JP3325976B2 - Data changing device for zigzag embroidery machine with rotation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data changing device for a rotating zigzag embroidery machine suitable for realizing an embroidery pattern such as a rotating zigzag pattern based on embroidery data.

[0002]

2. Description of the Related Art In general, a base on which a lower thread for embroidery is disposed, and an embroidery needle on the upper thread side is reciprocated up and down at a position opposed to the lower thread side provided on the base. And a head of the embroidery machine that swings at a required swing width W, and is provided under the head so as to be movable on the base, and is driven forward and rearward on the base by a driving source. A moving frame driven in left and right directions (x-axis direction and y-axis direction), and an embroidery cloth is held in an extended state in the moving frame. A rotary zigzag embroidery machine comprising an embroidery cloth and a rotary frame rotated at a rotation angle Δθ is known, for example, from Japanese Patent Application Laid-Open No. 5-192468.

In this kind of conventional zigzag embroidery machine with rotation, when the embroidery needle is reciprocated up and down while swinging the embroidery needle at a required swing width W by the head of the embroidery machine, the moving frame is x. Since the embroidery cloth is rotated by the rotation angle Δθ together with the rotating frame in the moving frame while being driven in the axis and y-axis directions, the zigzag pattern corresponding to the swing width W of the embroidery needle is rotated. There is an advantage that an embroidery pattern (a curved embroidery pattern having a swing width) can be realized on the embroidery cloth in a relatively short time.

[0004] Further, in this rotating zigzag embroidery machine,
For example, data including the rotation angle Δθ of the rotating frame and the swing width W of the embroidery needle by the teaching work are converted into data C (Δx, Δy, Δ
θ, W), the data C at the center of this frame
(Δx, Δy, Δθ, W) are converted to data N (ΔX, ΔY, Δθ, ΔN) of the center of the embroidery needle with respect to the center of the rotating frame.
By performing the conversion operation to W), there is an advantage that the embroidery pattern can be enlarged, reduced or changed based on the embroidery data obtained by the conversion operation.

In this rotary zigzag embroidery machine, for example, when an embroidery pattern as shown in FIG. 9 is created, the embroidery cloth held in an extended state on the rotary frame together with the moving frame is moved from the starting point N0 to the needle. Center N1, N2, N3, ..., Ni-
2, the frame is moved while rotating by a predetermined rotation angle Δθ to the positions of Ni−1, and the embroidery needles are alternately swung to the left with a swing width W at these positions, with the swing width W (W / 2), and to the right. By oscillating by the swing width (W / 2), the embroidery needles are sequentially moved to the positions of the needle drop points S0, S1, S2, S3,. A curved embroidery pattern having a swing width is formed.

Next, from the position of the needle drop point Si-1 to the needle center N
While returning the embroidery needle to the position of i-1, the embroidery cloth is moved along with the moving frame to the position of the needle drop point Si, and the embroidery needle is moved at the position of the needle drop point Si.
A pattern is formed between "i-1" and "Si" by "walking of thread". At the next position of the needle center Ni + 1, the moving frame is moved while moving the rotating frame with the embroidery cloth by the rotation angle Δθi + 1 shown in FIG.
The embroidery needle is moved to the position of the needle drop point Si + 1 by swinging from the position 1 to the left by the swing width (Wi + 1/2). After that, the embroidery needle is moved to the frame while rotating the embroidery cloth by the predetermined rotation angle Δθ together with the rotation frame, thereby moving the embroidery needles to the needle centers Ni + 2,..., Nk,.
Nm, the embroidery needles are swung to the left and right to sequentially move the needles to the needle drop points Si + 2,..., Sk,.
A curved embroidery pattern having a swing width formed by the “line of threads” is formed.

In this case, the needle center Nn (n = 0, 1, 2,..., I,
…, K,… m)

[0008]

## EQU1 ## where Nn (.DELTA.Xn, .DELTA.Yn, .DELTA..theta.n, Wn) where .DELTA.Xn = Xn-Xn-1.DELTA.Yn = Yn-Yn-1.DELTA..theta.n = .theta.n-.theta.n-1. Quantity (ΔX
n, ΔYn), rotation angle Δθn, swing width Wn, and 6-byte data including function data (not shown).

Then, the starting point N0, the needle centers N1, N2,
The embroidery data of..., Ni−1, Ni + 1,.

[0010]

N0 (ΔX0, ΔY0, Δθ0, W0) N1 (ΔX1, ΔY1, Δθ1, W1) N2 (ΔX2, ΔY2, Δθ2, W2):: Ni−1 (ΔXi−1, ΔYi−1, Δθi) 1, Wi-1) Ni + 1 (ΔXi + 1, ΔYi + 1, Δθi + 1, Wi + 1) :: Nk (ΔXk, ΔYk, Δθk, Wk) :: Nm (ΔXm, ΔYm, Δθm, Wm) It is expressed as

The embroidery data of the needle drop point Si which forms the pattern by "walking of the thread" has both the rotation angle .DELTA..theta.i and the swing width Wi equal to zero, the frame movement amount (.DELTA.Xi, .DELTA.Yi) and the function data (shown in FIG. ), So-called walking data (hereinafter referred to as 3-byte data) consisting only of

[0012]

## EQU3 ## This is expressed as Si (.DELTA.Xi, .DELTA.Yi).

When the embroidery machine is actually operated, these embroidery data are stored in the needle center data N (ΔX, ΔY,
From the data ΔΔ, W), the data C (Δx, Δy, Δθ,
W)

[0014]

N (ΔX, ΔY, Δθ, W) → C (Δx, Δ
y, Δθ, W), and the data C (Δx, Δ
The operation of the embroidery machine head, drive source and rotation source is controlled based on (y, Δθ, W). Also, the embroidery data of the needle drop point Si which has become the 3-byte data is:

[0015]

## EQU5 ## Although the conversion operation is performed as Si (.DELTA.Xi, .DELTA.Yi) .fwdarw.Ci (.DELTA.xi, .DELTA.yi), in this case, the rotation angle .DELTA..theta.
Since both i and the swing width Wi are zero, the frame movement amounts are substantially the same after the conversion operation.

[0016]

In the above-described zigzag embroidery machine with a rotation according to the prior art described above, the head, the drive source and the drive source of the embroidery machine based on the embroidery data including the rotation angle Δθ of the rotating frame and the swing width W of the embroidery needle. By controlling the operation of the rotation source, an embroidery pattern as illustrated in FIG. 9 can be reproduced on the embroidery cloth at high speed and with high quality. The glossiness and bulge (bump) of the embroidery pattern are what is called a lockstitch embroidery machine. It has surpassed.

However, the quality of the embroidery pattern in this case is not so noticeable in a curved portion having a small swing width. In this curved portion, the rotating frame is rotated by a rotation angle Δθ for each stitch together with the embroidery cloth for each stitch. In addition, there is a problem that the embroidery speed itself is reduced, and the high speed in realizing the embroidery pattern is impaired.

That is, the needle drop points Si + 1, S illustrated in FIG.
In the curved embroidery part formed by i + 2, ..., Sk, ... Sm,
While moving the moving frame from the position of the needle drop point Si to the position of the needle center Ni + 1, the rotating frame is rotated together with the embroidery cloth by the rotation angle Δθi +
Since it is necessary to rotate the embroidery by one minute, the embroidery speed is greatly reduced. Thereafter, the embroidery needle is moved to the position of the needle center Ni + 2,..., Nk,... Nm while repeating the frame movement of the moving frame and the rotation of the rotating frame by the rotation angle Δθ (forward direction or reverse direction). It is necessary to sequentially move the embroidery needles to the needle drop points Si + 2,..., Sk,... Sm to the left and right with a small swing width W, which also reduces the embroidery speed. On the other hand, in a curved portion having a small swing width, there is a problem that high speed in realizing an embroidery pattern is easily impaired.

The present invention has been made in view of the above-described problems of the prior art, and the present invention uses the needle embroidery data at the center of the needle corresponding to the curved portion having a small swing width as the needle drop point without the swing angle Δθ and the swing width W. Embroidery data, the embroidery speed can be effectively increased, and an embroidery pattern can be reproduced on an embroidery cloth at high speed and with high quality. It is intended to be.

[0020]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a data reading means for reading embroidery data at the center of a needle including a rotation angle Δθ of a rotating frame and a swing width W of an embroidery needle; The rotation angle Δθ is compared with a predetermined angle α based on the embroidery data of the needle center read by the data reading means, and the swing width W is compared with a predetermined swing width β. Data determining means for determining whether or not the embroidery portion is a small curved portion, and when the data embroidery portion is determined to be a curved portion having a small swing width, the embroidery data of the needle center is determined. A data changing means for changing and calculating the embroidery data of the needle drop point is adopted.

The data determining means determines whether or not the corresponding embroidery part is a curved part having a small swing width from the embroidery data for a plurality of stitches read by the data reading means. When the data determining unit determines that the corresponding embroidery portion is a curved portion having a small swing width, the changing unit determines a remaining portion of the embroidery data for the plurality of stitches excluding the last read embroidery data. It is preferable that the embroidery data is collectively changed to the embroidery data of each needle drop point.

Further, the data changing means adds the respective rotation angles Δθ included in the embroidery data for the plurality of stitches, and calculates a total angle ΣΔθ of the added rotation angles Δθ in the embroidery data for the plurality of stitches. It is preferable that the rotation angle Δθ of the last read embroidery data is updated.

[0023]

With the above arrangement, based on the embroidery data for each stitch read by the data reading means, it is determined whether or not the rotation angle Δθ of the embroidery data is equal to or larger than a predetermined angle α, for example, two degrees before and after. Then, it is determined whether or not the embroidery speed is reduced when the rotating frame is rotated by the rotation angle Δθ.
Also, it is compared whether the swing width W of the embroidery data is equal to or smaller than a predetermined swing width β of, for example, 3 mm before and after, and the embroidery needle is not swung by the swing width W without rotating the rotating frame. It is determined whether the embroidery quality is not affected even if the embroidery is performed.

When the rotation angle Δθ of the embroidery data is equal to or larger than the predetermined angle α and the swing width W is equal to or smaller than the predetermined swing width β, the corresponding embroidery portion becomes a curved portion having a small swing width. If the embroidery is performed by swinging the embroidery needle by the swing width W while rotating the rotating frame, the embroidery speed itself may be reduced. In this case, the embroidery data centered on the needle is changed by the data changing means. To the embroidery data of the needle drop point, and realizes the embroidery pattern only by moving the frame without rotating the rotating frame or swinging the embroidery needle and without substantially affecting the embroidery quality Embroidery speed can be increased.

When the remaining embroidery data of the embroidery data for a plurality of stitches, excluding the embroidery data read last, is collectively changed to the embroidery data of each needle drop point. By adding the rotation angles Δθ included in the embroidery data for the needles, and updating the total angle ΣΔθ of the added rotation angles Δθ as the rotation angle Δθ of the last embroidery data, the embroidery data for the plurality of needles is updated. Of the embroidery data, the rotation frame can be rotated by the total angle ΣΔθ at the same time by the last embroidery data, and the rotation angles Δθ included in the embroidery data for the plurality of stitches can be canceled before and after each other to collectively rotate. The rotation time during rotation can be reduced.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a data changing apparatus for a zigzag embroidery machine with rotation according to the present invention will be described with reference to FIGS. In the embodiment, the same reference numerals are given to the same components as those in the conventional technique shown in FIG. 9 described above, and the description thereof will be omitted.

In the drawing, reference numeral 1 denotes a base of a zigzag embroidery machine with rotation, and the base 1 has a plurality of legs 2, 2,.
A support frame 3 provided on each of the legs 2, and a moving frame 13, which will be described later, as shown in FIG.
A substantially rectangular needle plate 4 is provided below the rotating frame 15 and the like. The needle plate 4 has an embroidery needle 10 to be described later.
The needle hole through which is inserted is formed in an oval shape, and a bobbin (both not shown) for a bobbin thread is provided below the needle hole. As shown in FIG. 2, the support plate 3 has an x-axis direction frame moving mechanism 5 for moving the moving frame 13 in the left-right direction (hereinafter, referred to as x-axis direction), and a moving frame 13 in the front-rear direction (hereinafter, y direction).
And a frame moving mechanism 6 in the y-axis direction for moving the moving frame 13 in the x-axis direction.
Guide rollers 5A and 6A for guiding in the y-axis direction
And each guide rail 5B, 6B etc. are provided.

Reference numeral 7 denotes a support plate 3 extending on the moving frame 13.
FIG. 2 shows a sewing machine head as a head of an embroidery machine provided above. The sewing machine head 7 is driven via a flywheel 9 and the like by a spindle motor 8 disposed below the support plate 3 as shown in FIG. The embroidery needle 10 on the upper thread side is reciprocated up and down via the needle shaft 11 at a position facing the lower thread side. The sewing head 7 is provided with a needle shaft swing motor 12 (see FIG. 5) composed of a pulse motor. The needle shaft swing motor 12 moves the embroidery needle 10 around a fulcrum 11A of the needle shaft 11 as shown in FIG. As shown in (1), swinging is performed in the left-right direction (x-axis direction) with the swing width W, for example.

Reference numeral 13 denotes a movable frame which is located below the sewing machine head 7 and is movably provided on the support plate 3. The movable frame 13 is formed in a substantially rectangular plate shape as shown in FIG. A rim (not shown) protruding downward is provided on the lower surface side. The moving frame 13 is held in such a manner that its edge is engaged with the guide rollers 5A and 6A of the frame moving mechanisms 5 and 6, and the frame moving mechanisms 5 and 6 are controlled by a frame moving motor 14 (see FIG. 5) described later. By driving, the x-axis direction and y
It is moved in the axial direction.

Reference numeral 14 denotes a frame moving motor as a driving source for driving the frame moving mechanisms 5 and 6 to move the moving frame 13 in the x-axis direction and the y-axis direction. An x-axis motor for moving in the axial direction and a y-axis motor for moving in the y-axis direction (both not shown);
It is constituted by a pulse motor or the like.

Reference numeral 15 denotes a rotating frame which is rotatably arranged at the center of the moving frame 13. The rotating frame 15 holds the embroidery cloth 16 in an extended state, and holds the embroidery cloth 16 on the moving frame 13. The rotation frame 15 is rotated by a rotation angle Δθ about the frame center C.

Reference numeral 17 denotes a frame rotation motor as a rotation source provided on the moving frame 13, and the output shaft of the frame rotation motor 17 is connected to the rotation frame 15 via a timing belt (not shown) or the like. , The rotary frame 15 is rotationally driven on the movable frame 13 with a rotation angle Δθ. Here, the frame rotation motor 1
Reference numeral 7 denotes a pulse motor similar to the frame moving motor 14 and the like, and performs open-loop control of the rotating frame 15 in the forward or reverse direction according to the number of pulses of a pulse signal output as a control signal from a sewing machine control unit 36 described later. Rotated by

Numeral 18 designates a cheese table serving also as a cover which is disposed on the support plate 3 at a predetermined height.
Above is a bobbin 19 for the upper thread as cheese, 19, ...
And an upper thread guide 21 for supplying the upper thread 20 from each bobbin 19 to the sewing head 7.

Reference numeral 22 denotes an operation box provided on the cheese table 18 via a bracket 23. The operation box 22 has a display 24, a power supply ON and an OF as shown in FIG.
F switches 25A and 25B, soft keys 26, a keyboard 27, a floppy disk device 28, and the like are provided, and a part of the sewing machine control unit 36 is incorporated. And
The soft keys 26 are used to read and write embroidery data, input and output data, enlarge and reduce the embroidery data in accordance with the menu displayed on the display 24, and further set mechanical conditions, change patterns, select patterns, and select patterns. , A so-called interactive key for performing a combination of patterns, changing colors, and the like.

The keyboard 27 is provided with a drive switch 29, a start switch 30, a stop / back switch 31, a jog key section 32, a ten key section 33, a buzzer 34, a variable speed knob 35, and the like.
The jog key unit 32 includes a frame moving key 32 in the x and y axis directions.
A, the origin switch 32B and the frame rotation key 32C,
32C and the like are provided. Then, the jog key section 32
When the frame moving key 32A is manually operated by the operator, the frame moving motor 14 is driven to move the moving frame 13 in the x-axis direction and the y-axis direction by a moving amount corresponding to the operation time. Prior to the creation of the embroidery pattern, each frame rotation key 32C is used, for example, for the texture of the embroidery cloth 16 and the rotation frame 15C.
The rotation frame 15 is rotated manually together with the embroidery cloth 16 by the frame rotation motor 17 when manually adjusting the rotation position.

On the other hand, the frame moving mechanisms 5, 6
Origin switches (both not shown) on the x-axis and y-axis sides are provided below the center of the embroidery needle 10 and the frame center of the rotary frame 15 as shown in FIG. When C coincides with the embroidery needle 10, this is detected through the frame moving mechanisms 5 and 6, and the sewing machine controller 36 and the like determine that the moving frame 13 is at the origin position with respect to the embroidery needle 10. I have. Although the origin of the rotation angle Δθ and the swing width W is detected in the same manner, the description thereof is omitted here.

Further, reference numeral 36 denotes a sewing machine control unit which is disposed below the support plate 3 at a position close to the operation box 22 and which constitutes a data changing device for a zigzag embroidery machine with a rotation. A soft key 2 is provided on the input side as shown in FIG.
6, a keyboard 27, a floppy disk device 28, and the like are connected, and in some cases, a tape reader, an editing machine, a pattern making machine, and a teaching machine (all not shown).
Are connected, for example, via a communication line or the like. On the output side of the sewing machine control unit 36, the spindle motor 8, the needle shaft swing motor 12, the frame moving motor 14, the frame rotating motor 17,
The display 24 and the floppy disk device 28 are connected.

The sewing machine control section 36 stores the programs shown in FIGS. 6 to 8 in its storage circuit, and stores the main spindle motor 8, the needle shaft swing motor 12, the frame moving motor 1 and the like.
Prior to the sewing machine control processing for controlling the operation of the sewing machine 4 and the frame rotation motor 17 and the like (see Japanese Patent Application Laid-Open No. 5-192468), condition setting processing for changing the embroidery data at the needle center to the embroidery data at the needle drop point is performed. It has become. In the storage circuit of the sewing machine control section 36, for example, embroidery data of the center of the needle read from the floppy disk device 28 is stored in the storage area 36A, and the rotation angle Δ
A predetermined angle α for determining θ, a predetermined swing width β for determining the swing width W, a number of stitches γ for determining a predetermined number of stitches, a counter c, and the like are stored.

Here, the predetermined angle α, the predetermined swing width β, the number of stitches γ, and the like must be input using the soft keys 26, the keyboard 27, etc. at the time of shipping or actual operation of the zigzag embroidery machine with rotation. Is stored in the storage area 36A such that the predetermined angle α is 2 degrees, the predetermined swing width β is 3 mm, and the number of stitches γ is 8 stitches.
Is input by the ten key section 33.

The sewing machine controller 36 partially converts the data N (.DELTA.X, .DELTA.Y, .DELTA..theta., W) of the needle center N read from the outside into embroidery data of the needle drop point by a condition setting process described later. The embroidery data after the change calculation (embroidery data in which the data of the needle center and the data of the needle drop point are mixed) is converted into the embroidery data in the same manner as in the prior art (Japanese Patent Laid-Open No. 5-192468).
The data is converted into data C (Δx, Δy, Δθ, W) of the frame center C, and based on the data C (Δx, Δy, Δθ, W), the main spindle motor 8, the frame moving motor 14, the frame rotating motor 17, and the needle shaft The embroidery needle 10,
The moving frame 13 and the rotating frame 15 are moved and rotated, and FIG.
Is realized on the embroidery cloth 16.

The data changing apparatus for a zigzag embroidery machine with rotation according to the present embodiment has the above-described configuration. Next, a condition setting process by the sewing machine controller 36 will be described with reference to FIG.
This will be described with reference to FIG.

First, the condition setting processing is designated by operating the soft key 26 or the like, and when the processing operation starts, the counter c is reset to "c = 0" in step 1. In step 2, the data N (.DELTA.X, .DELTA.Y, .DELTA..theta., W) of the needle center is read as embroidery data for each start point N0, needle centers N1, N2, N3,. The process proceeds to step 3 to determine whether or not the read data for each stitch is end data. In addition,
When it is determined "YES" in step 3, it is the end of the embroidery data, and the processing operation is ended.

If "NO" is determined in the step 3, the process proceeds to a step 4, and it is determined whether or not the swing width W of the embroidery data at this time is "W = 0".
If it is determined to be "S", since it is the 3-byte data shown in Equation 4 above, for example, the pattern is formed by "walking thread" like the needle drop point Si shown in FIG. The embroidery data for the next first stitch is read, and the processing from step 3 onward is continued. If "NO" is determined in step 4, the process proceeds to step 5 to determine whether or not the rotation angle Δθ of the embroidery data at this time is equal to or greater than a predetermined angle α of, for example, 2 degrees, and determines “NO”. When the rotation angle Δθ is very small, the embroidery speed itself does not substantially decrease even if the rotating frame 15 is rotated by the rotation angle Δθ by the frame rotation motor 17, so that the process returns to step 2 and returns to the next embroidery. The data is read, and the processing after step 3 is continued.

If "YES" is determined in the step 5, the process proceeds to a step 6, and it is determined whether or not the swing width W of the embroidery data at this time is equal to or smaller than a predetermined swing width β (for example, 3 mm). If it is determined "NO" in step 6, for example, the needle drop points S0 and S0 shown in FIG.
The swing width W is larger than a predetermined swing width β, such as a curved embroidery pattern formed by 1, S2, S3,..., Si-2, Si-1. Embroidery without rotating the rotating frame 15
Since the embroidery quality may be reduced, the process returns to step 2 to read the next embroidery data in the same manner as described above, and continues the processing from step 3 onward.

Next, when it is determined "YES" in the step 6, for example, the needle drop points Si + 1, Si + shown in FIG.
2,..., Sk,..., Sm are curved portions (embroidery portions) in which the swing width W is less than or equal to a predetermined swing width β, such as a curved embroidery pattern. When the embroidery is performed by sequentially rotating the rotating frame 15 by the rotation angle Δθ, the embroidery speed itself is significantly reduced.
In step 7 shown in FIG. 7, the counter c is set to "c + 1".
Then, the process proceeds to step 8 to read the next embroidery data of the first stitch.

Next, in step 9, it is determined whether or not the embroidery data read in step 8 is end data. If "NO" is determined, then steps 10, 11,
The process proceeds to step S12 to perform the same determination processing as in steps 4, 5, and 6. Then, if "YES" is determined in step 10, or if "NO" is determined in steps 11 and 12, the process proceeds to step 13 where the count value of the counter c reaches a predetermined number of stitches γ (for example, 8 stitches). Judge whether or not
While the determination is “NO”, the processing after step 7 is repeated.

If "YES" is determined in the step 13, the counter c is set to "c + 1" in the step 7.
The embroidery data of a predetermined number of stitches γ (for example, eight stitches) sequentially read in step 8 while stepping up is embroidery data having a large swing width W, and the embroidery data of the eight stitches at this time is Is changed to the embroidery data at the needle drop point as described later, the quality of the embroidery pattern may be degraded. The data is stored as it is without changing the data from the data to the data of the needle drop point, and the process returns to the step 1 to continue the subsequent processes.

Next, when "YES" is determined in step 12, the embroidery data corresponding to the curved portion having a small swing width W is determined in step 6, and the counter c is set to "c + 1" in step 7. The embroidery data of the next first stitch (that is, the c-th stitch less than the predetermined number of stitches γ) read in step 8 while stepping forward is stored at the needle drop points Si + 1, Si + 2 shown in FIG. ,..., Sk,..., Sm correspond to a curved portion having a small swing width W, such as a curved embroidery pattern.
5, the embroidery data of c stitches (equal to the count value of the counter c) sequentially read in the step 8 is (c-
1) The embroidery data up to the needle is changed from the embroidery data at the center of the needle to the embroidery data at the needle drop point by the following equations (6) to (8).

That is, the needle centers Ni + 1,.
The embroidery data of Nk,..., Nm is as shown in Equation 2 above.
When these embroidery data are represented as absolute position data,

[0050]

Ni + 1 (Xi + 1, Yi + 1, θi + 1, Wi + 1) :: Nk (Xk, Yk, θk, Wk) :: Nm (Xm, Ym, θm, Wm), The embroidery data of these needle centers Ni + 1,..., Nk,.

[0051]

## EQU7 ## Si + 1 (Xi + 1 ± Wi + 1/2 cos θi + 1, Yi + 1 ± Wi + 1/2 sin θi + 1) :: Sk (Xk ± Wk / 2 cos θk, Yk ± Wk / 2sin θk) :: Sm (Xm ± Wm / 2 cos θm, Ym ± Wm / 2sin θm) The absolute position data of the needle drop points Si + 1,..., Sk,. 5-192467
This can be changed by using the same arithmetic expression as the arithmetic expression proposed in Japanese Patent Laid-Open Publication No. H10-110,036.

Thus, the needle centers Ni + 1,..., Nk,
The embroidery data of..., Nm are needle drop points Si + 1,.
…, Sm embroidery data

[0053]

## EQU8 ## Ni + 1 (ΔXi + 1, ΔYi + 1, Δθi + 1, Wi + 1) → Si + 1 (ΔXsi + 1, ΔYsi + 1): Nk (ΔXk, ΔYk, Δθk, Wk) → Sk (ΔXsk, ΔYsk) :: Nm (ΔXm, ΔYm, Δθm, Wm) → Sk (ΔXsm, ΔYsm).

Then, of the embroidery data of c stitches (equal to the count value of the counter c) read in the step 8,
(C-1) After the embroidery data up to the needle is changed to the data of the needle drop point at once in step 15, the process proceeds to step 16, where the embroidery data for the c-th needle (data of the center of the needle) is obtained. The rotation angle Δθ included in

[0055]

.Times..DELTA..theta. =. Theta.i + 1 + .theta.i + 2 +... And the total angle .SIGMA..DELTA..theta. Rotation angle Δθ of the latest) embroidery data
And stored (stored). Then, in the next step 18, the counter c is set to "c = 0", and the processing after step 7 shown in FIG. 7 is continued again.

In this case, the needle drop point Si + 1 illustrated in FIG.
, Si + 2,..., Sk,..., Sm, assume that the curved embroidery pattern corresponds to a curved portion having a small swing width W. In step 8, the needle centers Ni + 2,. Is determined in step 12 every time the embroidery data (including embroidery data exceeding a predetermined number of stitches γ) is sequentially read, and every time the arithmetic processing of steps 15 and 16 is repeated, the c-th stitch is determined in step 17. Since the rotation angle Δθ of the embroidery data is updated to the total angle ΣΔθ, for example, the embroidery data of the needle center Nm has the rotation angle Δθ,

[0057]

数 Δθ = θi + 1 + θi + 2 +... + Θk... + Θm The total angle is updated to ΣΔθ.

When the zigzag embroidery machine with rotation is operated to create an embroidery pattern as illustrated in FIG. 9, the embroidery data of the needle centers Ni + 1,..., Nk,. Needle drop points Si + 1, ..., Sk, ...,
Based on the embroidery data of Sm, the embroidery patterns for a plurality of needles are swung by the swing width W of the embroidery needle 10 or the rotating frame 15 is rotated by the rotation angle Δθ.
After the moving frame 13 is created only by moving the frame without rotating the frame, the rotating frame 15 is rotated collectively by the total angle ΣΔθ, and the embroidery pattern of the first and subsequent stitches following the needle drop point Sm is obtained. The total angle ΣΔθ
Prevents displacement in the rotation direction by an amount.

In this case, after creating an embroidery pattern for a plurality of stitches only by moving the moving frame 13 based on the embroidery data of the needle drop point calculated and changed, the rotating frame 15 is moved by the total angle ΣΔθ. Since the rotation is performed collectively, the forward direction or the reverse direction previously included in the embroidery data for the number of needles γ at this time (in the embroidery pattern illustrated in FIG. 9, the rotation direction is changed before and after the needle center Nk. ) Can be canceled before and after the rotation angle Δθk, for example, and the rotation time when the rotation frame 15 is rotated collectively can be effectively reduced. Can be shortened.

Thus, according to the present embodiment, the embroidery data at the center of the needle is sequentially read for each stitch, and it is determined whether or not the rotation angle Δθ of this data is equal to or greater than a predetermined angle α of, for example, 2 degrees. It is determined whether or not the swing width W is equal to or smaller than a predetermined swing width β (for example, 3 mm). If there is embroidery data satisfying this, at least the number of consecutive stitches γ (8 stitches) including this data is included. The embroidery data for the consecutive (γ-1) needles that are sequentially searched are sequentially searched for in the processing of steps 7 to 12 shown in FIG. Can be determined. If the embroidery data for successive (γ-1) stitches sequentially searched is data that does not need to be changed, the processing in step 14 determines the number of stitches γ (8 Need to change the embroidery data for It can be automatically stored as intact data.

Then, one of the sequentially searched embroidery data for c stitches (c <γ) has a rotation angle Δθ greater than or equal to a predetermined angle α.
If the swing width W is equal to or less than the predetermined swing width β and the data needs to be changed, then the data that does not need to be changed is (γ).
-1) By repeating the processing of Steps 7 to 12 and Steps 15 to 18 until the number of stitches continues, for example, needle drop points Si + 1, Si + 2,..., S shown in FIG.
It can be determined that a curved portion (embroidery portion) having a small swing width W, such as a curved embroidery pattern formed by k,..., Sm, continues. The remaining embroidery data excluding the read embroidery data can be collectively changed and calculated by the equation (8).

As a result, the embroidery data at the center of the needle corresponding to the curved portion (embroidery portion) having a small swing width W is collectively changed to the embroidery data at the needle drop point for a plurality of needles.
When the rotating zigzag embroidery machine is actually operated to create an embroidery pattern as illustrated in FIG. 9, the needle center Ni + 1
,..., Nk,..., Nm, the moving frame 13 is sequentially moved based on the needle embroidery data of the needle drop points Si + 1,. Sk,
.., Sm, the embroidery patterns for a plurality of needles can be realized collectively by simply moving the frame to the position of Sm. At this time, the embroidery needles 10 are swung by the swing width W, and the rotating frame 15 is rotated by the rotation angle. It is not necessary to rotate by Δθ, and it is possible to effectively prevent a reduction in embroidery speed when actually creating an embroidery pattern.

After the embroidery data for a plurality of stitches is collectively changed from the data at the center of the needle to the data at the needle drop point, the embroidery data for the plurality of stitches (the data at the center of the needle) previously included in the embroidery data are stored. Since the rotation angle Δθ of the embroidery data is added by the formulas 9 and 10, and the total angle ΣΔθ at this time is updated and stored (stored) as the rotation angle Δθ of the embroidery data read last. Based on the calculated embroidery data of the needle drop points, the embroidery patterns of a plurality of stitches can be formed without moving the embroidery needle 10 by the swing width W or rotating the rotating frame 15 by the rotation angle Δθ. After creating only the movement, the rotation frame 15 is moved to the total angle Σ by the last embroidery data.
The embroidery patterns subsequent to the first stitch can be reliably prevented from being displaced in the rotation direction by the total angle ΣΔθ by the total angle ΔΔθ.

Further, the embroidery patterns for a plurality of stitches are moved to the moving frame 13 based on the embroidery data of the needle drop points calculated and changed as described above.
After the frame is created only by moving the frame, the rotating frame 15 is rotated collectively by the total angle ΣΔθ with the last embroidery data, so that the forward or reverse direction previously included in the embroidery data for a plurality of stitches at this time. When the rotation angle Δθ is added by the equation (10), the front and rear rotation angles Δθ can be offset each other, and the rotation time when the rotating frame 15 is rotated collectively can be effectively reduced. be able to.

Accordingly, in the present embodiment, a curved embroidery pattern formed by the needle drop points Si + 1, Si + 2,..., Sk,. By changing the embroidery data of the center of the needle corresponding to the portion to the embroidery data of the needle drop point having no rotation angle Δθ and swing width W, the embroidery speed can be effectively increased, and the embroidery pattern can be effectively placed on the embroidery cloth 16. High speed and high quality reproduction.

When the condition setting processing shown in FIGS. 6 to 8 is performed, the predetermined angle α, the predetermined swing width β, the number of stitches γ, etc. Is appropriately changed and stored in the storage area 36A in an updatable manner, and even for a curved embroidery portion having a small swing width, the gloss of the embroidery When it is desired to emphasize the bulge (swelling), the operation can be canceled by operating the soft key 26 or the like so that the change calculation by the condition setting process is not performed. There are various effects such as the ability to appropriately designate or cancel the calculation.

In the above embodiment, steps 2 and 8 of the programs shown in FIGS. 6 to 8 are specific examples of the data reading means which is a component of the present invention. Steps 10 to 12 show specific examples of the data determination means.
Steps 6 and 17 show specific examples of the data changing means.

In the above embodiment, one of the sequentially searched embroidery data for c stitches has a rotation angle Δ not less than a predetermined angle α.
If θ and the swing width W is equal to or smaller than the predetermined swing width β, it is determined that the embroidery data for c stitches corresponds to a curved portion (embroidery portion) having a small swing width W, and (c)
-1) It has been described that the embroidery data up to the stitches are collectively changed and calculated by the equation (8).
For example, when it is determined that the embroidery data for eight stitches (the number of stitches γ) sequentially searched corresponds to a curved portion (embroidery portion) having a small swing width W, the embroidery data for the number of stitches γ is obtained from the data at the center of the needle. The change calculation may be performed collectively on the needle drop point data. In addition, the embroidery data is sequentially searched for each stitch, and when it is determined that the embroidery data corresponds to a curved portion (embroidery portion) having a small swing width W, the embroidery data at the center of the needle is determined for each stitch. Of course, the embroidery data may be changed.

Furthermore, in the above-described embodiment, the data changing device is constituted by the sewing machine control unit 36 provided on the base 1 of the zigzag embroidery machine with rotation. However, the present invention is not limited to this, and the present invention is not limited to this. A data changing device is separately provided outside the zigzag embroidery machine, and data is input and output from the data changing device to a sewing machine controller of the rotating zigzag embroidery machine via a communication line or a storage medium such as a floppy disk. You may do so.

Further, in the above embodiment, the embroidery needle 10
Has been described as having a swing width W from the center of the needle in the left-right direction that is the x-axis direction. However, the present invention is not limited to this. For example, the embroidery needle 10 can be swung from the center of the needle in the front-rear direction that is the y-axis direction. The hand may be moved with W.

[0071]

As described above in detail, according to the present invention, the rotation angle Δθ is compared with the predetermined angle α based on the embroidery data of the center of the needle read by the data reading means, and the swing width W is changed to the predetermined swing width β. When the data determination unit determines that the corresponding embroidery portion is a curved portion having a small swing width by comparing with the embroidery data at the needle center, the data change unit changes the embroidery data at the needle drop point by the data change unit. When the embroidery is performed by rotating the rotating frame, the embroidery speed itself is reduced even though the embroidery quality is not substantially affected. By changing the center embroidery data to the needle drop point embroidery data, the embroidery pattern can be realized only by moving the frame without swinging the embroidery needle or rotating the rotating frame, and the embroidery speed is effective. Fast It can be reproduced in high speed and high quality on the embroidered cloth handle.

When the embroidery data for (c-1) needles, which are a plurality of needles, is collectively changed to the embroidery data for each needle drop point, the embroidery data for c needles at this time is respectively applied. By adding the included rotation angle Δθ, and updating the total angle ΣΔθ of the added rotation angle Δθ as the rotation angle Δθ of the embroidery data of the last c-th needle, the rotation frame is summed with the embroidery data of the c-th needle. The rotation can be collectively rotated by ΣΔθ, and the rotation angles Δθ included in the embroidery data for the c stitches, which are a plurality of stitches, can be canceled before and after each other, thereby reliably reducing the rotation time during the batch rotation. .

[Brief description of the drawings]

FIG. 1 is a front view showing a zigzag embroidery machine with rotation according to an embodiment of the present invention.

FIG. 2 is a plan view of the rotating zigzag embroidery machine shown in FIG.

FIG. 3 is an enlarged front view of the operation box shown in FIG. 1;

FIG. 4 is an explanatory diagram showing a swing width of a needle shaft and an embroidery needle.

FIG. 5 is a control block diagram of the rotating zigzag embroidery machine shown in FIG. 1;

FIG. 6 is a flowchart showing a condition setting process for performing a change operation.

FIG. 7 is a flowchart showing a condition setting process following FIG. 6;

FIG. 8 is a flowchart showing a condition setting process following FIG. 7;

FIG. 9 is an explanatory diagram of an embroidery pattern showing each needle center, each needle drop point, and the like according to the related art.

[Description of Signs] 1 base 3 support plate 5, 6 frame moving mechanism 7 sewing machine head (head of embroidery machine) 10 embroidery needle 12 needle shaft swing motor 13 moving frame 14 frame moving motor (drive source) 15 rotating frame 16 Embroidery cloth 17 Frame rotation motor (rotation source) 22 Operation box 24 Display 26 Soft keys 28 Floppy disk device 36 Sewing machine control unit N Needle center S Needle drop point

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D05B 19/00-21/00

Claims (3)

(57) [Claims] 1. A data reading means for reading embroidery data at a needle center including a rotation angle Δθ of a rotating frame and a swing width W of an embroidery needle, and embroidery data at the needle center read by the data reading means. Comparing the rotation angle Δθ with a predetermined angle α,
By comparing the swing width W with a predetermined swing width β, a data determination unit that determines whether the corresponding embroidery portion is a curved portion having a small swing width, and a corresponding embroidery portion is determined by the data determination unit. A data changing device for changing the embroidery data at the center of the needle to the embroidery data at the needle drop point when it is determined that the embroidery data is a curved portion having a small swing width. . 2. The data judging means judges whether or not a corresponding embroidery part is a curved part having a small swing width from embroidery data for a plurality of stitches read by the data reading means. When the data determining unit determines that the corresponding embroidery portion is a curved portion having a small swing width, the changing unit determines a remaining portion of the embroidery data for the plurality of stitches excluding the last read embroidery data. 2. The data changing device for a rotating zigzag embroidery machine according to claim 1, wherein the embroidery data is collectively changed into embroidery data of each needle drop point. 3. The embroidery data for the plurality of stitches, wherein the data changing means adds the respective rotation angles Δθ included in the embroidery data for the plurality of stitches, and calculates a total angle ΣΔθ of the added rotation angles Δθ among the embroidery data for the plurality of stitches. 3. The data changing device for a zigzag embroidery machine with a rotation according to claim 2, wherein the data is updated as the rotation angle Δθ of the embroidery data read last.