Bird nest prevention control method and sewing machine

Abstract

The invention discloses an anti-nest control method and a sewing machine, relates to the technical field of sewing equipment, and aims to solve the problem that a thread end is wrapped by subsequent stitches to form a nest during template machining. The anti-nest control method comprises the steps that after first-needle sewing is completed, a thread trimming assembly is controlled to execute a thread trimming action; the thread end control feeding assembly quickly moves for a preset distance, so that the thread end is separated from the needle plate hole; the feeding assembly is controlled to return to a preset sewing position, and next-needle sewing is carried out; by means of the arrangement, the problem of bird nest forming in the sewing process is thoroughly solved, the sewing quality, efficiency and stability are remarkably improved, and the equipment cost and the maintenance difficulty are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewing equipment, in particular to a bird nest prevention control method and a sewing machine. BACKGROUND

[0002] In the field of special-purpose sewing equipment, a template machine is a device widely used in garment processing. The device clamps the fabric in the middle of the template, drives the fabric to move using a feeding device, and cooperates with a thread picking and thread lifting device to realize the sewing of any two-dimensional stitch. However, in actual use, especially in the starting sewing stage, because the bottom thread head and the face thread head are wrapped by the subsequent stitch, a messy thread ball, so-called "bird nest", is often formed. This bird nest phenomenon not only affects the appearance quality of the garment, but also causes discomfort when wearing, thereby seriously affecting the overall quality of garment processing.

[0003] In order to solve this problem, the sewing machine industry has tried various technical solutions. One of the more common solutions is to use a double scissor form, which shortens the length of the thread head as much as possible by moving the thread cutting position close to the fabric. When the next stitch is formed, the bottom thread head and the face thread head are taken out of the needle plate hole. When the subsequent stitch is formed at the position of the needle plate hole, because the length of the thread head is less than or equal to the length of the stitch, the thread head can completely separate from the needle plate hole, thereby effectively preventing the formation of a bird nest. However, this double scissor solution has obvious limitations when used in a template machine. The needle plate of a template machine is usually provided with a 3-4mm thick protrusion to cooperate with the use of the template. In this case, even if a double scissor is used, the length of the face thread head can still reach or exceed 6mm. During the subsequent sewing process, because the length of the thread head is too long, it cannot completely separate from the needle plate hole, resulting in the subsequent stitch still wrapping the thread head in the fabric, thereby forming a messy bird nest.

[0004] Therefore, how to solve the problem of the thread head being wrapped by the subsequent stitch to form a bird nest in the template machine processing is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a bird nest prevention control method that can ensure that the thread head completely separates from the needle plate hole during the sewing process, thereby fundamentally solving the problem of the formation of a bird nest during the sewing process and significantly improving the sewing quality and efficiency.

[0006] Another purpose of the present application is to provide a sewing machine comprising the above-mentioned bird nest prevention control method, which fundamentally solves the problem of the formation of a bird nest during the sewing process, not only significantly improves the sewing quality and efficiency, but also reduces the equipment cost and operation difficulty.

[0007] In order to achieve the above-mentioned purposes, the present application provides the following technical solutions:

[0008] A bird nest prevention control method, comprising:

[0009] After the first needle sewing is completed, controlling the thread trimming assembly to perform a thread trimming action to form a thread end;

[0010] Controlling the feeding assembly to quickly move a preset distance to make the thread end disengage from the needle plate hole;

[0011] Controlling the feeding assembly to return to a preset sewing position for next needle sewing.

[0012] In some embodiments, after controlling the thread trimming assembly to perform the thread trimming action, the method further comprises:

[0013] Monitoring whether the thread trimming assembly completes the thread trimming action by the detecting assembly.

[0014] In some embodiments, the step of controlling the feeding assembly to quickly move a preset distance comprises:

[0015] Obtaining the length of the thread end;

[0016] Controlling the stepping motor of the feeding assembly to rotate forward to drive the template and the fabric to quickly move a distance L, wherein L is greater than the maximum length of the thread end.

[0017] In some embodiments, the process of obtaining the length of the thread end comprises:

[0018] Controlling the length of the thread end by the thread trimming assembly.

[0019] In some embodiments, before controlling the feeding assembly to return to the preset sewing position, the method further comprises:

[0020] Monitoring whether the thread end disengages from the needle plate hole by the photographing assembly.

[0021] In some embodiments, the process of controlling the feeding assembly to return to the preset sewing position comprises:

[0022] Controlling the stepping motor of the feeding assembly to rotate reverse to drive the template and the fabric to quickly move a distance L.

[0023] A bird nest prevention sewing machine, comprising:

[0024] A rack, a table plate is installed on the top of the rack;

[0025] A machine body, which is arranged on the table plate and one end of which is suspended above the table plate;

[0026] A feeding assembly, which is movably arranged on the table plate;

[0027] A thread trimming assembly, which is arranged on the rack and below the table plate;

[0028] The control system is in signal connection with the feeding assembly and the thread trimming assembly, and is used for realizing the anti-bird nest control method as any one of the above.

[0029] In some embodiments, the feeding assembly comprises a stepping motor and a fixing device, the stepping motor is used to drive the fixing device to reciprocate along the table plate, and the fixing device is used to fix the template clamping the fabric.

[0030] In some embodiments, the suspended end of the machine body is provided with a thread trimming assembly, the table plate is provided with a needle plate, the needle plate is located directly below the thread trimming assembly, and the thread trimming assembly is in signal connection with the control system.

[0031] In some embodiments, the method further comprises:

[0032] The detection assembly is used to monitor whether the thread trimming assembly completes the thread trimming action, and feeds back the monitoring result to the control system.

[0033] The photographing assembly is used to monitor whether the thread end is separated from the needle plate hole, and feeds back the monitoring result to the control system.

[0034] The anti-bird nest control method provided by the application comprises the following steps: after completing first needle sewing, controlling the thread trimming assembly to perform a thread trimming action to form a thread end; by triggering the thread trimming action immediately after completing the first needle sewing, the length of the thread end is controllable and closely connected with the sewing process, the interruption caused by improper thread trimming is reduced, and the sewing efficiency and continuity are improved; the feeding assembly is controlled to move empty for a preset distance, so that the thread end is separated from the needle plate hole; by moving the feeding assembly empty quickly, the thread end is completely separated from the needle plate hole, so that the thread end is prevented from being wrapped by subsequent stitches, the bird nest problem is fundamentally solved, after the thread end is separated from the needle plate hole, the thread end cannot be rolled into the needle plate hole when subsequent stitches are formed at the needle plate hole, so that sewing failures (such as thread skipping and thread breaking) caused by the thread end are avoided, and the stability of the sewing process is significantly improved. In addition, the preset distance of the empty movement can be adjusted according to the maximum length of the thread end, so that the thread end can be effectively prevented from being wrapped in various situations, and the adaptability and reliability of the method are enhanced; the feeding assembly is controlled to return to a preset sewing position for next needle sewing; by accurately controlling the feeding assembly to return to the preset sewing position, the accuracy of subsequent sewing and the continuity of the pattern are ensured.

[0035] The anti-bird nest control method arranged in the above manner not only completely solves the problem of bird nest formation in the sewing process, but also significantly improves the sewing quality, efficiency and stability, and reduces the equipment cost and maintenance difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on the provided drawings without creative labor.

[0037] Figure 1 The step diagram of the bird nest prevention control method provided by the present application;

[0038] Figure 2 The structural schematic diagram of the bird nest prevention sewing machine provided by the present application;

[0039] Figure 3 The Figure 2 The schematic diagram of the middle line head being separated from the needle plate hole.

[0040] Reference signs:

[0041] 1-Frame;

[0042] 2-Table plate;

[0043] 3-Body;

[0044] 4-Feeding assembly;

[0045] 5-Template;

[0046] 6-Stitching thread assembly;

[0047] 7-Needle plate. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0049] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0050] It should be noted that the orientation words such as "up", "down" and the like in the following text are based on the definitions of the drawings in the specification.

[0051] The core of the present application is to provide a bird nest prevention control method, which can ensure that the thread is completely separated from the needle plate hole during sewing, and avoid the thread being wrapped by the subsequent stitch, thereby fundamentally solving the problem of bird nest formation during sewing, and significantly improving the sewing quality and efficiency. Another core of the present application is to provide a sewing machine comprising the above-mentioned bird nest prevention control method, which fundamentally solves the problem of bird nest formation during sewing, not only significantly improves the sewing quality and efficiency, but also reduces the equipment cost and operation difficulty.

[0052] Please refer to Figure 1 A bird nest prevention control method comprises: after completing the first needle sewing, controlling the thread cutting assembly to perform a thread cutting action to form a thread; by triggering the thread cutting action immediately after completing the first needle sewing, the length of the thread is controllable and closely connected with the sewing process, reducing the interruption caused by improper thread cutting, and improving the sewing efficiency and continuity; controlling the feeding assembly 4 to move quickly for a preset distance, so that the thread is separated from the needle plate hole; by moving the feeding assembly 4 quickly, the thread is completely separated from the needle plate hole, thereby avoiding the thread being wrapped by the subsequent stitch, fundamentally solving the problem of bird nest, and after the thread is separated from the needle plate hole, the subsequent stitch cannot be rolled into the thread when it is formed at the needle plate hole, thereby avoiding the sewing failure (such as skipping line, broken thread, etc.) caused by the thread interference, and significantly improving the stability of the sewing process. In addition, the preset distance of the quick movement can be adjusted according to the maximum length of the thread, ensuring that the thread can be effectively avoided from being wrapped in various situations, and enhancing the adaptability and reliability of the method; controlling the feeding assembly 4 to return to the preset sewing position for the next needle sewing; by accurately controlling the feeding assembly 4 to return to the preset sewing position, the accuracy of the subsequent sewing and the continuity of the pattern are ensured.

[0053] The bird nest prevention control method set in the above-mentioned manner not only completely solves the problem of bird nest formation during sewing, but also significantly improves the sewing quality, efficiency and stability, and reduces the equipment cost and maintenance difficulty.

[0054] In the above-mentioned embodiment, after controlling the thread cutting assembly to perform the thread cutting action, it further comprises: monitoring whether the thread cutting assembly completes the thread cutting action by the detection assembly.

[0055] It should be noted that by accurately monitoring the cutting thread state, the accuracy of the cutting thread action is ensured, and the problem of thread entanglement, thread skipping and other problems that may occur in the subsequent sewing process is avoided, thereby further improving the sewing quality. Only after confirming that the cutting thread action is completed, the subsequent feeding assembly 4 action is triggered, avoiding the abnormal feeding caused by incomplete cutting thread, and improving the overall stability of the sewing process. The introduction of the detection assembly realizes the automatic monitoring and feedback of the cutting thread process, reduces the manual intervention, and improves the automation level and operation convenience of the equipment. Under different sewing speeds, fabric types or wire materials, the detection assembly can monitor the cutting thread state in real time, ensure the reliability of the cutting thread action, and enhance the adaptability of the equipment under complex working conditions.

[0056] In the above case, the step of controlling the feeding assembly 4 to move quickly by a preset distance includes: obtaining the length of the thread end; controlling the stepping motor of the feeding assembly 4 to rotate forward to drive the template 5 and the fabric to move quickly by a distance L, wherein L is greater than the maximum length of the thread end.

[0057] It can be understood that by obtaining the length of the thread end and controlling the feeding assembly 4 to move quickly by a distance L, the thread end is ensured to be completely separated from the needle hole, thereby avoiding the thread end being wrapped by the subsequent stitches, and fundamentally solving the problem of bird nest formation in the sewing process, and significantly improving the sewing quality. After the thread end is separated from the needle hole, the subsequent stitches cannot wrap the thread end when they are formed at the needle hole, avoiding sewing failures (such as thread skipping, thread breaking, etc.) caused by the thread end, and significantly improving the stability of the sewing process. By obtaining the length of the thread end in real time and dynamically adjusting the moving distance L, it is ensured that the thread end can be effectively avoided from being wrapped under various conditions, enhancing the adaptability and reliability of the method, especially suitable for complex working conditions under different fabrics and sewing conditions.

[0058] In practical applications, the length of the thread end after the cutting thread assembly performs the cutting thread action is generally within a certain range, and the moving distance L greater than the length range of the thread end is input in advance in the control system, so that in the sewing process, the thread end can be completely separated from the needle hole without real-time monitoring of the thread end length, simplifying the control process.

[0059] The method is realized only by control system optimization, without complex modification of the mechanical structure of the sewing machine, reducing the complexity and cost of the equipment, and reducing the maintenance difficulty and cost of the equipment. By accurately controlling the forward rotation of the stepping motor through the control system, the quick moving operation is realized, reducing the manual intervention, and improving the automation degree and operation convenience of the equipment. By effectively preventing the formation of bird nests, the rate of defective products caused by bird nests is reduced, and the qualified rate of products is improved, thereby bringing higher economic benefits to enterprises.

[0060] Further, the process of obtaining the length of the thread end includes: controlling the length of the thread end by the cutting thread assembly.

[0061] It should be noted that directly controlling the thread length by the thread cutting assembly can ensure that the thread length meets the preset requirements. After controlling the thread length, the subsequent sewing process is more stable, and the sewing failure caused by thread problems (such as wire jumping, wire breaking, etc.) is reduced, and the operation stability of the sewing equipment is improved.

[0062] In the above embodiment, before controlling the feeding assembly 4 to return to the preset sewing position, it further includes: monitoring whether the thread is separated from the needle plate hole through the photographing assembly.

[0063] It can be understood that real-time monitoring of the thread state by the photographing assembly can accurately determine whether the thread has completely separated from the needle plate hole, thereby avoiding subsequent sewing problems caused by incomplete separation of the thread, such as nest formation or the thread being re-wound into the needle hole. Only after confirming that the thread has completely separated from the needle plate hole, the feeding assembly 4 is allowed to return to the preset sewing position. This double verification mechanism significantly improves the reliability and stability of the sewing process, and reduces the sewing failure caused by thread problems.

[0064] On the basis of the above embodiment, the process of controlling the feeding assembly 4 to return to the preset sewing position includes: reversing the stepping motor of the feeding assembly 4 to drive the template 5 and the fabric to quickly move a distance L.

[0065] It should be noted that by accurately controlling the reversal of the stepping motor, it is ensured that the feeding assembly 4 can accurately return to the preset sewing position, thereby ensuring the accuracy of the subsequent sewing. This precise control reduces the sewing quality problems caused by position deviation, such as uneven stitches or inaccurate patterns. The quick movement operation reduces the sewing interruption time, making the sewing process more continuous, and significantly improving the overall sewing efficiency. Especially in batch production, this quick return mechanism can greatly shorten the production cycle and improve production efficiency. The precise control of the stepping motor ensures the stable operation of the feeding assembly 4, reduces the sewing failure caused by inaccurate mechanical movement, and can ensure the continuity and consistency of the sewing pattern. By directly controlling the reversal of the stepping motor through the control system, no additional mechanical devices or complex transmission mechanisms are needed, reducing the complexity and cost of the equipment. At the same time, it reduces the failure rate caused by complex mechanical structure, and improves the reliability of the equipment.

[0066] Please refer to Figure 2 and Figure 3 , a bird nest prevention sewing machine, comprising a rack 1, a machine body 3, a feeding assembly 4, a thread cutting assembly and a control system, a table plate 2 is installed on the top of the rack 1, the machine body 3 is arranged on the table plate 2 and one end is suspended above the table plate 2, the feeding assembly 4 is movably arranged on the table plate 2, the thread cutting assembly is arranged on the rack 1 and below the table plate 2, the control system is signal connected with the feeding assembly 4 and the thread cutting assembly, and is used for realizing the bird nest prevention control method as described above.

[0067] Understandably, the sewing machine's control system precisely coordinates the actions of the thread-cutting assembly and the feeding assembly 4, ensuring that the thread end completely leaves the needle eye during sewing. This fundamentally solves the problem of bird nest formation during sewing, significantly improving sewing quality. The sewing machine's control system can monitor the thread-cutting and feeding status in real time, ensuring accurate execution of each step, reducing sewing interruptions caused by mechanical or operational errors, and improving the stability of the sewing process. The sewing machine's control system automates actions such as thread cutting, feeding, and return, reducing manual intervention, increasing the automation level and ease of operation, and lowering the skill requirements for operators. Rapid idle movement and precise return to the preset sewing position reduce interruption time during sewing, improving overall sewing efficiency, especially in mass production, significantly shortening the production cycle. When implementing the anti-bird nest function, the sewing machine does not require complex modifications to the mechanical structure; it can be achieved solely through control system optimization, reducing equipment complexity and manufacturing costs, while also reducing maintenance difficulty and costs.

[0068] In a preferred embodiment, the feeding assembly 4 includes a stepper motor and a fixing device. The stepper motor is used to drive the fixing device to reciprocate along the platform 2, and the fixing device is used to fix the template 5 that clamps the fabric to ensure the stability of the template 5 during the feeding process, thereby ensuring the accuracy of the fabric movement.

[0069] It should be noted that the fixing device can firmly clamp the template 5 of the fabric, ensuring that the template 5 does not shift or shake during the feeding process, thereby ensuring that the fabric moves accurately along the preset path. The stable fixing of the template 5 and the precise movement of the fabric reduce the deviation of the stitches, ensuring the consistency and aesthetics of the sewing pattern, thus significantly improving the sewing quality.

[0070] In the above situation, the suspended end of the machine body 3 is provided with a material picking and taking component 6, and the platform 2 is provided with a needle plate 7. The needle plate 7 is located directly below the material picking and taking component 6, and the material picking and taking component 6 is connected to the control system signal.

[0071] Understandably, the precise alignment of the thread take-up assembly 6 and the needle plate 7 ensures that the needle's landing point is always in the preset position, avoiding sewing quality problems caused by positional deviations, such as uneven stitches or pattern misalignment. Real-time signal control of the thread take-up assembly 6 by the control system ensures consistency in every sewing action, maintaining high-quality sewing results even during long-term or mass production. The control system can dynamically adjust the operating parameters of the thread take-up assembly 6 according to different sewing tasks (such as different fabric types, stitch densities, or pattern complexity), enhancing the equipment's flexibility and adaptability to easily handle the sewing needs of complex patterns, multi-layered fabrics, or special processes, thus improving the equipment's versatility.

[0072] The protrusions on the needle plate 7 are designed with a specific shape that matches the way the fabric and template 5 are joined, thereby enhancing the blocking effect against thread returns to the needle plate hole. The control system is used to precisely coordinate the collaborative work of the thread take-up assembly 6, the feeding assembly 4, and the thread cutting assembly, including precise control of the working sequence of each assembly and parameter setting of the idle distance L of the feeding assembly 4.

[0073] In the above embodiments, a detection component and a camera component are also included. The detection component is used to monitor whether the wire cutting component has completed the wire cutting action, and the camera component is used to monitor whether the wire end has detached from the needle plate hole. The detection component and the camera component are used to feed the monitoring results back to the control system.

[0074] It should be noted that the detection component monitors whether the thread-cutting component has completed the thread-cutting action and feeds back the thread-cutting completion signal to the control system in real time. Upon receiving this signal, the control system quickly triggers the feeding component 4 to perform a rapid idle movement. This process ensures that after the thread-cutting action is completed, the feeding component 4 can respond promptly and execute the idle movement, avoiding feeding delays or abnormalities caused by incomplete thread cutting. Through this efficient signal feedback and collaborative control mechanism, not only is the automation level and reliability of the sewing process improved, but sewing efficiency is also significantly optimized, sewing defects caused by thread end problems are reduced, and sewing quality is further enhanced. The camera component monitors in real time whether the thread end has completely detached from the needle plate hole and generates a corresponding completion signal after confirming the detachment. This signal is promptly fed back to the control system so that the control system can accurately control the feeding component 4 to perform a rapid reset operation based on this signal. This process ensures that the thread end will not be re-entered into the needle plate hole by subsequent stitches during sewing, thus effectively avoiding sewing defects caused by thread end interference, such as the formation of bird nests. Through this intelligent monitoring and feedback mechanism, the sewing machine can accurately determine the state of the thread end after each thread cut and quickly resume sewing once the thread end is safely removed. This not only improves the automation and reliability of the sewing process but also significantly increases sewing efficiency, reduces the defect rate caused by thread end issues, and further optimizes sewing quality. Furthermore, this design enhances the equipment's adaptability to different sewing conditions, enabling it to operate stably under various complex working conditions and bringing higher production efficiency to enterprises.

[0075] During system initialization, the operator turns on the sewing machine. The control system automatically performs a comprehensive self-check of key components such as the machine body 3, frame 1, needle plate 7, feed assembly 4, thread take-up assembly 6, and thread trimming assembly to ensure all equipment is in normal working order. Simultaneously, the operator fixes the fabric to be processed onto the template 5 and installs the template 5 onto the fixing device of the feed assembly 4. By inputting a preset sewing pattern into the control system, the system automatically records the position information of each stitch in the pattern, preparing for subsequent sewing operations. Once the sewing process begins, the control system activates the thread take-up assembly 6 and the feed assembly 4. The feed assembly 4 moves the template 5 and the fabric, while the thread take-up assembly 6 performs the first stitch on the fabric according to the preset pattern, forming the initial stitch, thus enabling the sewing of any two-dimensional pattern on the fabric. After the thread take-up assembly 6 completes the first stitch, the control system immediately sends a thread trimming command to the thread trimming assembly, which performs the thread trimming action, forming thread ends M2 and D2. At this time, the lengths of both thread ends M2 and D2 are greater than the length of the next stitch. To prevent thread ends M2 and D2 from being sewn into the stitch during the next stitch, the control system monitors in real time whether the thread-cutting component has completed the thread-cutting action. Once the thread cutting is confirmed, the control system sends a rapid idle movement command to the feeding component 4, causing its stepper motor to rotate forward, rapidly moving the template 5 and fabric by a length L (L greater than the maximum length of M2 and D2), ensuring the thread ends are completely removed from the needle hole. After the rapid idle movement is complete, the control system monitors in real time whether the thread ends are completely removed from the needle hole. After confirming the thread ends are removed, the control system, based on the preset sewing pattern information, controls the stepper motor of the feeding component 4 to rotate in reverse, rapidly moving the template 5 and fabric back by a length L, quickly returning to the original predetermined sewing position. At this time, the thread take-up component 6 continues sewing the next stitch according to the pattern. Because the fabric is tightly bonded to the raised needle plate 7 of the template 5, thread ends M2 and D2 cannot return to the needle plate hole. Therefore, when the subsequent stitch is formed, the thread ends cannot be wrapped into the stitch, effectively achieving a "no-nest" function. The entire sewing process repeats the steps described above until the entire preset sewing pattern is completed. After sewing is finished, the control system automatically stops all components and issues an audible alert to remind the operator to remove the finished fabric.

[0076] In addition to the bird-nest prevention sewing machine disclosed in the above embodiments, the structure of other parts of the bird-nest prevention sewing machine can be referred to the prior art, and will not be described in detail here.

[0077] In summary, the bird nest prevention control method provided by this invention, by precisely controlling the action sequence and parameters of the thread cutting component and the feeding component 4, can ensure that the thread end completely detaches from the needle hole during the sewing process, avoiding the thread end being wrapped by subsequent stitches. This fundamentally solves the problem of bird nest formation during the sewing process, and also significantly improves sewing quality, efficiency, and the intelligence level of the equipment, while reducing equipment costs and operational difficulty, thus having significant economic and social benefits.

[0078] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0079] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0080] The foregoing has provided a detailed description of the bird nest control method and sewing machine provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of this invention.

Claims

1. A method of nest control, comprising: The method comprises the following steps: After the first needle sewing is completed, the thread cutting assembly is controlled to perform a thread cutting action to form a thread end; The feeding assembly (4) is controlled to move quickly by a preset distance to separate the thread end from the needle plate hole; The feeding assembly (4) is controlled to return to the preset sewing position for the next needle sewing.

2. The bird nest prevention control method according to claim 1, characterized by, After the thread cutting assembly is controlled to perform the thread cutting action, the method further comprises the following steps: The detection assembly is used to monitor whether the thread cutting assembly completes the thread cutting action and feed the monitoring result back to the control system.

3. The bird nest prevention control method according to claim 1, characterized by, The step of controlling the feeding assembly (4) to move quickly by a preset distance comprises the following steps: The length of the thread end is obtained; The stepping motor of the feeding assembly (4) is controlled to rotate forward to drive the template (5) and the fabric to move quickly by a distance L, wherein L is greater than the maximum length of the thread end.

4. The bird nest prevention control method according to claim 3, characterized by, The process of obtaining the length of the thread end comprises the following steps: The length of the thread end is controlled by the thread cutting assembly.

5. The bird nest prevention control method according to claim 1, characterized by, Before the feeding assembly (4) is controlled to return to the preset sewing position, the method further comprises the following steps: The photographing assembly is used to monitor whether the thread end is separated from the needle plate hole.

6. The bird nest prevention control method according to claim 3, characterized by, The process of controlling the feeding assembly (4) to return to the preset sewing position comprises the following steps: The stepping motor of the feeding assembly (4) is controlled to rotate reversely to drive the template (5) and the fabric to move quickly by a distance L.

7. A bird nest prevention sewing machine characterized by, The method comprises the following steps: A rack (1) is provided, and a table plate (2) is installed on the top of the rack (1); A machine body (3) is arranged on the table plate (2) and suspended above the table plate (2) at one end; A feeding assembly (4) is movably arranged on the table plate (2); A thread cutting assembly is arranged on the rack (1) and below the table plate (2); A control system is in signal connection with the feeding assembly (4) and the thread cutting assembly, and is used to realize the bird nest prevention control method according to any one of claims 1-6.

8. The anti-nest sewing machine of claim 7, wherein, The feeding assembly (4) comprises a stepping motor and a fixing device, the stepping motor is used to drive the fixing device to reciprocate along the table plate (2), and the fixing device is used to fix the template (5) clamping the fabric.

9. The anti-nest sewing machine of claim 8, wherein, The suspended end of the machine body (3) is provided with a fabric picking thread lifting assembly (6), the table plate (2) is provided with a needle plate (7), the needle plate (7) is located directly below the fabric picking thread lifting assembly (6), and the fabric picking thread lifting assembly (6) is in signal connection with the control system.

10. The anti-nest sewing machine of claim 9, wherein, The method further comprises the following steps: A detection assembly is used to monitor whether the thread cutting assembly completes the thread cutting action and feed the monitoring result back to the control system; A photographing assembly is used to monitor whether the thread end is separated from the needle plate hole and feed the monitoring result back to the control system.

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