DE102020106124A1 - Method for operating a spinning machine and spinning machine - Google Patents

Abstract

Method for operating a spinning machine (1), in particular an open-end spinning machine, with a plurality of work stations (2) arranged next to one another, each of the work stations (2) having a feed device (4) for a fiber material (7), a spinning device (3) with spinning means ( 8) for spinning the fiber material (7) into a thread (5) and a pull-off device (19) for pulling off the thread (5), characterized in that a precision measuring head (10) for detecting a Quality of the thread (5) is arranged so that at the beginning of a new yarn section (18) at the at least one work station (2), lot-related, optimized spinning parameters and / or lot-related, optimized spinning means (8) are determined, whereby to determine the optimized spinning parameters and / or spinning means is detected by means of the precision measuring head (10) at least one quality parameter of the thread (5) and depending on a detected value of the little At least one quality parameter, the spinning parameters of the spinning device (3) are set and / or the spinning means (8) are selected and inserted into the spinning device (3), and that the thus determined, optimized spinning parameters and / or optimized spinning means (8) by means of at least one Control device (17) can be transferred to further work stations (2) of the spinning machine (1) processing the same yarn section (18).

Description

The present invention relates to a method for operating a spinning machine with a plurality of workstations arranged next to one another, each of the workstations having a feed device for a fiber material, a spinning device with spinning means for spinning the fiber material into a thread and a withdrawal device for drawing off the thread. The invention also relates to a corresponding spinning machine in which at least one control device is also provided.

At the workplaces of a spinning machine, a spinning device is supplied with a fiber material from a feed device. The feed device contains, for example, a feed roller and an opening roller on a rotor spinning machine and a drafting device on an air-jet spinning machine. The fiber material is then spun into a thread in the spinning device. For this purpose, the spinning device has various spinning means for the actual spinning of the fiber material, for pulling off the thread and, if necessary, also for feeding in the fiber material. Depending on the later use of the spun thread, certain yarn properties are desired or compliance with a certain quality specification is necessary for the yarn. It is therefore already known to check the quality of the spun thread by means of a sensor before it is wound onto a winding bobbin. If a defect, in particular a thick or thin point, is discovered in the thread, production at the relevant work site is interrupted and the defective piece of yarn is removed.

From the EP 2 671 832 B1 It has also become known to detect not only thick and thin places, but also the hairiness of the yarn on a winding device of a winder. If a flaw is detected in the thread delivered by a pay-off bobbin, the thread is cut as described above and the defective piece of thread is removed. The thread end delivered by the pay-off bobbin is then connected again to the other bobbin end on the take-up bobbin. In this way, a particularly high quality yarn can be produced. However, the yarn defects can only be cut out of the yarn that has already been produced afterwards.

The yarn quality is largely dependent on the operating conditions at the work sites. At the beginning of a new yarn batch it is therefore necessary, depending on the type of yarn desired, to use certain spinning means such as rotor types or take-off nozzles and / or to make certain settings at the respective work stations. the EP 2 762 617 A1 describes a method for optimizing such a lot change. Suitable basic settings for the spinning parameters such as draft, yarn twist and rotor speed are stored in a central computer of the machine for the new batch and are then transferred to the workplaces that are to start the new batch. However, given the different conditions on the spinning machines, such as tolerances, wear conditions and the like, these basic settings do not always lead to a yarn of the desired quality.

The object of the present invention is therefore to propose a method for operating a spinning machine and a spinning machine which enable the spinning parameters to be set in an improved manner.

The object is achieved with the features of the independent claims.

In a method for operating a spinning machine, in particular an open-end spinning machine, with a large number of workstations arranged next to one another, each of the workstations has a feed device for a fiber material, a spinning device with spinning means for spinning the fiber material into a thread and a withdrawal device for drawing off the thread.

It is now provided that a precision measuring head for detecting the quality of the thread is arranged at at least one of the work stations and that at the beginning of a new yarn section at the at least one work station, lot-related, optimized spinning parameters and / or lot-related, optimized spinning means are determined. For this purpose, at least one quality parameter of the thread is recorded by means of the precision measuring head. Depending on a recorded value of the at least one quality parameter, the spinning parameters of the spinning device are then set and / or the spinning means are selected and inserted into the spinning device. The optimized spinning parameters and / or optimized spinning means determined in this way are then transmitted by means of at least one control device to further work stations of the spinning machine that process the same yarn section.

A spinning machine, in particular an open-end spinning machine, in particular for carrying out the aforementioned method, has a large number of workstations arranged next to one another, each of the workstations having a feed device for a fiber material, a spinning device with spinning means for spinning the fiber material into a thread and a take-off device for drawing off the thread . Furthermore, at least one control device is provided.

In the spinning machine, at least one precision measuring head for detecting a quality of the thread is arranged at at least one of the workplaces, which detects at least one quality parameter of the thread and outputs the detected value of the at least one quality parameter and / or transmits it to the control device and / or to an evaluation unit. The control device is designed to transfer batch-related, optimized spinning parameters and / or batch-related, optimized spinning means to further work stations of the spinning machine that process the same yarn batch.

If necessary, several attempts are required to determine the optimized spinning parameters and / or spinning means until the recorded value of the at least one quality parameter corresponds to the desired value or until the optimal value of the at least one quality parameter under the given circumstances is reached. The work station is thus designed as a so-called pilot work station, at which the optimized spinning parameters and spinning means can be determined for a specific yarn section, since the yarn quality can be checked directly and with a high degree of accuracy due to the precision measuring head. If, for example, the optimized operating parameters, that is to say the spinning parameters and the spinning means, have been determined by means of a workstation control of the relevant workstation, then these can be transmitted either via a machine control or directly to other workstation controls. Alternatively, the optimized operating parameters can of course also be determined with the aid of a central control device of the spinning machine, for example a section control or a machine control, which then transmits the determined operating parameters directly to the other work stations. The other workplaces can then, for their part, if necessary after an operator has exchanged the existing spinning means for optimized spinning means, start production with the corresponding spinning parameters. The spinning parameters and spinning means optimized for this yarn section, more precisely the exact type of the optimized spinning means, can also be saved in order to be used later for settings at other work stations. It is therefore not necessary to equip all work stations with an expensive precision measuring head.

It is basically possible that the optimized spinning parameters and / or optimized spinning means are determined by an operator. In this case, the precision measuring head outputs the information about the recorded value of the at least one quality parameter, for example on a display, or displays it in some other way. This gives the operator immediate feedback and, based on his experience, can optimize the settings of the spinning parameters or change individual spinning devices. If the optimized settings of the spinning parameters or the optimized spinning means have then been found, these are registered by the control device and transferred to the other workplaces processing the same yarn batch. The optimized settings of the spinning parameters or the optimized spinning means can be input into the control device, for example, by the operator.

However, it is particularly advantageous if the control device and / or a further control device is designed to independently determine the lot-related, optimized spinning parameters and / or the lot-related, optimized spinning means as a function of the detected value of the at least one quality parameter. For this purpose, a program for determining the lot-related, optimized spinning parameters and / or the lot-related, optimized spinning means is stored in the control device and / or a further control device. Furthermore, the precision measuring head is connected to the control device and / or the further control device for this purpose. In the process, the program is activated when a new thread section is to be started.

According to a further alternative embodiment, the measured values of the quality parameter or parameters recorded by the precision measuring head can also be transmitted to an external evaluation unit. For this purpose, the external evaluation unit is at least connected to the precision measuring head. The optimized operating parameters are then determined in the external evaluation unit. For this purpose, a program for determining the lot-related, optimized spinning parameters and / or the lot-related, optimized spinning means is stored in this. The external evaluation unit is, for example, a central computer outside the machine. The external evaluation unit is preferably also connected to the control device and / or the further control device. The determined optimized operating parameters can then be set directly by the control device (s) also at the other work stations. The external evaluation unit enables the acquisition and evaluation of much larger amounts of data and thus a particularly precise determination of the optimized operating parameters and / or optimized spinning means.

In the method it is advantageous if the hairiness of the thread and / or the evenness of the thread are recorded as quality parameters. Both are characteristic values that are essential for the quality of a thread and can also be easily recorded using measurement technology.

If there are several different standards for one or more quality parameters, for example hairiness according to Uster or according to Zweigle, it is furthermore advantageous if this quality parameter is also output according to the several different standards. In the above-mentioned example of hairiness, two characteristic values are output for hairiness.

According to a further development of the method, it is advantageous if the at least one quality parameter is recorded by at least two different measuring methods. For example, the same quality parameter can be recorded both capacitively and optically. The effects of certain operating parameters and / or certain spinning means can hereby be recorded particularly well.

According to a first embodiment of the method, it is also advantageous if the spinning parameters and / or the spinning means are optimized in such a way that the thread has an optimal quality. For this purpose, the spinning parameters are changed and / or individual or all of the spinning means are exchanged for as long as the recorded values of the at least one quality parameter are further improved, possibly in an interactive process. As soon as further changes no longer lead to significant improvements in the recorded value, the quality-related, optimal spinning parameters and / or the optimal spinning means are found.

According to an alternative embodiment of the method, on the other hand, a limit value of the at least one quality parameter is specified, the recorded value of the at least one quality parameter is compared with the limit value, and the spinning parameters and / or the spinning means are optimized in such a way that, while adhering to the limit value, minimal energy consumption is achieved Job is reached. In other words, in this embodiment of the method, the aim is not to achieve maximum quality, but rather a yarn quality that is still perceived to be sufficient for the application in question. In this case, there is a weighted optimization based on good quality with minimal energy consumption.

In the case of the method, the measuring head can only be arranged temporarily at the at least one work station. For this purpose, the at least one work station has electrical and mechanical interfaces for temporarily accommodating the at least one sensor. This makes it possible to temporarily turn any job that has such interfaces into a pilot job. The precision measuring head can also be used one after the other at different workplaces and also on different machines.

However, it is also possible to provide each of the workstations of the spinning machine with electrical and mechanical interfaces for a precision measuring head. This means that any job can be operated temporarily as a pilot job. In this case, the program for determining the lot-related, optimized spinning parameters and / or the lot-related, optimized spinning means is preferably also stored at each work station, for example in each of the work station controls. However, it is also conceivable that the program is stored in a central control of the spinning machine, for example in a machine control, which in this case controls the organs of the work station accordingly and with which the precision measuring head is connected. It is also conceivable that the program is stored in an external evaluation unit which is connected at least to the precision measuring head in order to evaluate the recorded measurement data of the quality parameters and to determine the optimized operating parameters. The external evaluation unit is preferably also connected to the at least one control device, that is to say for example the machine control and / or the workstation control.

In the method, it is also advantageous if the optimized spinning parameters include a rotor speed and / or an air nozzle pressure and / or a yarn twist and / or a draft and / or a feed speed of the feed device.

Furthermore, it is advantageous if the optimized spinning means comprise a spinning rotor type and / or an air nozzle type and / or a draw-off nozzle type and / or a swirl element type and / or a fiber channel insert type.

In the method it is also advantageous if the lot-related, optimized spinning parameters and / or spinning means are stored in a memory, in particular in an article management database. The memory is preferably arranged in the spinning machine or at least assigned to the spinning machine, since this means that the spinning parameters and / or spinning means determined specifically for this spinning machine are assigned to it. The article management database could, however, also be provided in a central memory of a spinning mill. It is also advantageous if not only the optimized spinning parameters and / or spinning means, but also the measurement data of the precision measuring head on which these are based are also stored. It is thus also possible, once determined, spinning parameters and / or To check spin means again at a later date.

It is advantageous if, when the same cooking section is produced again, the optimized spinning parameters and / or spinning means stored in the memory are called up and transferred to the workstations of the spinning machine processing this yarn section. The spinning parameters and / or spinning means therefore do not have to be determined again when the same yarn batch is produced again. In addition, the stored spinning parameters and / or spinning means can also be used as a basic setting for new but similar yarn sections.

• 1 eine Übersichtsdarstellung einer Spinnmaschine in einer schematischen Vorderansicht,
• 2 eine Arbeitsstelle einer Spinnmaschine nach einer ersten Ausführung in einer schematischen, teilweise geschnittenen Seitenansicht,
• 3 eine abgebrochene, teilweise geschnittene Detailansicht einer Arbeitsstelle mit elektrischen und mechanischen Schnittstellen für einen Präzisionsmesskopf.

Further advantages of the invention are described in the following exemplary embodiments. They show, each schematically:

• 1 an overview of a spinning machine in a schematic front view,
• 2 a work station of a spinning machine according to a first embodiment in a schematic, partially sectioned side view,
• 3 a broken, partially cut detailed view of a job with electrical and mechanical interfaces for a precision measuring head.

In the following description of the exemplary embodiments, features that are identical or at least comparable in their design and / or mode of operation are provided with the same reference symbols. Furthermore, these are only explained in detail when they are mentioned for the first time, while in the following exemplary embodiments only the differences from the exemplary embodiments already described are discussed. Furthermore, for the sake of clarity, often only one or only a few of several identical components or features are labeled.

1 Figure 3 shows a front view of a spinning machine 1 in an overview. The spinning or winding machine 1 has a large number of workplaces arranged next to one another 2 on, on only one or on both opposite longitudinal sides of the spinning or winding machine 1 can be arranged. The jobs 2 are present between two frames 9 arranged, in which central components such as central drives or functions can be arranged. Only a machine control is present here 13th as a central control device 17th shown. The control device 17th is a memory 14th assigned.

Any of the jobs 2 has a spinning device in a manner known per se 3 on, which can be designed for example as a rotor spinning device or as an air spinning device. The spinning device 3 is by a feeding device 4th a fiber material 7th fed, which then in the spinning device 3 to a thread 5 is spun. The feeding device 4th comprises, for example, in the case of a rotor spinning machine, as shown here, an opening roller 22nd and a feed roller 23 . Is the spinning machine 1 designed as an air-jet spinning machine, the feed device 4th for example include a drafting system. The one from the spinner 3 produced thread 5 is made by means of a pull-off device 19th deducted and, depending on the design of the spinning machine 1 , possibly via several further components or handling elements of a winding device 28 fed where he is on a spool 6th is wound up.

According to the present representation, each of the jobs 2 as a control device 17th still a job control 12th which with the machine control 13th communicates. As an alternative to the embodiment shown, however, several workplaces can also be used 2 from a common control device 17th can be controlled. Furthermore, it is also possible that additional control devices 17th , for example at section level, are provided.

The individual jobs 2 the spinning or winding machine 1 are as so-called self-sufficient or at least partially self-sufficient jobs 2 educated. Such jobs 2 are at least able to automatically restart the production process after an interruption. The individual workplaces indicate this 2 an on-site piecing device (not shown).

Depending on the design of the spinning machine 1 it is still possible to use different lots of yarn 18th on a single spinning machine 1 to produce. The prerequisite for this is that at least some of the working bodies of the workplaces 2 the spinning machine 1 be driven either with individual drives per job or at least centrally in groups. The feed devices are, for example, the working organs 4th who have favourited Spinning Devices 3 who have favourited Trigger Devices 19th , to name the winding devices and possibly other working organs. For example, on a spinning machine 1 the working elements on both long sides are driven by central drives on each long side, so that on the two long sides of the spinning machine 1 two different lots of yarn 18th getting produced. On the other hand, as in 2 shown, at least for some of the working organs, individual drives 27 (please refer 2 ), a largely free assignment of the individual jobs is provided 2 to different Lots of yarn 18th possible. Present ( 1 ) are the jobs 2 the spinning machine 1 for example three different yarn lots 18th assigned.

For spinning the fiber material 7th to a thread 5 instructs the spinning device 3 one or more spin agents 8th on. There is only a single spin agent 8th per job 2 represented symbolically. On a rotor spinning machine like the one in the 2 shown comprise the spin means 8th for example a spinning rotor 21 , an exhaust nozzle 24 and / of a swirl element 25th as well as a fiber channel insert 26th , by means of which the from the feeding device 4th supplied fibers into the spinning rotor 21 can be directed. The spinning means can be on an air-jet spinning machine (not shown) 8th for example comprise an air nozzle and a spindle arranged in the air nozzle. These spin agents 8th are decisive for the yarn properties and thus for the quality of the spun thread 5 responsible and therefore usually exchangeable in or on the spinning device 3 arranged. Besides the execution of the spin means 8th however, also influence the attitudes of the working bodies at the workplace 2 such as, for example, the number of revolutions of the working organs, the quality of the thread 5 . Around a thread 5 In order to be able to produce in a desired quality, it is therefore necessary to have these so-called spinning parameters at the work stations 2 precisely set.

As in the following using the 2 will be explained, is at least one of the jobs 2 at least temporarily as a pilot job 11 educated. At these pilot workplaces 11 can determine the optimal spinning parameters and / or optimal spinning means for a specific yarn quality 8th are determined and then from these the other, the same yarn lot 18th producing jobs 2 to provide. The pilot job 11 has a precision measuring head for this purpose 10 which is explained in more detail below. In contrast, the other, not as pilot jobs 11 trained jobs 2 the spinning machine only with a thread monitor 20th or a simple measuring head.

There are three jobs here, for example 2 as pilot jobs 11 formed, each of the three yarn lots 18th one pilot job each 11 assigned. However, such an assignment is always a pilot job 11 with one thread each 18th by no means mandatory. Likewise, a lot of yarn 18th also several pilot jobs 11 be assigned; certain yarn sections can still be used 18th Also, no pilot workplaces at all can be assigned, but optimized spinning parameters and / or spinning means which have already been determined earlier can be used 8th be used.

2 shows a schematic, partially sectioned side view of a work station 2 a spinning machine 1 , which as a pilot job 11 is trained. The workplace 2 is designed, as described above, as a self-sufficient workstation in which the feeding device 4th who have favourited the spinning device 3 , the trigger 19th and the winder 28 or components of the same in each case by means of a single drive 27 are driven. The individual drives 27 are from the job control 12th controlled as symbolized by dotted lines. The precision measuring head 10 is also taxable with the job control 12th connected, which is indicated by another dotted line. As a spin agent 8th exhibits the present spinning device 3 a spinning rotor 21 , an exhaust nozzle 24 , a swirl element 25th as well as a fiber channel insert 26th on.

Since the present job 2 by means of the precision measuring head 10 as a pilot job 11 is designed, optimized spinning parameters and / or optimized spinning means can now be used 8th be determined. Production can start with certain basic settings, which are either entered by an operator or from a control device 17th can be accessed. Through the precision measuring head 10 it can then be determined immediately whether the quality corresponds to the desired requirements or whether spinning parameters and / or spinning means 8th need to be changed.

It is preferred to determine the optimized spinning parameters and / or spinning means 8th a corresponding program in the control device 17th , preferably in the workplace control 12th , deposited. However, the program can also be used in another control device 17th stored and only called up when required. The workplace 2 In this case, the optimized spinning parameters and / or spinning means can be determined 8th carry out largely independently. The control device 17th to this end, if necessary, also changes spinning parameters several times in succession, such as the speed of the spinning rotor, for example 21 , the speed of the puller 19th and the like until the quality of the thread 5 corresponds to the desired quality. The control device 17th continuously receives the from the precision measuring head 10 recorded values of the observed quality parameter or parameters.

If the best possible yarn quality is to be achieved, the optimized spinning parameters and / or spinning means are 8th found as soon as further changes in the spinning parameters and / or spin agents 8th no longer bring about any significant improvement in the quality parameters. But it is also possible in the control device 17th enter or store certain setpoint values or limit values for the quality parameter or parameters. The control device 17th in this case compare the one from the precision measuring head 10 transmitted, recorded values of the quality parameter or parameters and compares them with the target values or limit values. The optimized spinning parameters and / or spinning means 8th are found in this case when the setpoints are reached. It is also possible to carry out a weighted optimization, for example according to a minimum energy consumption. In this case the optimized spinning parameters and / or spinning means are 8th found when the limit value of the quality parameter is still adhered to and at the same time a minimum energy consumption is reached.

To the spin means 8th To optimize, it is possible after a first execution that the operator exchanges these based on his experience and the selected type of spinning device 8th into the control device 17th comes in. However, it is particularly advantageous if the program also includes the type of spin agent 8th so that the operator only has to use it. For example, the control device 17th show the operator on a display (not shown) which spinning agent 8th should be used. The operator must after inserting the spin agent 8th merely acknowledge this so that the control device knows which type of spinning means 8th is now used. It is of course also conceivable that the spinning means are provided with an identification that is provided by the control device 17th can be read.

Are in this way by means of the control device 17th , for example the job control 12th the pilot job 11 , optimized spinning parameters and / or optimized spinning means 8th determined, they can be from the control device 17th , here the job control 12th , for example directly to other workstation controls 12th further, not as pilot jobs 11 trained jobs 2 be transmitted. It is also possible that the optimized spinning parameters and / or optimized spinning means 8th first to the machine control 13th are transmitted and from this to the other workstation controls 12th . The machine control 13th stands for this with the workstation controls 12th in tax-related connection, as also symbolized by a dotted line. Alternatively, the optimized spinning parameters and / or optimized spinning means can be used 8th of course also initially in the control device 17th stored and later read out from this in order to then be used for other control devices 17th , in particular other workplace controls 12th to be made available.

The optimized spinning parameters and / or optimized spinning means 8th can now use the same yarn section on the others 18th processing, but not as pilot jobs 11 trained jobs 2 can be hired without having to do this at each individual job 2 a precision measuring head 10 would be required.

As in 3 shown, the precision measuring head 10 not necessarily permanent at the job 2 be arranged, but can also be provided only temporarily to a job 2 as a pilot job 11 to use. 3 shows a section of such a job 2 in a schematic detailed representation. To be used temporarily as a pilot job 11 to be able to act, this job shows 2 mechanical interfaces 16 as well as electrical interfaces 15th for holding the precision measuring head 10 on. The workplace 2 can thus be easily done by attaching the precision measuring head 10 to a pilot job 11 be rebuilt.

About the pilot functionality at the workplace 2 to enable is still in a control device 17th , for example in job control 12th , a corresponding program is stored with which the optimized spinning parameters and / or the optimized spinning means 8th can be determined. This then only has to be activated by an operator.

The present invention is not limited to the illustrated and described exemplary embodiments. Modifications within the scope of the claims are just as possible as any combination of the features described, even if they are shown and described in different parts of the description or the claims or in different exemplary embodiments, provided that there is no contradiction to the teaching of the independent claims.

List of reference symbols

1

Spinning machine

2

place of work

3

Spinning device

4th

Feeding device

5

thread

6th

Kitchen sink

7th

Fiber material

8th

Spin agent

9

frame

10

Precision measuring head

11

Pilot job

12th

Job control

13th

Machine control

14th

Storage

15th

electrical interface

16

mechanical interface

17th

Control device

18th

Yarn section

19th

Trigger device

20th

Thread monitor

21

Spinning rotor

22nd

Opening roller

23

Feed roller

24

Exhaust nozzle

25th

Swirl element

26th

Fiber channel insert

27

Single drives

28

Winding device

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed 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 2671832 B1 [0003]
• EP 2762617 A1 [0004]

Claims (15)

A method for operating a spinning machine (1), in particular an open-end spinning machine, with a large number of work stations (2) arranged next to one another, each of the work stations (2) having a feed device (4) for a fiber material (7), a spinning device (3) with spinning means ( 8) for spinning the fiber material (7) into a thread (5) and a pull-off device (19) for pulling off the thread (5), characterized in that a precision measuring head (10) for detecting a Quality of the thread (5) is arranged so that at the beginning of a new yarn section (18) at the at least one work station (2), lot-related, optimized spinning parameters and / or lot-related, optimized spinning means (8) are determined, whereby to determine the optimized spinning parameters and / or spinning means is detected by means of the precision measuring head (10) at least one quality parameter of the thread (5) and depending on a detected value of the at least one quality parameter, the spinning parameters of the spinning device (3) are set and / or the spinning means (8) are selected and inserted into the spinning device (3), and that the thus determined, optimized spinning parameters and / or optimized spinning means (8) by means of at least one Control device (17) can be transferred to further work stations (2) of the spinning machine (1) processing the same yarn section (18). Method according to the preceding claim, characterized in that a program for determining the lot-related, optimized spinning parameters and / or spinning means (8) is stored in the control device (17) and / or in a further control device (17) and / or in an external evaluation unit and that the program is activated when a new thread section (18) is to be started. Method according to one of the preceding claims, characterized in that the hairiness of the thread (5) and / or the evenness of the thread (5) are recorded as quality parameters. Method according to one of the preceding claims, characterized in that the at least one quality parameter is recorded by at least two different measuring methods. Method according to one of the preceding claims, characterized in that the spinning parameters and / or the spinning means are optimized in such a way that the thread (5) has an optimal quality. Method according to one of the preceding claims, characterized in that a limit value of the at least one quality parameter is specified, the recorded value of the at least one quality parameter is compared with the limit value, and the spinning parameters and / or the spinning means (8) are optimized in such a way that while adhering to of the limit value, a minimum energy consumption at the workplace (2) is achieved. Method according to one of the preceding claims, characterized in that the precision measuring head (10) is only temporarily arranged at the at least one work station (2). Method according to one of the preceding claims, characterized in that the optimized spinning parameters include a rotor speed and / or an air nozzle pressure and / or a yarn twist and / or a draft and / or a feed speed of the feed device (4). Method according to one of the preceding claims, characterized in that the optimized spinning means (8) comprise a spinning rotor type and / or an air nozzle type and / or a draw-off nozzle type and / or a swirl element type and / or a fiber channel type. Method according to one of the preceding claims, characterized in that the lot-related, optimized spinning parameters and / or spinning means (8) are stored in a memory (14), in particular in an article management database. Method according to one of the preceding claims, characterized in that when the same cooking section (18) is produced again, the optimized spinning parameters and / or spinning means (8) stored in the memory (14) are retrieved and sent to the work stations (2 ) the spinning machine (1). Spinning machine (1), in particular open-end spinning machine, with a plurality of work stations (2) arranged next to one another, each of the work stations (2) having a feed device (4) for a fiber material (7), a spinning device (3) with spinning means (8) for spinning the Fiber material (7) to form a thread (5) and a pull-off device (19) for pulling off the thread (5), and wherein at least one control device (17) is furthermore provided, characterized in that at least one of the work stations (2) a precision measuring head (10) for detecting a quality of the thread (5) is arranged, which detects at least one quality parameter of the thread (5) and the detected value of the at least one Outputs quality parameters and / or transmitted to the control device (17) and / or to an external evaluation unit (29), and that the control device (17) is designed to transfer optimized spinning parameters and / or optimized spinning means (8) to another, same yarn section (18 ) to transfer processing jobs (2) of the spinning machine (1). Spinning machine (1) according to the preceding claim, characterized in that a program for determining the lot-related, optimized spinning parameters and / or the part-related, optimized spinning means (8) is stored. Spinning machine (1) according to one of the preceding claims, characterized in that the at least one work station (2), preferably all work stations (2), has electrical (15) and mechanical (16) interfaces for temporarily receiving the precision measuring head (10). Spinning machine (1) according to one of the preceding claims, characterized in that the spinning machine (1) is assigned a memory (14), in particular an article management database, in which the lot-related, optimized spinning parameters and / or spinning means (8) can be stored.

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