JP2001224877A - Frame driving method in embroidery machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement high-speed embroidery by obtaining a frame movement distance set in the embroidery data without decreasing the driving speed of an embroidery machine irrelevant to the weight or the movement position of the frame body. SOLUTION: In this frame driving method in the embroidery machine driving the frame body 20 with a material to be embroidered held therein by the frame movement distance based on the embroidery data, a frame driving pattern is set by reflecting the correction value of the frame movement distance deviated from the target value according to the weight of the frame body 20 and a frame driving pattern is selected and driven according to the weight of the frame body 20 with the material to be embroidered held therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame driving method for driving a frame in an embroidery machine based on predetermined embroidery data.

[0002]

2. Description of the Related Art A general frame driving means has an X-axis driving mechanism and a Y-axis driving mechanism which are driven by a pulse motor or a servomotor under a table of an embroidery machine (sewing machine) and is disposed on the table. The drive mechanism is configured to individually transmit the driving force to a frame such as an original frame.
These X-axis drive mechanism and Y-axis drive mechanism are driven based on embroidery data including X, Y movement data for each stitch by the sewing machine. Then, in order to drive the frame with a frame movement amount based on the embroidery data, each motor in the X-axis drive mechanism and the Y-axis drive mechanism is
The drive is performed with a drive command waveform (for example, a drive current waveform corresponding to the rotation angle of the main shaft of the sewing machine) according to the frame movement amount (stitch length) of each of X and Y.

[0003]

However, depending on the weight of the frame, there is a case where the frame movement amount cannot be obtained according to the embroidery data. For example, when a servomotor is employed as a drive source for the X-axis drive unit and the Y-axis drive unit, a difference in drive inertia may occur due to the weight of the frame even when driven by the drive command waveform. The target frame movement amount cannot be obtained as a cause. When a pulse motor is used as a driving source, a difference in the amount of elongation occurs between belts and the like constituting the X-axis driving unit and the Y-axis driving unit, and a target frame moving amount cannot be obtained.
Therefore, in general, the operating speed of the sewing machine (for example, the number of revolutions of the main shaft of the sewing machine) is reduced to provide a margin for the driving time of the frame body. However, in this case, the frame moving amount according to the embroidery data is temporarily obtained. Even so, the work efficiency of embroidery is reduced.

In frame driving, as the amount of movement of the frame in the Y direction from the center position of the embroidery range in the frame increases, the swing width of the frame in the X direction tends to exceed the target value. This is considered to be because the frame body is relatively displaced with respect to the X-axis drive mechanism with the movement of the frame in the Y direction, thereby changing the power transmission portion (point of application of force). I have. Regardless of the cause, in this case also, the frame movement amount cannot be obtained in the X direction according to the embroidery data.

The present invention has as its object to solve the above problems,
An object of the present invention is to obtain a frame moving amount according to embroidery data without reducing the operating speed of an embroidery machine and to perform high-speed embroidery regardless of the weight of the frame or the moving position of the frame.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object. According to the first aspect of the present invention, a frame holding an embroidered object is driven by a frame moving amount based on embroidery data. A frame driving method in an embroidery machine, wherein a frame driving pattern is set in which a correction of an amount by which the frame moving amount deviates from a target value is set in accordance with a weight of the frame body, and a state in which an embroidery object is held. The frame drive is performed by selecting a frame drive pattern according to the weight of the frame body in step (1). In this way, by automatically or manually selecting a frame drive pattern corresponding to the weight of the frame (including the weight of the embroidery object held in the frame) and performing frame drive, the frame drive is performed regardless of the weight. Instead, the amount of frame movement according to the embroidery data is obtained. Therefore, high-speed embroidery can be properly performed while maintaining the operating speed of the embroidery machine as before.

According to a second aspect of the present invention, there is provided a method of driving a frame in an embroidery machine for driving a frame holding an embroidered object by a frame moving amount based on embroidery data. In addition to setting a frame driving pattern that reflects the correction of the amount by which the frame moving amount deviates from the target value, the moving position of the frame is detected as needed, and a frame driving pattern according to the detected moving position is selected. To drive the frame. As a result, regardless of the change in the moving position of the frame, a frame moving amount according to the embroidery data can be obtained. In this case, the operating speed of the embroidery machine can be maintained as before, and high-speed embroidery can be properly performed. .

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a block diagram schematically showing an electric control system of an embroidery machine (sewing machine). The positional relationship between the sewing machine head 10 and the frame 20 in this drawing is
The frame 20 is disposed on a sewing machine table (not shown) below the frame 20. As is well known, the sewing head 10 receives rotation of a sewing machine main shaft 14 driven by a main shaft motor 12, and drives a needle bar, a shuttle, a cloth holder, and the like (not shown) at respective timings. It has become. On the other hand, the frame body 20 receives driving forces individually from an X-axis driving mechanism 22 and a Y-axis driving mechanism 24 disposed below the sewing machine table, and is controlled to move in the X and Y directions. In the present embodiment, servo motors are used for the motors 22a and 24a that are the driving sources of the X-axis drive mechanism 22 and the Y-axis drive mechanism 24, and these motors 22a and 24a detect their individual rotational positions. Angle sensor 22 for performing
b, 24b are provided.

The controller 30 shown in FIG.
It comprises a CPU 38, a ROM 32, a RAM 34, an operation panel 36, a display control circuit 42, a display 44, an output processing circuit 46, and an input processing circuit 48. The CPU
38 controls the entire controller 30 according to a program stored in the ROM 32. RAM 34
Stores various data including display data to be displayed on the display 44. The operation panel 36 is a type of control panel that allows an operator to input various operation commands to the sewing machine and data such as embroidery data.
Specifically, it is a liquid crystal panel 60 and a key switch panel 70 of an operation panel box 55 described later. The display control circuit 42 is a control circuit for displaying the display data stored in the RAM 34 on the display 44 based on the display control data sent from the CPU 38 via the bus 40. The input processing circuit 48 is a circuit for controlling the input of data based on various detection signals related to embroidery sewing, and the output processing circuit 46 is
A signal based on the control data sent from the drive circuit 50
Is a control circuit that outputs the data.

The output processing circuit 46 of the controller 30
The spindle motor 12 is rotationally driven based on a signal output from the drive circuit 50 to the drive circuit 50, and the motors 22a, 24a of the X-axis drive mechanism 22 and the Y-axis drive mechanism 24 are driven.
Is drive-controlled. This allows the sewing head 10
Needle bar is driven together with other related members, and the frame 20
Is controlled in the X and Y directions according to the embroidery data together with the embroidery object (cloth) held therein. This frame 2
0 is detected at any time by the angle sensors 22b and 24b.
0 is input to the input processing circuit 48 and is taken in as position data of the frame 20.

In order to drive the frame 20 by a predetermined frame moving amount based on the embroidery data, the motors 22a, 24a
Is controlled with a predetermined drive command waveform for each stitch. However, depending on the weight of the frame body 20 (including the weight of the embroidery object), even if the motors 22a and 24a are driven with a predetermined drive command waveform, the frame movement amount according to the embroidery data may not be obtained. FIG. 2 is an explanatory diagram showing a frame drive pattern of the frame 20. The frame driving pattern in this drawing is the frame 20
Is reciprocated in the X and Y directions with a swing width of 5 mm.
2A shows the case where the weight of the frame 20 is smaller than the reference value, FIG. 2B shows the case where the weight of the frame 20 is the reference value, and FIG. Each case is larger than the reference value.

FIG. 2 in which the weight of the frame 20 is a reference value.
In (B), the frame 20 shows an optimal frame drive pattern. On the other hand, in FIG. 2A in which the weight of the frame 20 is less than the reference value, the swing width in the Y direction at each of the needle drop positions a1, a2, and a3 does not reach 5 mm in any of the reciprocating operations. . In FIG. 2C, the weight of the frame 20 is larger than the reference value, and the swing width in the Y direction at each of the needle drop positions a1, a2, and a3 exceeds 5 mm in any of the reciprocating motions. There are various possible causes, but frame 2
One of the causes is a difference in inertia due to a weight difference of 0, or an extension of the drive belt used in the Y-axis drive mechanism 24 (or the X-axis drive mechanism 22).

In the present embodiment, the driving circuit 5
By adjusting the position gain, speed gain, and other gains of the command signal output from 0 to the motors 22a and 24a according to the weight of the frame 20, and selectively using the drive command waveform obtained thereby, The frame 20 is always driven in a frame drive pattern as shown in FIG. FIG. 3 shows the frame 20
5 shows a setting example of a position gain with respect to a predetermined reference weight, and shows setting of an optimum gain value according to the rotation speed (rpm) and the stitch length (mm) of the sewing machine main shaft 14. The setting of these gain values is stored as a readout table in, for example, the ROM 32 of the controller 30. If the weight of the frame body 20 is larger or smaller than a predetermined value, or if the embroidery object held by the frame body 20 is heavy and the appearance of the embroidery pattern is not good, the following operation will be described. Panel box 55
To change the setting of the position gain.

FIG. 4 is a block diagram showing the front of the operation panel box 55. As shown in this drawing, on the front face of the operation panel box 55, a liquid crystal panel 60 and a key switch panel 70, which specifically show the operation panel 36, are arranged in a vertical positional relationship with each other. On the right side of the key switch panel 70, a jog dial 80 is provided. A transparent touch switch sheet is attached to the surface of the liquid crystal panel 60.
A key input can be accepted by pressing a switch figure or other portion displayed in the "." The switch figures and the like displayed on the liquid crystal panel 60 change each time the screen display is switched as described later.

FIG. 5 is an enlarged front view of the main screen of the liquid crystal panel 60. In this main screen, five button switches 61 to 65 arranged at the bottom of the screen are main menu keys. Then, by selectively pressing these button switches 61 to 65, the main screen of the liquid crystal panel 60 shifts to each screen corresponding to the switch. The relationship between the switch pressed here and the screen displayed by the switch is as follows. a. Button switch 61: Data input screen from external device. b. Button switch 62: A screen for inputting data from the memory of the sewing machine main body. c. Button switch 63; pattern data management screen. d. Button switch 64: Machine setting management screen. e. Button switch 65; manual operation screen.

FIG. 6 shows a machine setting management screen displayed when the button switch 64 is pressed. Various operating conditions of the machine (sewing machine) can be set on this machine setting management screen. By pressing a scroll key 66 on this screen, the screen of each item shown in FIG. 7 is displayed by scrolling. By pressing the item “Swing width correction A” on the screen of FIG. 7, it is possible to select “ON / OFF” for this correction. In the case of performing the swing width correction A, the X axis and the Y axis can be individually set. When the item “Yes (X-axis)” is pressed on the screen of FIG. 7, the screen shifts to a screen in which a plurality of button switches indicating individual stitch lengths are displayed as shown in FIG. It is possible to do. After pressing the button switch of “1 mm” on the screen of FIG.
When a correction value based on the setting of the position gain in FIG. 3 is input by using the ten keys 72 of the key switch panel 70, and the set key is pressed, the setting change is confirmed.

By pressing the item "Yes (Y axis)" on the screen shown in FIG. 8, the swing width correction in the Y direction can be changed and set as in the case of the X direction. In the above example, the setting change of the swing width correction based on only the stitch length has been described. However, the swing width correction based on the stitch length and the rotation speed of the sewing machine spindle 14, or the swing width correction based only on the rotation speed of the sewing machine spindle 14 is described. Of course, any of the settings can be changed. The swing width correction, that is, the setting change for correcting the frame moving amount is performed by an external storage (not shown) of the controller 30.
It can be automatically performed by a learning function based on the data stored in the.

Next, the swing width correction in the X direction according to the moving position of the frame body 20 in the Y direction will be described. FIG. 9 is a plan view showing the needle plate 16 of the sewing machine and a part of the frame body 20. The frame 20 in this drawing is located at the position where the center in the Y direction coincides with the needle hole 17 of the needle plate 16, that is, the needle drop position. Assuming that this position is a zero position with respect to this position, the frame body 20 is located on the far side (+ area) or the near side (−
Area), as described above, the frame 20
It is known that the swing width in the X direction becomes larger than the target value.

In this embodiment, the displacement of the swing width in the X direction due to the movement position of the frame 20 in the Y direction is corrected. In FIG. 9, there is almost no deviation (deviation) in the swing width in the X direction between ± 100 mm in the Y direction from the needle drop position, and the swing width in the X direction exceeds the target value in the region of −100 mm or less and +100 mm or more. . FIG. 10 shows an example of a correction value (position gain) at each position obtained by dividing the area excluding ± 100 mm in the Y-axis coordinate at intervals of 20 mm. Y900-, Y680-, and Y5 at the top of this drawing
50 to indicate the actual embroidery range in the Y direction in the frame body 20. For example, each position A to R in the column of Y900 to
Numerical values indicate respective correction values when the embroidery range in the Y direction is 900 mm. The list in FIG.
This is a result of searching for a correction value for obtaining a swing width according to embroidery data by testing a swing width of 0. Normally, it is possible to select whether or not to make a unique correction based on the embroidery range in the Y direction on the frame 20.

For example, in the case of a sewing machine having an embroidery range in the Y direction of 680 mm, the embroidery range in the Y direction is input and set to 680 mm on a machine-specific information setting screen (not shown) in the controller 30. Therefore, the operation panel box 55
By operating the liquid crystal panel 60 according to the above procedure to display the screen of each item shown in FIG. 7 and pressing the item of "Swing width correction B" on this screen, the item is highlighted as shown in FIG. Then, it is possible to select “no / do (automatic) / do (manual)” for this correction. Note that “automatic” in the case of performing the swing width correction is the default automatic correction based on the list in FIG. FIG. 11 shows a state in which “No” is selected.

FIG. 12 shows a state in which “Yes (automatic)” is selected on the screen of the swing width correction B. In this case, the correction value in the column of Y680 in the list of FIG. ＬL are displayed together with a plurality of button switches. These correction values are 68 in the Y direction.
It is automatically set in the embroidery range of 0 mm.

FIG. 13 shows a case where "Yes (manual)" is selected, and the swing width correction value can be manually set.
In this drawing, the correction value corresponding to “A” among the button switches indicating the positions A to L is highlighted. In this state, by inputting a desired numerical value with the ten keys 72 of the key switch panel 70 and pressing the set key, the correction value at the position A can be changed to a numerical value other than the automatic set value (−1). Similarly, for example, when it is desired to change the correction value of the position G, the user presses the button switch “G”, inputs a desired numerical value with the ten keys 72, and presses the set key.
The correction value of the position G can be changed and set.

Pressing the item "Yes (automatic)" on the screen shown in FIG. 13 returns to the screen shown in FIG. 12 and returns to the default automatic correction value. Then, when "YES (manual)" is further pressed on the screen of FIG. 12, the previous manual setting value is displayed on the screen of FIG.

As described above, the frame drive pattern for correcting the frame moving amount (the swing width) is set in accordance with the weight of the frame body 20 or its moving position, and this frame drive pattern is appropriately selected to drive the frame. Is performed, the frame moving amount exactly as the embroidery data is obtained. In the above description, the correction of the position gain has been described as an example, but this can be changed to a speed gain or another gain. In the above-described example, the case where the servo motors are used as the respective drive sources (motors 22a and 24a) in the X-axis drive mechanism 22 and the Y-axis drive mechanism 24 has been described. May be used. What is important is to correct the driving waveform pattern so as to be optimal according to the rotation speed of the sewing machine main shaft 14, the weight of the frame 20, the stitch length, and the like in accordance with the driving characteristics of the motor to be used. .

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an electric control system of an embroidery machine.

FIG. 2 is an explanatory diagram showing a frame driving pattern of a frame.

FIG. 3 is a table showing an example of setting a position gain with respect to a reference weight of a frame.

FIG. 4 is a configuration diagram showing a front surface of an operation panel box.

FIG. 5 is an enlarged front view of a main screen of the liquid crystal panel.

FIG. 6 is a front view showing a machine setting management screen of the liquid crystal panel.

FIG. 7 is a front view showing a screen of a swing width correction A of the liquid crystal panel.

FIG. 8 is a front view showing a screen of swing width correction A of the liquid crystal panel.

FIG. 9 is a plan view showing a needle plate of the sewing machine and a part of the frame.

FIG. 10 is a table showing a setting example of a position gain at each position on a Y-axis coordinate.

FIG. 11 is a front view showing a screen of a swing width correction B of the liquid crystal panel.

FIG. 12 is a front view showing a screen for swing width correction B of the liquid crystal panel.

FIG. 13 is a front view showing a screen of swing width correction B of the liquid crystal panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Sewing head 20 Frame 22 X-axis drive mechanism 24 Y-axis drive mechanism 30 Controller 55 Operation panel box

Continued on the front page F term (reference) 3B150 AA15 CB04 CE01 CE27 GD01 GD22 GF02 GF03 GG04 JA08 LA05 LA29 LA59 LA68 LA73 LA89 LB01 LB02 MA15 NA05 NA14 NA28 NA64 NA74 NA76 NB09 NC07 PA03 QA06 QA08

Claims (2)

[Claims] 1. A frame driving method for an embroidery machine for driving a frame holding an embroidery object with a frame moving amount based on embroidery data, wherein the frame moving amount is set to a target value according to a weight of the frame. A frame drive pattern that reflects the correction of the amount of deviation is set, and a frame drive pattern is selected according to the weight of the frame body while holding the embroidery target, and a frame drive is performed in an embroidery machine that performs frame drive. Method. 2. A frame driving method in an embroidery machine for driving a frame holding an embroidery object with a frame moving amount based on embroidery data, wherein the frame moving amount is set to a target according to a moving position of the frame. Embroidery that sets a frame drive pattern that reflects the amount of deviation from the value, detects the movement position of the frame as needed, selects a frame drive pattern according to the detected movement position, and drives the frame. Frame driving method in the machine.