EP3296439A1 - Method and device for controlling and/or regulating a sewing machine, sewing machine and computer program product - Google Patents

Abstract

The present invention relates to a method for controlling and / or regulating a sewing machine (100), in particular an overlock sewing machine, for a sewing operation for the mechanical production of a seam (1) within a base material (2), comprising the steps of: detecting a sewing operation or an upcoming sewing operation of the sewing machine (100), setting an upper sewing speed limit (vmax) of the sewing machine (100), setting a lower sewing speed limit (vmin) of the sewing machine (100), and performing the sewing operation with a sewing speed between the lower sewing speed limit (vmin) and the upper sewing speed limit (vmax). The invention further relates to a device (10) for carrying out the method, a sewing machine (100) with the device (10) and a computer program product (70) for use in the device (10) or the sewing machine (100), which is to be carried out of the procedure is configured.

Description

The present invention relates to a method and a device for controlling and / or regulating a sewing machine, in particular an overlock sewing machine, for a sewing operation for the mechanical production of a seam within a base material. The invention further relates to a sewing machine and a computer program product configured for use in the sewing machine.

In the prior art, a so-called overlock sewing machine is known, through which in particular the edge of one or more fabrics can be sewn. A special feature of the overlock sewing machine is that the edge of the fabric or fabrics can be stapled, serged and trimmed at the same time. Overlock sewing machines are therefore often used to attach decorative stitching to garments or accessories. In particular, when overlocking, it is important that sewing personnel or a user of the sewing machine attaches the seam as evenly as possible to the fabric, so that the required aesthetic claim is met.

For inexperienced operators, it may happen that uneven operation of an overlock sewing machine, that a seam, as in Fig. 3a shown, relatively unevenly attached to the fabric or a base material. Even with complicated stitch patterns, it is increasingly the case that the seam is not attached as desired uniformly on the fabric. Here, not only the problem of lack of aesthetics, but also a problem of stitch quality occurs. If a sewing speed is chosen too high if the fabric is handled improperly, this can lead to a poor stitch quality with regard to the individual stitch or damage to the sewing machine and / or fabric.

To at least partially take this problem into account is in the US 5,762,011 A suggested to adjust the current sewing speed depending on a current stitch pattern. From the US 4,164,192 It can be seen that two different maximum sewing speeds can be set for better control of the sewing operation. Thus, for a skilled user of the sewing machine, for example, a higher maximum sewing speed than for an untrained user can be set. A satisfactorily uniform stitch pattern, as desired, in particular, during overlocking, however, can not be reliably achieved by these sewing machines or the corresponding method.

Object of the present invention is to at least partially overcome the disadvantages described above. In particular, it is the object of the present invention to provide an improved method and an improved device for controlling and / or regulating a sewing machine, in particular an overlock sewing machine, whereby the stitch quality and the uniformity of a stitch pattern can be improved.

The above object is solved by the claims. In particular, the above object is achieved by the method according to claim 1, the device according to claim 10, the sewing machine according to claim 18 and the computer program product according to claim 19. Further advantages of the invention will become apparent from the dependent claims, the description and the drawings. In this case, features and details that are described in connection with the method, of course, also in connection with the device according to the invention, the sewing machine, the computer program product and in each case vice versa, so with respect to the disclosure of the individual invention aspects always reciprocal reference is or may be ,

• Erkennen eines Nähbetriebs oder eines bevorstehenden Nähbetriebs der Nähmaschine,
• Einstellen einer oberen Nähgeschwindigkeitsgrenze der Nähmaschine,
• Einstellen einer unteren Nähgeschwindigkeitsgrenze der Nähmaschine, und
• Durchführen des Nähbetriebs mit einer Nähgeschwindigkeit zwischen der unteren Nähgeschwindigkeitsgrenze und der oberen Nähgeschwindigkeitsgrenze.

According to a first aspect of the present invention, a method for controlling and / or regulating a sewing machine, in particular an overlock sewing machine, for a sewing operation for mechanically producing a seam within a base material is provided. The method comprises the following steps:

• Recognition of a sewing operation or an imminent sewing operation of the sewing machine,
• Setting an upper sewing speed limit of the sewing machine,
• Setting a lower sewing speed limit of the sewing machine, and
• Perform the sewing operation at a sewing speed between the lower sewing speed limit and the upper sewing speed limit.

By setting the upper sewing speed limit as well as the lower sewing speed limit, a sewing speed band can be generated within which a user is exclusively or substantially exclusively allowed to perform a sewing operation with the sewing machine. Within this defined sewing speed range sewing can not be performed with too low a sewing speed or too high a sewing speed. This can prevent missed stitches and improve stitch quality during sewing. In addition, a particularly uniform stitch pattern can be generated within the sewing speed band, ie that stitches are not conspicuously further or narrower in the sewing operation. This makes it possible that even inexperienced users of a sewing machine, in particular an overlock sewing machine, can achieve a particularly uniform stitch pattern with high stitch quality.

The recognition of the upcoming sewing operation of the sewing machine can be understood to mean that, for example, switching on the sewing machine is detected and thereby the imminent sewing operation of the sewing machine. The recognition of the upcoming sewing operation of the sewing machine can also be understood to mean that a waking up of the sewing machine from a standby mode or the operation of a certain operating means of the sewing machine is detected and thereby an imminent sewing operation of the sewing machine is derived. During a sewing operation, it is not necessary to sew continuously. For example, a short sewing interruption during the sewing operation may be used to set the upper sewing speed limit and the lower sewing speed limit, and to perform the sewing operation at the sewing speed between the upper sewing speed limit and the lower sewing speed limit. That is, a sewing operation as such can be recognized even though no sewing operation is currently performed.

The method for controlling and / or regulating the sewing machine can also be understood as a method for performing a sewing operation with a sewing machine, in particular an overlock sewing machine.

By performing the sewing operation at a sewing speed between the lower sewing speed limit and the upper sewing speed limit, it is understood that the sewing operation is performed in compliance with the lower sewing speed limit and the upper sewing speed limit. That is, the sewing operation is performed such that the upper sewing speed limit is not exceeded and the lower sewing speed limit is not undershot. By performing the sewing operation, controlling and / or regulating the sewing machine to perform the sewing operation may be understood.

When setting the upper sewing speed limit, a corresponding limit value is preferably selected from a storage device, in particular, from a non-volatile memory of the sewing machine or outside the sewing machine, and set for the upper sewing speed limit. When setting the lower sewing speed limit, a corresponding limit value is preferably selected from a storage device, in particular, from a non-volatile memory of the sewing machine or outside the sewing machine, and set for the lower sewing speed limit.

According to one embodiment of the present invention, it is possible that at least one parameter of the seam to be produced, the base material to be used and / or the sewing machine used for the sewing operation is detected and set the upper sewing speed limit and the lower sewing speed limit automatically depending on the at least one detected parameter become. Thus, for example, a certain type of material such as cotton, silk or leather, or a fabric thickness can be recognized as a parameter of the base material and the sewing speed limits are adjusted accordingly. This saves time and thus money for sewing. The at least one parameter of the seam to be produced, the base material and / or the sewing machine used can be measured via a sensor device, in particular a sensor device of the sewing machine. As a result, the at least one parameter can be detected particularly quickly and without further work steps of a user of the sewing machine. Alternatively, it is conceivable that the at least one parameter of the seam to be produced, the base material and / or the sewing machine used is input manually via an input device, in particular an input device of the sewing machine. As a result, the at least one parameter can be input particularly accurately and correspondingly accurately recognized or used.

Further, in a method according to the invention, it is possible to detect a manual change of the upper sewing speed limit or a manual change of the lower sewing speed limit, and depending on the detected manual change of the upper sewing speed limit, the lower sewing speed limit is automatically changed or depending on the detected manual change the lower sewing speed limit is automatically changed the upper sewing speed limit. Accordingly, a user of the sewing machine only has to change the upper sewing speed limit or the lower sewing speed limit, and the other sewing speed limit is automatically changed. In the event that a user only wants to change a sewing speed band or the user should only be able to change the sewing speed band, the sewing machine can therefore be operated particularly simply, quickly and safely.

• wenn die untere Nähgeschwindigkeitsgrenze manuell um einen definierten Wert verringert wird, wird die obere Nähgeschwindigkeitsgrenze automatisch um denselben definierten Wert verringert,
• wenn die untere Nähgeschwindigkeitsgrenze manuell um einen definierten Wert erhöht wird, wird die obere Nähgeschwindigkeitsgrenze automatisch um denselben definierten Wert erhöht,
• wenn die obere Nähgeschwindigkeitsgrenze manuell um einen definierten Wert verringert wird, wird die untere Nähgeschwindigkeitsgrenze automatisch um denselben definierten Wert verringert, und/oder
• wenn die obere Nähgeschwindigkeitsgrenze manuell um einen definierten Wert erhöht wird, wird die untere Nähgeschwindigkeitsgrenze automatisch um denselben definierten Wert erhöht.

In addition, in the present invention, it is possible that, in one method, the lower sewing speed limit and the upper sewing speed limit are automatically changed as follows:

• if the lower sewing speed limit is manually reduced by a defined value, the upper sewing speed limit is automatically reduced by the same defined value,
• if the lower sewing speed limit is manually increased by a defined value, the upper sewing speed limit is automatically increased by the same defined value,
• if the upper sewing speed limit is manually reduced by a defined value, the lower sewing speed limit is automatically reduced by the same defined value, and / or
• If the upper sewing speed limit is manually increased by a defined value, the lower sewing speed limit is automatically increased by the same defined value.

As a result, it is possible for a sewing speed band formed between the upper sewing speed limit and the lower sewing speed limit to always be kept automatically equal to or equal to a manual change of the upper sewing speed limit or the lower sewing speed limit. An accidental adjustment of a preset Nähgeschwindigkeitsbandes can be prevented.

Moreover, in a method according to the invention, it may be advantageous if, during a manual change of the upper sewing speed limit, the lower sewing speed limit remains unchanged if the manual change of the upper sewing speed limit within a defined period of time, in particular within a period of less than 5 s, after a manual change Changing the lower sewing speed limit, or if the lower sewing speed limit is manually changed, the upper sewing speed limit remains unchanged when manually changing the lower sewing speed limit within a defined period of time, in particular within a period of less than 5 seconds, after a manual change of the upper sewing speed limit becomes. That is, the sewing speed band between the upper sewing speed limit and the lower sewing speed limit may manually change the upper sewing speed limit in a case where the lower sewing speed limit is manually changed shortly after the manual change of the upper sewing speed limit or shortly after the manual change of the lower sewing speed limit will be changed. So A user can override and change the basic specification of the sewing speed belt without interfering with the factory settings of the sewing machine. Thereby, greater flexibility in setting the sewing speed band and the upper and lower sewing speed limits can be generated. Here, successive manual changes of the upper sewing speed limit and the lower sewing speed limit in the same direction or in different directions are possible.

In addition, it may be advantageous if, in a method according to the invention, a duration of a sewing operation is detected which is performed after an automatic change of the upper sewing speed limit, with a subsequent manual change of the upper sewing speed limit, the lower sewing speed limit remains unchanged when the detected time duration of Sewing time is shorter than a defined period of time, in particular, shorter than 5 seconds, or a period of sewing operation is detected, which is performed after automatically changing the lower sewing speed limit, and in a subsequent manual change of the lower sewing speed limit, the upper sewing speed limit remains unchanged when the detected duration of the sewing operation is shorter than a defined period of time, in particular shorter than 5s, is. In practice, this means, for example, a manual change of the upper sewing speed limit and consequently an automatic change of the lower sewing speed limit and then a short sewing operation over, for example, less than 5, preferably less than 3 seconds. Now the user of the sewing machine realizes that he would rather sew with a larger sewing speed band, ie a larger distance between the upper sewing speed limit and the lower sewing speed limit. If he decides to lower the lower sewing speed limit even further down or This does not affect the upper sewing speed limit. Thereby, a particularly high flexibility in setting the sewing speed band or the upper and lower sewing speed limits can also be generated during a sewing operation and between two sewing operations of a sewing operation, respectively.

In a further embodiment of the present invention, it is conceivable that a defined sewing speed range is set, only in which the upper sewing speed limit and the lower sewing speed limit can be changed. That is, for example, when the sewing machine has a maximum sewing speed of 1500 stitches per minute (St / M), the defined sewing speed range is set in a range between 500 and 1000 St / M. In this range, a sewing speed band of, for example, 500 St / M can be freely shifted, but not beyond the limits of the defined sewing speed range. As a result, a certain security against an arbitrarily changeable sewing speed band can be created. In addition, it can be prevented that a machine, for example, is constantly operated at the maximum possible sewing speed. This can be beneficial to the longevity of the sewing machine.

Furthermore, in the case of a method according to the invention, it is possible to trigger an audible and / or visual warning signal if the upper sewing speed limit and / or the lower sewing speed limit exceed or fall short of a defined limit threshold value. For example, a defined sewing speed range can be set in which a sewing speed band can be changed without alarm. However, as soon as an upper or lower sewing speed limit of the defined sewing speed belt is exceeded or undershot, a warning signal is triggered. This may alert the user that he is now within a range of a sewing speed, in which he should not or should not sew. As a result, a possible damage or destruction of the sewing machine and / or the base material can be prevented.

In the context of the present invention, it is also possible for an audible and / or visual warning signal to be triggered if a difference value between the upper sewing speed limit and / or the lower sewing speed limit exceeds a defined difference threshold. Thereby, a user of the sewing machine can be made aware of it, if too large a sewing speed band is generated by changing the upper sewing speed limit and the lower sewing speed limit. Too high a sewing speed band could no longer reliably guarantee the uniform stitch pattern and / or stitch quality. In this case, it is also conceivable that a defined sewing speed range is set such that the defined difference threshold value can not be exceeded.

According to another aspect of the present invention, there is provided an apparatus for controlling and / or controlling a sewing machine, particularly an overlock sewing machine, for a sewing operation for mechanically forming a seam within a base material, the apparatus for performing a method as described in detail above is designed. Thus, a device according to the invention brings the same advantages as have been described in detail with reference to the method according to the invention. The device preferably has a recognition device for recognizing a sewing operation or an imminent sewing operation of the sewing machine. In addition, the apparatus has an adjusting device for setting the upper sewing speed limit of the sewing machine and setting the lower sewing speed limit of the sewing machine. The recognition device and the setting device can be used as Component of a control device of the sewing machine or designed and configured for the sewing machine. The controller may also be configured to perform the sewing operation at the sewing speed between the lower sewing speed limit and the upper sewing speed limit, as well as the other method steps discussed in detail above.

According to a further development of the device according to the invention, it is possible to manually adjust via the input device by a user of the sewing machine whether the manual change of the upper sewing speed limit the automatic change of the lower sewing speed limit or the manual change of the lower sewing speed limit the automatic change of the upper sewing speed limit entails or not. The input device is preferably arranged and configured directly on the sewing machine. The input device may be configured as a touch-sensitive display and / or as mechanical actuation elements. For example, for the above setting, the input device may display a check box depending on whether the manual change of the upper sewing speed limit, the automatic change of the lower sewing speed limit, or the manual change of the lower sewing speed limit results in the automatic change of the upper sewing speed limit should be selected or not. The setting via the check box can be done mechanically or capacitively depending on the design of the input device. Such settings on the sewing machine can be carried out in a particularly simple and user-friendly manner via such an input device. As an alternative to a check box, a slider can also be shown on the input device, via which the setting in question, for example, by moving the slider to the left or right, can be made.

Further, in an apparatus according to the present invention, it is possible that the apparatus is configured and configured such that the upper sewing speed limit remains unchanged when the lower sewing speed limit is manually increased, or the lower sewing speed limit remains unchanged when the upper sewing speed limit is manually decreased. That is, when a sewing speed band is reduced, a manual change of a sewing speed limit should not result in the automatic change of the other sewing speed limit. When the sewing speed is reduced, the stitch quality and stitch pattern tend to increase. The present configuration of the device thus allows the sewing speed band to be easily changed in certain advantageous cases. At the same time, however, it is preferable that the upper sewing speed limit be automatically increased as described above when the lower sewing speed limit is manually increased or the lower sewing speed limit is automatically decreased when the upper sewing speed limit is decreased as described above.

Another advantage of the present invention may be that the sewing machine has a storage device and various near-specific, base material-specific and / or sewing machine-specific upper sewing speed limits and lower sewing speed limits are stored in the storage device. These limits can be accessed directly after starting the sewing machine and the sewing machine can be set automatically and correspondingly fast with suitable basic limit values. If the base material, or the fabric or fabrics to be sewn are known, which is usually assumed, the sewing machine can be informed of the base material and the sewing machine can directly the base material specific top Set sewing speed limits and lower sewing speed limits. The storage device may comprise at least one volatile and / or non-volatile memory. Preferably, the memory device has both volatile and nonvolatile memory, wherein various near-specific, basic material-specific and / or sewing machine-specific upper sewing speed limits and lower sewing speed limits are stored as basic limit values in the non-volatile memory.

In addition, it may be advantageous according to the invention if different user-specific upper sewing speed limits and lower sewing speed limits are stored in the memory device. These values can also be accessed directly after starting the sewing machine and the sewing machine can be adjusted automatically and correspondingly quickly with suitable user-specific basic parameters. Thus, for example, prior to the start of the sewing operation, the level of experience of the user in the sewing machine, for example via the input device, can be entered and this can directly set the corresponding user-specific upper sewing speed limits and lower sewing speed limits.

In addition, of course, various combination sewing speed limits, such as a combination of user-specified upper sewing speed limits and lower sewing speed limits and base material-specific upper sewing speed limits and lower sewing speed limits, may also be stored in the memory device. Thus, for example, prior to the start of the sewing operation, the level of experience of the user and the base material used can be entered into the sewing machine, for example via the input device, and this can be described with reference to FIG Level of experience of the user as well as the base material used directly adjust the respective combination sewing speed limits.

According to a further embodiment of the present invention, it is possible for an upper sewing speed limit and / or lower sewing speed limit changed in the storage device to be storable, in particular manually storable, by actuating an input device of the device. Thus, favorites can be created during the sewing operation or after the sewing operation, which can be used again in a subsequent sewing operation, in particular if these favorites, as is preferably possible, are stored or storable in a non-volatile memory of the memory device. Furthermore, it is possible that automatically a defined number of the used or changed sewing speed limits are stored in the memory device as history or history. If the various values are stored in a non-volatile memory, for example, the sewing operation can be documented. The saving of the values in question in a volatile memory has the advantage that it is easy to fall back quickly to settings that are only short in time or corresponding upper sewing speed limits and lower sewing speed limits.

Moreover, in a device according to the invention it is possible for the changed upper sewing speed limits and / or the changed lower sewing speed limits in the storage device with respect to a specific seam, a specific base material and / or a specific sewing machine to be stored, in particular by actuating an input device of the device can be stored manually. Thus, during sewing or after sewing, favorites may be created with respect to a particular seam, a specific base material, and / or a particular sewing machine. On the favorites can be in a later Sewing operation are resorted to again, especially if these favorites, as is preferably possible, are stored in a non-volatile memory of the storage device or can be stored.

It may be of further advantage if the device has a reset function by which the stored changed upper sewing speed limit and / or lower sewing speed limit in the memory device can be deleted. If the device is used, for example, for a new sewing machine, or if the stitch pattern changes, stored values, which are of no significance for the upcoming sewing operations, can be deleted, thus creating storage space for new values in a quick and simple manner.

According to another aspect of the present invention, there is provided a sewing machine, in particular an overlock sewing machine, for mechanically forming a seam within a base material with a device as described in detail above. Thus, the sewing machine according to the invention brings the same advantages as have been described in detail with respect to the device according to the invention.

Moreover, a computer program product according to the invention is provided for use in a sewing machine and / or in a device as described in detail above, wherein the computer program product is configured such that when a seam is produced within a base material by the sewing machine, as described in detail above Procedure is performed. Thus, a computer program product according to the invention also brings the same advantages as have been described in detail with reference to the device according to the invention.

Further, the invention improving measures will become apparent from the following description of various embodiments of the Invention, which are shown schematically in the figures. All of the claims, the description or the drawings resulting features and / or advantages, including constructive details and spatial arrangements may be essential to the invention both in itself and in the various combinations.

Fig. 1

eine erfindungsgemäße Overlock-Nähmaschine,

Fig. 2

eine erfindungsgemäße Vorrichtung zum Steuern und/oder Regeln der Overlock-Nähmaschine

Fig. 3a

ein ungleichmäßiges Stichmuster,

Fig. 3b

ein gleichmäßiges Stichmuster,

Fig. 4

eine erfindungsgemäße Eingabevorrichtung in einem ersten Betriebszustand gemäß einer ersten Ausführungsform,

Fig. 5

eine erfindungsgemäße Eingabevorrichtung in einem zweiten Betriebszustand gemäß der ersten Ausführungsform,

Fig. 6

eine erfindungsgemäße Eingabevorrichtung in einem dritten Betriebszustand gemäß der ersten Ausführungsform,

Fig. 7

eine erfindungsgemäße Eingabevorrichtung in einem vierten Betriebszustand gemäß der ersten Ausführungsform,

Fig. 8

eine erfindungsgemäße Eingabevorrichtung in einem fünften Betriebszustand gemäß der ersten Ausführungsform,

Fig. 9

eine erfindungsgemäße Eingabevorrichtung gemäß einer zweiten Ausführungsform,

Fig. 10

eine erfindungsgemäße Eingabevorrichtung gemäß einer dritten Ausführungsform,

Fig. 11

Flussdiagramm zum Erläutern eines erfindungsgemäßen Verfahrens gemäß einer ersten Ausführungsform,

Fig. 12

Flussdiagramm zum Erläutern eines erfindungsgemäßen Verfahrens gemäß einer zweiten Ausführungsform,

Fig. 13

Flussdiagramm zum Erläutern eines erfindungsgemäßen Verfahrens gemäß einer dritten Ausführungsform,

Fig. 14

Flussdiagramm zum Erläutern eines erfindungsgemäßen Verfahrens gemäß einer vierten Ausführungsform, und

Fig. 15

Flussdiagramm zum Erläutern eines erfindungsgemäßen Verfahrens gemäß einer fünften Ausführungsform.

Each show schematically:

Fig. 1

an overlock sewing machine according to the invention,

Fig. 2

a device according to the invention for controlling and / or regulating the overlock sewing machine

Fig. 3a

an uneven stitch pattern,

Fig. 3b

a uniform stitch pattern,

Fig. 4

an input device according to the invention in a first operating state according to a first embodiment,

Fig. 5

an input device according to the invention in a second operating state according to the first embodiment,

Fig. 6

an input device according to the invention in a third operating state according to the first embodiment,

Fig. 7

an input device according to the invention in a fourth operating state according to the first embodiment,

Fig. 8

an input device according to the invention in a fifth operating state according to the first embodiment,

Fig. 9

an input device according to the invention according to a second embodiment,

Fig. 10

an input device according to the invention according to a third embodiment,

Fig. 11

Flowchart for explaining a method according to the invention according to a first embodiment,

Fig. 12

Flowchart for explaining a method according to the invention according to a second embodiment,

Fig. 13

Flowchart for explaining a method according to the invention according to a third embodiment,

Fig. 14

Flowchart for explaining a method according to the invention according to a fourth embodiment, and

Fig. 15

Flowchart for explaining a method according to the invention according to a fifth embodiment.

Elements with the same function and mode of action are in the FIGS. 1 to 15 each provided with the same reference numerals.

In Fig. 1 schematically a sewing machine 100 is shown in the form of an overlock sewing machine. The sewing machine 100 has a device 10 for controlling and / or regulating the sewing machine 100. The device 10 has an input device 20 in the form of a touch-sensitive display.

Fig. 2 11 shows a block diagram for explaining the device 10. The device 10 has, in addition to the input device 20, a nonvolatile memory 30, a volatile memory 40, a motor 50 for driving the sewing machine 100 and a motor control 60. The nonvolatile memory 30 stores a computer program product 70 according to the invention which can be executed by the motor control 60 for controlling and / or regulating the sewing machine 100. In addition, various near-specific, stock-specific, and / or sewing machine-specific upper sewing speed limits and lower sewing speed limits are stored in the non-volatile memory 30. In addition, various user-specific upper sewing speed limits and lower sewing speed limits are stored in the non-volatile memory 30.

Through the input device 20, various operating parameters such as an upper Nähgeschwindigkeitsgrenze v _max and a lower Nähgeschwindigkeitsgrenze v _min can be set. The engine controller 60 is used in particular for setting the desired sewing speed by an adjustment and an adjustment between a target sewing speed and an actual sewing speed. The actual sewing speed may be obtained by the engine controller 60 via devices and methods known in the art. The target sewing speed is obtained by the motor controller 60 by input of the user via the input device 20 or by reading the non-volatile memory 30 and / or the volatile memory 40.

The apparatus 10 further includes a reset function by which a stored, possibly changed, upper sewing speed limit and / or a lower, possibly changed, sewing speed limit in the non-volatile memory 30 and / or in the volatile memory 40 can be deleted.

In Fig. 3a a nonuniform stitch pattern or seam pattern N1 is shown on a base material 2. In the Fig. 3a shown seam 1 results from a sewing operation with widely differing sewing speeds.

In Fig. 3b a uniform stitch pattern or seam pattern N2 is shown on the base material 2. In the Fig. 3b seam 1 shown results from a sewing operation according to the invention, which was carried out with a sewing speed between an upper and a lower Nähgeschwindigkeitsgrenze v _max v Nähgeschwindigkeitsgrenze _min.

Fig. 4 shows an input device 20 with a display 21 for an upper Nähgeschwindigkeitsgrenze v _max, setting fields 22 for changing the upper Nähgeschwindigkeitsgrenze v _max, a display 23 for a lower Nähgeschwindigkeitsgrenze v _min, setting fields 24 for changing the lower Nähgeschwindigkeitsgrenze v _min, a slider 25 for varying the upper sewing speed limit v _max and a slider 26 for changing the lower sewing speed limit v _min . Fig. 4 shows an input device 20 on which, after turning on the sewing machine 100, basic settings are displayed. The basic settings are therefore an upper sewing speed limit v _max of 1000 St / M and a lower sewing speed limit v _min of 500 St / M.

Regarding Fig. 4 and Fig. 11 Next, a first embodiment of the present invention will be described. For this purpose, it is first recognized whether a sewing operation is present or should be performed. An imminent sewing operation is detected, for example, by detecting that the sewing machine 100 is switched on. Subsequently, the upper sewing speed limit v _max and the lower sewing speed limit v _min , as in Fig. 4 shown, set. Thereafter, a sewing operation is performed while maintaining the upper sewing speed limit v _max and the lower sewing speed limit v _min .

Regarding Fig. 4 . Fig. 5 and Fig. 12 Next, a second embodiment of the present invention will be described. For simplicity, a repetition of already described method steps is omitted. After detecting sewing, a stitch pattern is selected. Depending on the selected stitch pattern the upper Nähgeschwindigkeitsgrenze v _max at 1000 St / M and the lower Nähgeschwindigkeitsgrenze v _min to 500 St / M are now set. If a manual increase in the lower sewing speed limit v _min from 500 St / M to v _{min +} = 700 St / M is detected, then automatically, as in Fig. 5 also the upper sewing speed limit v _{max is} increased by 200 St / M, ie from 1000 St / M to v _{max +} = 1200 St / M. A sewing speed band between the new lower sewing speed limit v _{min +} and the new upper sewing speed limit v _{max +} thus remains equal to a value of 500 St / M. Subsequently, a sewing operation is performed in compliance with the new sewing speed limits v _{max +} , v _{min +} .

Hereinafter, with reference to Fig. 4 . Fig. 5, Fig. 6, Fig. 7 and Fig. 13 A third embodiment of the present invention is described. The first Five steps are first performed as described for the second embodiment. Now follows a step in which it is determined or recognized whether or not a sewing operation has been carried out since the automatic increase of the upper sewing speed limit v _max . If no sewing operation has been carried out and will, as in Fig. 7 shown, a manual increase of the upper sewing speed limit v _max of 1200 St / M directly, so for example within 5s, found to 1300 St / M, the lower sewing speed limit v _{min +} held and then between these limits, the sewing operation performed.

If, on the other hand, it is determined that a sewing operation has been carried out, a distinction is first made as to how long it was carried out. Here, a case distinction is made as to whether the sewing operation has lasted longer or shorter than 5s. If the sewing operation has lasted longer than 5s, it is assumed that a sewing operation has been completed and a new sewing operation is to start. Will be a manual increase of the upper Nähgeschwindigkeitsgrenze v _{max +,} as in Fig. 6 displayed, from 1200 to v _{max ++} = 1300 St / M, the lower sewing speed limit v _{min +} is automatically increased from 700 St / M to v _{min ++} = 800 St / M. Thereafter, a sewing operation is performed between the upper sewing speed limit v _{max ++} and the lower sewing speed limit v _{min ++} .

If the sewing operation was shorter than 5 seconds, it is assumed that the sewing operation has not yet been completed and the sewing speed band is to be adjusted. Will now be a manual increase of the upper sewing speed limit v _{max +} , as in Fig. 7 is detected from 1200 to v _{max ++} = 1300 St / M, the lower sewing speed limit v _{min + is} held and then a sewing operation is performed between the upper sewing speed limit v _{max ++} and the lower sewing speed limit v _{min +} .

Regarding Fig. 4 . Fig. 8 and Fig. 14 Next, a fourth embodiment of the present invention will be described. The first four steps of the fourth embodiment basically correspond again to the first four steps of the second and third embodiments. Subsequently, however, it is determined whether the sewing speed band becomes larger or smaller by changing the lower sewing speed limit v _min . In order to reduce the risk of a non-uniform stitch pattern, the sewing speed band according to this embodiment may not be larger. That is, it is now recognized that by decreasing the lower sewing speed limit v _min, the sewing speed band may become larger, the upper sewing speed limit v _{max is} automatically decreased by the lower sewing speed limit value v _min . Subsequently, a sewing operation with the same sewing speed band is performed. On the other hand, if it is determined that increasing the lower sewing speed limit v _{min will make} the sewing speed band smaller, as in FIG Fig. 8 shown holding the upper sewing speed limit v _max . Subsequently, a sewing operation is performed with a reduced sewing speed band.

After that it will be referred to Fig. 9 and Fig. 15 A fifth embodiment of the present invention is described in which it can be selected by a check box 27 whether or not a change of a sewing speed band should be allowed. Will, as in Fig. 9 If the field "YES" is selected or actuated, a change of the sewing speed band is not permissible. If a sewing speed limit is changed, the other sewing speed limit is forcibly changed. If, on the other hand, the field "NO" is selected or actuated (not shown), a change in the sewing speed band is permissible or possible in the context of the embodiments presented above.

Fig. 10 FIG. 12 shows another embodiment of the input device 20 in which a sewing speed belt 28 is graphically displayed on a touch-sensitive surface of the input device 20. In this case, a user with his finger 3 or other actuator can move the sewing speed belt 28 directly or the associated sewing speed limits within the scope of the above-described permissiveness. Once the sewing speed belt 28, or a sewing speed belt of the other embodiments has been adjusted, it may be stored via the input device 20 in the nonvolatile memory 30 or in the volatile memory 40, manually or automatically.

LIST OF REFERENCE NUMBERS

• 1 seam
• 2 basic material
• 3 fingers
• 10 device
• 20 input device
• 21 Upper sewing speed limit display
• 22 setting fields for changing the upper sewing speed limit
• 23 Lower sewing speed limit display
• 24 adjustment fields for changing the lower sewing speed limit
• 25 Slider for changing the upper sewing speed limit
• 26 Slider to change the lower sewing speed limit
• 27 check box
• 28 Sewing speed band for changing the lower and upper sewing speed limit
• 30 Non-volatile memory
• 40 volatile memory
• 50 engine
• 60 engine control
• 100 sewing machine
• vmax Upper sewing speed limit
• vmin Lower sewing speed limit
• MAX Maximum sewing speed of the sewing machine
• MIN Minimum sewing speed of the sewing machine

Claims (19)

Method for controlling and / or regulating a sewing machine (100), in particular an overlock sewing machine, for a sewing operation for the mechanical production of a seam (1) within a base material (2), comprising the steps: Detecting a sewing operation or an imminent sewing operation of the sewing machine (100), - setting an upper engraving specific Nähgeschwindigkeitsgrenze (v _max) of the sewing machine (100) Setting a lower stitch-specific sewing speed limit (v _min ) of the sewing machine (100), and - Perform sewing at a sewing speed between the lower stitch-specific sewing speed limit (v _min ) and the upper stitch-specific sewing speed limit (v _max ). Method according to claim 1,
characterized in that
at least one parameter of the seam (1) to be produced, the base material (2) to be used, the sewing machine (100) used for the sewing operation, and the upper stitch-specific sewing speed limit (v _max ) and the lower stitch-specific sewing speed limit (v _min ) are automatically determined depending on the at least one recognized parameter can be set. Method according to one of the preceding claims,
characterized in that
a manual change of the upper stitch-specific sewing speed limit (v _max ) or a manual change of the lower stitch-specific sewing speed limit (v _min ) is detected, and depending on the detected manual change of the upper stitch-specific sewing speed limit (v _max ) automatically the lower stitch-specific sewing speed limit (v _min ) is changed, or, depending on the detected manual change of the lower stitch-specific sewing speed limit (v _min ), the upper stitch-specific sewing speed limit (v _max ) is automatically changed. Method according to claim 3,
characterized in that
the lower stitch-specific sewing speed limit (v _min ) or the upper stitch-specific sewing speed limit (v _max ) are automatically changed as follows: if the lower stitch-specific sewing speed limit (v _min ) is manually reduced by a defined value, the upper stitch-specific sewing speed limit (v _max ) is automatically reduced by the same defined value, - when the lower engraving specifically Nähgeschwindigkeitsgrenze (v _min) is manually increased by a defined value, increasing the upper engraving specific Nähgeschwindigkeitsgrenze (v _max) automatically to the same defined value, if the upper stitch-specific sewing speed limit (v _max ) is manually reduced by a defined value, the lower stitch-specific sewing speed limit (v _min ) is automatically reduced by the same defined value, and / or - If the upper stitch-specific sewing speed limit (v _max ) is manually increased by a defined value, the lower stitch-specific sewing speed limit (v _min ) is automatically increased by the same defined value. Method according to one of claims 3 and 4,
characterized in that
with a manual change of the upper stitch-specific sewing speed limit (v _max ), the lower stitch-specific sewing speed limit (v _min ) remains unchanged if the manual change of the upper stitch-specific sewing speed limit (v _max ) within a defined period of time, in particular within a defined time period Duration of less than 5s, after a manual change of the lower stitch-specific sewing speed limit (v _min ), or when manually changing the lower stitch-specific sewing speed limit (v _min ), the upper stitch-specific sewing speed limit (v _max ) remains unchanged when the manual change of the lower specific engraving Nähgeschwindigkeitsgrenze (v _min) within a defined period of time, particularly within a time period of less than 5 seconds, after a manual change of the upper engraving specific Nähgeschwindigkeitsgrenze (v _max) is performed. Method according to one of claims 3 to 5,
characterized in that
a sewing time period is detected that is performed after automatically changing the upper stitch-specific sewing speed limit (v _max ), and then manually changing the upper stitch-specific sewing speed limit (v _max ), the lower stitch-specific sewing speed limit (v _min ) remains unchanged detected duration of the sewing operation is shorter than a defined period of time, in particular shorter than 5s, or a period of sewing operation is detected, which is performed after automatically changing the lower stitch-specific sewing speed limit (v _min ), wherein in a subsequent manual change of the lower stitch-specific Sewing speed limit (v _min ), the upper stitch-specific sewing speed limit (v _max ) remains unchanged if the detected sewing duration is shorter than a defined period of time, in particular shorter than 5 s. Method according to one of the preceding claims,
characterized in that
a defined sewing speed range is set only in which the upper stitch-specific sewing speed limit (v _max ) and the lower stitch-specific sewing speed limit (v _min ) can be changed. Method according to one of claims 3 to 7,
characterized in that
An audible and / or visual warning signal is triggered when the upper stitch-specific sewing speed limit (v _max ) and / or the lower stitch-specific sewing speed limit (v _min ) exceeds or falls below a defined threshold threshold. Method according to one of claims 5 to 8,
characterized in that
An audible and / or visual warning signal is triggered when a difference value between the upper stitch-specific sewing speed limit (v _max ) and / or the lower stitch-specific sewing speed limit (v _min ) exceeds a defined difference threshold. Apparatus (10) for controlling and / or regulating a sewing machine (100), in particular an overlock sewing machine, for a sewing operation for the mechanical production of a seam (1) within a base material (2), the apparatus for carrying out a method according to any one of preceding claims is configured. Device (10) according to claim 10 having an input device (20),
characterized in that
is manually adjustable via the input device (20) by a user of the sewing machine (100), whether the manual change of the upper stitch-specific sewing speed limit (v _max ) the automatic change of the lower stitch-specific sewing speed limit (v _min ) or the manual change of the lower stitch-specific sewing speed limit (v _min ) the automatic change of the upper stitch-specific sewing speed limit (v _max ) or not. Device (10) according to one of claims 10 to 11,
characterized in that
the apparatus (10) is configured and configured such that the upper stitch-specific sewing speed limit (v _max ) remains unchanged when the lower stitch-specific sewing speed limit (v _min ) is manually increased, or the lower stitch-specific sewing speed limit (v _min ) remains unchanged when the stitch-specific sewing speed limit (v _min ) upper engraving specific Nähgeschwindigkeitsgrenze (v _max) is manually reduced. Device (10) according to one of Claims 10 to 12, having a storage device (30, 40),
characterized in that
in the storage device (30, 40) different seam specific, base material-specific and / or sewing machine specific upper Nähgeschwindigkeitsgrenzen (v _max) and lower Nähgeschwindigkeitsgrenzen (v _min) is stored. Device (10) according to one of Claims 10 to 13, having a storage device (30, 40),
characterized in that
various user-specific upper sewing speed limits (v _max ) and lower sewing speed limits (v _min ) are stored in the memory device (30, 40). Device (10) according to one of Claims 10 to 14, having a storage device (30, 40),
characterized in that
a modified upper stitch-specific sewing speed limit (v _max ) and / or lower stitch-specific sewing speed limit (v _min ) in accordance with a method of claims 3 to 9 Memory device (30, 40) by operation of an input means of the device (10) storable, in particular manually storable, are. Device (10) according to one of claims 11 and 15,
characterized in that
the changed upper sewing speed limits (v _max ) and / or the changed lower stitch-specific sewing speed limits (v _min ) in the storage device (30, 40) with respect to a particular seam (1), a particular base material (2) and / or a particular sewing machine (100) by operation of an input means of the device (10) storable, in particular manually storable, are. Device (10) according to one of claims 15 to 16,
characterized in that
the device (10) has a reset function by which the stored changed upper stitch-specific sewing speed limit (v _max ) and / or lower stitch-specific sewing speed limit (v _min ) in the memory device (30, 40) can be deleted. Sewing machine (100), in particular overlock sewing machine, for the mechanical production of a seam (1) within a base material (2), comprising a device according to one of Claims 10 to 17. A computer program product (70) for use in a sewing machine (100) and / or in an apparatus according to any one of claims 10 to 17, configured such that when a seam (1) is produced within a base material (2) by the sewing machine (10). 100), a method according to any one of claims 1 to 9 is performed.

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