Simple rope embroidery device rope feeding tension control method

Abstract

The application provides a simple rope embroidery device rope tension control method for improving the speed and accuracy of the simple rope embroidery device rope tension control. The simple rope embroidery device rope tension control method comprises the following steps: setting the initial position of the swing rod relative to the seat body; setting the tight line angle parameter and the swing amplitude parameter of the tension control module corresponding to different fabrics; calculating the included angle between the next needle position advancing direction relative to the current needle position and the current needle position advancing direction relative to the last needle position; if the included angle is less than a pre-set threshold, the rope feeding module executes the active mode of selecting the tight line operation and the line feeding operation according to the tension control module; if the included angle is greater than the pre-set threshold, the rope feeding module executes the follow-up mode of selecting the tight line operation and the line feeding operation according to the loop head. The application can quickly respond and timely adjust the rope feeding amount when the embroidery pattern changes greatly.

Description

Technical Field

[0001] This invention relates to a tension control method, specifically a simple rope embroidery device rope feeding tension control method, belonging to the field of embroidery machine technology. Background Technology

[0002] The simple rope embroidery device has a simple structure and enriches the types of embroidery, enabling rope embroidery and other operations on fabrics. During the rope feeding process, the tension of the rope needs to be adjusted and controlled. Existing technologies typically use a tension control module consisting of a base, a swing arm, and a torsion spring, in conjunction with a rope feeding motor. The swing arm is hinged to the base and can swing relative to it. One end of the torsion spring is fixed to the base, and the other end is connected to the hinged end of the swing arm, applying external force to the swing arm. The base also has a signal receiver, usually two Hall sensors, used to sense and receive signals from the swing arm to determine its position. The two Hall sensors correspond to the tight and loose rope tension positions, respectively. The tension is determined by the swing arm triggering the corresponding Hall sensor, and the rope feeding motor adjusts the feeding amount to regulate the rope tension. However, the positions of the two Hall sensors relative to the base are fixed, resulting in significant fluctuations in rope tension control and poor adaptability to applications requiring different tension adjustment ranges for different fabrics.

[0003] Chinese invention patent application No. 2022101071776 discloses a device and control method for taking in and releasing the embroidery cord. The signal receiver on the mounting plate has at least three receiving positions, namely the tight position, the loose position and the middle position, so as to control the tension of the embroidery cord within a predetermined range and improve the accuracy of tension control.

[0004] However, in actual embroidery, if the current arm position corresponding to the thread tension is near the tight thread position (requiring the thread to be tightened to increase thread tension), and the next embroidery pattern involves a sharp turn, the loop head of the simple rope embroidery device will rotate a large angle, instantly requiring a large supply of thread. Since the arm is already near the tight thread position, the thread feeding motor cannot instantly increase the thread supply to provide a large amount of thread in a short time, easily leading to excessive thread tension that tears and deforms the fabric. Similarly, if the current arm position is near the loose thread position (requiring thread feeding to reduce thread tension), and the next embroidery loop head rotates a large angle, a large amount of excess thread is instantly generated. The thread feeding motor cannot significantly reduce the thread supply in a short time, easily leading to excess thread accumulation, causing the embroidery needle to get stuck in the thread or the embroidery pattern to deform. Furthermore, the three receiving positions of the signal receiver are still fixed relative to the mounting plate position, therefore, it is still difficult to adapt to application scenarios that require different tension adjustment ranges for different fabrics. Furthermore, under the existing rope tension control method, when the simple rope embroidery device is turned on and reset, it is impossible to determine the reset direction of the loop head, that is, it is impossible to determine whether the loop head should be rotated clockwise or counterclockwise to reset. If the rotation direction is wrong, the rope thread may easily get wrapped around the loop head, resulting in abnormal embroidery or scrap. Summary of the Invention

[0005] Based on the above background, the purpose of this invention is to provide a simple rope embroidery device rope tension control method that improves the speed and accuracy of rope tension control, significantly reduces rope tension fluctuations, can quickly react and adjust the rope feeding amount when the embroidery pattern changes at a large angle, and is easy to adapt to application scenarios that require different tension adjustment ranges for different fabrics.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] A simple rope embroidery device rope feeding tension control method is disclosed for a simple rope embroidery device equipped with a tension control module, a rope feeding module, and a looper. The tension control module includes a base, a swing arm, a pin, a torsion spring, and a magnetic encoder. The swing arm is hinged to the base via the pin and can swing relative to the base. One end of the torsion spring is fixedly connected to the base, and the other end of the torsion spring is connected to the hinged end of the swing arm. The magnetic encoder includes a permanent magnet and a magnetic sensor. The permanent magnet is fixedly connected to the pin, and the magnetic sensor is positioned relative to the permanent magnet. The simple rope embroidery device rope feeding tension control method includes the following steps:

[0008] Set the initial position of the swing arm relative to the base;

[0009] For different fabrics, set the tension angle parameters and swing amplitude parameters of the tension control module;

[0010] Calculate the angle between the direction of the next stitch relative to the current stitch position and the direction of the current stitch relative to the previous stitch position during the embroidery process;

[0011] If the included angle is less than a preset threshold, the rope feeding module executes an active mode that selects between the tensioning operation and the rope feeding operation based on the tension control module.

[0012] If the included angle is greater than a preset threshold, the rope feeding module executes a follow-up mode that selects between the tensioning operation and the feeding operation based on the loop head;

[0013] Wherein, the initial position is the position where the torsion spring applies the minimum external force to the pendulum, the tension angle parameter is the first offset angle α of the pendulum relative to the initial position, and the swing amplitude parameter is the second offset angle β of the pendulum relative to the first offset angle position, where β>α.

[0014] This method uses a magnetic encoder to detect the swing angle of the pendulum relative to the base in real time. By comparing the current offset angle of the pendulum relative to its initial position with preset parameters, the current tension of the rope can be easily determined. The rope feeding module can then promptly perform tensioning or feeding operations, significantly reducing rope tension fluctuations. The preset parameters are offset angle values, which can be easily set and changed to quickly adapt to different fabrics requiring different tension adjustment ranges. Through analysis and calculation of the embroidery pattern, when a large angle change occurs in the next stitch, the rope feeding module switches from active mode to follow-up mode. In this mode, the rope feeding module and the looper move in the same direction, and the rope feeding module reacts quickly to adjust the amount of rope fed, ensuring normal tensioning and feeding operations.

[0015] Preferably, the active mode includes:

[0016] When the current offset angle c of the pendulum relative to the initial position is less than or equal to α, the rope feeding module performs a tightening operation to increase the rope tension. When the current offset angle c of the pendulum relative to the initial position is greater than or equal to α + β, the rope feeding module performs a feeding operation to decrease the rope tension.

[0017] Preferably, the active mode further includes:

[0018] When the rope feeding module performs the tensioning operation, if the current offset angle c of the swing arm relative to the initial position is greater than or equal to α + β / 2, the rope feeding module stops the tensioning operation.

[0019] Preferably, the active mode further includes:

[0020] When the rope feeding module performs the line feeding operation, if the current offset angle c of the swing arm relative to the initial position is less than or equal to α + β / 2, the rope feeding module stops the line feeding operation.

[0021] Preferably, the follow-up mode includes:

[0022] The rotation angle of the loop head during the embroidery process is calculated, and the amount of thread needed for the next stitch is calculated in combination with the diameter of the loop head. The thread feeding module selects between tightening and feeding operations based on the rotation direction of the loop head. When the loop head rotates, the thread feeding module performs tightening or feeding operations simultaneously.

[0023] Preferably, the initial position of the set rocker arm relative to the base includes:

[0024] Position the pendulum relative to the base so that the torsion spring applies the minimum external force to the pendulum. Set this as the initial position and set the angle of the pendulum relative to the base to 0°.

[0025] Preferably, the method for controlling the rope tension of this simple rope embroidery device further includes the following steps:

[0026] In response to a reset command, read the current position of the ring-ring head;

[0027] If the current position of the ring head is the origin position, the reset mode ends;

[0028] If the current position of the ring head is not the origin position, execute the reset mode.

[0029] Preferably, the reset mode includes:

[0030] The rope feeding module stops executing the active mode, controls the looping head to rotate clockwise for a set time, and reads the change in the offset angle of the swing arm relative to the initial position. If the offset angle increases, it controls the looping head to rotate counterclockwise until the looping head reaches the origin position and triggers the origin signal, stops the rotation of the looping head, and the rope feeding module resumes executing the active mode, ending the process.

[0031] The above-mentioned reset mode makes it easy to determine the rotation direction of the loop head when the simple rope embroidery device is reset, thus avoiding the rope from getting wrapped around the loop head.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] This invention provides a simple rope embroidery device with a rope tension control method. This method allows for easy determination of the current rope tension, enabling the rope feeding module to promptly perform tensioning or feeding operations, significantly reducing rope tension fluctuations. It also allows for easy pre-setting and modification of preset parameters for the tension control module, quickly adapting to different fabrics requiring varying tension adjustment ranges. Through analysis and calculation of the embroidery pattern, when a large angle change occurs in the next stitch, the rope feeding module switches from active mode to follow-up mode. In this mode, the rope feeding module and the looper move in the same direction, and the rope feeding module reacts quickly to adjust the rope feeding amount, ensuring normal tensioning and feeding operations. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the main structure of the tension control module in this invention;

[0036] Figure 2 This is a side view of the tension control module in this invention.

[0037] Figure 3 This is a flowchart illustrating the rope tension control method of a simple rope embroidery device according to the present invention.

[0038] Figure 4 This is a schematic diagram of the angle between the direction of advancement of the next needle position relative to the current needle position and the direction of advancement of the current needle position relative to the previous needle position in this invention;

[0039] Figure 5 This is a schematic diagram of the initial position, the first offset angle α, and the second offset angle β in this invention.

[0040] In the diagram: 1. Base; 2. Rocker arm; 3. Pin; 4. Torsion spring; 5. Permanent magnet; 6. Magnetic sensor. Detailed Implementation

[0041] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any modifications and / or alterations made to the present invention will fall within the protection scope of the present invention.

[0042] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the art. Unless otherwise specified, the methods in the following embodiments are conventional methods in the art. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0043] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following detailed description, many specific details are set forth to facilitate explanation and provide a full understanding of the embodiments of the present invention.

[0044] A simple rope embroidery device tension control method is provided for a simple rope embroidery device equipped with a tension control module, a rope feeding module, and a looper, such as... Figure 1 and Figure 2 As shown, the tension control module includes a base 1, a swing arm 2, a pin 3, a torsion spring 4, and a magnetic encoder. The swing arm 2 is hinged to the base 1 via the pin 3, allowing it to swing relative to the base 1. One end of the torsion spring 4 is fixedly connected to the base 1, and the other end is connected to the hinged end of the swing arm 2. The magnetic encoder includes a permanent magnet 5 and a magnetic sensor 6. The permanent magnet 5 is fixedly connected to the pin 3, and the magnetic sensor 6 is positioned relative to the permanent magnet 5. The rope feeding module and the looping head are existing technologies in the field and will not be described in detail here.

[0045] like Figure 3 As shown, the method for controlling the rope tension of this simple rope embroidery device includes the following steps:

[0046] Set the initial position of the swing arm 2 relative to the base 1;

[0047] For different fabrics, set the tension angle parameters and swing amplitude parameters of the tension control module;

[0048] Calculate the angle θ between the direction of the next stitch relative to the current stitch position and the direction of the current stitch relative to the previous stitch position during the embroidery process. The angle θ is specifically as follows: Figure 4 As shown;

[0049] If the included angle θ is less than the preset threshold, the rope feeding module will execute the active mode, which selects between the tensioning operation and the rope feeding operation based on the tension control module.

[0050] If the included angle θ is greater than the preset threshold, the rope feeding module will execute the follow-up mode that selects between the tensioning operation and the feeding operation based on the loop head.

[0051] The initial position is where the torsion spring 4 applies the minimum external force to the pendulum 2, such as... Figure 5 As shown, the tension angle parameter is the first offset angle α of the pendulum 2 relative to its initial position, and the swing amplitude parameter is the second offset angle β of the pendulum 2 relative to the first offset angle position, where β > α. The first offset angle α is generally set between 5° and 30°. Typically, when the fabric is thicker, a slightly larger angle value can be set. The smaller the second offset angle β is set, the more stable the controlled rope tension will be. When the fabric is thicker, a slightly larger angle value can be set.

[0052] The active mode includes: when the current offset angle c of the pendulum 2 relative to the initial position is less than or equal to α, the rope feeding module performs a tensioning operation to increase the rope tension; when the current offset angle c of the pendulum 2 relative to the initial position is greater than or equal to α + β, the rope feeding module performs a line feeding operation to decrease the rope tension; when the rope feeding module performs a tensioning operation, if the current offset angle c of the pendulum 2 relative to the initial position is greater than or equal to α + β / 2, the rope feeding module stops the tensioning operation; when the rope feeding module performs a line feeding operation, if the current offset angle c of the pendulum 2 relative to the initial position is less than or equal to α + β / 2, the rope feeding module stops the line feeding operation.

[0053] The follow-up mode includes: calculating the rotation angle of the next loop head during the embroidery process, calculating the amount of thread needed for the next stitch based on the diameter of the loop head, and the thread feeding module selecting the thread tightening operation and the thread feeding operation according to the rotation direction of the next loop head. When the loop head rotates, the thread feeding module performs the thread tightening operation or the thread feeding operation simultaneously.

[0054] Setting the initial position of the swing arm 2 relative to the seat 1 includes: positioning the swing arm 2 relative to the seat 1 at a position where the torsion spring 4 applies the minimum external force to the swing arm 2, setting this as the initial position, and setting the angle of the swing arm 2 relative to the seat 1 at this time to 0°.

[0055] In the existing technology, the rope tension control method cannot determine the reset direction of the loop head when the simple rope embroidery device is turned on and reset. That is, it cannot determine whether the loop head should be rotated clockwise or counterclockwise to reset. If the rotation direction is wrong, the rope thread may get wrapped around the loop head, resulting in abnormal embroidery or scrap.

[0056] To address the aforementioned issues, the simple rope embroidery device's rope tension control method further includes the following steps:

[0057] In response to a reset command, the current position of the ring head is read; if the current position of the ring head is the origin position, the reset mode ends; if the current position of the ring head is not the origin position, the reset mode is executed.

[0058] The reset mode includes: the rope feeding module stops executing the active mode, controls the ringing head to rotate clockwise for a set time, and reads the change in the offset angle of the swing arm 2 relative to the initial position. If the offset angle increases, the ringing head is controlled to rotate counterclockwise until the ringing head reaches the origin position and triggers the origin signal, stopping the rotation of the ringing head. The rope feeding module then resumes executing the active mode, and the process ends.

[0059] This method uses a magnetic encoder to detect the swing angle of the pendulum 2 relative to the base 1 in real time. By comparing the current offset angle of the pendulum 2 relative to its initial position with preset parameters, the current tension of the rope can be easily determined. The rope feeding module can then promptly perform tensioning or feeding operations, significantly reducing rope tension fluctuations. The preset parameters are offset angle values, which can be easily set and changed to quickly adapt to different fabrics requiring different tension adjustment ranges. Through analysis and calculation of the embroidery pattern, when a large angle change occurs in the next stitch, the rope feeding module switches from active mode to follow-up mode. In this mode, the rope feeding module and the looper head move in the same direction, and the rope feeding module reacts quickly to adjust the rope feeding amount, ensuring normal tensioning and feeding operations. Furthermore, the reset mode makes it easy to determine the rotation direction of the looper head when the simple rope embroidery device resets, preventing the rope from getting tangled on the looper head.

[0060] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A method for controlling the rope tension of a simple rope embroidery device, used in a simple rope embroidery device equipped with a tension control module, a rope feeding module, and a looper, characterized in that: The tension control module includes a base (1), a swing rod (2), a pin (3), a torsion spring (4), and a magnetic encoder. The swing rod (2) is hinged to the base (1) via the pin (3), and the swing rod (2) can swing relative to the base (1). One end of the torsion spring (4) is fixedly connected to the base (1), and the other end of the torsion spring (4) is connected to the hinge end of the swing rod (2). The magnetic encoder includes a permanent magnet (5) and a magnetic sensor (6). The permanent magnet (5) is fixedly connected to the pin (3), and the magnetic sensor (6) is positioned relative to the permanent magnet (5). The tension control method for the simple rope embroidery device includes the following steps: Set the initial position of the swing arm (2) relative to the seat (1); For different fabrics, set the tension angle parameters and swing amplitude parameters of the tension control module; Calculate the angle between the direction of the next stitch relative to the current stitch position and the direction of the current stitch relative to the previous stitch position during the embroidery process; If the included angle is less than a preset threshold, the rope feeding module executes an active mode that selects between the tensioning operation and the feeding operation based on the tension control module. If the included angle is greater than a preset threshold, the rope feeding module executes a follow-up mode that selects between the tensioning operation and the feeding operation based on the loop head; Wherein, the initial position is the position where the torsion spring (4) applies the minimum external force to the pendulum (2), the tension angle parameter is the first offset angle α of the pendulum (2) relative to the initial position, and the swing amplitude parameter is the second offset angle β of the pendulum (2) relative to the first offset angle position, where β>α.

2. The method for controlling the rope tension of a simple rope embroidery device according to claim 1, characterized in that: The active mode includes: When the current offset angle c of the swing arm (2) relative to the initial position is less than or equal to α, the rope feeding module performs a tightening operation to increase the rope tension. When the current offset angle c of the swing arm (2) relative to the initial position is greater than or equal to α + β, the rope feeding module performs a feeding operation to decrease the rope tension.

3. The method for controlling the rope tension of a simple rope embroidery device according to claim 2, characterized in that: The active mode also includes: When the rope feeding module performs the tensioning operation, if the current offset angle c of the swing arm (2) relative to the initial position is greater than or equal to α+β / 2, the rope feeding module stops the tensioning operation.

4. The method for controlling the rope tension of a simple rope embroidery device according to claim 2, characterized in that: The active mode also includes: When the rope feeding module performs the wire feeding operation, if the current offset angle c of the swing arm (2) relative to the initial position is less than or equal to α+β / 2, the rope feeding module stops the wire feeding operation.

5. The method for controlling the rope tension of a simple rope embroidery device according to claim 1, characterized in that: The follow-up mode includes: The rotation angle of the loop head during the embroidery process is calculated, and the amount of thread needed for the next stitch is calculated in combination with the diameter of the loop head. The thread feeding module selects between tightening and feeding operations based on the rotation direction of the loop head. When the loop head rotates, the thread feeding module performs tightening or feeding operations simultaneously.

6. The method for controlling the rope tension of a simple rope embroidery device according to claim 1, characterized in that: The initial position of the set rocker arm (2) relative to the seat (1) includes: Position the pendulum (2) relative to the base (1) such that the torsion spring (4) applies the minimum external force to the pendulum (2), set this as the initial position, and set the angle of the pendulum (2) relative to the base (1) to 0°.

7. The method for controlling the rope tension of a simple rope embroidery device according to claim 1, characterized in that: The method for controlling the rope tension of this simple rope embroidery device also includes the following steps: In response to a reset command, read the current position of the ring-ring head; If the current position of the ring head is the origin position, the reset mode ends; If the current position of the ring head is not the origin position, execute the reset mode.

8. The method for controlling the rope tension of a simple rope embroidery device according to claim 7, characterized in that: The reset modes include: The rope feeding module stops executing the active mode, controls the ringing head to rotate clockwise for a set time, and reads the change in the offset angle of the swing arm (2) relative to the initial position. If the offset angle increases, it controls the ringing head to rotate counterclockwise until the ringing head reaches the origin position and triggers the origin signal, stops the ringing head rotation, and the rope feeding module resumes executing the active mode and ends.

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