Color changing device for embroidery machine

Abstract

The utility model provides a color changing device for an embroidery machine in the technical field of embroidery machines. The color changing device comprises a position detection module, a driving module and a closed-loop motor, the position detection module comprises a first MCU, a first communication unit, a power failure holding unit, an absolute value magnetic encoder and a first power supply unit. The driving module comprises a second MCU, a second communication unit, a driving circuit, a needle position display unit and a second power supply unit; the first MCU, the first communication unit, the second communication unit and the second MCU are connected in sequence; the first MCU is connected with the power-down holding unit and the absolute value magnetic encoder; the power failure holding unit is connected with the absolute value magnetic encoder; the first power supply unit is connected with the first MCU, the first communication unit, the power failure holding unit and the absolute value magnetic encoder; the second MCU is connected with the driving circuit and the needle position display unit; and the driving circuit is connected with the closed-loop motor. The embroidery machine has the advantages that the structure is simplified, and the color changing precision of the embroidery machine is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, and in particular to a color-changing device for embroidery machines. Background Technology

[0002] Embroidery machines, also known as computerized embroidery machines, are the most advanced embroidery machinery of our time. They enable traditional hand embroidery to be done at high speed and efficiency, and can also achieve the requirements of "multi-layer, multi-functional, uniform and perfect" that hand embroidery cannot reach. They are electromechanical products that embody a variety of high-tech features.

[0003] During operation, embroidery machines require a color-changing device to replace the thread of different colors (by changing the needles that thread the different colors) to produce colorful embroidery works. Traditional color-changing devices use an open-loop motor to drive the needles to the working position, and then a Hall sensor to detect the needles. This method has the following drawbacks: 1. Embroidery machines have several needles, and each needle needs to be paired with a Hall sensor, requiring a mechanical transmission structure, resulting in a complex and bulky color-changing device; 2. Hall sensors can only simply detect the presence or absence of needles, generating a 1 or 0 level signal, resulting in poor detection accuracy and frequent instances of incomplete color changing; 3. The open-loop motor cannot provide feedback adjustment, which may cause deviations in the needle's movement position, thus affecting the accuracy of color changing.

[0004] Therefore, how to provide a color-changing device for embroidery machines that simplifies the structure and improves the color-changing accuracy of embroidery machines has become an urgent technical problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a color-changing device for embroidery machines, which simplifies the structure and improves the color-changing accuracy of embroidery machines.

[0006] This utility model is implemented as follows: a color-changing device for an embroidery machine, comprising a position detection module, a drive module, and a closed-loop motor for driving the color needle module to change colors;

[0007] The position detection module includes a first MCU, a first communication unit, a power-down retention unit, an absolute magnetic encoder for detecting the position of the color needle, and a first power supply unit.

[0008] The driving module includes a second MCU, a second communication unit, a driving circuit, a pin position display unit, and a second power supply unit;

[0009] The first MCU, the first communication unit, the second communication unit, and the second MCU are connected in sequence; the first MCU is connected to the power-down retention unit and the absolute magnetic encoder respectively; the power-down retention unit is connected to the absolute magnetic encoder; the output terminal of the first power supply unit is connected to the first MCU, the first communication unit, the power-down retention unit, and the absolute magnetic encoder respectively.

[0010] The second MCU is connected to the driving circuit and the needle position display unit respectively; the output terminal of the second power supply unit is connected to the second MCU, the second communication unit, the driving circuit and the needle position display unit respectively; the output terminal of the driving circuit is connected to the closed-loop motor.

[0011] Furthermore, both the first power supply unit and the second power supply unit include a power chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, and an inductor L1.

[0012] One end of resistor R2 is connected to resistor R1 and pin FB of power chip U1, and the other end is connected to pin GND of power chip U1 and grounded; one end of capacitor C1 is connected to pin BST of power chip U1, and the other end is connected to one end of inductor L1 and pin SW of power chip U1; one end of capacitor C2 is connected to the other end of inductor L1, and the other end is grounded; one end of resistor R3 is connected to resistor R4 and pin EN of power chip U1, and the other end is connected to pin IN of power chip U1.

[0013] The other end of the inductor L1 is connected to the first MCU, the first communication unit, the power-down retention unit, and the absolute magnetic encoder, or to the second MCU, the second communication unit, the drive circuit, and the pin position display unit.

[0014] Furthermore, the power-down retention unit includes an energy storage subunit and a non-volatile memory;

[0015] The energy storage subunit is connected to the non-volatile memory, the first power supply unit, and the absolute magnetic encoder, respectively; the non-volatile memory is connected to the first MCU.

[0016] Furthermore, the energy storage sub-unit is a battery or a supercapacitor.

[0017] Furthermore, both the first communication unit and the second communication unit are RS485 communication units.

[0018] Furthermore, the pin position display unit is a digital tube display screen.

[0019] The advantages of this utility model are:

[0020] 1. By setting up a position detection module including an absolute magnetic encoder, a drive module, and a closed-loop motor for driving the color needle module to change colors, the position detection module, drive module, and closed-loop motor are connected in sequence. The absolute magnetic encoder is used to detect the position of the color needle; that is, the absolute magnetic encoder replaces the traditional Hall sensor. Since the absolute magnetic encoder is a non-contact sensor, it not only eliminates the mechanical transmission structure and avoids failures caused by long-term wear, but also detects based on changes in the magnetic field, converting the magnetic field changes into measurable electrical signals, and thus obtaining the required position information. It can detect the position of multiple color needles simultaneously (there is no limit to the number of needle positions detected), eliminating the need to set up a separate sensor for each color needle, and the detection accuracy is much higher than that of traditional Hall sensors. By replacing the traditional open-loop motor with a closed-loop motor, the displacement accuracy of the color needle module is effectively improved, the movement deviation of the color needle is reduced, and the structure of the color changing device is simplified, which greatly improves the color changing accuracy of the embroidery machine.

[0021] 2. By setting up a position detection module and a drive module, that is, by adopting a separate drive method, the signal detection (color needle position detection) and the power part (closed-loop motor control) are completely separated, which enables the drive circuit to match greater power requirements, and the absolute magnetic encoder is not easily interfered with during the detection process, effectively improving the versatility and reliability of the color changing device. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a circuit diagram of a color-changing device for an embroidery machine according to the present invention.

[0024] Figure 2 This is a circuit block diagram of the power-off retention unit of this utility model.

[0025] Figure 3 This is a circuit diagram of the first power supply unit and the second power supply unit of this utility model.

[0026] Figure 4 This is a circuit diagram of the first communication unit and the second communication unit of this utility model.

[0027] Figure 5 This is the circuit diagram of the absolute magnetic encoder of this utility model.

[0028] Figure 6 This is the circuit diagram of the pin position display unit of this utility model. Detailed Implementation

[0029] This utility model provides a color-changing device for embroidery machines, solving the technical problems of existing color-changing devices that use open-loop motors to drive the needles to the working position and then use Hall sensors to sense the needles. Each needle needs to be paired with a Hall sensor, resulting in a complex structure, bulky size, poor detection accuracy of the Hall sensors, and the inability of the open-loop motor to provide feedback adjustment, which may lead to deviations in the movement position of the needles. This invention simplifies the structure and greatly improves the color-changing accuracy of embroidery machines.

[0030] The technical solution in this utility model embodiment is to solve the above problems. The overall idea is as follows: replace the traditional Hall sensor with an absolute magnetic encoder to simplify the structure and improve the detection accuracy; replace the traditional open-loop motor with a closed-loop motor to improve the displacement accuracy of the color needle module, thereby simplifying the structure of the color changing device and improving the color changing accuracy of the embroidery machine.

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] Please refer to Figures 1 to 6 As shown, a preferred embodiment of the color-changing device for an embroidery machine according to the present invention includes a position detection module, a drive module, and a closed-loop motor for driving the color needle module to change colors; the position detection module is used to detect the position of each color needle in the color needle module; the color needle module is provided with a plurality of color needles; the drive module is used to drive the closed-loop motor to work; the closed-loop motor can be a stepper motor or a brushless motor;

[0033] The position detection module includes a first MCU, a first communication unit, a power-down retention unit, an absolute magnetic encoder for detecting the position of the color needle, and a first power supply unit. The first MCU controls the operation of the position detection module. In specific implementations, any MCU capable of performing this function can be selected from existing technologies; the specific model is not limited, such as STMicroelectronics' STM32F103 series MCUs. The control program is well-known to those skilled in the art and can be obtained without creative effort. The first communication unit communicates with the drive module; the power-down retention unit… The unit is used to record position information to prevent the embroidery machine from losing position information after a power outage. Because the closed-loop motor can rotate multiple times in actual operation, the absolute magnetic encoder cannot record multiple rotations. The power-off retention unit records the number of rotations of the closed-loop motor after a power outage, thus restoring the required absolute position + number of rotations information after power is restored. The absolute magnetic encoder is non-contact and separate, with no limitation on the number of needle positions detected, and has higher detection accuracy than Hall effect sensors. Models available include SD2313, MT6701, or KTM5900. The first power supply unit is used to power the position detection module.

[0034] The drive module includes a second MCU, a second communication unit, a drive circuit, a pin position display unit, and a second power supply unit. The second MCU controls the operation of the drive module. In specific implementations, any MCU capable of this function can be selected from existing technologies; the specific model is not limited to any particular type, such as STMicroelectronics' STM32F103 series MCU. The control program is well-known to those skilled in the art and can be obtained without creative effort. The second communication unit communicates with the position detection module. The drive circuit drives the closed-loop motor. In specific implementations, any drive circuit capable of this function can be selected from existing technologies; the specific model is not limited to any particular type, such as the TB67H451AFNG drive circuit. The pin position display unit displays the pin number of the currently working color pin. The second power supply unit supplies power to the drive module.

[0035] The first MCU, the first communication unit, the second communication unit, and the second MCU are connected in sequence; the first MCU is connected to the power-down retention unit and the absolute magnetic encoder respectively; the power-down retention unit is connected to the absolute magnetic encoder; the output terminal of the first power supply unit is connected to the first MCU, the first communication unit, the power-down retention unit, and the absolute magnetic encoder respectively.

[0036] The second MCU is connected to the driving circuit and the needle position display unit respectively; the output terminal of the second power supply unit is connected to the second MCU, the second communication unit, the driving circuit and the needle position display unit respectively; the output terminal of the driving circuit is connected to the closed-loop motor.

[0037] The first power supply unit and the second power supply unit each include a power chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, and an inductor L1.

[0038] One end of resistor R2 is connected to resistor R1 and pin FB of power chip U1, and the other end is connected to pin GND of power chip U1 and grounded; one end of capacitor C1 is connected to pin BST of power chip U1, and the other end is connected to one end of inductor L1 and pin SW of power chip U1; one end of capacitor C2 is connected to the other end of inductor L1, and the other end is grounded; one end of resistor R3 is connected to resistor R4 and pin EN of power chip U1, and the other end is connected to pin IN of power chip U1.

[0039] The other end of the inductor L1 is connected to the first MCU, the first communication unit, the power-down retention unit, and the absolute magnetic encoder, or to the second MCU, the second communication unit, the drive circuit, and the pin position display unit.

[0040] The power-down retention unit includes an energy storage subunit and a non-volatile memory;

[0041] The energy storage subunit is connected to the non-volatile memory, the first power supply unit, and the absolute magnetic encoder, respectively; the non-volatile memory is connected to the first MCU.

[0042] The energy storage subunit is a battery or a supercapacitor, used for emergency power supply.

[0043] Both the first and second communication units are RS485 communication units, and the models can be MAX485, SN65HVD485 or ADM485.

[0044] The pin position display unit is a digital tube display screen, and the model can be selected as HS-5161A / BS or HS-30101A / BS.

[0045] Working principle of this utility model:

[0046] Based on the input color-changing command, the embroidery machine controls the drive module of the color-changing device to drive the closed-loop motor to work, and then drives the color needle module to perform the color-changing operation through the closed-loop motor, so that the color needle with the corresponding color thread moves to the working position, and the position of the color needle is detected in real time by the absolute magnetic encoder.

[0047] In summary, the advantages of this utility model are as follows:

[0048] 1. By setting up a position detection module including an absolute magnetic encoder, a drive module, and a closed-loop motor for driving the color needle module to change colors, the position detection module, drive module, and closed-loop motor are connected in sequence. The absolute magnetic encoder is used to detect the position of the color needle; that is, the absolute magnetic encoder replaces the traditional Hall sensor. Since the absolute magnetic encoder is a non-contact sensor, it not only eliminates the mechanical transmission structure and avoids failures caused by long-term wear, but also detects based on changes in the magnetic field, converting the magnetic field changes into measurable electrical signals, and thus obtaining the required position information. It can detect the position of multiple color needles simultaneously (there is no limit to the number of needle positions detected), eliminating the need to set up a separate sensor for each color needle, and the detection accuracy is much higher than that of traditional Hall sensors. By replacing the traditional open-loop motor with a closed-loop motor, the displacement accuracy of the color needle module is effectively improved, the movement deviation of the color needle is reduced, and the structure of the color changing device is simplified, which greatly improves the color changing accuracy of the embroidery machine.

[0049] 2. By setting up a position detection module and a drive module, that is, by adopting a separate drive method, the signal detection (color needle position detection) and the power part (closed-loop motor control) are completely separated, which enables the drive circuit to match greater power requirements, and the absolute magnetic encoder is not easily interfered with during the detection process, effectively improving the versatility and reliability of the color changing device.

[0050] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A colour changing device for an embroidery machine, characterised in that: The application relates to a color needle driving device, which comprises a position detection module, a driving module and a closed-loop motor for driving the color needle module to change color. The position detection module comprises a first MCU, a first communication unit, a power-off holding unit, an absolute value magnetic encoder for detecting the color needle position and a first power supply unit. The driving module comprises a second MCU, a second communication unit, a driving circuit, a needle position display unit and a second power supply unit. The first MCU, the first communication unit, the second communication unit and the second MCU are sequentially connected; the first MCU is connected with the power-off holding unit and the absolute value magnetic encoder respectively; the power-off holding unit is connected with the absolute value magnetic encoder; the output end of the first power supply unit is connected with the first MCU, the first communication unit, the power-off holding unit and the absolute value magnetic encoder respectively. The second MCU is connected with the driving circuit and the needle position display unit respectively; the output end of the second power supply unit is connected with the second MCU, the second communication unit, the driving circuit and the needle position display unit respectively; the output end of the driving circuit is connected with the closed-loop motor.

2. A colour changer for an embroidery machine according to claim 1, characterised in that: The first power supply unit and the second power supply unit both comprise a power supply chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and an inductor L1. One end of the resistor R2 is connected with the resistor R1 and the pin FB of the power supply chip U1, the other end is connected with the pin GND of the power supply chip U1 and grounded; one end of the capacitor C1 is connected with the pin BST of the power supply chip U1, the other end is connected with one end of the inductor L1 and the pin SW of the power supply chip U1; one end of the capacitor C2 is connected with the other end of the inductor L1, the other end is grounded; one end of the resistor R3 is connected with the resistor R4 and the pin EN of the power supply chip U1, the other end is connected with the pin IN of the power supply chip U1. The other end of the inductor L1 is connected with the first MCU, the first communication unit, the power-off holding unit and the absolute value magnetic encoder, or is connected with the second MCU, the second communication unit, the driving circuit and the needle position display unit.

3. A colour changer for an embroidery machine as claimed in claim 1, characterised in that: The power-off holding unit comprises an energy storage subunit and a nonvolatile memory. The energy storage subunit is connected with the nonvolatile memory, the first power supply unit and the absolute value magnetic encoder respectively; the nonvolatile memory is connected with the first MCU.

4. A colour changer for an embroidery machine according to claim 3, characterised in that: The energy storage subunit is a battery or a super capacitor.

5. A colour changer for an embroidery machine according to claim 1, characterised in that: The first communication unit and the second communication unit are both RS485 communication units.

6. A colour changer for an embroidery machine according to claim 1, characterised in that: The needle position display unit is a digital tube display screen.

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