JPS6116189B2 - - Google Patents

Description

[Detailed description of the invention] The outline of a design to be embroidered is converted into positional coordinates and read, the outline is displayed as a video corresponding to the read positional coordinates, and embroidery stitches are formed within the outline. This invention relates to a data creation method for an embroidery sewing machine that sets needle drop points on contour lines.

Conventionally, in this type of embroidery machine, when creating embroidery data, the coordinate points of figures such as letters were entered using a keyboard using a microcomputer, but this method made the work extremely complicated and reduced work efficiency. I wanted to lower it. In addition, when inputting data using the keyboard, it is easy to make incorrect inputs due to operational errors. Once the data has been entered, it must be checked by actually embroidering it, and if an error occurs, all coordinate points must be entered from the beginning again using the keyboard. It was complicated.

The object of the present invention is to eliminate the drawbacks of the above-mentioned conventional devices.

Embodiments of the invention will be described with reference to the drawings. Reference numeral 1 denotes a base having a flat upper surface 1a, and a sewing machine 2 is mounted on the upper surface 1a so that the bed surface 2a is on the same plane as the upper surface 1a.The sewing machine 2 is mounted on the same axis as the main shaft (not shown). The needle 4 is moved up and down in conjunction with a drive motor 3 installed at. Reference numeral 5 denotes a support frame, which removably supports an embroidery frame 6 for holding cloth stretched thereon. ) along the axial direction of the main shaft of the sewing machine on the upper surface 1a.
It is possible to move in a direction that is a combination of the direction and the Y direction that intersects the direction and the axial direction. Reference numeral 7 denotes a floppy reading means, which has an insertion portion 7a that allows a floppy disk (not shown) to be attached or removed, and reads data from an inserted floppy disk. Reference numeral 8 designates a keyboard, which includes a group of key operations 9 for reading out the floppy data read by the reading means and writing data related to sewing operations of the sewing machine 2, movement control of the support frame 5, etc. to the floppy data, etc.; It has a display section 10 that displays data input or output in relation to key operations of the key group 9 in characters.

11 is a well-known tablet (coordinate reading device)
and the cursor (reader) through the code
Connect 12. The cursor 12 has a transparent glass 13 with a cross-shaped mark 13a in the center inserted into a window hole penetrating vertically at one end, and sixteen operation keys 14 arranged on the top surface of the other end. 14
A lamp 15 is provided that lights up to confirm the generation of a signal during operation. When the cursor 12 is placed on the top surface of the tablet 11, the position coordinates on the top surface of the tablet 11 corresponding to the intersection of the cross-shaped marks 13a at the placement position are detected (see FIG. 2), and are related to the operation of the operation keys 14. The position coordinates are read and a coordinate signal corresponding to each coordinate is generated.

Reference numeral 16 denotes a control device, including a display means 17 for performing CRT display, an insertion section 18a for removably attaching a system floppy disk (system disk) for writing basic data, and a data floppy disk for writing data to be read by the floppy reading means 7. It has an insertion part 18b that allows a disk (data disk) to be attached or detached, a floppy control means 18 that writes to or reads from each floppy disk, an operation means 19 that has a plurality of keys, and a ROM, RAM, CPU, etc. The control circuit includes a control circuit (not shown), and a program based on the flow shown in FIG. 4 is stored in the control circuit as described later. In the flow shown in Figure 4,
Load the graphic input correction program "PTIN ₁ " from the system disk, write the processed data of that "PTIN ₁ " to the stem disk when inputting, read the processed data once written from the system disk when making corrections, and then write the data to the system disk again. Rewrite to disk as processed data.
After processing "PTIN ₁ ", it is determined whether there is a display command, and when a display command is issued, the input pattern display program "PTDIP" is read from the system disk, and the above processing is executed from the system disk based on the "PTDIP". Data to display means 17
Display on CRT. After processing "PTDIP" or when there is no display command, it is determined whether or not there is any modification, and when modification is performed, the modified processing data is rewritten based on the program "PTIN ₁ " described above. If there is no correction, the needle drop coordinate calculation output program "PTOUT" is read from the system disk, the processing data on the system disk is processed, and the processing results, that is, data such as needle drop coordinates, are written to the data disk and the flow is completed.

The drawing input correction program (PTIN ₁ ) will be further explained with reference to the flowchart in FIG. It is determined whether the data to be read is a new input, that is, a modification, and if it is new, the number of times the original image read on the tablet 11 has been enlarged is read by key input from the cursor 12. This multiplication factor is input using the numeric keys "1" to "9" of the cursor 12. For example, when "4" is entered, the scale is 1/4 times as large as when "1" is entered. . Next, a "baseline" is determined. The base line is a standard Xn coordinate specified in advance for plotting the needle drop point, and is characterized by an inclination angle θ with respect to the absolute X coordinate of the tablet 11, as shown in FIG. 3A. The inclination angle θ is determined as follows using the cursor 12 based on the flow shown in FIG. That is, place the mark 13a of the cursor 12 on the absolute coordinate point (Xa, Ya) and press the key 14a.
By pressing , first read the coordinates of point (Xa, Ya), then move away from point (Xa, Ya) (Xb,
By pressing key 14a at point (Xb),
Yb) Read the coordinates of the point. From these, the distance in the X-axis direction LX = Xb - Xa and the distance in the y-axis direction LY =
Yb−Ya is calculated, then LXY=√(−) ²
+(Yb−Ya) ² is calculated, cosθ=LX/LXY,
sinθ=LX/LXY has been determined, and from now on the absolute coordinate
The base line tilted θ relative to the base line becomes the X-axis. this baseline
Xn and absolute coordinates (X, Y) are Xn=Xcosθ−
There is a relationship of Ysinθ. Thus the coordinate transformation coefficient cos
Once θ and sin θ are determined, data reading operation begins based on the flow shown in FIG.

In this embodiment, as will be explained in detail later, when reading the original image, the original image is divided into a plurality of blocks as shown in FIG. 3B, for example. 1st
In this embodiment, the "sewing type" in "sewing type selection" in the flowchart of FIG. 1 is three types: pattern stitching, embroidery stitching, and jump. Instruct by key 14m. Pattern sewing is the first
Embroidery stitching refers to sewing only the outline of the pattern as shown in Figure 2A, embroidery stitching refers to filling the inside of the pattern with sewing thread as shown in Figure 12B, and jump refers to sewing the outline of the pattern as shown in Figure 12C. This means that the stitch progresses from point ₁ to point _P2 without the needle dropping. For example, as shown in FIG.
This is a counter that sequentially adds up the points in the block from 1 to 5. First, the count value P is set to "0", and each time a point is read with the cursor 12, the count value P is set to "1". Only count up. Next, it is determined whether "all points have been completed", that is, whether reading of the block has been completed. When the "14n" key of the cursor 12 is pressed, it is determined that reading of the block has ended. If "all points completed" has not been reached, it is determined whether "block rereading" is to be performed. "Block rereading" is a case where the operator presses the key 14j of the cursor 12 to correct the data of the entire block when an undesired point is read due to an operator's operational error. key 1
When 4j is pressed, the data for all points in the block is cleared and the data must be read from the beginning. If key 14j is not pressed,
Determine "previous point input error". "Previous point input error" means that the data just entered is incorrect, and the operator presses the key 1 of the cursor 12 to correct the data.
This is the case when i is pressed. When the key 14j is pressed, the count value P of the point counter counts down by ``2'' and then counts up by ``1'', so the previous data is cleared and it becomes possible to continue with the correct data. . When neither the key 14j nor the key 14i is pressed, the following "straight line", "circle", or "arc" reading operation is immediately entered.

In this embodiment, each side (straight line), circular arc, and circle forming the edge of one block is referred to as a unit. It is well known that a straight line is determined by two points at both ends of the line, and circles and arcs are determined by three points that are not on the same line, and this geometric property is utilized to determine the units in this example. There is. That is, for example, if there is only one point to determine an arc, or conversely if there are four or more points, it should be regarded as an error, and such a check is performed according to the flow shown in FIG.

At cursor 12, specify a straight line using key 14.
b, the designation of an arc corresponds to the key 14c, and the designation of a circle corresponds to the key 14d, respectively. cursor 12
These different designating operations will be explained in the flowchart of FIG. 13.

In Figure 13, first of all, "number of straight lines,""number of arc points,""number of circle points,""number of arcs," and "number of circles" used below.
The count value of each counter is set to "0" in advance. Below, in connection with the operation of the key 14b, key 14c, or key 14d of the cursor 12, the "number of straight lines", "number of arc points", or "number of circle points" will be described, respectively.
The counter counts up by "1". When the "number of straight lines" counter counts up by "1", the counted value of the "number of arc points" counter is determined. For example, when inputting points P ₁ to _{P 4} as shown in FIG. 14, it is assumed that P ₁ to _{P 3} are circular arcs and P ₃ to _{P 4} are straight lines. If you align the mark 13a of the cursor 12 with point _P1 and press the key 14c, then align the mark 13a with point _P2 and press the key 14c, the count value of the "arc point" counter will become "2". . At this time, mark 13a
When the key 14b is pressed with the key 14b applied to point P ₃ , points P ₁ , P ₂ ,
One arc is determined by P ₃ , so "number of arcs"
The count value of the counter increases by "1", and since the determination of one arc is completed, the "arc point" counter is cleared to "0". In this case, it is normal, so the check function of the flow shown in FIG. 13 does not operate. However, when the "arc point number" counter is "1", that is, the 15th
As shown in the figure, when you input P ₁ , cursor 1
If you align the mark 13a of 2 with the point _P2 and press the key 14b that indicates a straight line, the buzzer will sound and a data input error will be reported because the arc cannot be determined from _P1 and _P2 . . In this case, the 11th
According to the flow shown in the figure, it is necessary to press the key 14j or the key 14y of the cursor 12 to correct the data. In addition, in FIG. 16, if you press the key 14C at both points P ₁ and P ₂ and also press the key 14C at point P ₃ , the arc is determined by the points P ₁ , P ₂ , and P ₃ and The count value of the "Number of arcs" counter is incremented by "1" in the same way as above, but at point P ₃
is considered to be the end of the arc and the starting point of the next arc, and the count value of the "Number of arcs" counter is "0".
It becomes "1" instead, and there is no error. In addition, in Fig. 17, if the keys 14d are pressed at both points P ₁ , P ₂ , and P ₃ , the count value of the yen point number counter becomes "3" and the yen is made up of points P ₁ , P ₂ , and P ₃ . Since it is determined, the count value of the "Yen number" counter is incremented by "1". So, if the point in the circle
Match mark 13a of cursor 12 with P ₄ and press key 1
When 4d is pressed, the count value of the "yen point" counter is further incremented by "1" and becomes " ₄ ", but in this embodiment, as shown in _FIG . , P ₂ , and P ₃ are formed, so this is not considered an error. but,
When the count value of the "yen score" counter is further incremented by "1" and reaches "5", there are too many points, and a buzzer sounds to notify an error.

In this way, when all points have been checked, the count value of the "arc point number" counter at the end point is judged, and if the count value is "0", the arc has already been completed, so the next flowchart in Figure 17 is shown. Proceed to. Further, as shown in FIG. 19, if the count value of the "arc point number" counter at the point Pl-1 immediately before the final point Pl is "2", input with the key 14n of the cursor 12 at the final point Pl. data and point P
An arc is completed using the three data _l-2 and P _l-1 to complete one arc, and the count value of the "number of arcs" counter is incremented by "1". However, if the "arc point number" counter at point _l-1 is "1"
If so, it will be impossible to complete the arc with the final point Pl, so a buzzer will sound to notify the error.

Figure 20 shows that the point data input in Figures 11 and 12 is divided into multiple units of straight lines, arcs, or circles, and for each unit, the configuration data used for calculating the needle drop point, which will be described later, is divided. It is a flow for giving. Here, the number of units is the sum of the counts of the "number of straight lines" counter, "number of circular arcs" counter, and "number of circles" counter in the flow of FIG.

Configuration data refers to the D
They are five numbers (X, 1) to D(X, 5).
X is a serial number for identifying each unit. First, D(X, 1) is a code to indicate the type of unit, and is given as ``0'' for a straight line, ``1'' for a circular arc, and ``2'' for a circle. D(X, 2) is given the number of the starting point of the unit (see FIG. 3B), and D(X, 3) is the number of the midpoint of the unit. However, since a straight line unit does not have a midpoint, it is given "-1" for convenience. D(X, 4) is given the number of the end point of the unit. In particular, if the final unit of a block is a straight line, the end point of that unit coincides with the start point of the block, so if J=0, D(X, 4)=0+1=1 and J=0+1
= Return to 1. Even if the last unit of the block is an arc, the end point of that unit coincides with the start point of the block, so first set J = -1 and then set D.
Return (X, 4)=-1+2=1 and J=-1+2=1. When the data check and the assignment of configuration data to each unit are completed for one block, the process returns to the flow shown in FIG. 5 and the designations of "swing" and "pitch" are input. "Pitch" is performed in units of 0.1 mm using the numerical keys 14a to 14j of the cursor 12. For example, if you press key 14b and key 14c in succession, the pitch between the needle drop points will be 0.1 x 12 = 1.2.
mm is set.

Next, the cursor 12 is used to specify the "swing" within one block. In this embodiment, there are two types of "swings": "direction designation" as shown in FIG. 30, and "medium swing" as shown in FIG. 36. In "direction specification", although not shown, the cursor 12 is
First press the key 14a once, then move the cursor 12
By moving the mark 13a and pressing the key 14a again, the swing direction with respect to the base line Xn (FIG. 3) is determined. Further, "medium swing" is specified by pressing the key 14h of the cursor 12.

When data reading of one block is completed in this way, it is determined whether data reading of all blocks of the cause (pattern) has been completed or not based on the presence or absence of a completion command, that is, whether or not the key 14n of the cursor 12 has been pressed twice in succession. When the process is completed, the command input regarding the registration number (1 pattern number) for registering those data on the data disk is read, and the data processed with "PTIN ₁ " is stored in the system disk as pattern data.

Next, the input pattern display program "PTDIP" will be explained along the flow shown in FIG.

Continuing the pattern data stored by the pattern input correction program "PTIN ₁ " from the system disk, calculate the maximum values of the X and Y axes of that data.
Select XMAX, YMAX, and minimum values XMIN, YMIN. That is, in the flowcharts of Figs. 21 and 22, data in one pattern is first loaded, and the first point (X(1), Y(1)) of the first block is immediately set to XMAX=X(1). ), XMIN=X(1), YMAX=Y
(1), substitute YMIN=Y(1). Next, the next point in the first block (X(2), Y(2)) and XMAX, XMIM,
Compare the size with YMAX and YMIN, XMIN>X(2)
If XMIN=X(2), if XMAX<X(2) then XMAX=X
(2), YMIN＞Y(2), then YMIN＝Y(2), YMAX＜Y
If (2), set YMAX=Y(2). This comparison is repeated for successive points within the first block, and when the comparison is completed for all points within the first block, the data of the next block is read out and further comparison is performed. Then, when these comparisons are completed for all blocks, XMAX and XMIN indicate the maximum and minimum values of the X coordinate of data in all blocks in one pattern, respectively, and YMAX and YMIN indicate Y, respectively.
Indicates the maximum and minimum coordinate values. Therefore, LX=
Calculate the spread LX, LY of the data in the X and Y directions using XMAX−XMIN, LY=YMAX−YMIN, and MX
Calculate the center coordinates of the data using =XMIM+LX/2 and MY=XMIN+LY/2. Also, by setting the larger of LX and LY as LXY and scaling it in inverse proportion to the value of LXY, the pattern can be created at a constant scale regardless of the size of the original pattern.
Display on CRT.

When scaling is completed, the display routine for each block shown in FIGS. 23 and 24 is entered. In the flow shown in Figure 23, after reading one block of data and enlarging or reducing the scale of the data based on the SCL value, it is determined whether the first unit in one block is a straight line, an arc, or a circle. to judge. If the unit is a straight line, mark the start and end points and connect them with a straight line. In addition, if it is a circle or an arc, its starting point P ₁ = (X ₁ ,
Y ₁ ), midpoint P ₂ = (X ₂ , Y ₂ ), and end point P ₃ = (X ₃ , Y ₃ ), and calculate the center coordinates (X ₁ , Y ₀ ) and radius based on the flow in Figure 25. Calculate R. That is, the 23rd
In the flow shown in the figure, the straight line L ₁ passing through P ₁ and P ₂ :
(X- _X1 )( _Y2 - _Y1 )=(Y- _Y1 )( _X2 - _X1 ) and
Straight line L ₂ passing through P ₂ and P ₃ : (X - X ₂ ) (Y ₃ - Y ₂ ) = (Y
−Y ₂ ) (X ₃ −X ₂ ). At this time, L ₁ and L ₂ are parallel, that is, (Y ₂ − Y ₁ )/(X ₂ − X ₁ ) = (Y ₃ −
If Y ₂ )/(X ₃ −X ₂ ), the three points are on the same straight line, so a circle or arc cannot be formed, so the flow returns. In this case, it is necessary to re-enter the data for determining the circle or arc. Now,
If L ₁ and L ₂ are not parallel, a straight line L ₁ ′ passing through the midpoint of P ₁ and P ₂ and perpendicular to L ₁ : −[X−(X ₁ +X ₂ )/
2] (X ₂ - X ₁ ) = [Y - (Y ₁ + Y ₂ )/2] (Y ₂ - Y ₁ )
and _a straight line L 2 ′ that passes through the midpoint of P ₂ and P ₃ and is perpendicular to L ₂ :
−[X−(X ₂ +X ₂ )/2](X ₃ −X ₂ )=[Y−(Y ₂ +
Y ₃ )/2] (Y ₃ −Y ₂ ), and find the intersection (X ₀ , Y ₀ ) of L ₁ ′ and L ₂ ′ as follows.

Since this point of intersection (X ₀ , Y ₀ ) becomes the center coordinates of the circle or arc, the radius R is calculated by R=√( ₁ − ₀ ) ² +( ₀ − ₀ ) ² .

If the unit is a circle, a circle is immediately drawn based on the center coordinates (X ₀ , Y ₀ ) and radius R, but in the case of a circular arc, the direction angle is limited, so the direction angle is
Compute AG ₁ and AG ₂ . That is, AG ₁ = tan ^-1 [(Y ₁ - Y ₀ )/(X ₁ - X ₀ )] ₁ AG ₂ = tan ^-1 [(Y ₃ - Y ₀ )/(X ₃ - X ₀ )] Thus , draw an arc within the direction angles AG ₁ and AG ₂ .

As described above, the units in one block are displayed on the CRT one by one, and the count value N of the block counter is counted by "1" in connection with the completion of displaying one block according to the flow shown in Figure 24. At the same time, the count value N of the block counter is displayed near the block that has just been displayed. Next, divide this count value N by "6", and if the remainder S is 0, for example, a "purple" color code is generated, and if S=1, a "red" color code is generated. , if S=2, it will generate a "yellow" color code, if S=3, it will generate a "blue" color code, if S=4, it will generate a "edge" color code, and S =5, a "white" color code is generated. That is, the outline of each block is sequentially displayed in a different color on the CRT. When the display of all blocks is finished, the previously registered pattern number is displayed, and if a hard copy (PRINT) is required, it is copied and finished.

Next, the needle drop coordinate calculation output program "PTOUT" will be explained along the flowchart of FIG. 7. First, a pattern is read from the system disk, and the data contents of the data disk in which needle drop coordinate data to be described later are to be stored are checked to see if there is a write capacity. Next, it is determined whether data storage for all blocks has been completed, and if it has not been completed, the data for each block is read from the system disk, and the needle drop coordinate calculation routine (flow diagrams 26 to 29, Figure 35~
The process shown in FIG. 37) is performed.

As shown in the flowchart in Figure 26, there are four types of needle drop coordinate calculations: (i) embroidery with specified swing direction, (ii) mid-swing embroidery, (iii) pattern stitching, and (iv) jump. To determine whether to calculate the needle drop coordinates using the method, select the stitch type using the key 14l (embroidery), key 14k (pattern), or key 14m (jump) of the cursor 12 when reading one block of data.
The operation contents are determined according to the flowchart shown in FIG. 26, and each subroutine is selected.

(i) Embroidery with designated swing direction This will be explained using FIG. 30 based on the flowcharts of FIGS. 27 to 29. Starting point P ₁ of block B ₁ = (X
(1), Y(1)) and define a straight line L ₁ parallel to the swing direction. Now let L ₁ be aX+ with constants a, b, and c.
Let us write bY+c=0. Also, the constant c ₁
Straight line DL passing through point P ₁ and perpendicular to L ₁ with : −bX
+aY+c ₁ =0 is determined. Next, check the progress direction of the embroidery, for example, in Figure 30, the block
Since the data for B ₁ is above L ₁ , the embroidery will proceed upward. Next, a two-dimensional area (U(J), V(J)) for needle drop point coordinates is prepared. J
is the count value of the needle drop coordinate counter, which counts up by "1" every time one needle drop point is calculated. In the initial state, first set J=1, then set V(1)=X(1), U(1)=Y(1) and the first needle drop.
The coordinates of the starting point _P1 of block _B1 are stored in the point. Next, the straight line _L1 is translated upward by the needle entry pitch P input in the flowchart of Fig. 5, and the straight line _L2 : aX+bY≠+c-γ=0 (γ=
P√ ² + ² /b). Then, for example, the 28th
In the figure, straight line _L2 intersects unit _M1 and unit _M2 at one point.

For example, the count value K of the intersection counter is counted up by 1 when the above-mentioned straight line _L1 or _L2 intersects one unit, and it does not matter whether there is an intersection with the unit or not. Two straight lines (L ₁ = translated upward by (n-1)γ are Ln:aX+bY+C-(n-
1) Set λ=0), for example, make judgments sequentially from right to left in Fig. 30, and when this judgment is completed and Ln has been advanced upward by pitch P to Ln+1, the count value K is changed to `` Clear to 0.

The coordinates of the intersection of the unit and the straight line Ln are the 29th
Calculated according to the flow shown in the figure. First, if the unit is a straight line, let the coordinates of both ends of the unit be (X ₁ , Y ₁ ) and (X ₂ , Y ₂ ). Straight line Ln:
In order for aX+bY+c-(n-1)λ=0 to intersect with this unit, the points (X ₁ , Y ₁ ) and (X ₂ , Y ₂ )
It is necessary and sufficient for the two to be opposite to each other with the straight line Ln in between. That is, Z ₁ =aX ₁ +bY ₁ +c-(n-1)
When we set λ, Z ₂ = aX ₂ + bY ₂ + c-(n-1) λ, if Z ₁ Z ₂ > 0, there is a straight line with that unit.
It is assumed that there is no intersection with Ln, and if Z ₁ Z ₂ 0, there is an intersection and the process proceeds to the next intersection calculation. That is, the straight line passing through the points (X ₁ , Y ₁ ) and (X ₂ , Y ₂ ) is (X−
X ₁ )(Y ₂ −Y ₁ )=(Y−Y ₁ )(X ₂ −X ₁ ), which is
The intersection with Ln (xk+1, yk+1) is Since one intersection point has been calculated in this way, the count value K is incremented by "1" in the intersection point counter.

Then, if the unit is a circle or an arc,
The three points of the arc are (X ₁ , Y ₁ ) (X ₂ , Y ₂ ) (X ₃ , Y ₃ )
shall be. From these three points, the center coordinates (X ₀ , Y ₀ ) of the circle (arc) and the radius R of the circle (arc) are calculated based on the flow shown in FIG. Next, a straight line Lt perpendicular to Ln and passing through the point (X ₀ , X ₀ ): -b (X - X ₀ ) + a
(Y-Y ₀ )=0 is determined. Then, the intersection of Lt and Ln (XX, YY) is Calculated by the point (X ₀ , Y ₀ ) and point (XX, YY)
H1=√( ₀ −) ² + ( ₀ −) ²
Calculate by. Compare this H1 and the radius R, and if H1>R, the straight line Ln will cross the circle (arc) at a point farther from the center (X ₀ , Y ₀ ) than the radius R, so it is not a circle. do not intersect,
Therefore, there is no intersection. However, in the case of H1R, Ln and the circle intersect, so proceed to the next intersection point calculation. That is, Ln: aX+bY+C-(n-1)λ=0 Circle: (X-X ₀ ) ² + (Y-Y ₀ ) ² = R ² is solved simultaneously for X and Y to find the two intersection points P ₁
= (Xk+1, Yk+1) P ₂ = (Xk+2, Yk+
2) is obtained. (The specific calculation formula will be omitted as it will be complicated.) Now, if the unit is a circle, the calculated intersection
Since P ₁ and P ₂ always belong to a unit, the count value K of the intersection counter is counted up by "2". However, if the unit is an arc, the intersection
Since P ₁ and P ₂ may not belong to the unit, it is determined whether P ₁ and P ₂ belong to the unit as follows. That is, the direction angles AG ₁ , AG ₂ , AG ₃ from the center (X ₀ , Y 0 ) for the three points (X 1 , Y ₁ ), (X ₂ , Y ₂ ), (X ₃ , _{Y 3 )} of the _circular arc AG ₁ = tan ^-1 [(Y ₁ − Y ₀ ) / (X ₁ − X ₁ )] AG ₂ = tan ^-1 [(Y ₂ − Y ₀ ) / (X ₂ − X ₀ )] AS ₃ = Calculate by tan ^-1 [(Y ₃ − Y ₀ )/(X ₃ − X ₃ )], then calculate the direction angle of intersection P ₁ and P ₂
AG ₄ and AG ₅ as AG ₄ = tan ^-1 [(Yk+1-Y ₀ )/(Xk+1-
X ₀ )] AG ₅ = tan ^-1 [(Yk+2-Y ₀ )/(Xk+2-
X ₀ )], and AG ₁ <AG ₄ <AG ₂ or AG ₂ <
Only when AG ₄ <AG ₃ holds, P ₁ is regarded as the intersection of circular arcs and the count value K of the intersection counter is set to "1".
and then AG ₁ < AG ₅ < AG ₂
Or P ₂ only when AG ₂ < AG ₅ < AG ₃ holds.
is regarded as the intersection of the circular arcs, and the count value of the intersection counter is further incremented by "1".

When all the intersection points of each unit have been calculated for one straight line Ln, the following check is performed based on the flow shown in FIG. 28 in relation to the count value K of the intersection counter.

(1) K=0 In this case, since there is no intersection between the unit and the straight line Ln, it is checked whether the final point has been calculated, and if the final point has been calculated, the needle drop calculation for that block is completed. .

(2) K=1 In this case, the obtained intersection value (x ₁ ,
y ₁ ) as is, and the needle drop coordinates (U(J+1), V
(J+1) and increments the count value J of the needle drop coordinate counter by "1".

(3) K=2 There are three cases in which the number of intersections between the unit and the straight line Ln is 2, as shown in Figures 31A, 31B, and 31C.

In the case of Fig. 31A, since the straight line Ln intersects the connection point of the two units M ₁ and M ₂ ,
The straight line Ln intersects both of the two units M ₁ and M ₂ and is therefore regarded as an intersection point K=2. However, in reality, there are two intersection points (x ₁ ,
y ₁ ) and (x ₂ , y ₂ ) are the same, so x ₁ = x ₂ , y ₁
=y ₂ and K=1.

In the case of FIG. 31B, one straight line Ln intersects two different units M ₁ and M ₂ at mutually different points (x ₁ , y ₁ ) and (x ₂ , y ₂ ). At this time, the needle drop point (U
(J), V(J)) and the points (x ₁ , y ₁ ) and (x _{2 ,} y ₂ ), D ₁ =√( ₁ −(J)) ₂ ⁺ ( ₁ −(J)) ² D ₂ =√( ₂ −(J)) ² +( ₂ −(J)) ² Calculate each separately, and if D ₁ > D ₂ , set the point (x ₁ , y ₁ ). If D ₁ < D ₂ , select the point (x ₂ ,
y ₂ ), the coordinate value of the selected point is stored in (U(J+1), V(J+1)), and the count value J of the needle drop coordinate counter is counted up by "1".

In the case of Fig. 31C, unlike the above, two different intersection points (x ₁ , y ₁ ) and (x ₂ , y ₂ ) belong to one arc unit M ₄ , but the processing of these two points is performed in the 29th B. The process is carried out in the same way as in the figure, and the point farther from one needle entry point (U(J), V(J)) is moved to the next needle entry point (U(J+1), V(J)).
(J+1)) and increments the count value J of the needle drop coordinate counter by "1".

(4) K=3 As shown in Figure 32, the unit at one intersection
Across both M ₁ and M ₂ , (x ₁ , y ₂ ), (x ₂ , y ₂ )
This is the case when there is overlap. In this case, by setting x ₁ = x ₂ and y ₁ = y ₂ , the 31st
This results in the case of diagram B. If the result cannot be returned to the case shown in FIG. 31B, it is regarded as an error.

(5) K=4 As shown in Figure 33, one of the intersections is a unit.
(x _{1 , y 1 ,} (x ₂ , y _{2 ) overlaps both units M 1 and M 2} , and the other intersection point overlaps both units M ₃ and M ₄ (x ₃ , y ₃ ), (x ₄ ,
y ₄ ) is also an overlapping case, and x ₁ = x ₂ , y ₁
By setting =y ₂ and x ₃ =x ₄ and y ₃ =y ₄ , the case of FIG. 31B is obtained. If the 31st
If the result cannot be reduced to the case in Figure B, it is considered an error.

(6) K>4 In this embodiment, the maximum number of intersections K of one straight line Ln with a unit is "4", so if K becomes larger than "4", it is immediately regarded as an error.

In this way, when the flow returns from Fig. 28 to Fig. 27, the straight line Ln further moves upward by a pitch P to become Ln+1, and this time, the straight line Ln
For +1, the intersection with the unit is calculated based on the flow shown in FIG. 29, and the number K of the intersection points is checked based on the flow shown in FIG.

In particular, a typical case where K=2 as shown in FIG. 34 will be explained. In this case, the straight line Ln,
Ln+1 and Ln+2 each intersect with units M ₁ and M ₂ once, and the number of intersections between Ln, Ln+1 and Ln+2 and units M ₁ and M ₂ is six in total. However, not all of these intersection points are designated as needle drop points, and as shown in the flowchart of FIG. 28, only one needle drop point on one straight line Ln is selected as the needle drop point. Now, regarding straight line Ln, the right side (34th line) that intersects unit _M2
It is assumed that the needle drop point (U(J), V(J)) is selected as the needle drop point (U(J), V(J)). Then, the unit of Ln+1
Of the two intersections with M ₁ and M ₂ , the intersection on the unit M ₁ side is clearly farther from (U(J), V(J)) than the intersection on _{the unit M 2 side} .
The intersection of the sides is the next needle drop point (U(J+1), V
(J+1)). Similarly, Ln+2
and units M ₁ and M ₂ , the intersection on the unit M ₂ side is the needle drop point (U (J + 2), V
(J+2)). In this way, the needle drop point advances while reciprocating between the units M ₁ and M ₂ , resulting in an embroidery stitch in which the needle swing direction is approximately parallel to the straight line Ln.

(ii) Medium swing embroidery “Middle swing” refers to an embroidery stitch in which the needle swing direction changes radially from a certain center point, and the needle drop point is calculated based on the flow shown in Figure 35. That is, first, regarding the arc unit M ₁ outside the block in Fig. 37, its three points P ₁
= (X ₁ , Y ₁ ), P ₂ = (X ₂ , Y ₂ ), P ₃ = (X ₃ , Y ₃ ), the center of the arc (XX ₀ YY ₀ ) and the arc Calculate the radius R ₀ . Next, the direction angle AG ₁ of the starting point P ₁ = tan ^-1 [(Y ₁ − YY ₀ )/
(X ₁ −XX ₀ )] and the direction angle of the end point AG ₂ = tan ^-1
Calculate [(Y ₃ − YY ₁ )/(X ₃ − XX ₀ )] and calculate the angle AGP corresponding to 1 pitch from R ₀・AGP=P
Calculate AGP=P/R ₀ and find the angle cutoff value AGX.
Let's call it AG ₁ . Next, P ₁ = (X ₁ , Y ₁ ) is stored in the coordinates of the first stitch (U(1), V(1)), and the total angle PIO of arc unit M ₁ = |AG ₁ −AG ₂ | Calculate the total score I=PIO/AGP. Next, set the count value J of the stitch number counter to ``1'', and since U(1) = X <sub>1</sub> and V(1) = Y <sub>1</sub> have already been set, count up J by ``1'' and set AGX# Add AGP.

With the above settings, the needle drop point of J=1 belongs to the outer arc unit _M1 , so when J is an odd number, select the point on the unit _M1 side, and when J is an even number, select the point on the unit M1 side. By selecting a point on the unit _M2 side, the needle drop point will be on the unit M2 side.
The embroidery is sewn by going back and forth between _M1 and unit _M2 . Therefore, after counting up J by "1" and adding AGP to AGX, determine whether J is an even number or an odd number. If J is an odd number, the distance from the center point (XX0, YY0) to the needle drop point is determined. RR to R0
far. If J is an even number, it is determined whether the block is hollow. Not hollowed out means that the center point (X ₁ , Y ₁ ) is included within the block, as in the case of the circle in FIG. 38, for example. If hollowing is not possible, R=1
Let's say mm. As will be described later, this is equivalent to providing a circular hollow E with a radius of 1 mm in FIG. 39, for example. In addition, if it is hollow, there is another unit _M2 inside the arc unit _M1 , so the direction angle will pass through the point (XX0, YY0).
Straight line L _A of tanAGX: Y-Y ₀ = tan AGX (X-
Find the intersection of X ₀ ) and unit M ₂ . To do this, the equation of the straight line L _A is substituted for the equation of the straight line L ₁ in the flow of FIG. 29, and the coordinates (xk+1, yk+1) of the intersection point are calculated. Then, calculate R=√(+ _1-0 ) ² +(+ _1-0 ) ² .

Now, in the middle stitching, as is clear from FIG. 37, the stitch interval becomes narrower as it approaches the center coordinates (X ₀ , Y ₀ ), and clogging becomes more likely to occur. Therefore, as shown in FIG. 38, when the pitch P is small and when the inner unit M ₂ is close to the center coordinates (X ₁ , Y ₀ ), clogging is prevented as follows. That is, first, it is determined whether the set pitch P is larger than, for example, 0.4 mm, and if the pitch P is larger than 0.4 mm, it is assumed that no clogging will occur, and the following procedure is not performed and RR= Let's call it R. Pitzchi is 0.4
If it is smaller than mm, it is determined whether R is smaller than R ₀ /3, and if R is larger than R ₀ /3, the stitch density in the inner unit M ₂ (Fig. 38) is lower than that of the outer unit M ₁ . Assuming that it is not very high compared to , let us assume that RR=R. pitch 0.4mm
If R is smaller than R ₀ /3, J is 4.
Determine whether it is a multiple of 4, and if it is not a multiple of 4.
Set RR=R, and if J is a multiple of 4, set RR=1/3R ₀ . Then, using the RR calculated separately depending on the parity of J and whether it is a multiple of 4, the needle drops while counting up J by 1 using U(J) = XX0 + RR・cosAGX V(J) = YY0 + RR・sinAGX The coordinates (U(J), V(K)) of the point are calculated sequentially until J<1, and in relation to J>1, (U(J), V
The value of the coordinate point of (J)) = P ₃ = (X ₃ , Y ₃ ) is stored and the flow returns.

In other words, if the pitch is P0.4mm or R1/ _3R0 , it is assumed that no clogging occurs.
When J is an even number, set RR=R, so the needle swing direction is a radial direction centered on the point (X ₁ , Y ₁ ), and the needle drop point is the circular arc unit M when J is an odd number in Fig. 37. ₁ , and when J is an even number, it moves clockwise when it is on unit _M2 .

However, when pitch P < 0.4 mm and R < R ₀ /3, if J is an even number, if J is a multiple of 4, RR = 1/3R ₀ , and if J is a multiple of 4, RR = R Therefore, as shown in Fig. 38, half of the needle drop points that should be on unit _M2 are set outside R with respect to (X ₀ , Y ₀ ) by RR = R ₀ /3. Therefore, the density of the seams on unit _M2 is reduced by half and clogging is prevented. In the case of the circle in Fig. 39, the hollow E set around the center point (X ₀ , Y ₀ ) is
Similar processing is performed using unit _M2 in the figure.

(iii) Pattern sewing As described above, "pattern sewing" is to form stitches at a predetermined pitch P on the outline of the unit, and the needle drop coordinates are calculated based on the flow shown in FIG. In the flow, first, the count value J of the stitch number counter is reset to 0, and it is determined whether the unit in which a stitch is to be formed is a straight line or a circle (arc). Below, the case of a straight line and the case of a circular arc will be explained separately.

(1) Straight line Points at both ends of the unit (X ₁ , Y ₁ ), (X ₂ ,
Direction angle of the unit from Y ₂ ) AGX = tan ^-1
Calculate [ ⁽ _{Y 2 − Y 2} ) ^/ ₍ X _{2 −} Calculate = H/P yen.

Next, reset the count value JO of the individual stitch counter of the unit to "0" and set the needle drop point as U(J+1)=X ₁ +JO・P・cosAGX V(J+1)=Y ₁ +JO・P・sinAGX (U(J+1), V(J+
1)), and when this calculation is completed, count up JO and J by "1" and repeat the calculation of (U (J + 1), V (J + 1)) again. In this way, when JO becomes larger than the score I, U(J+1)=X ₂ , V(J+1)=Y ₂
(the final point of the unit), count up J by 1, and proceed to calculate the needle drop point of the next unit.

(2) Three points on the arc unit (X ₁ , Y ₁ ), (X ₂ , Y ₂ ),
From (X ₃ , Y ₃ ), calculate the center coordinates (X ₀ , Y ₀ ) and ^radius _R based on the flow _shown in FIG _. )/
(X ₁ −Y ₀ )], the final value of the angle AG ₂ = tan ^-1 [(Y ₃
−Y ₀ )/(X ₃ −X ₀ )〕Total angle AGT=｜AG ₂ −
AG ₁ |, and the angle AGP for 1 pitch =
Calculate P/R. Calculate the score I by I=AGT/AGP and reset the calculated value JO of the individual counter of the unit to "0", U (J + 1) = X ₀ + R・cos (AG ₁ + J ₀・AGP) V (J + 1) =Y ₀ +R・sin(AG ₁ +Jo・AGP) and the needle drop point (U(J+1), V(J+
1)) is calculated, and when this calculation is completed, JO and J are counted up by "1" and the calculation of (U(J+1), V(J+1)) is repeated again. In this way, when JO becomes larger than the score I, U(J+1)=X ₃ , V(J+1)=Y ₃
(final point) and count up J by "1". The count value J of the stitch number counter gives a sequential number of needle drop numbers across each unit within the -block.

The above calculation is completed for all units in one block, and the flow returns.

(iv) Jump Jump refers to the movement of the needle drop point from point P ₁ to point P ₂ without needle drop, as shown in Fig. 12C, and does not involve stitch formation.
In this embodiment, a jump is regarded as one block.

When the calculation of the needle drop coordinates is completed in this way, the needle drop coordinate storage flow shown in FIGS. 40, 41, and 42 is entered. The needle drop coordinate storage flow is used to give a specific hexadecimal command code specifying swing to the needle drop coordinate data and to convert the needle drop coordinate data into relative coordinates. What is converted into relative coordinates is that the data necessary for the drive source of the embroidery sewing machine is not the needle drop coordinate itself, but the distance traveled in the direction from the current needle drop coordinate to the next needle drop coordinate. It's for a reason.

In the flow, first it is determined whether the current data belongs to the first block, and if it is the first block, it immediately outputs the start code 7D and sets U0=U(1), V0=V(1). put.
If it is not the first block, a check is made for connections with the previous block based on the flow shown in FIG. That is, when the final point of the previous block is (U0, V0) and the current first point is (U(1), V(1)), the distance between the two points is L=√(0-(1)) ²
+(V0-V(1)) ² is calculated to determine the value of L,
If L=0, return immediately, and if L≠0, output "80" (command code to command the pattern) and stitch (U0, V0) and (U(1), V(1)) in a straight line. Tie it with

Next, based on the type of swing input using the keys 14a and 14n of the cursor 12, the swing direction of the "designated swing direction embroidery" is determined based on the base line Xn (third
If the angle is larger than 45 degrees with respect to the figure), it is assumed to be vertical embroidery and the command code "FF" is output.
If the swing direction is less than 45 degrees from the base line, it is considered horizontal embroidery and the command code is "FE".
If it is a "medium swing," it outputs the command code "7F," if it is a pattern, it outputs the command code "80," and if it is a jump, it outputs the command code "7E." When a command code is specified, the total number of stitches J in one block is read out, the count value JJ of a predetermined counter is reset to 1, and then JJ is counted up by "1". Using this JJ, all data within one block is converted into relative coordinates (UU, VV) as follows. That is, UU=U(JJ)−U0, VV=V
(JJ) − V0, in the initial state U0 = U(1), V0 = V(1)
Then, since JJ is counted up by one from "1", UU = U (2) - U (1), VV = V (2) - V
(1) Check whether either UU or VV exceeds the pitch P, and if both UU and VV are smaller than the pitch, convert the UU and VV values into binary codes and output them to the data disk. If one of UU or VV is pitch P
If it is larger than , it corresponds to some kind of data calculation error and is considered an error. After that, generally the coordinates of the JJ-th needle drop point (U(JJ), V
(JJ)), U0=U(JJ), V(0)=
Set it as V(JJ), count up JJ by 1, and get UU=U(JJ+1)-U(JJ), VV=V
By calculating (JJ+1)-V(JJ), the JJ-th relative coordinates (UU, VV) are output to the data disk. In this way, JJ is counted up by "1", and all the needle drop point coordinates of the blocks where JJ>J are converted to relative coordinates, and the storage to the data disk is completed, so the directory section write flow shown in Figure 43 The pattern number, each track number, etc. are written in the directory section of the data disk.

The present invention has the above-described configuration, and next, the case of inputting a pattern will be explained based on a specific example. Assume that an original sheet of paper is placed on the tablet 11 and, for example, an alphanumeric character "B" and an exclamation mark "!" are read. First, "B" is divided into six blocks as shown in FIG. In FIGS. 44 to 53, only blocks that have already been read are shown, and blocks that have been read are sequentially added to them.

Now, after specifying a new input by operating the operating means 19 and setting the scale to 1x by pressing, for example, the key 14b of the cursor 12, in _FIG .
3a and press the key 14a, then match the mark 13a with _{the 2} points S and press the key 14a to specify the base line Xn connecting _{the 2} points S ₁ and S. Next, the coordinate transformation coefficient calculation routine ( 10), the inclination θ of the base line Xn with respect to the X axis of the tablet 11 is calculated.

Next, in FIG. 44, after pressing the key 14l of the cursor 12 to specify "embroidery stitch", point P ₁ at the lower left corner of the first block of the alphabet "B" is pressed.
Match the mark 13a of the cursor 12 to the next point P ₂
Since the path up to P 2 is a straight line, press the key 14b corresponding to the input of "straight line", then align the mark 13a with point P ₂ and press the key 14b, thereby P ₁ , P ₂
Reading between ends. Furthermore, P ₂ −
By aligning marks 13a with P ₃ -P ₄ -P ₅ -P ₆ -P ₇ and pressing the key 14b separately, and pressing the key 14n to instruct the end of the block at the final point P ₈ of the first block, Finish reading the first block of data. Next, align mark 13a of cursor 12 with point Q1 on tablet ₁₁ and press key 14a.
Next, match mark 13a with Q ₂ points and press key 14a.
By pressing , the swing direction is specified in the Q ₁ - Q ₂ direction (horizontal direction). Thereafter, by pressing the numeric key of the cursor 12, for example, the key 14c, the swing pitch "P=0.2 mm" is set.

Regarding the second block in FIG. 45, first, the key 14l of the cursor 12 is pressed to specify "embroidery stitching". The second block, like the first block, consists only of linear units, so it is sufficient to read the points P ₁ -P ₂ -P ₃ -P ₄ -P ₅ sequentially in the same way as in the case of the first block. When reading is completed, align the mark 13a of the cursor 12 with point _Q1 and press the key 14a, then align the mark 13a with point _Q2 and press the key 14a to move in the _Q1 - _Q2 direction (vertical direction). ) specifies the swing direction. Thereafter, by pressing, for example, the key 14b of the cursor 12, the swing pitch "P=0.1 mm" is set.

Regarding the third block in FIG. 44, first, the key 14l of the cursor 12 is pressed to specify "embroidery stitching". The third block is P ₁ −P ₂ −P ₃ and P ₄ −P ₅ −
Since P ₆ is an arc unit, first mark 1 of cursor 12
3a to point _P1 and press key 14c to specify "arc". Then, in the data check routine of FIG. 13, the count value of the "arc point number" counter becomes "1". If you accidentally press the key 14b specifying "straight line" at point _P2 , the count value of the "number of straight lines" counter will be incremented while the number of arc points is "1", so the flowchart shown in Fig. 13 will be incremented. An error is determined, and this error is notified by a buzzer. Here, when the key 14j of the cursor 12 is pressed, the data inputted in relation to point _P2 is erased according to the flow shown in FIG. 11, and the buzzer stops. So again mark 1 of cursor 12 at point P ₂
3a and then press the key 14c to specify "arc". Next, mark 1 of cursor 12 at point P ₃
3a, and since there is a straight line between the next point _P4 and point _P3 , press the key 14b to specify "straight line". In this way, a circular arc is determined by the three points P ₁ , P ₂ , and P ₃ . Next, at points P ₄ and P ₅ , the mark 13a of the cursor 12 is aligned and the key 14c for specifying "arc" is pressed separately. At the final point _P6 , press the key 14n to specify "end", and the point _P4 ,
The arc is determined by the three points P ₅ and P ₆ , and
Data reading of the third block is completed. So, if you press key 14h and instruct "medium swing",
"Medium swing" which is radial with respect to the center point of the arcs P ₁ , P ₂ and P ₃ is specified, and then, by pressing, for example, key 14e of the numeric keys, the pitch "P=0.4 mm" is set.

Thereafter, data is read for the fourth and sixth blocks in FIGS. 47 and 49 in the same manner as the first and second blocks, and data is read for the fifth block in FIG. 48 in the same manner as the third block.
In addition, for the 4th and 6th blocks, specify the swing in the vertical direction,
For the fifth block, specify "medium swing".

Now, the final block, the 6th block (4th block)
After reading the data in Figure 9), move the mark 13a of the cursor 12 to the final point _P5 of the 6th block in order to move the needle drop point in advance for the next embroidery pattern.
Key 14m to match and specify "jump"
, and then align mark 13a with point Q ₃ , which is spaced to _the right from point P ₅ , and press key 14n twice to instruct the end _of one pattern reading. At the same time that "jump" is read, reading of one pattern "B" is completed. A pattern number is determined for the read pattern "B" data by key operations on the operating means 19, and the pattern data is stored in the system disk.

Next, the pattern data is read out, the maximum value in the X direction, the maximum value in the Y direction, the minimum value in the X direction, and the minimum value in the Y direction of pattern "B" are respectively selected, and a coordinate conversion coefficient calculation routine is performed on the CRT of the display means 17.
The scale of the figure to be displayed on the display unit is determined, and the first block is set to "red" based on the flow shown in FIG.
The second block is "yellow", the third block is "blue", the fourth block is "green", the fifth block is "white", and the sixth block is "white".
The block is colored “purple” and the 7th block “jump” is colored “red” again.
Displayed on CRT.

The data regarding this displayed pattern “B” is “PTOUT” (Figs. 25 to 28, 35 and 36).
40 to 42), needle drop coordinate calculation, needle drop coordinate storage, and directory section write processing are performed and stored in the data disk.

Next, reading the exclamation mark "!" will be explained. The exclamation mark "!" is divided into two blocks according to its pattern.

Now, by operating the operating means 19, a new input is designated again. Here, as in the case of pattern "B", after setting the scale to 1x by pressing the key 14b of the cursor 12, align the mark 13a of the cursor 12 with the _S1 point on the tablet 11 and press the key 14a. Next, by aligning the mark 13a with S ₂ and pressing the key 14a, the base line Xn connecting the _two points S ₁ and S is specified, and the coordinate conversion coefficient calculation routine (Fig. 10) The slope of the baseline Xn is calculated.

Next, in FIG. 50, after pressing the key 14k of the cursor 12 which instructs "pattern sewing", point P ₁ is pressed.
Align the mark 13a of the cursor 12 with "Straight line"
Press key 14b to instruct Q1, then mark 1 at point _Q1.
Key 14n to match 3a and instruct "end"
Press. In this way, points P ₁ and Q ₁ are connected with straight pattern stitches. I did this by moving the upper end point P ₁ of the pattern sewing block to the block B ₁ above the "!"
By specifying the first point P ₁ in (Figure 51),
This is so that the embroidery progresses from top to bottom in the upper block _B1 .

Next, in FIG. 51, key 1 of cursor 12
Press 4l and specify "embroidery stitch". and,
Block the starting point P ₁ of the pattern sewing block in Figure 50.
Set the starting point of B ₁ , align the mark 13a of the cursor 12 with points P ₁ and P ₂ in Figure 51, press the key 14c to specify "arc" for each, and specify "straight line" at point P ₃ . By pressing the key 14b, the points P ₁ , P ₂ , P ₃
The arc is determined by Next, press the keys 14b individually while sequentially aligning the points P ₄ -P ₅ -P ₆ -P ₇ with the mark 13a, and press the key 14c while sequentially aligning the points _P8 and _P9 with the mark 13a. When the key 14n instructing "end" is pressed at point _P10 , which almost coincides with point _P1 , an arc is determined at points _P8 , _P9 , and _P10 , and reading of block _B1 is completed. Therefore, in FIG. 51, align mark 13a of cursor 12 with point Q ₁ and press key 14a, then move mark 1 to point Q ₂ .
By matching keys 3a and pressing the key 14a, the pressing direction is specified in the Q ₁ -Q ₂ direction (horizontal direction).
Thereafter, by pressing, for example, the key 14d of the cursor 12, the swing pitch "P=0.3 mm" is set.

Next, in FIG. 52, point P ₁₀ of block B ₁
Align mark 13a of cursor 12 with
Align the mark 13a with the starting point _P1 of _B2 and press the key 14n to instruct "end". In this way, the needle drop point moves from _P10 to _P1 . After setting the embroidery stitch by pressing the key 14l, press the key 14d for specifying "circle" while aligning the mark 13a of the cursor 12 with the points _P1 and _P2 in sequence, and press the key 14d to specify "circle" at the point _P3 .
By pressing n, a circle is determined by points P ₁ , P ₂ and P ₃ and reading of block B ₂ is completed. Then, press key 14h to instruct "medium swing", then press key 14c to select pitch "P=
0.2mm”. After reading the data, in order to move the needle drop point in advance for the next embroidery pattern, align the mark 13a of the cursor 12 with the final point _P3 of the _B2 block and press the key 14m to specify "Jump". When the key 14n is pressed twice, the mark 13a is aligned with the point _Q1 separated from the point _P5 to instruct the _end of reading one pattern _. ” is read, and the reading of one pattern “!” is completed.

As in the case of pattern "B", the data read in this way is subdivided through the input pattern display routine and needle drop coordinate calculation routine and stored on the data disk.

The embroidery stitches of the alphabet "B" and the exclamation mark "!" thus input are as shown in FIG.

In this embodiment, the embroidery frame 6 is supported by the support frame 5, and the support frame is moved by the actuating means. However, the embroidery frame may be moved by being connected to the actuating means. good.

In addition, in this embodiment, a structure in which the support frame is moved in the X and Y directions according to the data on the data disk is shown, but the needles are moved in a zigzag manner in the horizontal direction by control of a servo motor, a stepping motor, etc. A sewing machine may be arranged, and the movement of the support frame and the swinging of the needle may be controlled simultaneously with the data on the data disk.

Furthermore, although six colors are used in this embodiment, more or fewer colors may be used.

As described above, according to the present invention, a design to be embroidered is divided into a plurality of consecutive blocks, the outline of each block is converted into positional coordinates, each block is sequentially read, and the design is executed based on the read positional coordinates. Then, the outline of each block is sequentially displayed in a different color, and
Since the needle drop data is calculated to set the needle drop point on the contour line so that an embroidery stitch is formed within each contour line, blocks can be easily identified. You can check for overlaps before sewing, which has the effect of significantly improving work efficiency.

[Brief explanation of the drawing]

1 is a perspective view of an embroidery sewing machine, a tablet, and a display device, FIG. 2 is a front view of a cursor for data input, FIG. 3A is a diagram showing the relationship between the coordinates of the tablet and a baseline, FIG. 4 is a general flowchart of data processing by the control means of the present invention, FIG. 5 is a flowchart of data input and checking, and FIG. 6 is a diagram of dividing the pattern into blocks.
The figure is a data display flowchart, Figure 7 is a flowchart for calculating the needle drop point from the data and storing it in the data disk, Figures 8 and 9 are sewing machine control flowcharts, and Figure 10 is the drawing magnification rate (scale). ), Fig. 11 is a flowchart for reading data in one block, Fig. 12A is a diagram of pattern sewing, Fig. 12
Figure B is a diagram of embroidery stitching, Figure 12C is a diagram of a jump, Figure 13 is a flowchart of a data check in one block, Figures 14 to 19 are diagrams showing specific examples of data checks, and Figure 20 is a diagram of a unit. Flowchart for adding configuration data, Figures 21 and 22 are flowcharts for calculating the maximum and minimum coordinates of one pattern, Figure 23 is a flowchart for calculating display coordinates on a CRT, and Figure 24 is for each block. Flowchart for giving different color display codes, Fig. 25 is a flowchart for calculating the center coordinates and radius of a circle or arc, Fig. 26 is a flowchart for specifying the type of swing, Fig. 27.
Figure 28 is a flowchart for calculating the needle drop point when specifying the swing direction, and Figure 29 is a flowchart for calculating the needle drop point when specifying the swing direction.
Flowchart for calculating the coordinates of the intersection with Ln,
Figure 30 is an explanatory diagram of specifying the needle drop point in specifying the swing direction, Figures 31A to 31C are diagrams showing the positional relationship when the intersection of the straight line Ln and each unit is "2", and Figure 32 is a straight line An explanatory diagram when the intersection of Ln and each unit is "3", Figure 33 is a straight line
An explanatory diagram when the intersection point between Ln and each unit is "4", Fig. 34 is an explanatory diagram of the state in which the needle drop coordinate is selected from the intersection points of each unit, and Figs. 35 and 36
The figure is a flowchart for calculating the needle drop point in the middle swing, Figure 37 is an explanatory diagram for specifying the needle drop point in the middle swing, Figure 38 is a diagram showing the stitches for preventing clogging in the middle swing, and Figure 39 The figure is a diagram of the middle swing in a circle, Figure 40 is a flowchart for calculating pattern stitches, Figures 41 and 42 are flowcharts for storing needle drop coordinates in a data disk, and Figure 43 is a directory part added to data. Figures 44 to 49 are flowcharts for reading pattern "B", and Figures 50 to 52 are for pattern "!"
Figure 53 shows the reading state of pattern "B".
It is a diagram of the embroidery stitches of “!” and “!”.

Claims (1)

[Scope of Claims] 1. An original drawing depicting a pattern to be embroidered, reading means 11 and 12 capable of converting and reading a plurality of points on the outline of the pattern into positional coordinates and generating data signals, and operations. Each time a predetermined signal is generated by a user's operation, a plurality of blocks are set by an assumed contour line connecting position coordinates based on the data signal generated during that time, and a signal is generated representing the assumed contour line for each block. and a display means 1 having a CRT display section for displaying images.
6, means for continuously displaying the assumed contour line on a CRT display section based on a signal representing the assumed contour line, and controlling the color to change sequentially to a predetermined different color for each block, based on the data signal; a calculation means (PTOUT) for calculating needle drop data for setting needle drop points on contour lines so as to form embroidery stitches within each assumed contour line;