CN115613236A

CN115613236A - Thread take-up mechanism and embroidery machine equipped with the same

Info

Publication number: CN115613236A
Application number: CN202211203684.6A
Authority: CN
Inventors: 陈伟星; 陈韦东
Original assignee: Zhuji Chuangjia Electronic Equipment Co ltd
Current assignee: Zhuji Chuangjia Electronic Equipment Co ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-01-17

Abstract

The invention provides a thread take-up mechanism and an embroidery machine equipped with the same, wherein the thread take-up mechanism comprises: the take-up lever is arranged on the embroidery machine head and is used for matching the thread hooking action of an upper shaft machine head and a lower shaft rotating shuttle of a main shaft of the embroidery machine and matching the X/Y shaft operation of an embroidery frame to carry out thread feeding or thread taking-up action; the take-up motor is a servo motor with an encoder, is in transmission connection with the take-up lever through a transmission mechanism and drives the take-up lever to act; and the control module is configured to output a take-up motor driver driving pulse signal according to the main shaft servo motor driver driving pulse signal based on the mapping relation between the main shaft servo motor driver driving signal and the take-up motor driver driving signal, drive the take-up motor to operate, further drive the take-up lever to swing back and forth, and execute a wire feeding or taking-up action. The thread take-up mechanism overcomes the defects that the existing curve cam driving mode is inconvenient to replace and difficult to finely adjust according to different influence factors.

Description

Thread take-up mechanism and embroidery machine equipped with the same

Technical Field

The invention relates to the technical field of embroidery machines, in particular to a thread take-up mechanism and an embroidery machine with the thread take-up mechanism.

Background

The computerized embroidery machine is one kind of industrial equipment capable of embroidering automatically based on designed pattern and can perform various kinds of decoration and processing on cloth, dress, etc. in high speed. When the embroidery machine works, the computer is controlled to control X, Y motor to drive the embroidery frame to complete the feed motion in X, Y direction; meanwhile, the main shaft driving motor drives the main shaft (comprising an upper shaft and a lower shaft) to drive the machine needle to move up and down, and the main shaft driving motor and the lower shaft are matched to finish the embroidery action, so that the embroidery is continuously carried out.

The mechanical principle of the embroidery machine for embroidering is as follows: the upper shaft drives the needle to do up-and-down reciprocating motion, and the needle runs downwards to make the upper thread (embroidery thread) penetrate into the fabric (embroidery carrier fixed on the tabouret, such as clothing fabric); the thread take-up lever is a linkage mechanism of the upper shaft machine head, and at the moment, the thread feeding action is carried out. When the needle rises, the upper thread forms a thread loop, the rotating shuttle of the lower shaft hooks the upper thread loop, the thread loop expands and is interwoven with the bottom thread in the rotating shuttle, and then the take-up lever takes up the thread. In the process, the tabouret synchronously moves horizontally to form stitches on the fabric.

The thread take-up mechanism on the existing embroidery machine usually adopts a cam in the head of the embroidery machine to drive a thread take-up lever to take up threads. The take-up lever is a linkage mechanism of an upper shaft machine head, a curve cam is arranged on the machine head, and the rotation of the main shaft is converted into the up-and-down swing of the take-up lever through the transmission of a cam connecting rod. The thread take-up mechanism is used for matching the thread take-up rod with the rotating shuttle to play the roles of thread feeding and thread taking-up in the process of embroidery of the machine head.

The angle and time of the thread feeding and the thread taking-up are critical to the thread breakage, flatness, smoothness and precision of the embroidery pattern, and the critical influence factors are the curve and the angle installation position of the cam. Various curve cams and installation positions with various angles exist in the market, and different cams and installation positions are suitable for different fabrics, embroidery threads and embroidery stitches and stitches. Due to the limitation of the structure, a plurality of curve cams cannot be installed in the machine head. Generally, when different fabrics, embroidery threads and flower shapes (the flower shapes with different stitches and stitches on an embroidery) need to be embroidered, the corresponding curve cam and the angle installation position need to be replaced and adjusted. And the cam is arranged in the machine head and sleeved on the main shaft, so the variety and the angle of the cam are not easy to change and adjust. Meanwhile, the mechanical cam has certain limitation on the shape of a contour curve due to mechanical limitation, and abnormal noise and abrasion are generated when the mechanical cam is excessively large.

On the other hand, the thickness, density and elasticity of the fabric, the thickness, elasticity, material and the embroidery pattern stitch of the embroidery thread are different, which affects the thread consumption of the upper thread. Correspondingly, the thread feeding and taking-up actions of the thread take-up mechanism also need to be adjusted in a targeted manner, otherwise, the tightness of the embroidery is not proper, the thread breakage rate is increased, and meanwhile, the attractiveness of the embroidery is affected.

Chinese utility model patent CN202509245U discloses a numerical control thread take-up mechanism, which adopts an independent motor to drive the action of the thread take-up lever, so as to replace the existing structure that adopts a cam to drive the thread take-up lever to take up thread. However, this patent discloses only one conceptual solution. In actual operation, how to ensure synchronous and coordinated operation of the take-up shaft and the main shaft is still a difficult problem. In addition, due to the influence of various factors such as the machine model, the embroidery type, the stitch and the like, the operation parameters of the thread take-up mechanism need to be continuously adjusted in the production process. In the existing scheme, the real-time and accurate adjustment of the operating parameters of the thread take-up mechanism is difficult to realize only by experience and visual observation.

Disclosure of Invention

Based on the above background, the present invention provides a thread take-up mechanism and an embroidery machine equipped with the thread take-up mechanism, which operate independently and facilitate the adjustment of actions, so as to overcome the disadvantages of the conventional driving structure that adopts a cam to drive a thread take-up lever.

In order to solve the problems, the invention adopts the following technical scheme:

a first aspect of the present invention provides a thread take-up mechanism comprising:

the take-up lever is arranged on the embroidery machine head and is used for matching the thread hooking action of an upper shaft machine head and a lower shaft rotating shuttle of a main shaft of the embroidery machine and matching the X/Y shaft operation of an embroidery frame to carry out thread feeding or thread taking-up action;

the take-up motor is a servo motor with an encoder, is in transmission connection with the take-up lever through a transmission mechanism and drives the take-up lever to act;

and the control module is configured to output a take-up motor driver driving pulse signal according to the spindle servo motor driver driving pulse signal based on the mapping relation between the spindle servo motor driver driving signal and the take-up motor driver driving signal, drive the take-up motor to operate, further drive the take-up lever to swing back and forth, and execute a wire feeding or taking-up action.

In a preferred embodiment, the transmission mechanism at least comprises a take-up shaft, and the take-up shaft is in transmission connection with the take-up motor and the take-up lever respectively directly or indirectly through the transmission mechanism.

In a preferred embodiment, the thread take-up motor is a low-inertia high-rotation-speed servo motor configured based on mechanical load, rotation characteristics, rotation angle and endangering rate characteristics of a transmission mechanism.

In a preferred embodiment, the mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the thread take-up motor driver is obtained based on the following manner:

an external encoder of a take-up shaft is arranged on the embroidery machine which adopts a curve cam as a transmission component of the take-up mechanism;

rotating the main shaft, recording the code or rotation angle of the take-up shaft corresponding to each angle interval when the main shaft rotates for one circle, and generating a comparison table of the code/rotation angle of the main shaft encoder and the code/rotation angle of the take-up shaft encoder;

and generating a mapping relation between the driving signals of the spindle servo motor driver and the driving signals of the take-up motor driver on the basis of the comparison table of the encoding/rotating angle of the spindle encoder and the encoding/rotating angle of the take-up shaft encoder.

In a preferred embodiment, the mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the thread take-up motor driver is obtained based on the following steps:

generating a comparison table of the encoding/rotating angle of the main shaft encoder and the encoding/rotating angle of the take-up shaft encoder according to the empirical data or the calculation/fitting result of the data processing model;

generating a mapping relation between the driving signals of the main shaft servo motor driver and the driving signals of the take-up motor driver on the basis of the comparison table of the encoding/rotating angle of the main shaft encoder and the encoding/rotating angle of the take-up shaft encoder;

or, according to the empirical data or the data processing model calculation/fitting result, directly generating the mapping relation between the driving signal of the spindle servo motor driver and the driving signal of the thread take-up motor driver.

In a preferred embodiment, the thread take-up mechanism further comprises a signal acquisition unit and a display unit, wherein the signal acquisition unit is used for being coupled with the control module to acquire a driving pulse signal of a spindle servo motor driver and a driving pulse signal of a thread take-up motor driver, or is used for acquiring a coding signal of a spindle encoder and a coding signal of a take-up shaft encoder; the display unit is used for displaying the acquired signals in an imaging mode.

In a preferred embodiment, the step of displaying the acquired signals includes:

the method comprises the steps of taking a driving pulse signal value of a spindle servo motor driver as a horizontal axis/a vertical axis, taking a driving pulse signal value of a take-up motor driver as a vertical axis/a horizontal axis, or taking a coded signal of a spindle coder as a horizontal axis/a vertical axis, taking a coded signal of a take-up shaft coder as a vertical axis/a horizontal axis, or taking a periodic time scale of spindle rotation as a horizontal axis/a vertical axis, and taking a coded value of the take-up shaft coder or a converted rotation angle value of the take-up shaft as a vertical axis/a horizontal axis, so as to display a take-up shaft operation curve in a coordinate plane.

In a preferred embodiment, the obtaining the mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the thread take-up motor driver further includes:

displaying a preset operating curve of the take-up shaft in a coordinate plane of the display unit based on a mapping relation between the driving signal of the main shaft servo motor driver and the driving signal of the take-up motor driver;

and the take-up shaft operation curve is fitted to the take-up shaft preset operation curve by adjusting the take-up motor driver driving pulse signal output by the control module.

and further adjusting the mapping relation between the driving signals of the main shaft servo motor driver and the driving signals of the thread take-up motor driver based on the actual operation condition of the thread take-up mechanism under different influence factors.

In a preferred embodiment, the different influencing factors include one or more of the type of the embroidery machine, experience of the operation rule, stitch or fabric of the embroidery type, and the characteristics of the embroidery thread.

In a preferred embodiment, the control module is an integrated controller, and is configured to output a driving pulse signal of the spindle servo motor driver, and output a driving pulse signal of the take-up motor driver adapted to the driving pulse signal of the spindle servo motor driver based on a mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the take-up motor driver. The second aspect of the invention provides an embroidery machine, which comprises a machine body, a machine head and an embroidery frame, wherein the machine head and the embroidery frame are arranged on the machine body; the control module is integrated with a central control system of the embroidery machine or is independently arranged and is in communication connection with the central control system of the embroidery machine.

In a preferred embodiment, the control module is configured with a storage unit, the storage unit stores mapping relationships between a plurality of items of spindle servo motor driver driving signals and take-up motor driver driving signals corresponding to different situations, and the control module is further configured to call and execute the mapping relationship between the selected item of spindle servo motor driver driving signals and the take-up motor driver driving signals according to an external instruction.

In a preferred embodiment, the control module is further configured with a mapping matching unit, and the mapping matching unit is configured to match a mapping relationship between the corresponding item spindle servo motor driver driving signal and the take-up motor driver driving signal according to different embroidery parameters, and is invoked and executed by the control module.

In a preferred embodiment, the embroidery parameters include one or more of embroidery fabric, embroidery thread type, embroidery stitch type, or personalized configuration parameters.

In a preferred embodiment, the control module is further configured with a plurality of sets of mapping switching units, and the mapping switching units are configured to identify an embroidery type according to the type of the embroidery stitch, and select and switch a mapping relationship between a driving signal of a spindle servo motor driver and a driving signal of a take-up motor driver in real time.

The invention has the following beneficial effects:

according to the take-up mechanism, the driving mechanism works independently of the machine head main shaft, and complex mechanical actions are easily completed through electronization, so that the defects that the replacement is inconvenient and fine adjustment is difficult to perform according to different influence factors due to the adoption of a curve cam driving mode in the prior art are overcome. By configuring the mapping relation between different main shaft servo motor driver driving signals and take-up motor driver driving signals and flexibly selecting or switching according to different conditions, the embroidery efficiency and quality can be effectively improved. Meanwhile, different take-up shaft operating curves are shown through the display unit based on the mapping relation between the driving signals of the main shaft servo motor driver and the driving signals of the take-up motor driver, so that the efficiency of research and test of the take-up curves can be further improved, and the individualized development of embroidery products is facilitated.

Drawings

FIG. 1 is a schematic view showing a structure of a head (including a thread take-up mechanism) of a conventional embroidery machine.

FIG. 2 is a schematic structural view of a head (including a thread take-up mechanism) of an embroidery machine according to an embodiment of the present invention.

Fig. 3 is a diagram illustrating a curve corresponding to an actual operating angle of the take-up shaft generated in the embodiment of the present invention.

FIG. 4 is a first schematic view of a pre-set operating curve of a take-up reel and an actual take-up reel operating curve according to an embodiment of the present invention.

FIG. 5 is a second schematic view of a predetermined operating curve of a take-up reel and an actual operating curve of the take-up reel according to an embodiment of the present invention.

FIG. 6 is a schematic exterior view of an embroidery machine according to an embodiment of the present invention.

Detailed Description

For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.

As shown in fig. 1, which is a schematic structural diagram of a head of a conventional embroidery machine, the head comprises a machine shell 1, a thread take-up cam 4 is mounted on a part of a main shaft (upper shaft) 2, which is positioned in the machine shell 1, one end of a thread take-up connecting rod I5 is abutted against the thread take-up cam 4, and the other end is connected with a thread take-up shaft 3; one end of the take-up link II 6 is connected with the take-up shaft 3, and the other end is connected with the take-up lever 8. The connecting end of the thread take-up lever 8 is arranged on the thread take-up lever shaft 7, and the other end is provided with a thread hole for embroidery thread to pass through. The machine shell 1 is also provided with a needle bar frame 10 arranged on a needle bar frame color changing guide rail 11, the needle bar frame 10 is provided with a plurality of needle bars 9, the tail ends of the needle bars 9 are provided with needles 12, and presser feet 13 matched with the needles 12 are configured. The needle bar 9 and the presser foot 13 are driven by the main shaft (upper shaft) 2 through a link driving mechanism, the link driving mechanism comprises a large link 22 with one end connected with the main shaft (upper shaft) 2, the other end of the large link 22 is connected with a three-hole link 19, and the three-hole link 19 is arranged in the machine shell 1 through a first pin 18, a third pin 21 and a presser foot link pin 23. One end of the presser foot link 20 is connected with the presser foot link pin 23, the other end is connected with two small links 17, and the two small links 17 are respectively connected with the needle bar driver 15, the three-eye link 19 and the presser foot silencer 16 which are arranged on the driving shaft 14.

When the machine head operates, the main shaft (upper shaft) 2 drives the needle bar 9 and the presser foot 13 to move up and down through the connecting rod driving mechanism so as to be matched with the lower shaft rotating shuttle to carry out thread hooking action, and simultaneously drives the thread picking rod 8 to be matched with the upper shaft machine head and the lower shaft rotating shuttle to carry out thread hooking action through the thread picking cam 4, the thread picking connecting rod I5 and the thread picking connecting rod II 6 and to operate in cooperation with the X/Y shaft of the embroidery frame to carry out thread feeding or thread taking-up action.

As described in the background section, the conventional embroidery machine head described above is not easy to exchange and adjust, and cannot meet the requirements for more efficient and precise production because of its mechanical limitations that limit the shape of the contour curve.

Based on the above, the invention provides a novel thread taking-up mechanism, which comprises a thread taking-up rod arranged on a machine head of an embroidery machine, a thread taking-up mechanism and a thread take-up mechanism, wherein the thread taking-up rod is used for matching the thread taking-up action of an upper shaft machine head and a lower shaft rotating shuttle of a main shaft of the embroidery machine and matching the X/Y shaft operation of an embroidery frame to carry out thread feeding or thread taking-up action; the take-up motor is in transmission connection with the take-up lever through a transmission mechanism and is used for driving the take-up lever to act; and the control module is configured to output a take-up motor driver driving pulse signal according to the main shaft servo motor driver driving pulse signal based on the mapping relation between the main shaft servo motor driver driving signal and the take-up motor driver driving signal, drive the take-up motor to operate, further drive the take-up lever to swing back and forth, and execute a wire feeding or taking-up action.

The invention also provides an embroidery machine provided with the novel thread take-up mechanism. The embodiment of the present invention will be described in further detail with reference to specific examples.

Example 1

Referring to fig. 2, there is shown a new thread take-up mechanism of the present invention, the basic structure of which is similar to that of the head of the conventional embroidery machine shown in fig. 1, and will not be described repeatedly herein. The difference is that in the embodiment shown, the part of the main shaft (upper shaft) 2 located in the machine shell 1 is not provided with a thread take-up cam, and correspondingly, the thread take-up link one 5 in fig. 1 is not provided. In this embodiment, a thread take-up motor (not shown) is additionally provided, and the thread take-up motor is directly or indirectly connected with the thread take-up shaft 3 to drive the thread take-up shaft 3 to rotate in a reciprocating manner, so as to drive the thread take-up lever 8 to move through the thread take-up connecting rod two 6, thereby adapting to the thread take-up action of the upper shaft machine head and the lower shaft rotating shuttle, and performing the thread feeding or the thread take-up action in cooperation with the X/Y axis operation of the embroidery frame.

In this embodiment, the new thread take-up mechanism further includes a control module configured to output a drive pulse signal of the thread take-up motor driver according to the drive pulse signal of the spindle servo motor driver based on a mapping relationship between the drive signal of the spindle servo motor driver and the drive signal of the thread take-up motor driver, so as to drive the thread take-up motor to operate, and further drive the thread take-up lever to swing back and forth to perform a thread feeding or taking-up action.

In the implementation, the driving pulse signal of the take-up motor driver is output according to the driving pulse signal of the main shaft servo motor driver based on the mapping relation between the driving signal of the main shaft servo motor driver and the driving signal of the take-up motor driver, so that the coordination degree of the movement of a take-up shaft driven by the take-up motor and a needle and a rotating shuttle driven by a main shaft (an upper shaft and a lower shaft) is further improved, the operation of the whole machine head is more coordinated, efficient and accurate, and the machine efficiency is effectively improved. Meanwhile, the thread take-up mechanism works independently of the main shaft of the machine head, and complex mechanical actions are easily completed by electronization, so that the defects that the replacement is inconvenient and fine adjustment is difficult to perform according to different influence factors due to the adoption of a curve cam driving mode in the prior art are overcome. In addition, by configuring the mapping relation between different main shaft servo motor driver driving signals and take-up motor driver driving signals and flexibly selecting or switching according to different conditions, the embroidery efficiency and quality can be effectively improved.

The mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the thread-taking-up motor driver is specifically a corresponding relationship (corresponding table) between a driving signal pulse value of the spindle servo motor driver and a driving signal pulse value of the thread-taking-up motor driver, wherein a driving signal pulse value of the spindle servo motor driver is correspondingly configured for each angle (such as 1 degree) in the rotation process of the spindle, so that the rotation of the spindle is accurately controlled; the take-up spool is similar.

Preferably, in this embodiment, the thread take-up motor is a low-inertia high-rotation-speed servo motor with an encoder selected based on the mechanical load, the rotation characteristic, the rotation angle and the endangering rate characteristic of the transmission mechanism.

In a preferred showing scheme, the control module is an integrated controller and is simultaneously connected with the main shaft servo motor driver and the take-up motor driver, and the core driving part is controlled by the same CPU and is used for outputting a driving pulse signal of the main shaft servo motor driver and outputting a driving pulse signal of the take-up motor driver matched with the driving pulse signal of the main shaft servo motor driver based on the mapping relation between the driving signal of the main shaft servo motor driver and the driving signal of the take-up motor driver.

Or, in another scheme, the control module may also be a split controller, and the two controllers are respectively used for controlling the main shaft servo motor driver and the thread take-up motor driver, and are connected through a line to perform real-time communication, so as to ensure the synchronism of the output signal.

rotating the main shaft to a specific angle (generally, the highest or the lowest position of the take-up lever), and adjusting the take-up shaft encoder to 0 degree;

rotating the main shaft, and recording the code or rotation angle of the take-up shaft corresponding to each angle interval when the main shaft rotates for one circle (an angle disc is arranged on the main shaft, the angle disc is rotated, the take-up shaft encoder corresponding to the main shaft angle disc with 360 degrees displays the angle, and the general main shaft records the code/rotation angle of the main shaft and the take-up shaft encoder when rotating for 1 degree), and generating a comparison table of the code/rotation angle of the main shaft encoder and the code/rotation angle of the take-up shaft encoder;

and generating a mapping relation between the driving signals of the main shaft servo motor driver and the driving signals of the take-up motor driver based on the comparison table of the encoding/rotating angle of the main shaft encoder and the encoding/rotating angle of the take-up shaft encoder.

In an illustrative example, the table of the encoding/rotation angle of the spindle encoder and the encoding/rotation angle of the take-up shaft encoder obtained by the above method is shown in the following table:

TABLE 1

Alternatively, in another illustrative example, a similar table of spindle encoder encoding/rotational angle to take-up spool encoder encoding/rotational angle mapping may be generated from empirical data or data processing model calculation/fitting results as in table 1 above; and then generating a mapping relation between the driving signals of the main shaft servo motor driver and the driving signals of the take-up motor driver based on the comparison table of the encoding/rotating angle of the main shaft encoder and the encoding/rotating angle of the take-up shaft encoder.

In an illustrative example, a graph similar to that shown in fig. 3 may be generated according to a comparison table of the encoding/rotation angle of the spindle encoder and the encoding/rotation angle of the pick-up shaft encoder, with the encoding/rotation angle of the spindle encoder as a horizontal axis and the encoding/rotation angle of the pick-up shaft encoder as a vertical axis, so as to facilitate visual display and further adjustment.

Alternatively, in another example shown, the mapping relationship between the spindle servo motor driver driving signal and the thread take-up motor driver driving signal may be generated directly from empirical data or a data processing model calculation/fitting result.

Specifically, a mapping relation between the encoding/rotation angle of the main shaft encoder and the encoding/rotation angle of the take-up shaft encoder or between the driving signal of the main shaft servo motor driver and the driving signal of the take-up motor driver can be generated or edited according to the principle/model of the embroidery machine, the experience of the operation rule, the embroidery type stitch, the fabric and the characteristics of the embroidery thread.

As a further preferred embodiment, in an illustrated embodiment, the thread take-up mechanism of the present invention further comprises a signal acquisition unit and a display unit. The signal acquisition unit is used for being coupled with the control module to acquire a driving pulse signal of a main shaft servo motor driver and a driving pulse signal of a take-up motor driver or used for acquiring a coding signal of a main shaft encoder and a coding signal of a take-up shaft encoder. The display unit is used for displaying the acquired signals in an imaging mode.

In an illustrative example, the step of displaying the acquired signals in an image comprises the step of displaying the operation curve of the take-up shaft in a coordinate plane by taking the driving pulse signal value of the spindle servo motor driver as a horizontal axis and the driving pulse signal value of the take-up motor driver as a vertical axis.

In an illustrative example, referring to fig. 4, the step of displaying the picked-up signals includes displaying the operation curve 202 of the pick-up shaft in the coordinate plane with the horizontal axis of the periodic time scale of the rotation of the main shaft (unit of milliseconds, one period is 60000 milliseconds for 1 minute, and the figure shows 25988-27022 milliseconds), and the vertical axis of the converted rotation angle value of the pick-up shaft (one period is ± 5000, and the figure shows-827-404 intervals, -700 is equivalent to the reverse rotation of the pick-up shaft or the pick-up motor by 25.2 °).

As a preferred embodiment, referring to fig. 4, a preset operation curve 201 of the take-up shaft may also be displayed in the above coordinate plane of the display unit based on a mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the take-up motor driver;

furthermore, the actual take-up shaft operating curve 202 can be fitted to the take-up shaft preset operating curve 201 by adjusting the driving pulse signal of the take-up motor driver output by the control module.

As a further preferred embodiment, in an illustrated embodiment, the mapping relationship between the spindle servo motor driver driving signal and the thread take-up motor driver driving signal can be further adjusted based on the actual operation condition of the thread take-up mechanism under different influence factors.

Wherein, the different influencing factors comprise the type of the embroidery machine, the experience of the operation rule, the embroidery type stitch or fabric and the embroidery thread characteristics.

Specifically, the actual take-up shaft operation curve and the take-up shaft preset operation curve can be superposed and compared under different working conditions (load and rotating speed) or different rotating speed states, and whether the actual take-up shaft operation curve reaches the set state or not is tested and verified. And when needed, adjusting the driving pulse signal of the take-up motor driver to enable the actual take-up shaft operating curve to be close to the preset operating curve of the take-up shaft.

As a further preferred embodiment, in an illustrative example, referring to fig. 5, it is also possible to display different types of take-up

shaft operating curves

202 and 203 in the coordinate plane of the display unit; therefore, the influence of different parameter settings on the operating curve of the take-up shaft can be observed more clearly, and the set parameters can be adjusted more conveniently and accurately.

Example 2

The second embodiment of the invention provides an embroidery machine, which comprises a machine body, a machine head and an embroidery frame, wherein the machine head and the embroidery frame are arranged on the machine body; the control module of the thread take-up mechanism is integrated with a central control system of the embroidery machine or is independently arranged and is in communication connection with the central control system of the embroidery machine.

Specifically, referring to fig. 6, in an illustrated example, the embroidery machine includes a frame 101, a frame girder 102 mounted on the frame 101, a plurality of heads 103 mounted on the frame girder 102, and a main shaft composed of an upper shaft 104 and a lower shaft 105. The main shaft motor 107 is installed on the back of the frame girder 102, and drives the upper shaft 104 through the main shaft motor synchronous belt 110. The lower shaft 105 is synchronized with the upper shaft 104 by an upper shaft lower shaft timing belt 106 provided in a transmission case 108. The side of the transmission box 108 is also provided with a main shaft angle dial 109 corresponding to the upper shaft 104. The machine head 103 is provided with a needle bar frame 111, and a needle bar, a presser foot and the like which are mounted on the needle bar frame 111, and the specific structure is described in embodiment 1, and will not be described in detail here. The upper shaft 104 is in turn coupled to each head to drive the needle and presser foot in operation. The lower shaft 105 is coupled to each of the shuttle boxes (inside which the rotating shuttles) 112 corresponding to the heads. The frame girder 102 is also provided with a thread take-up motor 113, the thread take-up motor 113 is connected with a thread take-up transmission shaft 115 through a thread take-up motor synchronous belt 114, the thread take-up transmission shaft 115 is connected with thread take-up shafts 117 on the machine heads through thread take-up shaft synchronous belts 116 or synchronous gears, and the thread take-up shafts 117 further drive the thread take-up mechanism to operate. Reference is made in detail to the example in example 1, which is not described in detail here. In addition, a color changing box 118 is arranged on the frame girder 102 and is connected with the machine head through a color changing pull rod 119. The control module of the thread take-up mechanism is not shown in the figure, and can be integrated in the electric control system of the embroidery machine or be arranged independently without specific limitation. Similarly, the display unit may be integrated with the embroidery machine or may be provided independently, again without specific limitation.

In an illustrated example, the control module of the thread take-up mechanism is configured with a storage unit, the storage unit stores a mapping relationship between a plurality of items of spindle servo motor driver driving signals corresponding to different situations and the thread take-up motor driver driving signals, and the control module is further configured to call and execute the mapping relationship between the selected item of spindle servo motor driver driving signals and the thread take-up motor driver driving signals according to an external instruction (manual selection instruction).

As a further preferred implementation, in an illustrated embodiment, the control module is further configured with a mapping matching unit, and the mapping matching unit is configured to automatically match the mapping relationship between the corresponding driving signal of the spindle servo motor driver and the driving signal of the thread take-up motor driver according to different embroidery parameters, and is invoked and executed by the control module.

The embroidery parameters comprise embroidery fabric, embroidery thread types, embroidery stitch types or personalized configuration parameters.

As a further preferred implementation, in an illustrated embodiment, the control module is further configured with a mapping switching unit, and the mapping switching unit is configured to identify an embroidery type according to the type of the embroidery stitch, and select and switch a mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the thread take-up motor driver in real time.

The embroidery stitch includes plain stitch, collapsed stitch, long stitch or short stitch.

Specifically, in an illustrated example, the mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the thread take-up motor driver can be pre-selected according to the embroidery fabric, the type of embroidery thread, the embroidery experience and the individual requirements;

then, based on the types, editing and setting the sequence of the selected mapping relation according to the types of the embroidery stitch (stitches such as a plain stitch, a flat covering stitch, a collapsed rice, a long stitch, a short stitch and the like);

then, editing and setting the sequence of the mapping relation according to the sequence of the color changing (pause codes);

and setting a switching mapping relation during pattern plate making.

Or, in an illustrated example, the central control system of the embroidery machine can automatically identify the embroidery type for budget calculation according to the types of the embroidery needle methods (plain stitch, collapsed stitch, long stitch, short stitch and the like), and automatically select embroidery electronic control and switch the mapping relation between the driving signal of the main shaft servo motor driver and the driving signal of the take-up motor driver in real time, so as to achieve intelligent automation.

The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A thread take-up mechanism, comprising:

and the control module is configured to output a take-up motor driver driving pulse signal according to the main shaft servo motor driver driving pulse signal based on the mapping relation between the main shaft servo motor driver driving signal and the take-up motor driver driving signal, drive the take-up motor to operate, further drive the take-up lever to swing back and forth, and execute a wire feeding or taking-up action.

2. The thread take-up mechanism as claimed in claim 1, wherein the transmission mechanism comprises at least a thread take-up shaft, and the thread take-up shaft is in transmission connection with the thread take-up motor and the thread take-up lever respectively, directly or indirectly through the transmission mechanism.

3. The thread take-up mechanism as claimed in claim 2, wherein the thread take-up motor is a low inertia high speed servomotor configured based on mechanical load, rotational characteristics, rotational angle and agonal rate characteristics of the transmission mechanism.

4. The thread take-up mechanism as claimed in claim 1, wherein the mapping relationship between the spindle servo motor driver driving signal and the thread take-up motor driver driving signal is obtained based on:

5. The thread take-up mechanism as claimed in claim 1, wherein the mapping relationship between the spindle servo motor driver driving signal and the thread take-up motor driver driving signal is obtained based on:

or, according to empirical data or a data processing model calculation/fitting result, directly generating a mapping relation between the driving signal of the spindle servo motor driver and the driving signal of the take-up motor driver.

6. The thread take-up mechanism as claimed in claim 4 or 5, further comprising a signal acquisition unit and a display unit, wherein the signal acquisition unit is used for coupling with the control module to acquire a driving pulse signal of the spindle servo motor driver and a driving pulse signal of the thread take-up motor driver, or is used for acquiring a coding signal of the spindle encoder and a coding signal of the take-up shaft encoder; the display unit is used for displaying the acquired signals in an imaging mode.

7. The thread take-up mechanism as claimed in claim 6, wherein the imagewise displaying of the acquired signals comprises:

8. The thread take-up mechanism as claimed in claim 7, wherein obtaining the mapping relationship between the spindle servo motor driver driving signal and the thread take-up motor driver driving signal further comprises:

displaying a preset operation curve of the take-up shaft in a coordinate plane of the display unit based on the mapping relation between the driving signal of the spindle servo motor driver and the driving signal of the take-up motor driver;

and fitting the operation curve of the take-up shaft to a preset operation curve of the take-up shaft by adjusting a driving pulse signal of a take-up motor driver output by the control module.

9. The thread take-up mechanism as claimed in claim 8, wherein obtaining the mapping relationship between the spindle servo motor driver driving signal and the thread take-up motor driver driving signal further comprises:

10. The thread take-up mechanism as claimed in claim 9, wherein said different influencing factors include one or more of the type of embroidery machine, experience of the operating rules, embroidery type stitch or stitch material, and thread characteristics.

11. The thread take-up mechanism as claimed in claim 1, wherein the control module is an integrated controller for outputting the driving pulse signal of the spindle servo motor driver and outputting the driving pulse signal of the thread take-up motor driver adapted to the driving pulse signal of the spindle servo motor driver based on a mapping relationship between the driving signal of the spindle servo motor driver and the driving signal of the thread take-up motor driver.

12. An embroidery machine, comprising a machine body, a machine head and an embroidery frame, wherein the machine head and the embroidery frame are arranged on the machine body, and the machine head is provided with the thread take-up mechanism according to any one of claims 1 to 11; the control module is integrated with a central control system of the embroidery machine or is independently arranged and is in communication connection with the central control system of the embroidery machine.

13. The embroidery machine as claimed in claim 12, wherein said control module is configured with a storage unit, said storage unit stores several mapping relations of the spindle servo motor driver driving signal and the thread take-up motor driver driving signal corresponding to different situations, said control module is further configured to call and execute the selected mapping relation of the spindle servo motor driver driving signal and the thread take-up motor driver driving signal according to an external instruction.

14. The embroidery machine as claimed in claim 13, wherein said control module is further configured with a mapping matching unit for matching the mapping relationship between the corresponding spindle servo motor driver driving signal and the thread take-up motor driver driving signal according to different embroidery parameters, and is invoked and executed by the control module.

15. An embroidery machine as claimed in claim 14, wherein said embroidery parameters include one or more of embroidery fabric, embroidery thread type, embroidery stitch type or personalization configuration parameters.

16. The embroidery machine as claimed in claims 13-15, wherein said control module is further configured with a plurality of sets of mapping switching units for identifying embroidery types according to types of embroidery stitches, and selecting and switching mapping relationships between the driving signals of the spindle servo motor driver and the driving signals of the thread take-up motor driver in real time.