JPS6142593B2 - - Google Patents

Description

Detailed Description of the Invention The present invention provides an embroidery sewing machine that alternately sets needle drop points at equal intervals on the contour line of the inner and outer circumferences so as to form embroidery stitches within the contour line with the inner and outer circumferences being concentric circles. This invention relates to a needle drop control method when the ratio of the diameter of the inner circumference to the outer circumference is smaller than a predetermined value and the needle drop interval on the inner circumference is shorter than a predetermined length.

Conventionally, when embroidery is sewn using a sewing machine such as the one described above so that the needle drops are alternately placed on the contour lines of the inner and outer peripheries, the needle drop points become densely packed and form a dumpling when the diameter of the inner periphery is small. This resulted in the disadvantage that the quality of finished stitching deteriorated significantly due to clogging, etc.

The present invention aims to eliminate the above-mentioned conventional drawbacks.

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. (not), the upper surface 1a can be moved in a composite direction of the X direction along the axial direction of the main shaft of the sewing machine and the Y direction along the intersecting direction with 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 denotes 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 data for writing data to be read into the floppy reading means 7. It has an insertion part 18b that allows a floppy disk (data disk) to be attached or removed, a floppy control means 18 for writing to or reading from each floppy disk, an operation means 19 having a plurality of keys, and ROM, RAM. , a CPU (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, the graphic input correction program "PTIN1" is read from the system disk, the processed data of "PTIN1" is written to the system disk when inputting, and the processed data once written is read from the system disk when making corrections. and make the corrections.
Rewrite the process data to the system disk again. After processing "PTIN1", 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-mentioned processed data from the system disk is read based on the "PTDIP". to the display means 17
Display on CRT. After processing "PTDIP" or when there is no display command, it is determined whether or not there is a modification, and when modification is performed, the modified processing data is rewritten based on the program "PTIN1" 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 (PTIN1) will be further explained with reference to the flowchart in FIG. Determine whether the data to be read is new input or modification,
In the case of a new drawing, 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 magnification is entered using the numeric keys "1" to "9" of the cursor 12. For example, when "4" is entered, the scale is 1/4 compared to when "1" is entered.
Double. 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, mark 1 of cursor 12
By aligning 3a with the (Xa, Ya) point of the absolute coordinates and pressing the key 14a, first read the coordinates of the (Xa, Ya) point, and then read the coordinates of the (Xb, Yb) point away from the (Xa, Ya) point. By pressing the key 14a, the coordinates of the point (Xb, Yb) are read. From these,
Distance in the X-axis direction LX = Xb - Xa and distance in the y-axis direction
LY=Yb−Ya is calculated, followed by LXY=√(−
Xa) ² (Yb−Ya) ² is calculated and cosθ=LX/
LXY, sin θ=LY/LXY is determined, and from now on, the base line tilted θ with respect to the absolute coordinate X will be the X axis. This baseline Xn and absolute coordinates (X, Y) are Xn=Xcosθ
The relationship is −Ysinθ. Thus the coordinate transformation coefficient
Once cos θ and sin θ are determined, data reading operation is started 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 the count is up.
Next, it is determined whether "all points have been completed", that is, whether reading of the block has been completed. “14n” at cursor 12
The end of reading the block is determined when the key is pressed. 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. When key 14j is pressed, the data for all points within the block is cleared and the data must be reread from the beginning. If the key 14j is not pressed, it is determined that there is a "previous point input error". A "previous point input error" is a case where the data that has just been input is incorrect and the operator presses the key 14i of the cursor 12 to correct the data. When the key 14i is pressed, the count value P of the point count counts down by ``2'' and then counts up by ``1'', so that the previous data is cleared and it becomes possible to read the correct data there. Key 14j and key 14i
When neither is pressed, the "straight line", "circle", or "arc" reading operation shown below immediately begins.

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. Then, 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.
Count up the counter 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 be "2". Become. At this time, mark 13
When you put a on point P ₃ and press key 14b, points P ₁ ,
Since one arc is determined by P ₂ and P ₃ , the count value of the "Number of arcs" counter increases by "1", and since the determination of one arc is completed, the "Number of arc points" counter increases by "1". Cleared to "0". In this case, it is normal, so the 13th
The flow check function in the diagram does not work. However, when the "arc point number" counter is "1" _, that is, when P ₁ is input, as shown in FIG. If you press , the arc cannot be determined using P ₁ and P ₂ , so a buzzer sounds and a data entry error is reported. In this case, it is necessary to correct the data by pressing the key 14j or the key 14y of the cursor 12 according to the flow shown in FIG. Also, in Figure 16, the point
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 points P ₁ , P ₂ , and P ₃ , and the count value of the "Number of arcs" counter becomes "1" is counted up in the same way as above, but point P ₃ is considered to be the final point of the arc and the starting point of the next arc, and the count value of the "Number of arcs" counter is not "0" but "1" and is not an error. Also, in FIG. 17, points P ₁ , P ₂ ,
When both keys 14d are pressed at P ₃ , the count value of the yen point number counter becomes "3", and since a circle is determined by points P ₁ , P ₂ , and P ₃ , the count value of the "yen number" counter becomes "3". 1” is counted up. So, if you align the mark 13a of the cursor 12 with the point _P4 in the circle and press the key 14d, the count value of the "Number of circle points" counter will be counted up by "1" and become "4". In this example, the 18th
As shown in the figure, a circle passing through point _P4 and concentric with points _P1 , _P2 , and _P3 is formed, so this is not considered an error. However, 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 P-1 immediately before the final point P is "2", then at the final point P, the input is made using the key 14n of the cursor 12. The circular arc is completed using the data at the point P-2 and the three data at points P-2 and P-1 to complete one circular arc, and the count value of the "number of circular arcs" counter is counted up by "1". However, if the "arc point number" counter is "1" at point P-1, it will be impossible to complete the arc at the final point P, so a buzzer will sound to notify an error.

Figure 20 shows how the point data input in Figures 11 and 12 is divided into multiple units of straight lines, circular arcs, or circles, and configuration data used in calculating the needle drop point described later is given to each unit. This is the flow for 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 shown in 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 ``72'' for a circle. D(X, 2)
is the number of the starting point of the unit (the third
(see Figure B), 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 conveniently set to "-1".
give. 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+
Return to 1=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,
Return D(X,4)=-1+2=1 and -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 indication", 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 original pattern (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 (pattern number) when registering those data on the data disk is read, and the data processed with "PTIN1" is stored in the system disk as pattern data.

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

Read the pattern data stored by the pattern input correction program "PTIN1" from the system disk, and 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 flows shown in Figures 21 and 22, first load the data in one pattern, then use the first point (X(1), Y(1)) of the first block to immediately calculate XMAX=X(1). ), XMIN=X
Substitute (1), YMAX=Y(1), YMIN=Y(Y1). Next, the next point in the first block (X
(2), Y(2) and XMAX, XMIN, YMAX,
Compare the size with YMIN, and if XMIN>X(2)
If XMIN=X(2), XMAX<X(2) then XMAX
If =X(2)YMIN>Y(2) then YMIN=Y
(2), if YMAX<Y(2) then YMAX=Y(2)
far. 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,
XMIN indicates the maximum and minimum values of the X coordinate of data in all blocks in one pattern, respectively.
YMAX and YMIN indicate the maximum value and minimum value of the Y coordinate, respectively. Therefore, LX=XMAX−XMIN, LY=
Calculate the spread LX, LY of the data in the X and Y directions using YMAX−YMIN, MX=XMIN+LX/2, MY
Calculate the center coordinates of the data using =XMIN+LY/2. Further, by setting the larger of LX and LY as LXY and scaling in inverse proportion to the value of LXY, the pattern is displayed on the CRT at a constant scale regardless of the size of the original pattern.

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 based on the flow in Figure 25, center coordinates (X ₀ , Y ₀ ) and radius are plotted. 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 ₃ )/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 intersection (X ₀ , Y ₀ ) is the center coordinate 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 "green" 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 and 35) to be described next is performed. ~37
Process the diagram.

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 cursor 12's key 14 (embroidery), key 14k (pattern), or key 14m (jump) 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) Swing direction specified embroidery This will be explained using FIG. 30 based on the flow of FIGS. 27 to 29. Starting point P ₁ of block B ₁ = (X
(1), a straight line L ₁ passing through Y(1) and parallel to the swing direction
Establish. Now L ₁ is aX+ with constants a, b, c
Let us write bY+c=0. Also, a straight line DL passing through point P _{1 and} perpendicular to L ₁ with constant c 1: −bX + aY
+c ₁ =0 is determined. Next, check the direction in which the embroidery will proceed. For example, in FIG. 30, the data of block _B1 is above _L1 , so 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 and then set V(1)
=X(1), U(1)=Y(1), and the coordinates of the starting point _P1 of block _B1 are stored at the first point of the needle drop. Next, the straight line L ₁ is translated upward by the needle drop pitch P input in the flow shown in Figure 5, and the straight line L ₂ : aX + bY + c - λ = 0 (λ = P√ ² + ² /
b). For example, in FIG. 28, straight line _L2 intersects unit _M1 and unit _M2 at one point.

For example, the count value K of the intersection counter is incremented by 1 every time 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. For example, sequentially from right to left in Figure 30 on one straight line (Ln:aX+bY+C-(n-1)λ=0 when L ₁ is translated upward by (n-1)λ) After making a judgment, when this judgment is completed, change Ln to Ln+
1 and the count value K is cleared to "0" at the point when it has advanced by a pitch P upwards.

The coordinates of the intersection of the unit and the straight line Ln are calculated according to the flow shown in FIG. First, if the unit is a straight line, let the coordinates of both ends of the unit be (X ₁ , Y ₁ ), (X ₂ Y ₂ ). Straight line Ln: aX+bY+
In order for c-(n-1)λ=0 to intersect with this unit, it is necessary and sufficient that the points (X ₁ , Y ₁ ) and (X ₂ , Y ₂ ) face each other across the straight line Ln. That is, Z ₁ =
aX ₁ +bY ₁ +c-(n-1)λ,Z ₂ =aX ₂ +bY ₂ +c
-(n-1)λ, if Z ₁ Z ₂ > 0, then
Assuming that there is no intersection between that unit and the straight line Ln,
If Z ₁ Z ₂ is 0, it is assumed that 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 ), the intersection of this and Ln (xk+1, yk+1)
teeth, Since one intersection point has been calculated in this way, the count value K of the intersection point counter is counted up by "1".

Next, if the unit is a circle or an arc, let the three points of the arc be (X ₁ , Y ₁ ) (X ₂ , Y ₂ (X ₃ , Y ₃ ). From these three points, proceed to the flow shown in Figure 25. Based on this, calculate the center coordinates (X ₀ , Y ₀ ) of the circle (arc) and the radius R of the circle (arc).Next, calculate the point (X 0 , Y ₀ ) perpendicular to Ln.
Straight line Lt passing through Y ₀ ): -b(X-X ₀ )+a(Y-
Y ₀ )=0 is determined. Then, the intersection of Lt and Ln (XX, YY) is Calculate the distance H1 between the point (X ₀ , Y ₀ ) and the point (XX, YY) as H1=√( ₀ −) ² + ( ₀ −) ²
Calculate by. Compare this H1 and the radius R, and
If 1>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 will not intersect with the circle, and therefore there will be no intersection. . However, if it is 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 Solve ² simultaneously for X and Y and find the two intersections P ₁ =
(Xk+1, Yk+1)P ₂ =(Xk+2, Yk+2) is obtained. (The specific calculation formula is omitted as it is complicated.) Now, if the unit is a circle, the calculated intersection P ₁ ,
Since _P2 always belongs to a unit, the count value K of the intersection counter is counted up by "2". However, if the unit is a circular arc, the intersections P ₁ and P ₂ may not belong to the unit, so whether or not P ₁ and P ₂ belong to the unit is determined as follows. That is, the three points of the circular arc (X ₁ , Y ₁ ), (X ₂ ,
The direction angles AG ₁ , AG ₂ , AG ₃ from the center (X ₀ , Y ₀ ) for Y _{2 ), (X 3 ,} Y ₃ ) are calculated as AG ₁ = tan ^-1 [(Y ₁ − Y ₀ )/(X ₁ −X ₀ )] AG ₂ = tan ^-1 [(Y ₂ − Y ₀ )/(X ₂ − X ₀ )] AG ₃ = tan ^-1 [(Y ₃ − Y ₀ )/(X ₃ − X ₀ )], and then calculate the direction angles AG ₄ and AG ₅ of the intersection points P ₁ and P ₂ as AG ₄ = tan ^-1 [(Yk+1-Y ₀ )/Xk+1-X ₀ )] AG ₅ = tan ^-1 Calculated by [(Yk+2-Y ₀ )/Xk+2-X ₀ )], AG ₁ < AG ₄ < AG ₂ or AG ₂ < AG ₄
Only when <AG ₃ holds, P ₁ is regarded as the intersection of the arcs, the count value K of the intersection counter is counted up by "1", and then AG ₁ <AG ₅ <AG ₂ or AG ₂ <
Only when AG ₅ <AG ₃ holds, P ₂ 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, check whether the final point has been calculated. If the final point has been calculated, the calculation of the needle drop point for that block is completed. do.

(2) K=1 In this case, the obtained intersection value (x ₁ , y ₁ ) is directly converted into needle drop coordinates (U(J+1), V(J+
1) and calculate the count value J of the needle drop coordinate counter.
Count down 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 Figure 31A, the straight line Ln has two units.
Since it intersects the connecting point of 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 the intersection point K=2. However, since the two intersections (x ₁ , y ₁ ) and (x ₂ , y ₂ ) are actually the same, the result is a case where 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 different points (x ₁ , y ₁ ) and (x ₂ , y ₂ ). At this time, the needle drop point (U(J), V(J)) specified as the final needle drop coordinate among the intersections of each unit with the straight line Ln-1, which is lowered by P than the straight line Ln, and the point The distances D ₁ and D ₂ from (x ₁ , y ₁ ) and (x ₂ , y ₂ ) are D ₁ =√( ₁ − ()) ² + ( ₁ − ()) ² D ₂ =√( ₂ − ()) ² + ₂ - ()) ² , and if D ₁ > D ₂ , the point (x ₁ ,
y ₁ ), and if D ₁ < D ₂ , select the point (x ₂ , y ₂ ), and set the coordinates of the selected point to (U(J+1),
V(J+1)) and increments the count value J of the needle drop coordinate counter 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 point.
This is done in the same way as in the case of figure B, and the point farther from the previous needle drop point (U(J), V(J)) is set to the next needle drop point (U(J+1), V(J+1). )) and increments the count value J of the needle drop coordinate counter by "1".

(4) K=3 As shown in Figure 32, one of the intersections is a unit.
This is a case where (x ₁ , y ₁ ) and (x ₂ , y ₂ ) overlap in both M ₁ and M ₂ . In this case x ₁ =
By setting x ₂ , y ₁ =y ₂ , the case of FIG. 31B is obtained. 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 ) overlap both M 1 and M ₂ , and the other intersection point is the unit M ₃ ,
This is a case where (x ₃ , y ₁ ) and (x ₄ , y ₄ ) are also overlapped across both M ₄ , and x ₁ = x ₂ , y ₁ = y ₂ and x ₃ = x ₄ , y ₃
By setting = y ₄ , the case of FIG. 31B is obtained. If the result cannot be returned to the case shown in FIG. 31B, it is regarded as 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.Then, the intersection point of this straight line Ln+1 with the unit is calculated based on the flow of Fig. 29, and its The number K of intersections 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 lines Ln, Ln+
1, Ln+2 intersect with units M ₁ and M ₂ once each, and LnLn+1, Ln+2 and units M ₁ ,
Intersection with M ₂ or 6 pieces in total. However, not all of these intersection points can be designated as needle drop points, and as shown in the flowchart of FIG. 28, only one point on one straight line Ln is selected as the needle drop point. Now, for the straight line Ln, unit M ₂
The needle drop point (U
(J), V(J)) is selected. Then, of the two intersections of Ln+1 with units 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 on the unit _M1 side is selected as the next needle drop point (U(J+1), V(J+1)). Similarly, at the intersection of Ln+2 and units M ₁ and M ₂ , the intersection on the unit M ₂ side is selected as 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 ), calculate the center of the arc (XX ₀ , YY ₀ ) and the radius R ₀ of the arc based on the flow in Figure 25. do. Next, the direction angle of the starting point P ₁
AG ₁ = tan ^-1 [(Y ₁ − YY ₀ )/(X ₁ − XX ₀ )] and the direction angle of the end point AG ₂ = tan ^-1 [(Y _{3 −} YY ₀ )/(X ₃ −
XX ₀ )] and calculate the angle AGP corresponding to 1 pitch.
is calculated from R ₀ ×AGP=P as AGP=P/R ₀ ,
Let the initial value of the angle AGX be AG ₁ . Then, P ₁ =
(X ₁ , Y ₁ ) as the coordinates of the first stitch (U(1), V
(1)), the entire angle of the arc unit _M1
Calculate PIO=1, AG ₁ −AG ₂ 1, total score I=
Request PIO/AGP. Next, the count value J of the stitch number counter is set to "1", and already U(1)=X ₁ , V
(1) = Y ₁ , so count up J by 1 and add AGP to AGX.

With the above settings, the needle drop point of J=1 will belong 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. If the point on the unit _M2 side is selected, the needle drop point will move back and forth between unit _M1 and unit _M2 to perform embroidery stitches. So, count up J by "1" and set it to AGX.
After adding AGP, determine whether J is even or odd, and if J is odd, set the distance RR from the center point (XX0, YY0) to the needle drop point as R0. If J is an even number, it is determined whether the block is hollow. Not hollowed out means that the center point (X ₀ , Y ₀ ) is included within the block, as in the case of the circle in FIG. 38, for example. If it is not possible to hollow out, set R = 1mm. 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 the unit is hollow, there is another unit _M2 inside the arc unit _M1 .
exists, so the direction angle passing through the point (XX0, YY0)
Straight line L _A of tanAGX: Y-Y ₀ = tanAGX (X-X ₀ )
Find the intersection of and unit _M2 . This includes:
In the flowchart of FIG. 29, the equation of the straight line _LA is substituted for the equation of the straight line _L1 , and the coordinates (xk+1, yk+1) of the intersection point are calculated. And R=√
Calculate (+ _1-0 ) ² +(+ _1-0 ) ² .

Now, in the middle stitch, as is clear from FIG. 37, the stitch spacing 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 the inner arc unit M ₂ has center coordinates (X ₀ ,
If it is located close to _Y3 ), prevent clogging 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 processing is not performed immediately.
Let RR=R. If the pitch is smaller than 0.4mm, R
is smaller than R ₀ /3, and determines whether R is smaller than R ₀ /3.
If it is larger than 3, the inner inner arc unit M ₂
Assuming that the density of stitches in (Fig. 38) is not so high compared to the outer arc unit _M1 , it is assumed that RR=R. The pitch is smaller than 0.4mm and the radius is smaller than 0.4mm.
If it is smaller than R ₀ /3, it is determined whether or not J is a multiple of 4. If it is not a multiple of 4, it is set as RR=R, and if J is a multiple of 4, it is set as RR=1/3R ₀ . Then, it was calculated separately depending on the parity of J and whether it is a multiple of 4 or not.
Using RR, U (J) = XX0 + RR・cosAGX V (J) = YY0 + RR・sinAGX, while counting up J by 1, set the coordinates of the needle drop point (U (J), V (J)) to J < 1 Calculate sequentially until , and in relation to J>I, (U(J), V(J))
The flow returns after storing the value of the coordinate point =P ₃ =(X ₃ , Y ₃ ).

In other words, if the pitch is P0.4mm or R1/ _3R0 , it is assumed that no clogging will occur, and if J is an even number, RR=R is set, so the needle swing direction is centered around the point (X ₀ , Y ₁ ). In FIG. 37, when J is an odd number, the needle drop point is on the circular arc unit _M1 , and when J is an even number, it is on the inner circular arc unit _M2 , so that the needle drop point advances clockwise.

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, then RR = 1/3R ₀ , and J must be a multiple of 4. RR = R Therefore, as shown in Fig. 38, half of the needle drop points that should be on the inner arc unit _M2 are outside R with respect to (X ₀ , Y ₀ ), RR = R ₀ /
Therefore, the density of the stitches on the inner arcuate unit _M2 is reduced by half and clogging is prevented. In the case of the circle shown in Figure 39, the hollow E set around the center point (X ₀ , Y ₀ ) is used as the inner circular arc unit in Figure 38.
Perform the same process using M ₂ .

(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 The direction angle of the unit from the points (X ₁ , Y ₁ ), (X ₂ , Y ₂ ) at both ends of the unit is AGX = tan ^-1 [(Y ₂ − Y ₁ )/(X ₂
−X ₁ )] and unit length H=√( ₂ − ₁ ) ² +
(Y ₂ −Y ₁ ) ² is calculated, and the number of points in the unit I=H/P is calculated using the pitch P.

Next, the count value of the stitch count counter for each unit
Reset JO to "0" and set the needle drop point (U(J+1), V(J+1)) as U(J+ _{1)=X 1 +} JO・P・cosAGX V(J+1)=Y 1 +JO・P・sinAGX When this calculation is completed, count up JO and J by "1" and again (U (J + 1), V
(J+1)) can be repeated. In this way, when JO becomes larger than the score I, U(J+1)=X ₂ ,V
(J+1)=Y ₂ (final point of unit) and J
is counted up by ``1'' and proceeds to calculate the needle drop point of the next unit.

(2) Three points of the arc unit (X ₁ , Y ₁ ), (X ₂ , Y ₂ ), (X ₃ ,
Y ₃ ) _, the center coordinates (X ₀ , Y _{0 ) and} ^radius R are calculated based on the flow shown in FIG. ₁ −X ₀ )], the final value of the angle AG ₂ = tan ^-1 [(Y ₃ −Y ₀ )/(X ₃ −
Y ₀ )] Total angle AGT=|AG ₂ −AG ₁ | and the angle AGP=P/R for one pitch are calculated. I=
Calculate the score I using AGT/AGP and reset the count value JO of each unit's counter to "0", U (J + 1) = X ₀ + R・cos (AG ₁ + J ₀・AGP) V (J + 1) = Y ₀ +R・sin (AG ₁ +J ₀・AGP) and needle drop point (U (J+1), V (J+1))
When this calculation is completed, JO and J are counted up by 1 and again (U(J+
1), repeat the calculation of V(J+1)). In this way, when JO becomes larger than the score I, U(J+1)=
Set 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 consecutive number of needle drop numbers across each unit within one block.

When the above calculation is completed for all units in one block, 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 fourth
0, 41, and 42 enter the needle drop coordinate storage flow. 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 direction and distance to travel 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 or not, and if it is the first block, the start code 7D is immediately output and U0 = U (1), V0 = V (1). put. If it is not the first block, a check is made for the joint 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)),
Distance between two points L=√(0-(1)) ² +(0-
(1)) Calculate ² and determine the value of L. If L = 0, return immediately, if L≠0, output "80" (command code to command the pattern), and (U0, V0)
and (U(1), V(1)) are connected with a straight seam.

Next, based on the type of swing input using the keys 14a and 14h of the cursor 12, if the swing direction is larger than 45 degrees with respect to the base line If the swing direction is smaller than 45 degrees with respect to the base line, it is assumed to be horizontal swing embroidery and outputs the command code "FE". Output the command code "7F",
If it is a pattern, the command code ``80'' is output, and if it is a jump, the command code ``7E'' is output. 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), set V0 = V (1), and count up JJ by one from "1", so UU = U (2) -
U (1), VV = V (2) - V (1), Check whether one of UU, VV exceeds the pitch P, and if both UU and VV are smaller than the pitch.
Converts UU and VV values into binary code and outputs to data disk. If one of UU or VV is larger than pitch P, this 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
Set (0) = V (JJ), count up JJ by "1", 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 when JJ>J, all the needle drop point coordinates of the block are converted to relative coordinates, and the storage to the data disk is completed, so the directory section write flow shown in Figure 43 is processed and 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 "1" 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 two} points S and press the key 14a to specify the base line Xn connecting _{the two} points _S1 and S. Next, the coordinate transformation coefficient calculation routine ( 10), the angle 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 14 of the cursor 12 and specifying "embroidery stitch", point P ₁ at the lower left corner of the first block of the alphabet "B" is pressed.
Align the mark 13a of the cursor 12 with the point P2, press the key 14b corresponding to the input of "straight line" since the route to the next point _P2 is a straight line, then align the mark 13a with the point _P2 and press the key 14b. This completes the reading between P ₁ and P ₂ . Furthermore, P ₂ − _{P 3} continues
-P ₄ -P ₅ -P ₆ -P ₇ and marks 13a are pressed individually, and the key 14n is pressed to instruct the end of the block at the final point _P8 of the first block. Finish reading the block data.
Next, move the cursor 12 to point _Q1 on the tablet 11.
The swing direction is specified in the Q ₁ -Q ₂ direction (horizontal direction) by aligning the marks 13a with the Q ₂ point and pressing the key 14a, then aligning the marks 13a with the Q 2 point and pressing the key 14a. 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 14 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 14 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, mark 13 of the previous cursor 12
Key 14 to specify "arc" by matching a with P ₁
Press c. Then, in the data check routine of FIG. 13, the count value of the "arc point number" counter becomes "1". Therefore, if you accidentally press the key 14b specifying "straight line" at point _P2 , the count value of the "straight line number" counter will be counted up while the number of arc points is "1", so the flowchart shown in Fig. 13 will be counted up. An error is determined, and this error is notified by a buzzer. Here, key 14 of cursor 12
When j is pressed, the data entered in connection with point _P2 is erased according to the flow shown in FIG. 11, and the buzzer stops. Then, mark 13a of cursor 12 again at point _P2.
key 14 to match and specify "arc" this time.
Press c. Next, mark 13a of cursor 12 at point _P3
match, 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 cursor 12
align the marks 13a and press the key 14c for specifying "arc" separately. At the final point P ₆ , press the key 14n to specify "end" and the points P ₄ , P ₅ , P _{6 are} reached.
The arc is determined by the three points, and the data reading of the third block is completed. Then, if you press key 14h and instruct "medium swing", the circular arc
``Medium swing'' is specified, which is radial to the center point of P <sub>1</sub> , P <sub>2</sub> , and P <sub>3</sub> , and then, by pressing, for example, key 14e among the numeric keys, pitch ``P=0.4 mm'' is set.

Hereinafter, 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 for the third block. The fourth and sixth blocks specify vertical swing, and the fifth block specifies "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 pressing the key 14b of the cursor 12 to set the cursor to 1x,
By aligning the mark 13a of the cursor 12 with point S1 and pressing the key 14a, then by aligning the mark 13a with _S2 and pressing the key 14a, a baseline Xn connecting _{the two} points _{S1 and} S is specified. Then, the inclination of the base line Xn with respect to the X axis of the tablet 11 is calculated by the coordinate conversion coefficient calculation routine (FIG. 10).

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 14 to indicate "end" by matching 3a
Press n. 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 14 of cursor 12
Press to specify "embroidery stitch". Then, block the starting point _P1 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 aligning keys 3a and pressing key 14a, the direction of swing 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 pressing key 14 to set the embroidery stitch, move the point P ₁ P ₂ and cursor 1 in sequence.
By pressing the keys 14d for specifying "circle" while matching the marks 13a of 2, and pressing the key 14n at point _P3 , a circle is determined by points _P1 , _P2 , and _P3, and the circle is set in block _B2 . Reading ends. Then, by pressing the key 14h to instruct "medium swing" and then pressing the key 14c, the pitch "P=0.2" is pressed.
mm”. After reading the data, move the cursor ₁₂ to the final point P3 of the _B2 block in order to move the needle drop point in advance for the next embroidery pattern.
Align mark 13a and press key 14m to specify "jump", then press key 14n to align mark 13a with point _Q1 separated from point _P5 to instruct the end of reading one pattern. When pressed a second time, the "jump" from point P ₃ to point Q ₁ 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 stitch of the Af A bet “B” and the exclamation mark “!” entered in this way is the 5th stitch.
It will look like Figure 3.

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 configuration in which the support frame is moved in the X and Y directions according to the data on the data disk was shown, but the needles are oscillated 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.

In addition, in this example, when the ratio of the diameters of the inner and outer circumferences is 1:3 and the pitch is 0.4 mm or less, the inner circumference needle drop point is set at a position 1/3 between the inner and outer circumferences, but each of the above values is not limited to that of this embodiment.
In addition, in this embodiment, an original drawing is read by a reading means including a tablet 11 and a cursor 12, and data for setting a needle drop point is created by a computer based on the read data. The data may be created by specifying points one by one, or by other methods.

As described above, according to the present invention, when the ratio of the diameter of the inner circumference to the outer circumference is smaller than a predetermined value and the needle drop interval on the inner circumference is shorter than a predetermined length, the needle drop points on the contour line of the inner circumference are By setting the needles to be located alternately at the midpoint of the circumference and on the contour line of the inner circumference, even if the needle drop interval on the inner circumference is short, there will be no clogging, and the embroidery stitches will be finished neatly. The effect of improving product quality can be obtained.

[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 ( Figure 11 is a flowchart for reading data in one block, Figure 12A is a diagram for pattern sewing, Figure 12
Figure B is a diagram of embroidery sewing, 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 unit. Flowchart for adding configuration data to 21st and 22nd
The figure is a flowchart for calculating the maximum and minimum coordinates of one pattern, Figure 23 is a flowchart for calculating display coordinates on a CRT, Figure 24 is a flowchart for giving a different color display code for each block, and Figure 25 is a flowchart for calculating display coordinates on a CRT. Figure 26 is a flowchart for calculating the center coordinates and radius of a circle or arc, and Figure 26 is a flowchart for specifying the type of swing.
Figures 7 and 28 are flowcharts for calculating the needle drop point when specifying the swing direction, Figure 29 is a flowchart for calculating the coordinates of the intersection of the unit and straight line Ln, and Figure 30 is a flowchart for specifying the needle drop point when specifying the swing direction. 31A to 31C are diagrams showing the positional relationship when the intersection of the straight line Ln and each unit is "2", and FIG. 32 is a diagram showing the positional relationship when the intersection of the straight line Ln and each unit is "3". FIG. 33 is an explanatory diagram of the case where the intersection point of the straight line Ln and each unit is "4", FIG. 34 is an explanatory diagram of the state where the needle drop coordinate is selected from the intersection points of each unit, 35th,
Figure 36 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, Figure 39 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 the data disk, and Figure 43 is a diagram of adding the directory part to the data. Flowchart for adding, FIGS. 44-49 are diagrams of the reading state of pattern "B", FIGS. 50-52 are diagrams of the reading state of pattern "!", and FIG. 53 is a diagram of pattern "B" and "!" ” is a diagram of the embroidery stitches.

Claims (1)

[Claims] 1. The embroidery stitch is electrically actuated based on the coordinate data corresponding to the needle drop point on the cloth to form an embroidery stitch with a predetermined contour line, and the cloth is moved in the X direction or Y direction relative to the vertical movement position of the needle. In an embroidery sewing machine having a cloth transfer means that moves in a direction or a composite direction, needle drops are placed at equal intervals on the inner and outer contours of the inner and outer circumferences so as to form embroidery stitches within the contour lines with the inner and outer circumferences being concentric circles. For setting points, the ratio of the diameter of the inner circumference to the outer circumference and the needle drop interval of the inner circumference are determined based on the coordinate data or the original pattern data for forming the coordinate data, and if the ratio is smaller than a predetermined value and When the interval is shorter than a predetermined length, a predetermined point between the inner and outer circumferential contours is calculated and set, and coordinate data is set so that the needle drop points on the inner circumferential contour are alternately located at the predetermined point and on the inner circumferential contour. How to control the needle drop of an embroidery sewing machine by calculating and setting.