses the drafting drive transmitted, but already stored in a memory before the drafting device drive and be called at or before the spin-off process by the machine control accordingly.

Claims (21)

Method for controlling a spinning machine, in particular a ring spinning machine, with a drafting device (3), a spindle (13) for receiving a yarn package (9), a ring frame (5) and / or a spindle bank, wherein the drafting system (3), the spindle (13) 13), the ring frame (5) and / or the spindle bank via associated drives (4, 7, 12) coordinated by a machine control (2, 21) are kept in operation, and with a holding device (10) for the yarn (14) .
characterized in that
in the machine control (2, 21) a plurality of Abspinnprogrammen are stored and by the machine control (2, 21) or by an operator via an input unit from the plurality of Abspinnprogrammen depending on: - the spun yarn number (Ne) and / or - of the spun yarn type and / or - The yarn twist (α) and / or - the spun raw materials and / or - the machine configuration
a suitable Abspinnprogramm (26) is selected, wherein the Abspinnprogramm performs a targeted change in the yarn properties during the Abspinnprozesses compared to the yarn according to the spinning program (23) yarn to achieve an optimally adapted for the Abspinnprozess, the bobbin changing process and / or the subsequent Anspinnprozess Garnfestigkeit , Method according to claim 1, wherein the machine controller (2, 21) is made up of a plurality of take-off programs stored in the machine control (2, 21) as a function of: - the spun yarn number (Ne) and / or - of the spun yarn type and / or - The yarn twist (α) and / or - the spun raw materials and / or - the machine configuration
via a, preferably stored in the machine control, selection routine automatically selects the appropriate Abspinnprogramm (26) and automatically calls at the given time. Method according to one of claims 1 or 2, wherein the machine controller (2, 21) from a plurality of Abspinnprogramms stored in the machine control (2, 21) depending on the current spinning program (23) and the machine configuration (24) via a selection routine (25 ) or an operator selects the appropriate Abspinnprogramm (26) by means of input device (22), wherein the spinning program (23) determines the yarn count (Ne), the yarn type and / or the yarn rotation (α), and the machine control (2, 21) for given time automatically initiates the selected Abspinnprogramm (26). Method according to one of claims 1 to 3, wherein the Abspinnprogramm (26) provides for a change in the yarn count by changing the Gesamtverzuges. Method according to one of claims 1 to 4, wherein the Abspinnprogramm (26) provides a change in Garndrehung by changing the yarn delivery. The method of claim 5, wherein the rotation of the yarn or the rotation coefficient (α) from a certain point in time by the Abspinnprogramm (26) is changed so as to give the best possible yarn properties for the stored in the holding device yarn. Method according to one of claims 1 to 6, wherein the Abspinnprogramm (26) prior to the start of the Abspinnprozesses by parameterization of the inverter of the drives, in particular the drafting unit drives, is called. A method according to claim 4, wherein in the production of relatively coarse yarns the spinning program (26) influences the drafting system (3) by altering, in particular by increasing, the total warpage to produce a finer yarn in the spinning phase. A method according to claim 4, wherein in the production of relatively fine yarns, the spinning program (26) influences the drafting system (3) by altering, in particular by reducing, the total draft to produce a coarser yarn in the spinning phase. Method according to one of claims 1 to 9, wherein the Abspinnprogramm (26) for the purpose of changing the delay in the Abspinnphase makes a change in the speed of the inlet (15), and / or outlet roller pair (17). Method according to one of claims 1 to 10, wherein the Abspinnprogramm (26) for the purpose of changing the delivery in the Abspinnphase makes a change in the speed of the inlet (15), middle (16) and / or outlet roller pair (17). A method according to any one of claims 1 to 11, wherein the yarn holding device is located at a position below the yarn package (9) on the spindle (13), and during the spinning process, the ring rail is lowered from its uppermost winding point to create an underwinding the height of the retaining device is moved, and applied to the retaining device an underwinding and / or a yarn section is clamped, and the ring frame (5) is then raised again to a position above the clamping device (10), then what first the drafting system (3) or the drafting device drive (4) and then the spindle drive (12) or both come to a standstill at the same time. Method according to one of claims 1 to 12, wherein in the production of a yarn (14) with a predetermined yarn count with a rotation coefficient α ₁ the Abspinnprogramm (26) increases or decreases the rotation to another rotation coefficient α ₂ , in which the breaking load of the yarn (14) reaches the lowest value. Method according to one of claims 1 to 13, wherein the spinning program (26) changes the draft of the drafting system (3) during the creation of the backwinding such that a yarn of a changed number is produced, so that fewer disturbances occur before, during and after the windrowing, the clamping and / or during the removal of the yarn package (9) from the spindle and the associated tearing off of the yarn (14) result. Method according to one of claims 1 to 14, wherein the Abspinnprogramm (26) before or at the latest in the preparation of the backwinding and / or the underwinding the condition $\frac{T}{m}={\alpha }_m\times \sqrt{N_m}=\frac{N}{L}$

comply,
with T = number of rotations, m = unit of length, α _m = rotation coefficient, N _m = yarn count, N = spindle speed in revolutions per minute, L = delivery in meters per minute, whereby the course of delivery L is given over time or speed N are and the speed N in Hinter- or Unterwindevorgang dependent thereof or the delivery L thereof is calculated depending. Method according to one of claims 1 to 15, wherein in the preparation of the backwinding at the end of the winding of a yarn package (9) the Abspinnprogramm (26), the machine control (2, 21) operates such that in deviation from the theoretically calculated spindle speed N on the Time is driven at a reduced or increased speed N (t). Method according to one of claims 1 to 16, wherein the Abspinnprogramm (26), in particular during the production of jersey yarns, prior to or during the creation of the backwinding and / or the underwinding gives the fiber structure an additional rotation. Method according to one of claims 1 to 16, wherein the Abspinnprogramm (26), especially in the production of crepe yarns, reduces the yarn twist before or during the preparation of the backwinding and / or the underwinding. Method according to one of claims 1 to 18, wherein in the production of effect, flame or nub yarns the Abspinnprogramm (26) before or during the preparation of the backwinding and / or the underwinding to the speed of the drafting system (3) or the delivery L keeps constant so that in the Abspinnphase smooth yarn without effects arises. Method according to one of claims 1 to 19, wherein the Abspinnprogramm (26) the lowering speed of the ring frame (5) after completion of the yarn package (9) between the upper turn and the underwinding in relation to the speed of the spindle (13) and / or the delivery speed in Drafting (3) varies so that at the yarn package (9) between 0.5 and 5 back turns, so wraps with yarn (14) come to rest. Method according to one of claims 1 to 20, wherein the Abspinnprogramm (26) continues to rotate the spindle (13) after stopping the drafting device drive (4) for a short period of time, or stops simultaneously with the drafting system (3).

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