DE202018103728U1 - Sewing machine for domestic use - Google Patents

Abstract

Sewing machine (1) for domestic use with a sewing mechanism for processing a sewing material (10) in dependence on at least one adjustable sewing parameter, characterized in that the sewing machine (1) comprises at least one sensor (2, 3) for detecting a process parameter and a Control device (9) is arranged so that the sewing parameter can be adjusted automatically depending on the process parameters.

Description

The invention relates to a sewing machine for domestic use with a sewing mechanism for processing a material in dependence on at least one adjustable Nähparameter.

Today's domestic sewing machines typically require specific user input for setting sewing parameters such as feed rate or stitch type. Therefore, especially for beginners the operation is difficult. Producing high quality seams with a sewing machine usually requires some user experience in sewing and sewing machines.

It is an object of the invention to provide a further developed sewing machine for domestic use.

To solve the problem is a sewing machine for domestic use according to the main claim. Advantageous embodiments will be apparent from the dependent claims.

To solve the problem, a sewing machine for home use with a sewing mechanism for processing a piece of fabric in response to at least one adjustable Nähparameter. The sewing machine comprises at least one sensor for detecting a process parameter. The sewing machine further comprises a control device, which is set up so that the sewing parameter can be automatically adjusted as a function of the process parameter. This will allow beginners to find a much easier access to sewing with good sewing results from the beginning. For experienced users, an increase in the achievable quality and reproducibility of the sewing results is possible. Furthermore, rejects can be reduced. Overall, the ease of use increases. User errors can be effectively counteracted. Occupational safety can also be increased in this way.

A processing of a piece of sewing material comprises a transporting, a cutting of the piece of sewing material and / or a sewing of the piece of sewing material.

When sewing a stitch is generally produced by means of at least one thread. A seam or hem includes multiple stitches. When sewing can be provided to simultaneously transport the fabric and / or cut. During a sewing process, it is also possible to provide transporting of the sewing material without simultaneous sewing, for example in order to introduce a stitch or a seam, ie a plurality of stitches, into the sewing material at offset positions.

A fabric is e.g. a textile fabric, a knitwear or a flat piece of leather, for example for clothing. A sewing process may generally be performed on only one piece or on two or more pieces for joining the pieces through a stitch or seam.

A sewing mechanism basically comprises a sewing mechanism and / or sewing tools, which can preferably be moved by a drive. The sewing mechanism is in particular configured to move the sewing tools and / or the sewing material relative to one another in such a way that the sewing material can be processed as planned.

A sewing machine for domestic use is not intended for industrial use. In particular, the sewing machine is a base sewing machine, that is, a sewing machine with a flat, in particular large-area fabric support. Basically, the fabric support is not flush with the ground. The surface can be a tabletop with the sewing machine on it.

An automated adaptation does not require any user intervention for the adjustment process itself. The automated adjustment is controlled by the controller to achieve a particular target or setpoint. The sewing process can thus be adapted without additional inputs by the user during the sewing process on the nature and / or contour of the currently processed material and corresponding changes during the sewing process. The number of necessary inputs of the user can thus be kept low. For example, it may be provided to be able to set a user experience level, e.g. Beginner Level or Advanced Level, and / or the selection of a processing goal. As a result, the automated adaptation can take into account the experience level of the user and implement a sewing process adapted to the user.

The adaptation of a sewing parameter as a function of a process parameter is implemented by the control device, in particular by means of a control process.

In a control process, also called rules, a control value of a so-called control variable is determined according to the deviation from the comparison of an actual value of a so-called controlled variable and the setpoint value of the controlled variable. The manipulated variable is to act on the system to be controlled so that the deviation between the actual value and the target value is minimized, that is zero as possible. This can always be a pursuit of the SollWerts implemented and counteract the influence of any interference.

In one embodiment, the controller comprises a processor and a memory having a computer program code, i.e., instructions storable on the memory. The processor, memory and computer program code are configured so that a multi-step process can be performed. By method steps, for example, a control, a machine learning algorithm and / or a control process can be realized.

In one embodiment, the sewing machine is set up in such a way that the automated adjustment of the sewing parameter can take place as a function of the process parameter during the process. Process accompanying means during the processing process. In-process is also called "in-process". A particularly high seam quality and virtually no or only slight deviations of an actual seam course from a desired seam course can thus be achieved, even under changing conditions and influences during the sewing process.

In one embodiment, the sewing parameter is a desired thread tension, in particular an upper thread and / or a lower thread. An insufficiently optimally adjusted thread tension leads to a too loose or too tight seam or to a rapid tearing of the thread. By automatically adjusting the target thread tension, a particularly high seam quality can be achieved and tearing of a thread counteracted, in particular if a process parameter is the actual thread tension or the feed rate (desired value or actual value) and / or the nature of the thread Material concerns, eg the thickness or density of the sewing material.

In one embodiment, the sewing parameter is a desired feed rate, ie the desired or predetermined feed rate. Feed speed means the relative speed with which the material to be sewn is moved by a feed dog of the sewing machine between a presser foot and a throat plate in the feed direction. Since the transporter normally temporarily hooks or seizes immovable to the sewing material for the purpose of advancing the material, the nominal feed rate usually corresponds to the actual feed rate. If the feed dog can not grasp the work as planned or the work piece expands or is compressed, the actual feed speed at the location of piercing the needle of the sewing machine may deviate from the target feed speed. In one embodiment, therefore, the actual feed rate can be used as a process parameter for adjusting the desired feed rate.

In particular, a pedal for operation by a foot or a hand of the user is provided, which is connected to the sewing machine and arranged so that the target feed speed is greater, the more the pedal is operated. In an embodiment in which such a pedal is provided, the automatic adjustment of the target feed rate serving as a sewing parameter results in the operating pressure being represented by the user as merely an input to the control device which, together with a process parameter, represents the desired value as a further input variable - Feed speed - in particular as a control variable - determined, which is then sought or realized by a corresponding control of the conveyor or a drive for the transporter. Non-optimal operation of the pedal by the user can still result in this way to a high seam quality.

In one embodiment, the control device is set up such that a control algorithm with preferably a plurality of process parameters is provided as input variables, which allows the setpoint to be adjusted individually for the respective user and / or adaptively to a position of the pedal which depends on the actuating pressure. Feed rate can be set. This prevents the user from producing unwanted errors in the seam due to excessive or uneven actuation of the pedal. In one embodiment, a setting option for different user groups may be selected by the user, e.g. Beginner, Advanced, Comfort, Low Power or High Power. In one embodiment, one or more user profiles are storable and selectable. In particular, a user profile can be generated by evaluating the actuation or the actuation pressure of the pedal with stored reference data and / or the current operator can be identified by means of comparison of stored user profiles, in particular with a user-specific characteristic curve. The corresponding user profile can then be selected automatically. In one embodiment, a child safety device is provided by means of a characteristic adjustment, which can detect the operation of the pedal by a child. If a child has been detected, the sewing machine can be switched off automatically or switch to a child mode in which, for example, only a slow sewing is possible or in which the range of functions is limited.

In one embodiment, the sewing parameter is a desired Nähfußdruck, ie the desired Nähfußdruck. Presser foot pressure refers to the pressure that is exerted on the sewing material by the sewing foot when the material is being moved by the feed dog. The presser foot presses the sewing material from above against the feed dog. By the automated adjustment of the desired Nähfußdrucks a particularly high seam quality can be achieved, especially if the process parameter relates to the nature of the material, for example, the thickness or density of the material.

In one embodiment, the sewing parameter is a stitch type and / or a desired length or a desired width of a stitch. By automatically adjusting the stitch type and / or a desired length or a desired width of a stitch, it is possible to select a stitch type suitable for the sewing material and / or a desired processing target, and to achieve particularly high seam quality and seam strength. The desired processing target can thus be achieved in a particularly reliable manner, in particular if the process parameter requires the contour and / or condition, e.g. Thickness or density of the sewing material.

In one embodiment, the process parameter is an actual thread tension, an actual feed rate and / or a thickness of the sewing material. An automated adjustment of at least one Nähparameters to achieve a particularly high seam quality can be implemented so particularly reliable.

In one embodiment, the process parameter is a density of the sewing material and / or a strength of the sewing material. The density and / or strength of the material to be sewn are in particular to be determined indirectly. The density can be determined by a weight sensor of known thickness and / or the strength of the piercing of the sewing needle. A particularly high seam quality and seam strength as well as a trouble-free sewing process are achieved in this way. A denser and / or stronger fabric requires e.g. a slower processing.

In an embodiment, the process parameter is a distance to an edge, a corner, a start, an end, or an edge course of the sewing material. A particularly precise seam course relative to a contour of the sewing material and / or the feed rate can be advantageously adapted, which will be discussed in more detail.

The distance is hereinafter referred to a reference point of the sewing machine, unless otherwise indicated. The distance is thus measured at a fixed reference point. The reference point is preferably the puncturing position of the sewing needle of the sewing machine.

In one embodiment, the process parameter is an actual seam course, a desired seam course projected onto the work piece and / or a seam course deviation. A seam deviation is the difference between the actual seam course and the desired seam course. The deviation of the course of the seam can be determined by detecting the actual seam course and a desired seam course projected onto the work piece. Alternatively or additionally, the seam deviation can be determined by balancing the detected actual seam course with a desired seam course stored in the control device. A particularly precise seam course can thus be obtained.

In one embodiment, the process parameter is a distance to an obstacle, for example a pin in the sewing material. In particular, there is an obstacle in the feed direction in front of the sewing needle and / or on a collision course with the desired seam course. A collision with an obstacle can thus be avoided and / or the feed rate can be adjusted, which will be discussed in more detail.

In one embodiment, the process parameter is a thread fill level. An unexpected reaching a thread end can be counteracted.

In one embodiment, the sensor is a force sensor, in particular on a deflection roller for thread supply. The thread tension can be detected very easily.

In one embodiment, the at least one sensor is a displacement sensor, an optical sensor, a triangulation sensor, a TOF sensor, a capacitive sensor and / or a light section sensor. The thickness of the sewing material, ie, for example, a substance or at least two superimposed substances, can thus be determined particularly reliably. In particular, the displacement sensor detects a position of the presser foot or an extension path of the presser foot, so that the thickness of the work piece can be determined together with the stored position of the throat plate on which the work piece rests. The path or the position are in this case measured in particular in the direction of movement of the sewing needle, that is approximately perpendicular to the throat plate or at a fixed or adjustable insertion angle to a perpendicular to the throat plate. In particular, the capacitive sensor allows the determination of the thickness of the sewing material on the basis of the distance between the presser foot and the throat plate on which the fabric rests.

In one embodiment, the at least one sensor is a current measuring sensor or a weight sensor. In particular, the current consumption at the drive motor for the sewing needle is measured by the current measuring sensor. The greater the strength of the material to be sewn, the higher the power consumption by the drive motor, that is, the power required to pierce the material with the sewing needle. The strength of the material can therefore be determined with the aid of the current measuring sensor. The weight sensor can be used to determine the density of the material together with the information on the thickness and dimension of the material above the weight sensor.

In one embodiment, the at least one sensor is a projection sensor or line projection sensor. A generated seam contour profile can thereby be optimized. By means of the projection sensor or line projection sensor, for example, a contour or line projected onto the sewing material can be detected. A comparison e.g. with an edge of the fabric allows creating a seam parallel to the edge.

In one embodiment, the at least one sensor is a camera sensor, e.g. CCD chip, optionally with image evaluation unit. An optical recognition of a seam end or a seam course and / or an edge, a corner, a start, an edge course or an end of the sewing material is thus made possible.

In one embodiment, the at least one sensor is a thread level detection sensor. In particular, the thread level detection sensor measures the level of the lower thread and / or upper thread. The sewing process can thus be adapted automatically to an approaching reaching of the thread end, e.g. the feed rate is reduced and the user is issued a corresponding note. In one embodiment, a Auffüllfaden is automatically arranged in such a way before the end of the thread involved in the sewing process that the sewing process is automated only briefly or not interrupted or must be interrupted by the user. Preferably, the thread level detection sensor is a rotary encoder. At a constant take-off speed, the faster-developing bobbin can thus be detected up to the maximum speed, which corresponds to an empty bobbin or the end of the thread. In one embodiment, the thread level detection sensor is a counting device which counts the revolutions of the bobbin during winding and unwinding. By comparing the revolutions with the stored number of revolutions for an empty bobbin or the end of the thread, the number of revolutions and / or the time until reaching the end of the thread or an empty bobbin can thus be predicted or determined particularly reliably.

In one embodiment, the sewing machine comprises at least one actuator for the automated adjustment of the sewing parameter. An actuator is a particularly electrically driven device for mechanically moving a component. In one embodiment, the actuator is a preferably electrical adjusting device for thread tension. The sewing parameter thread tension can thus be adapted particularly targeted automatically. In one embodiment, the actuator is a preferably electrical adjusting device for adjusting the Nähfußdrucks. The sewing parameter Nähfußdrucks can thus be particularly targeted automatically adjusted.

In particular, a preferably electric drive for the feed dog for automatically adjusting the feed rate and / or a further drive for the sewing needle for the passage of the sewing material at a fixed speed are provided.

In one embodiment, the sewing machine comprises at least one display device which, as a function of the process parameter, can display information to the user during the process. The user can be made aware of an approaching end of the thread or the sewing material or an approaching pin in the fabric. In one embodiment, the display device comprises a display, at least one lighting means and / or a vibration unit. In particular, the vibration unit acts on a pedal.

In one embodiment, the display device comprises a projection device, in particular a laser, for projecting a contour onto the sewing material. The user can thus be displayed the desired seam course. In particular, the contour projected onto the sewing material corresponds to the desired seam course. The desired seam course is preferably determined relative to an edge profile, an edge or corner, a beginning or end of the sewing material, so that the projected contour remains at the same location on the sewing material when the workpiece is being moved.

In one embodiment, the sewing machine has a touch screen display as a user interface. A particularly user-friendly and intuitive operation is thus made possible. Preferably, the display is the touch screen display, so that the display has a dual function. Preferably, the projected contour and / or graphically emphasized contours of the material are highlighted on the display. Deviations or recommended corrective measures to minimize a deviation of the actual seam course from the target The seam can be detected quickly and easily by the user.

In one embodiment, the controller is equipped with a machine learning algorithm. Preferably, the machine learning algorithm comprises a logic which is capable of evaluating the process parameters determined with the aid of the sensors for an optimal automated adaptation of the sewing parameters.

A machine learning algorithm generally assigns one or more input variables (process parameters), an output variable (sewing parameter). A machine learning algorithm is often the basis for so-called "artificial intelligence", whereby the machine learning algorithm "learns" from experience and independently "recognizes" patterns and laws in unknown data. A machine learning algorithm can be formed by a so-called "neural network" or comprise this in the form of a corresponding program. In particular, a machine learning algorithm is generated by a modeling phase and a subsequent identification phase in order finally to be able to output the most optimal sewing parameter in a prognosis phase. In particular, the modeling phase takes place at the manufacturer. The identification phase can be done by the manufacturer and / or the user. The prognosis phase then basically takes place with the user, ie the end user. For testing purposes, the forecasting phase can sometimes be carried out by the manufacturer.

In the modeling phase, a mathematical model, i. System of equations, created for the assignment of one or more input variables to an output variable, in particular by a mathematical equation system, preferably a dynamic model and / or differential equation system. The process parameters serve as input variable or input variables. One or more sewing parameters, together with a classification, e.g. poor, medium or optimal, of the result obtained with this as the output variable or output variables. In the modeling phase, these input variables and output variables are supplied to the machine learning algorithm for learning, so that the machine learning algorithm forms and / or adapts the mathematical equation systems accordingly.

In the identification phase, the machine learning algorithm is supplied with a plurality of value pairs each having an input variable and an output variable or having a plurality of input variables and an output variable. The machine learning algorithm is thus optimized and adapted to reality. In particular, an optimization of constants in a differential equation system of the machine learning algorithm takes place on the basis of the supplied value pairs. By providing a feedback device, the machine learning algorithm can also be supplied with an output variable by the end user. The machine learning algorithm can be further optimized in this way adapted to the user.

In the prediction phase, the machine learning algorithm is used to predict the most optimal sewing parameters based on the evaluated process parameters and to automatically optimize the sewing process during the process. In particular, an adjustment of the sewing parameters is performed, which is based on at least one preset lookup table, in particular with fixed parameter sets. Preferably, the Nähbildgüte is evaluated by the user by means of a feedback device. Alternatively or additionally, a classification of the sewing result by a manual or automated comparison with reference data or reference images done. The reference data or reference images may be stored in the control device and / or come from a common database of a cloud. In one embodiment, the sewing machine may receive data for the machine learning algorithm via a cloud. By using a cloud, the data of several users can be merged or an update by the manufacturer can be realized particularly easily. In one embodiment, the sewing machine has an Internet interface.

In one embodiment, the machine learning algorithm is set up so that the machine learning algorithm can assign various sewing situations and contours by means of an optical recognition, such as, for example, a seam beginning, a seam end or an edge, a corner or an edge course of the sewing material. In particular, the machine learning algorithm is used for the image evaluation unit.

In one embodiment, the controller is configured to provide user-specific sewing parameters. The sewing process can thereby be adapted to a specific user and optimized for this.

A further aspect of the invention relates to a method for carrying out a sewing process by means of a sewing machine for domestic use, in particular according to the aspect of the invention described in the introduction. In this method, the sewing machine outputs to the user a step-by-step instruction for performing the sewing process, in particular by means of the display device. Preferably, the control device of the sewing machine according to the above described aspect of the invention for implementing the method set up.

In one embodiment, the step-by-step instruction comprises at least two consecutive steps. The user can thus master a complex sewing task particularly easily.

In one embodiment, the issuance of a second step occurs only after a user confirmation to confirm the completion of the first step by the user. The user therefore has to confirm the completion of the first step before issuing the second step. The user can thus flexibly switch to the next step even if he does not want to perform the first step. In one embodiment, the issuance of a second step takes place automatically after a scheduled execution of the first step. The completion of the scheduled execution of the first step by the user is then detected. A reproducible and high-quality sewing result can thus be ensured.

In one embodiment, a visual check is made of the result of a step of detecting whether a step has been scheduled. Especially in the production of a sewing product, which includes, for example, steps such as placing, cutting and sewing, the scheduled completion of a step can be particularly easily and reliably carried out by means of optical control, e.g. using a camera sensor and / or an image evaluation unit.

Embodiments of the invention will be explained in more detail with reference to figures. Features of the embodiments and other alternative or additional embodiments described below may be combined individually or in a plurality with the claimed subject matter, unless otherwise specified. The claimed protection areas are not limited to the embodiments.

• 1: Schematische Darstellung einer Nähmaschine für den häuslichen Gebrauch;
• 2: Schematische Darstellung einer Anzeigeeinrichtung bei Detektion von Stecknadeln in Vorschubrichtung;
• 3: Schematische Darstellung einer Anzeigeeinrichtung bei Detektion einer Ecke des Nähguts in Vorschubrichtung;
• 4: Schematische Darstellung einer Anzeigeeinrichtung bei Detektion einer Kante des Nähguts in Vorschubrichtung.

Show it:

• 1 : Schematic representation of a sewing machine for domestic use;
• 2 : Schematic representation of a display device upon detection of pins in the feed direction;
• 3 : Schematic representation of a display device upon detection of a corner of the material in the feed direction;
• 4 : Schematic representation of a display device upon detection of an edge of the material in the feed direction.

The 1 shows a sewing machine 1 for domestic use with a sewing mechanism for processing a sewing material 10 depending on at least one adjustable sewing parameter. The sewing machine has a camera sensor 2 who prefers the upper arm 18 the sewing machine is attached. The camera sensor 2 This gives it a wide field of vision on the fabric 10 , during the sewing process over the forearm 19 is guided, the U-shaped with the upper arm 18 connected is. Forearm 19 includes a throat plate 20 with a recess that of the on the throat plate 20 lying fabric 10 partially covered. The upper arm 18 includes a movable and motorized driven needle bar 22 , on which a sewing needle 21 can be attached. While sewing can be done by oscillating the needle bar 22 along a stitch axis 23 the sewing needle 21 up and down through the fabric 10 be stung and pulled out again. The sewing needle 21 passes under the sewing material 10 in the recess of the throat plate 20 , A presser foot 23 presses the sewing material on the needle plate 20 , A feed dog in the forearm 19 , preferably integrated in the throat plate 20 , ensures that the sewing material is fed forward 10 under the presser foot 23 in the feed direction 24 , In particular, there is a front and rear feed dog, generally in front of and behind the presser foot 23 ,

A current sensor 3 is provided to the power consumption of a drive, not shown, for the needle bar 22 to eat. There may also be a displacement sensor on the presser foot 23 for detecting the distance of the presser foot 23 from the throat plate 20 be provided to determine the thickness of the fabric.

A projection device 6 , in particular diode laser, is used to project a contour 17 on the sewing material, which corresponds to a nominal seam course. The projected contour 17 can turn as well as an edge 11 , a corner 12 (please refer 2 . 3 . 4 ), a start 13 , an end 14 , a border 15 of the sewing material 10 or an actual seam course 16 from the camera sensor 2 detected and by an unrepresented image evaluation unit in the form of digital coordinates in the control device 9 be imaged. In one embodiment is on the display 4 the sewing process using a so-called virtual reality (VR) for the user shown. For example, the desired seam course and / or instructions or auxiliary contours can be superimposed on the camera image, so a video cross-fading can be realized. For deviations of the actual seam course 16 From the desired seam course, a display device can output a corresponding signal to the user, for example a vibration in the pedal 25 , on the display 4 and / or by means of the lighting means 5 , Especially with complex Seam curves with curves can thus be achieved particularly reliably a good sewing result.

The intended sensors are used to determine process parameters. Sewing parameter of the sewing machine 1 , which are decisive for the sewing process and the sewing result, are determined by means of the control device 9 adjusted automatically depending on the process parameters. In particular, defects and errors of the user when using the sewing machine 1 During the sewing process, the process automatically reduces, compensates or counteracts defects and errors. For example, a poor use by an excessively depressed pedal 25 be automatically corrected and so a poor sewing result due to a high feed rate automated by means of the controller 9 be avoided. A mistake of the user like eg a threatening collision with a pin 26 in the sewing material 10 (please refer 2 ) can by means of the control device 9 be automatically counteracted by, on the one hand reduces the feed speed automated and bulbs 5 on the sewing machine 1 make the user aware of an imminent collision, eg by changing the color of the at least one light source 5 from green to red.

In one embodiment, the control device comprises 9 a finger detection unit for detecting a finger in the puncture area. If during the sewing process a finger is detected in the puncture area, it may be provided, for example, that a control signal from the pedal 25 is not used to specify a desired feed rate, but the drive for the feed dog and / or the drive for the sewing needle 21 be stopped immediately.

The sewing machine 1 has an internet interface 7 , especially for data exchange with a cloud 8th or an external user device, eg PC, smartphone or tablet PC. Partial operation or setting and / or selection of a program can thus be done conveniently via the external user device. The sewing machine 1 also has a Bluetooth interface 27 for wireless connection of components such as the pedal 25 or accessories.

The sewing machine 1 has a touch screen display 4 and via a control knob 28 which allows rotation and / or depression to easily allow the user to interact with the sewing machine in addition to touchscreen inputs. For example, a sewing program can be selected via the touchscreen and / or feedback on a sewing result for a machine learning algorithm of the control device 9 can be given, allows pressing the control knob 28 eg a simple confirmation of the connection of a step in the context of a so-called "Guided Sewing" program (literally translated "guided sewing"), ie a step-by-step instruction for the user to carry out the sewing process. About the display 4 Both the Nähgutverarbeitungsbereich can be displayed enlarged, so also the steps of a "Guided Sewing" program optionally with graphical illustrations are issued to the user.

In the following, a guided sewing program and its procedure are presented by way of example. After the user through the touchscreen display 4 and / or by turning and pressing the operating head 28 the present Guided Sewing Program has been selected from several Guided Sewing programs, the first step for the processing of fabric on the display 4 displayed.

The first step may be to sew the fabric as shown on the display 4 illustrated and relative to the sewing machine 1 to position. For example, it can be stated to bring several substances into a predetermined shape, in particular with predetermined dimensions and, for example, by means of pins 21 to fix. After performing this step, the user can by pressing the user's head 28 go to the next step, which is a guide to selecting and preparing sewing needle 21 , Thread and presser foot 23 provides and optionally presets the presetting of Nähparametern. For example, the second step may end with automatic locking after the presser foot 23 on the sewing material 10 set and the completion of this second step by the user again by pressing the user's head 28 was confirmed.

During the third step, the desired seam pattern is projected on the fabric for the user and the user is now instructed to an edge 11 of the sewing material 10 to sew. During this step, the pins become 26 automatically detected and both before reaching a pin 26 as well as before reaching the edge 11 the feed rate is reduced automatically and the user is informed by means of display.

A next step may be, for example, the turning of the sewing material so that along another side of the sewing material 10 the sewing process can be continued. In subsequent steps, the actual seam course can be achieved in this way 16 be continued until the fabric is sewn finished. Finally, it can be provided that, when the end point of the desired seam course is reached, it is automatically locked by the actual seam course so that the resulting sewing result is no longer unnecessarily impaired by a user error.

In one embodiment, a separate desired seam course and / or a separate program can be entered by the user. The desired seam course can then be determined by the projected contour 17 on the sewing material 10 being represented.

In normal operation as well as in program mode can be provided that the user as based on the 2 to 4 described below can be supported automatically. Preferably, this can be locked by the user at the touch of a button and / or edges 11 are always automatically detected during sewing. If the user is on an edge 11 sews orthogonally, then slows down the feed rate automated. The feed rate is further reduced to zero when the sewing needle 21 the edge 11 reached or at a starting point for the desired seam along the edge reached 11 has arrived, so that the user the sewing material 10 can turn in peace. If sewing over the edge 11 is desired by the user, this may be done by the controller 9 be released by the user eg the pedal 25 operated in this stopped state. For pins 26 is preferably always stopped. On the basis of the detected process parameters, the control device 9 In addition, process-adjusting the sewing parameters automatically. In addition to the desired feed rate, these sewing parameters include in particular the desired thread tension, the desired sewing foot pressure and / or a desired length or a desired width of a stitch. In principle, provision may also be made to automatically set the stitch type as a function of the identified sewing properties.

In the 2 . 3 and 4 is illustrated as in exemplary embodiments using two bulbs 5 or two sets of bulbs 5 who prefers the upper arm 18 the sewing machine 1 are arranged, the user can be made aware of certain sewing situations to prevent sewing errors.

In particular, the two bulbs 5 or two sets of bulbs 5 be switched independently. Each of the two bulbs 5 or the bulbs 5 each of a set of bulbs 5 can in one embodiment on and off and / or in two different colors, preferably red and green, shine.

According to 2 The user starts sewing at the beginning 13 (please refer 1 ) of the sewing material, being pins 26 in the feed direction 24 are located. To the user on an approaching pin 26 to point out, all bulbs light up 5 or all sets of bulbs 5 up and / or red on. The user is warned in this way. At the same time, the control device reduces 9 automates the nominal feed rate, in particular taking into account the current specification of the pedal. Preferably, the sewing process is stopped shortly before an impending collision, if the user is not on his own by means of the pedal 25 the feed rate has timely reduced to zero. The user can then rest the pin 26 remove and continue the sewing process.

According to 3 the user sews on an inner corner 12 to. Again, an automatic braking can be provided. To the user on the corner 12 To point out, only one of the two bulbs lights 5 or only one of the two sets of bulbs 5 on. Alternatively or additionally, the two lamps or the two sets of lamps shine 5 in two different colors, preferably green to the side of the already sewn edge 11 and red to the side of the not yet sewn edge 11 , In particular, it is provided that the sewing needle 21 at a defined distance, preferably the seam allowance, to the corner 12 stop. The user can now press the foot 23 lift and the sewing material 10 rotate. With subsequent operation of the pedal 25 can then be sewn on normally.

According to 4 the user approaches the edge 11 at the end 14 of the sewing material 10 and / or the end of the desired seam course. Again, an automatic braking can be provided. To alert the user, all bulbs light up 5 or all sets of bulbs 5 up and / or red on. The user is warned in this way and prepared accordingly for the soon to reach the end of the desired seam course.

The needle remains at the end of the desired seam course, in particular at the distance of the seam allowance before the end 14 of the sewing material 10 stand. It follows a locking of the seam, for example by pressing the pedal again 15 , Furthermore, in one embodiment, an automated cutting of the thread, lifting the presser foot 23 and / or lifting the sewing needle 21 be provided.

In one embodiment, an automatic lane assistant is provided, which ensures that a desired seam course, at a constant distance, preferably in the scope of a provided seam allowance, to an edge 11 or a borderline 15 of the sewing material 10 is provided is maintained by the actual seam course, preferably almost independent of the leadership of the fabric 10 by the user.

In one embodiment, it is provided that an actual needle position for each stitch is adapted in a process-accompanying manner to a determined nominal needle position in an automated manner. An automated cleaning of an edge 11 or a borderline 15 of the sewing material 10 can thus be made possible with a particularly reproducible and high-quality sewing result. In particular, in this way, whole fabric panels can be serged particularly reliably and quickly. If in one embodiment, a zig-zag stitch is applied, the once in the fabric 10 and once outside just next to the edge 11 of the sewing material 10 takes place, these corresponding sewing parameters can be automated detected by the image evaluation unit and by the control unit 9 be set. In one embodiment, a blind stitch is automatically generated by automated image recognition and control of the sewing process. Hems can be particularly easy and fast without much effort for the user along the outer edges 11 of the sewing material.

Claims (15)

Sewing machine (1) for domestic use with a sewing mechanism for processing a sewing material (10) in dependence on at least one adjustable sewing parameter, characterized in that the sewing machine (1) comprises at least one sensor (2, 3) for detecting a process parameter and a Control device (9) is arranged so that the sewing parameter can be adjusted automatically depending on the process parameters. Sewing machine (1) after Claim 1 , characterized in that the sewing machine (1) is set up so that the automated adjustment of the sewing parameter depending on the process parameters can be carried out during the process. Sewing machine (1) according to one of the preceding claims, characterized in that the at least one sewing parameter is one of the following: a desired yarn tension, a desired feed rate, a desired Nähfußdruck, a stitch type and / or a desired length or a desired -Width of a stitch. Sewing machine (1) according to one of the preceding claims, characterized in that the at least one process parameter is one of the following: an actual thread tension, a thickness of the sewing material (10), a density of the sewing material (10), a strength, a distance to an edge (11), a corner (12), a beginning (13), an end (14) or edge course (15) of the sewing material, a distance to a seam end, an actual seam course (16), a seam course deviation, a Distance to an obstacle or thread fill level. Sewing machine (1) according to one of the preceding claims, characterized in that the at least one sensor is one of the following: a force sensor, a displacement sensor, an optical sensor, a triangulation sensor, a TOF sensor, a capacitive sensor, a light section sensor, a current measuring sensor (3), a weight sensor, a projection sensor or line projection sensor, a camera sensor (2) or a thread level detection sensor. Sewing machine (1) according to one of the preceding claims, characterized in that the sewing machine (1) comprises at least one actuator for the automated adjustment of the sewing parameter. Sewing machine (1) according to one of the preceding claims, characterized in that the sewing machine (1) comprises at least one display device (4, 5, 6), which can display information to the user as a function of the process parameters accompanying the process. Sewing machine (1) according to the preceding claim, characterized in that the display device comprises a display (4), at least one lighting means (5) and / or a vibration unit. Sewing machine (1) according to one of the two preceding claims, characterized in that the display device comprises a projection device (6), in particular laser, for projecting a contour (17) on the sewing material (10). Sewing machine (1) according to one of the preceding claims, characterized in that the sewing machine (1) has a touchscreen display as a user interface. Sewing machine (1) according to one of the preceding claims, characterized in that the control device (9) is equipped with a machine learning algorithm. Sewing machine (1) according to one of the preceding claims, characterized in that the sewing machine (1) has an Internet interface (7) and / or can receive data for the machine learning algorithm via a cloud (8). Sewing machine (1) according to one of the preceding claims, characterized in that user-specific sewing parameters can be provided. Sewing machine (1) according to any one of the preceding claims, characterized in that the control device (9) is arranged so that the sewing machine (1) outputs to the user a step-by-step instruction for performing the sewing process. Sewing machine (1) according to the preceding claim, characterized in that the step-by-step instruction comprises at least two successive steps and / or the issuance of a second step only after a user confirmation to confirm the conclusion of the first step by the user or automatically after a scheduled execution of the first step.

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