DE102020134251A1 - Method for operating a partially or fully automatic spinning machine, in particular an open-end rotor spinning machine, and spinning machine - Google Patents

Abstract

In a method for operating a partially or fully automatic spinning machine (1), in particular an open-end rotor spinning machine, with a large number of similar, at least partially self-sufficient work stations (2) arranged next to one another, each of the work stations (2) having a spinning device (3) for Production of a yarn (5) and a winding device (19) for winding the yarn (5) onto a spool (6), the jobs (2) are divided into several production groups (18). Several work stations (2) producing the same batch of yarn each form a production group (18). When the end of a batch is reached at one of the work stations (2), the relevant work station (2) is shut down. To carry out a lot change at the relevant work station (2), the work station (2) can be operated either in a preparatory mode or in a normal mode, with batch data of the new yarn lot being initially assigned to the work station (2) in the preparatory mode and automatic piecing of the work station ( 2) is prevented and in the normal mode the work station (2) is assigned lot data to the new yarn lot and the work station (2) starts spinning automatically. A corresponding partially or fully automatic spinning machine (1), in particular an open-end rotor spinning machine, has a control device (13, 14) for carrying out the method.

Description

The present invention relates to a method for operating a partially or fully automatic spinning machine, in particular an open-end rotor spinning machine, with a large number of identical, at least partially self-sufficient work stations arranged next to one another, each of the work stations having a spinning device for producing a yarn and a winding device for winding up the yarn Having yarn on a spool. The jobs are divided into a number of production groups, with a number of jobs producing the same batch of yarn each forming a production group. When the end of a batch is reached at one of the work stations, the work station in question is shut down.

Partly or fully automatic spinning machines are known in various designs in the prior art. The work stations of these spinning machines each have a spinning device with a spinning element, for example an open-end spinning rotor or an air spinning device, for producing a yarn, a winding device for winding the produced yarn onto a bobbin and a large number of other elements for producing and handling the yarn and the submitted fiber material. Essential components for the production of the yarn are the so-called spinning means, which in a rotor spinning machine include, among other things, the spinning rotor, the draw-off nozzle, if necessary an additional twisting element and the opening roller.

If a so-called batch change is to be carried out on a spinning machine or at an individual work station, i. H. If a yarn with different properties than before is to be produced, a large amount of conversion work is usually required at the individual work stations. Both the fiber material presented and at least some of the spinning equipment often have to be replaced. In other cases, however, it is only necessary to change a few operating parameters of the spinning machine or the work station and, if necessary, to provide other empty tubes.

In spinning machines with at least partially self-sufficient work stations, which can independently carry out at least one piecing process using operating elements arranged at the work stations and in which at least the spinning element can be driven individually, it is possible to produce different yarn lots at the individual work stations. A so-called “flying” or “sliding” batch change is also possible on such machines. This means that the work stations of a production group can finish the old batch of yarn and start the new batch of yarn individually and independently of one another. In any case, the prerequisite for this is that the spinning equipment required for the new yarn lot and the fiber material required for the new yarn lot are available at the work stations.

the EP 2 762 617 B1 proposes for such a flying lot change that a work station which has reached the end of the lot issues a signal indicating the end of the lot. This signals to the operator that manual steps such as changing the spinning components are required for the lot change. As soon as the operator has carried out these steps, he releases the job in question. The released work station then calls up the new lot data and starts the new yarn lot. The unproductive downtimes of the workplaces can be reduced as a result. The document does not provide any information on how the batch change is carried out if no conversion work is required at the work sites. If, however, no conversion work is required for a lot change, this method involves unnecessary waiting times for the work stations. It is also sometimes necessary to adapt the lot data to current circumstances.

It is therefore the object of the present invention to propose a method for operating a spinning machine and a spinning machine which enable a further optimized, sliding lot change.

The object is achieved by a method and a spinning machine with the features of the independent patent claims.

In a method for operating a partially or fully automatic spinning machine, in particular an open-end rotor spinning machine, with a large number of similar, at least partially self-sufficient work stations arranged next to one another, each of the work stations has a spinning device for producing a yarn and a winding device for winding the yarn on a coil up. At least partially self-sufficient means that the work stations can independently carry out a piecing process by means of operating elements arranged at the work stations and have at least one spinning element that can be driven individually. The large number of jobs is divided into a number of production groups, with a number of jobs producing the same batch of yarn each forming a production group. When the end of a batch is reached at one of the work stations, the work station in question is shut down.

It is suggested that to carry out a lot change at the concerned Job of this job lot data of the new yarn lot are assigned and the job is put into a preparation mode in which an automatic piecing of the job is prevented. The at least partially self-sufficient work stations of the spinning machine are able to carry out a batch change independently and to start a new batch through automatic piecing. It is conceivable to operate each individual job either in the preparation mode or in the normal mode. Operation either in the preparation mode or in the normal mode can preferably be selected jointly for all work stations in a production group, ie the preparation mode can be activated and deactivated jointly for all work stations in a production group.

A corresponding partially or fully automatic spinning machine, in particular an open-end rotor spinning machine, with a large number of similar, at least partially self-sufficient work stations arranged next to one another, with each of the work stations having a spinning device for producing a yarn and a winding device for winding the yarn onto a spool, the Jobs can be divided into several production groups, with several jobs producing the same batch of yarn each forming a production group, has a control device for carrying out the method.

Since the work station is now assigned the new lot data after the work station has been shut down and before any operator intervention, the work station is basically ready to start the new lot with automatic piecing, provided the correct spinning means and the correct fiber material are available for the new one Yarn lot present. If no changeover work is required, the work station in question could thus carry out the entire batch change independently without operator intervention. Likewise, in the event that changeover work is required, the work station in question can carry out the batch change independently as soon as the operator has carried out the changeover work. However, because the work station is first put into the preparation mode, in which automatic piecing is prevented, it is possible to prevent the lot change at the relevant work station despite the basic training for independent lot change and, if necessary, to start the lot change manually. This makes it possible, for example, to check the yarn properties at the relevant work station after the batch has started. It is also possible to adapt the batch data assigned to the work station if, for example, the operator has different empirical values and/or the quality of the spun yarn does not correspond to the desired one. The preparation mode can thus prevent an automatic, on-the-fly lot change from being carried out at the work stations before any fine adjustment of the spinning parameters and any subsequent adjustment of the lot data may be required, and possibly a yarn being produced at several work stations that does not meet the requirements.

It is therefore advantageous if the work station in question, which is in the preparation mode, starts spinning and starts the new yarn batch only after approval by an operator. This enables the operator to check the yarn properties of the yarn produced at the relevant work station, to make certain fine adjustments to the spinning parameters at the work station and, if necessary, to adjust the batch data.

Accordingly, it is also advantageous if, after the start of the new batch of yarn, the yarn properties, in particular a yarn count, of the newly produced yarn are checked at the relevant work station. If the yarn properties do not correspond to the desired yarn properties, the lot data can be changed if necessary, so that the other work stations of the same yarn lot can start with the changed lot data. It may also be necessary to start the work station in question manually several times or to trigger the piecing process manually, to check the yarn properties in each case and to adjust the batch data several times. It goes without saying that this process can be carried out not only at a single work station, but also in parallel or in quick succession at several work stations of the relevant yarn lot.

Furthermore, it is advantageous if the preparation mode is deactivated after approval by the operator or after checking the yarn properties. It is in turn advantageous if the preparation mode is deactivated centrally for all work stations of the same production group. The operator can thus initiate the independent execution of the lot change by the work stations at the other work stations of the same yarn lot as soon as it is ensured that the desired yarn properties are achieved and the lot data, if necessary after an adjustment as described above, contain the necessary settings for this.

Accordingly, it is advantageous if, after the deactivation of the preparation mode, the other work stations of the same production group start spinning independently and the new batch of yarn start. The other work stations of the production group can thus carry out the batch change automatically without operator intervention. The time required for the lot change can thereby be shortened and unproductive downtimes of the work stations can be further reduced.

There are also advantages if the preparation mode is first activated when starting a new batch of yarn for all jobs in the same production group. In this way, it can be ensured that before an automatic lot change takes place at a plurality of work stations, an operator checks again at at least one work station. The check can include, for example, the design of spinning means and spinning material, the yarn properties of the yarn produced, batch data or the setting of spinning parameters.

It is also advantageous if the lot data contain information on the spinning means required for the yarn lot and the fiber material required. This makes it easy to check whether the spinning means available at the work site and/or the fiber material present are correct, which is preferably done by the work site itself.

It is also advantageous if the need for an exchange of the spinning means and/or the fiber material is determined independently by the work station in question and is indicated to the operator, in particular by a display element assigned to the work station. The operator therefore does not have to independently determine whether such manual interventions are necessary, but is instructed accordingly by the display at the work site.

There are also advantages if, when the preparation mode is activated, the work station in question is switched to the preparation mode after the spinning elements and/or the fiber material have been checked and/or exchanged.

According to another embodiment of the method, it is advantageous if, with the preparation mode deactivated, the work station in question starts spinning after checking and/or exchanging the spinning elements and/or the fiber material and starts the new batch of yarn.

There is therefore a double check at least at the first work station that carries out the lot change: In a first step, the operator must check and confirm the correctness of the fiber material and the spinning means. In the second step, the operator can start the batch change manually in order to check the yarn properties and, if necessary, make batch data settings. Alternatively, if no checking of the yarn properties is required, the operator can also deactivate the preparation mode in the second step, so that the relevant work station can start the new yarn lot automatically and independently.

Furthermore, it is advantageous if the work stations are independently assigned to one of the production groups by a control device of the spinning machine, in particular a machine control. The yarn lots to be produced can be planned in advance without the operator having to assign the individual work stations to the different yarn lots. In this way, it is possible to react flexibly to events on the spinning machine and, for example, jobs where problems frequently occur cannot be assigned, or they are only assigned to yarn lots with lower requirements.

It is also advantageous if the control device predefines conditions for the automatic assignment of the work stations. In this way, individual configurations of the work stations with spinning means as well as individual conditions at the work stations and differences in the type and quality of the yarn to be produced can be taken into account.

It also has advantages if a test batch is produced at one or more work stations before a batch change is carried out, with batch data for the test batch being assigned to the relevant work station or stations. The test game data can also contain settings that are not suitable for regular production. The production of a test lot can be particularly advantageous if no suitable lot data is available for a specific yarn. The lot data for this new yarn lot are first determined by means of the test lot. In order to determine the optimal game data, the test game data can be greatly reduced compared to regular game data and, for example, also provide for manual intervention. For example, it can be provided to insert empty tubes manually, to change wound bobbins manually or to carry out a rotor cleaning manually.

• 1 eine Spinnmaschine in einer schematischen Vorderansicht als Übersichtsdarstellung und
• 2 eine Arbeitsstelle einer Spinnmaschine in einer schematischen, teilweise geschnittenen Seitenansicht.

Further advantages of the invention are described in the following exemplary embodiments. Show it:

• 1 a spinning machine in a schematic front view as an overview and
• 2 a work station of a spinning machine in a schematic, partially sectioned side view.

In the following description of the figures, the same reference symbols are used for features that are identical or at least comparable in the individual embodiments or the individual figures. Some of the features are therefore only explained when they are first mentioned or only once using a suitable figure. If these features are not explained separately again in connection with the other figures, their design and/or mode of action corresponds to the design and mode of action of the identical or comparable features described. For reasons of clarity, if there are several identical features or components in a figure, only one or only a few of them are labeled.

1 shows a schematic front view of a spinning machine 1 in an overview. The spinning machine 1 is designed as an automatic or at least semi-automatic spinning machine 1 and has a large number of similar work stations 2 arranged next to one another, which are arranged between two frames 9 . Each of the work stations 2 has a feed device 4 for a fiber material 7, which in the case of an open-end rotor spinning machine is a feed roller 16 (see 2 ) and an opening roller 12 (see 2 ) is trained. In the case of an air-jet spinning machine, on the other hand, the feed device 4 contains a drafting system (not shown).

Furthermore, each of the work stations 2 has a spinning device 3 for producing a yarn 5 , a withdrawal device 11 for withdrawing the yarn 5 produced and a winding device 19 for winding the yarn 5 produced onto a bobbin 6 . The jobs 2 are designed as at least partially self-sufficient jobs. This means that the work stations 2 have at least one individually drivable spinning element, for example a spinning rotor 10 (see Fig. 2 ) or have an air spinning nozzle, so that the individual work stations 2 can also be operated independently of the other work stations 2 of the spinning machine 1. Furthermore, the work stations 2 can at least remedy the piecing independently after a yarn break or clearer cut, without an operating robot or the intervention of an operator being required for this. For this purpose, further components, not shown here, such as handling organs and maintenance organs, are arranged at the work stations 2 .

In the present example, a display element 20 is also provided at each of the work stations 2, which can display, for example, different operating states of the work stations 2 or the yarn batch produced in each case. As an alternative to the representation shown, it is also conceivable for two work stations 2 to be jointly assigned a display element 20 . The spinning machine 1 also has a machine control 14 which controls at least the central and higher-level processes on the spinning machine 1 . A memory 15 is assigned to the machine control 14 . To control the processes at the individual work stations 2, as in 2 shown, work station controls 13 may be provided, which interact with the machine control 14 and possibly other control devices of the spinning machine 1.

On such spinning machines 1 with at least partially self-sufficient work stations 2, it is possible to produce several yarn lots at different work stations 2 at the same time. For this purpose, the work stations 2 are divided into a number of production groups, with a number of work stations 2 producing the same batch of yarn each forming a production group 18 . Three production groups 18 are currently shown on the present spinning machine 1 . It goes without saying that in the case of a double-sided spinning machine 1 further work stations 2 are also arranged on the longitudinal side of the spinning machine 1 opposite the visible longitudinal side. A production group 18 can also include work stations on both long sides of the spinning machine 1 .

A batch change from an old yarn batch that is still up-to-date to a new yarn batch can also be carried out at a single workstation 2 in spinning machines 1 with at least partially self-sufficient workstations 2, without having to wait for the end of the batch to be reached at the other workstations 2 belonging to the same production group 18 .

2 shows a work station 2 of such a spinning machine 1 in a side view. The spinning machine 1 is designed as an open-end rotor spinning machine and has a feed roller 16 and an opening roller 12 as the feed device and a spinning rotor 10 as the spinning element of the spinning device 3 . The yarn 5 produced in the spinning rotor 10 is drawn off via a draw-off nozzle 17 and fed to the winding device 19 . In particular, the spinning rotor 10 and the draw-off nozzle 17, but also the opening roller 12, form important technological parts that help determine the yarn quality, and are referred to as spinning means 8. An additional twisting element 22 is also shown here, which is also one of the spinning means. In the present job 2 shown is not only the spinning rotor 10 by means of a single Ant riebs 21 driven, but also the other working elements of the job 2 such as the feed roller 16, the opening roller 12, the withdrawal device 11 and the winding device 6 are driven by a single drive 21. However, it is also conceivable to drive some of the other working elements centrally.

In order to carry out a lot change, the work stations 2 of a new production group 18 (see 1 ) assigned. This is preferably done in advance as part of the production planning or only after the end of the lot has been reached. Work station 2 is shut down when the end of the batch is reached. The lot data of the new yarn lot are then already assigned to the relevant work station 2. For this purpose, lot data for different yarn lots are usually stored in the memory 15 . These were empirically determined, for example, in earlier games and have already been optimized where necessary. Alternatively, it is also conceivable that the spinning machine 1 is connected to a higher-level computer in which various batch data are stored. The batch data usually contain spinning parameters such as the rotor speed, the rotation, the delay and, if necessary, other speeds of working elements. Preferably, the lot data also contain information about the spinning means 8 required for the yarn lot, in particular spinning rotors 10 and draw-off nozzles 17, as well as the fiber material 7 required for the respective lot.

Therefore, after the work station 2 has been shut down, retooling work is often required, which includes replacing the fiber material 7 and/or part of the spinning means 8 . It is usually also necessary to provide other empty shells (not designated). This must be performed and confirmed by an operator. As soon as the operator has confirmed the exchange of the spinning means 8 and/or the fiber material 7, the work stations 2 can start spinning independently and start the new batch of yarn. In many cases, however, the same fiber material 7 and the same spinning means 8 can be used for the subsequent yarn lot. In the latter case, the work station 2 is able to carry out a lot change automatically, completely independently and without user intervention, by means of the machine control 14 and/or its work station control 13 .

The work stations 1 thus gradually complete the coils 6 of the old yarn lot for a sliding lot change, retrieve the lot data of the new yarn lot and start with the new yarn lot. In this case, a batch change can be carried out particularly quickly, in a time-saving manner and without loss of production.

However, it is often still necessary to examine the yarn 5 and in particular to check yarn properties such as the yarn count in the laboratory. It may also be necessary to adjust the batch data, in particular spinning parameters, again if the properties of the yarn 5 produced do not correspond to the desired yarn properties. In this case, a lot change carried out independently would result in larger quantities of a faulty yarn 5 being produced at several work stations 2 under certain circumstances. After the lot data of the new yarn lot has been assigned, the work stations 2 are first put into a preparation mode in which the automatic piecing of the work stations 2 is prevented. The preparation mode prevents the production of faulty yarn 5 after a batch change that has been carried out independently. However, in order to keep the unproductive downtimes of the work stations 2 as low as possible, a work station 2 can be started manually by simply enabling an operator. Likewise, the preparation mode can also be deactivated quickly by an operator.

The operator can thus start the new yarn batch at just one or a few workstations 2 by manually releasing the relevant workstation(s) 2, check the yarn properties of the newly produced yarn 5 and, if necessary, adjust the batch data. The other work stations 2 of the new yarn lot are meanwhile still in the preparation mode. If necessary, however, they can also start piecing manually with operator approval and start the new yarn lot. As soon as the yarn 5 produced has the desired yarn properties at the manually started work station(s) 2, the preparation mode can now be deactivated at the other work stations 2, so that the other work stations 2 can now carry out the work quickly and independently. The deactivation of the preparation mode can take place, for example, for each individual work station 2 at the work station 2 itself. In order to minimize unnecessary downtimes and to carry out the lot change as quickly as possible, it is additionally or alternatively particularly advantageous if the preparation mode can be deactivated centrally for all work stations 2 of the production group 18 together. The deactivation can take place, for example, by operator input at the machine control 14 . This is also advantageous when it is to be expected that after a batch change, the newly produced yarn 5 will have the desired yarn properties. This can be expected, for example, when the same batch of yarn has already been produced on the spinning machine 1 beforehand. In this case, the operator can use the preparation mode centrally and for all work stations 2 of the production quickly deactivate group 18 so that workstations 2 can carry out the lot change independently and without operator intervention.

Even when there is a batch change with an exchange of the spinning means 8 and/or the fiber material 7, yarn properties of the newly produced yarn 5 often still have to be checked. Even if the operator has already converted all of the work stations 2 affected by a lot change and these could therefore start spinning independently and start the new yarn lot, it can therefore be advantageous to first put the work stations 2 into the preparation mode. The preparation mode is therefore preferably initially activated for all work stations 2 of the same production group 18 when a new batch of yarn is started.

The preparation mode can be used to provide a uniform procedure for both types of batch change (with or without conversion work at work stations 2). This simplifies the procedure for the operator and ensures that no faulty yarn 5 is produced. Since the preparation mode can be activated or deactivated as required, batch changes can be implemented as quickly as possible without unnecessary downtimes for every situation. Since the batch data contain information on the spinning means 8 required for the yarn batch and the fiber material 7 required, the work stations 2 can independently determine whether these need to be exchanged for the batch change. If this is the case, a corresponding message is output to the operator, which can be done, for example, by displaying a need for maintenance on the display element 20 of the respective work station 2 . The operator can then exchange the spinning means 8 and/or the fiber material 7 and confirm the exchange. If the preparation mode is activated, work station 2 is then initially put into the preparation mode. If, on the other hand, the preparation mode is deactivated, then after confirmation of the exchange of the spinning means 8 and/or the fiber material 7, the work station 2 can begin spinning directly and start the new batch of yarn. If, on the other hand, no exchange of spinning means 8 and/or fiber material 7 is necessary, the work station 2 is also initially put into the preparation mode when the preparation mode is activated. If the preparation mode is deactivated, however, work station 2 can also start the new yarn lot immediately.

In addition, the production planning on the spinning machine 1 is facilitated by the preparation mode and by the independent checking of the need to exchange the spinning means 8 and/or the fiber material 7 . For example, it is possible to specify yarn lots to be produced on the spinning machine 1 in advance. The machine control 14 can then independently assign the work stations 2 to the individual production groups 18 on the basis of predetermined conditions, which can be stored in the memory 15 together with the batch data of the yarn batches. The machine control 14 takes into account, for example, the equipment of the individual work stations 2 with spinning means 8 or fiber material 7. Likewise, a condition of certain working organs of the individual work stations 2 or the possibilities of supplying empty tubes can also be taken into account. The spinning machine 1 can then independently start the individual yarn lots or carry out the lot change independently. User intervention is only necessary when spinning means 8 and/or fiber material 7 have to be replaced or yarn properties have to be checked.

The present invention is not limited to the illustrated and described embodiments. Modifications within the scope of the patent claims are just as possible as a combination of the features, even if they are shown and described in different exemplary embodiments.

Reference List

1

spinning machine

2

place of work

3

spinning device

4

feeding device

5

yarn

6

Kitchen sink

7

fiber material

8th

spinning means

9

frame

10

spinning rotor

11

trigger device

12

opening roller

13

job control

14

machine control

15

Storage

16

food roller

17

trigger nozzle

18

production group

19

spooling device

20

display element

21

single drive

22

twist element

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 2762617 B1 [0005]

Claims (17)

Method for operating a partially or fully automatic spinning machine (1), in particular an open-end rotor spinning machine, with a large number of similar, at least partially self-sufficient work stations (2) arranged next to one another, each of the work stations (2) having a spinning device (3) for producing a Yarn (5) and a winding device (19) for winding the yarn (5) onto a bobbin (6), the work stations (2) being divided into a number of production groups (18), with a number of work stations (2) producing the same batch of yarn each form a production group (18), and when the end of a batch is reached at one of the work stations (2), the relevant work station (2) is shut down, characterized in that in order to carry out a batch change at the relevant work station (2), the work station (2) can be operated either in a preparatory mode or in a normal mode, wherein in the preparatory mode of the job (2 ) lot data are first assigned to the new yarn lot and automatic piecing of the work station (2) is prevented and where in the normal mode of the work station (2) lot data are assigned to the new yarn lot and the work station (2) starts piecing automatically. Method according to the preceding claim, characterized in that the work station (2) in question, which is in the preparatory mode, only starts piecing after approval by an operator and the new batch of yarn starts. Method according to one of the preceding claims, characterized in that after the start of the new batch of yarn in the preparation mode at the relevant work station (2) the yarn properties, in particular a yarn number, of the newly produced yarn are checked. Method according to one of the preceding claims, characterized in that after the release by the operator or after checking the yarn properties, the preparation mode is deactivated at the work station (2) in question. Method according to one of the preceding claims, characterized in that the preparation mode is deactivated centrally for all work stations (2) of the same production group (18). Method according to one of the preceding claims, characterized in that after the deactivation of the preparation mode, the other work stations (2) of the same production group (18) start spinning independently and start the new yarn lot. Method according to one of the preceding claims, characterized in that the preparation mode is first activated at the start of a new batch of yarn for all work stations (2) of the same production group (18). Method according to one of the preceding claims, characterized in that when the preparation mode is activated, the work station (2) in question is switched to the preparation mode after the spinning elements (8) and/or the fiber material (7) have been checked and/or exchanged. Method according to one of the preceding claims, characterized in that when the preparation mode is deactivated, the work station (2) in question starts spinning after checking and/or replacing the spinning elements (8) and/or the fiber material (7) and starts the new batch of yarn. Method according to one of the preceding claims, characterized in that the batch data contain information on the spinning means (8) required for the yarn batch and the fiber material (7) required. Method according to one of the preceding claims, characterized in that the need for an exchange of the spinning means (8) and/or the fiber material (7) is determined independently by the relevant work station (2) and/or the spinning machine (1) and displayed to the operator is displayed, in particular by a display element (20) assigned to the work station (2). Method according to one of the preceding claims, characterized in that when the preparation mode is activated, the work station (2) in question is switched to the preparation mode after the spinning elements (8) and/or the fiber material (7) have been checked and/or exchanged. Method according to one of the preceding claims, characterized in that when the preparation mode is deactivated, the work station (2) in question starts spinning after checking and/or replacing the spinning elements (8) and/or the fiber material (7) and starts the new batch of yarn. Method according to one of the preceding claims, characterized in that the Work stations (2) are assigned independently to one of the production groups (18) by a control device (13, 14) of the spinning machine (1), in particular a machine control (14). Method according to one of the preceding claims, characterized in that the control device predefines conditions for the independent assignment of the work stations. Method according to one of the preceding claims, characterized in that before a batch change is carried out, a test batch is produced at one or more work stations (2), batch data for the test batch being assigned to the relevant work station or stations (2). Semi or fully automatic spinning machine (1), in particular an open-end rotor spinning machine, with a large number of similar, at least partially self-sufficient work stations (2) arranged next to one another, each of the work stations (2) having a spinning device (3) for producing a yarn (5) and has a winding device (19) for winding the yarn (5) onto a bobbin (6), the work stations (2) being divisible into a number of production groups (18), with a number of work stations (2) producing the same batch of yarn each forming a production group (18 ) form, and with a control device (13, 14) for carrying out the method according to any one of the preceding claims.

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