JP3061217B2 - Underlay sewing data creation device for embroidery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underlay sewing data creating apparatus for embroidery and, more particularly, to underlay sewing from data of contour points of an underlay area obtained or set from a designated underlay target frame. In which the needle drop point is obtained by calculation.

[0002]

2. Description of the Related Art Conventionally, the applicant of the present application has disclosed in Japanese Patent Publication No. Sho 60-42740, for example, that a plurality of embroidery areas such as characters and figures can be stored in such a manner that embroidery data for an embroidery pattern can be stored with a minimum storage capacity. The embroidery area data including the block data indicating a plurality of contour line elements for dividing the blocks into blocks and defining the contours of the blocks, and thread density data defining the number of stitches formed in the block by the embroidery thread is obtained. An embroidery pattern storage / reproduction device is proposed which stores the data, obtains the needle drop point position data for each block based on the block data and the thread density data, and performs embroidery sewing using the needle drop position data. did.

By the way, in order to prevent shrinkage of a work cloth on which embroidery sewing has been performed and to enhance appearance and texture by raising embroidery, underlay sewing data for underlay sewing is created. Embroidery area data is created including stitching data. In this underlay sewing, prior to embroidery sewing, tatami stitch or satin stitch sewing is performed at a coarse stitch pitch so as to form a stitch substantially perpendicular to the embroidery stitch. Is input and set with needle drop position data (coordinate data) defining a plurality of needle drop points. For example, the embroidery area shown in FIG.
When the underlay sewing is performed on both of the blocks B1 and B2, the underlay sewing data for the underlay sewing includes a plurality of needle drop points b1, p50, p51, p52,
··· Includes coordinate data of p58, p50, and b1.
The four needle drop points b1, b2, b3, b4 are defined points that define the block B1.

When sewing an embroidery pattern using embroidery area data in which the underlay sewing data is stored, the embroidery pattern can be sewn by reducing or enlarging it according to the size of the embroidery location. In this case, in this case, the created embroidery area data is changed using the reduction rate or the enlargement rate.

[0005]

As described above, the underlay sewing data for underlay sewing is created by inputting a plurality of needle drop points in the manual mode, so that the underlay sewing data creation process is complicated. And the amount of underlay sewing data increases. Further, for example, in order to reduce the embroidery area shown in FIG. 13, the created embroidery area data is reduced using a reduction ratio, and the needle drop position is obtained from the reduced embroidery area data to perform embroidery sewing. The underlay stitching data is also reduced in the same way, and although the number of underlay stitches is not changed even though the embroidery area has been reduced, the thread density of the underlay stitch increases. There are problems such as the appearance and texture being deteriorated due to enlargement, and the work cloth shrinking due to the underlay sewing having a high thread density.

On the other hand, when the created embroidery area data is subjected to enlargement processing using an enlargement ratio and the needle drop position is obtained from the enlarged embroidery area data to perform embroidery sewing, the underlay sewing data is similarly enlarged. Since the number of stitches for underlay stitching is not changed in spite of the enlarged embroidery area, the thread density of underlay stitching is reduced, so that the sewn embroidery is reduced, and the appearance and texture are reduced in the same manner as described above. There is a problem that it gets worse.

SUMMARY OF THE INVENTION An object of the present invention is to provide an embroidery that can easily create underlay sewing data that can perform underlay sewing with an ideal thread density even when an embroidery pattern is subjected to reduction processing or enlargement processing. An object of the present invention is to provide an underlay stitching data creating device.

[0008]

According to a first aspect of the present invention, an underlay sewing data generating apparatus for embroidery is controlled in position independently in the X and Y directions of an embroidery sewing machine as shown in a functional block diagram of FIG. Data driving means for storing the block data defining the contour line elements of the plurality of blocks obtained by dividing the embroidery area to be sewn and the thread density data defining the thread density. An underlay sewing data creating device for embroidery, which develops data stored in the data storage means into underlay sewing data defining needle entry points of underlay sewing, wherein the data storage means includes block data and thread density data. In addition to the above, designation data for designating an underlay target frame composed of a plurality of blocks connected in one or a row to be subjected to a series of underlay stitches is further stored in the data storage means. Contour calculating means for calculating the contour points of the underlay area set at predetermined small intervals inside the contour line element of each underlay target frame based on the data; based on the data of the contour points in the region, determining one underlying stitch pattern from among a plurality of <br/> underlying stitch pattern set in advance in correspondence with the width of the underlying stitch area
And a needle drop point calculating means for determining the position of the needle drop point for underlay sewing.

According to a second aspect of the present invention, there is provided an embroidery underlay sewing data generating apparatus for driving a cloth moving means whose position is controlled independently in the X and Y directions of an embroidery sewing machine, as shown in the functional block diagram of FIG. An embroidery underlay sewing data creating device for creating underlay sewing data for embroidery underlay for performing embroidery underlay sewing, comprising: data storage means for storing area defining data for defining an embroidery underlay area; and data storage means. based on the stored region defining data to force one of the plurality of underlying stitch pattern set in advance in correspondence with the width of the underlying stitch area
And a needle drop point calculating means for determining the position of the needle drop point for underlay sewing.

[0010]

According to the embroidery underlay stitching data generating apparatus of the present invention, block data defining contour elements of a plurality of blocks obtained by dividing an embroidery area to be embroidered and thread density data defining thread density are provided. In addition, since the designation data for designating the underlay target frame composed of one or a plurality of blocks arranged in a row to be subjected to a series of underlay stitches is further stored in the data storage means, the contour calculation means performs data storage.
Based on the data stored in the means, the contour points of the underlay area set at predetermined small intervals inside the contour line element of each underlay target frame are calculated. The needle drop point calculating means is a contour calculating means.
Based on the data of the contour points of the underlying stitch area determined in stage, the needle of the lower stitch sewing together determines one underlying stitch pattern from a plurality of underlying stitch pattern set in advance in correspondence to the width of the strike area Determine the location of the drop point.

In this manner, by simply storing in the data storage means the designated data for designating the underlay target frame to be subjected to a series of underlay stitches, the data of the contour points of the underlay region from the underlay target frame is obtained. Since the position of the needle drop point of the underlay sewing is determined from the data of the contour point, input of a plurality of needle drop points for the underlay sewing in the manual mode can be omitted, and the underlay sewing data can be easily created. . Further, even when the data stored in the data storage means is subjected to the enlargement processing or the reduction processing, the position of the needle drop point of the underlay sewing is calculated each time from the contour point data of the underlay area subjected to the enlargement processing or the reduction processing. Therefore, underlay sewing data having an ideal thread density can be created. Therefore, it is possible to prevent the appearance and the texture from being deteriorated due to the moderate swelling of the embroidery.

In the embroidery underlay sewing data generating device according to the second aspect, since the area defining data for defining the embroidery underlay area is stored in the data storage means, the needle dropping is performed.
The point calculation means is a means for defining the area stored in the data storage means.
Based on the data, one underlying stitch path from among a plurality of underlying stitch pattern set in advance in correspondence with the width of the underlying stitch area
Determine the turn and the position of the needle entry point for underlay sewing.

As described above, the position of the needle drop point of the underlay sewing is determined from the area defining data only by storing the area defining data defining the underlay area for embroidery in the data storage means. The input of a plurality of needle drop points for underlay sewing can be omitted, and underlay sewing data can be easily created. Further, even when the area defining data of the data storage means is subjected to the enlarging processing or the reducing processing, the position of the needle drop point of the underlay sewing is obtained each time from the enlarging or reducing the area defining data. It is possible to create underlay sewing data that becomes the thread density. Therefore,
Appropriate embroidery swelling can prevent appearance and texture from deteriorating.

[0014]

According to the embroidery underlay stitching data generating apparatus according to the first aspect, as described in the paragraph of [Function], the underlay target frame is stored in the data storage means in addition to the block data and the thread density data. while storing designation data for designating the provided and outline arithmetic means and the needle drop point calculating means, the data of the contour points of the underlying stitch area is determined from the underlying stitch object frame specified data under the data of the contour points Since the positions of the perforation patterns and the needle drop points of the underlay sewing are determined, input of a plurality of needle drop points for the underlay sewing in the manual mode can be omitted, and the underlay sewing data can be easily created. Further, even when the data stored in the data storage means is subjected to the enlargement processing or the reduction processing, the position of the needle drop point of the underlay sewing is calculated each time from the contour point data of the underlay area subjected to the enlargement processing or the reduction processing. Therefore, underlay sewing data having an ideal thread density can be created. Therefore, it is possible to prevent the appearance and the texture from being deteriorated due to the moderate swelling of the embroidery.

According to embroidery underlying stitch sewing data creation device according to claim 2, as described in the section [action], provided a data storage means and the needle drop point arithmetic unit, below this region defining data Since the position of the needle drop point of the striking pattern and the underlay sewing is determined, the same effect as that of the first aspect can be obtained.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a multi-needle embroidery sewing machine. Multi-needle embroidery sewing machine 1
Will be described with reference to FIG.
A sewing machine arm 3 is provided on the upper side, and a needle bar support case 4 which supports five needle bars 5 so as to be vertically movable is mounted on the front end thereof so as to be movable in the left-right direction. At the lower ends of the needle bars 5, sewing needles 6 are attached, respectively, and the upper thread 37 fed from the bobbin 35 is passed through the corresponding thread tensioner 7 and balance 8, and
Respectively.

The needle bar support case 4 is moved in the left and right direction by the driving of a needle bar changing motor 9, and is moved to a driving position to reciprocate one of the selected needle bars 5 up and down by the driving of a sewing machine motor 10. Be moved. At the front end of the sewing machine table 2, a sewing machine bed 11 is extended forward. Inside the sewing machine bed 11, a thread for forming a stitch on the work cloth W in cooperation with the vertical movement of the sewing needle 6 is provided. A wheel catcher (not shown) is provided.

[0018] In the interior of the base 23 for placing the sewing machine table 2, a pair of Y-direction moving arm (only one shown)
Numeral 12 is provided so as to be movable in the Y direction (front-back direction) in the XY plane by a Y-direction feed motor 13 (see FIG. 4). It protrudes upward to face.

A support member 14 extending in the left-right direction is fixed between the upper ends of the pair of Y-direction moving arms 12, and an X-direction moving arm 15 is attached to the supporting member 14 in an X-direction feed motor 16 (see FIG. 4). Are provided so as to be movable in the X direction (left-right direction) in the XY plane. Further, an embroidery frame 17 for detachably mounting the work cloth W is attached to the front end of the X-direction moving arm 15. Therefore, the work cloth W mounted on the embroidery frame 17 is
X is moved in the Y direction by a Y direction moving arm 12 driven by
The work cloth W is moved in the X direction by the
Various embroidery patterns such as characters and figures are formed thereon.
Reference numeral 21 denotes a support plate placed and fixed on the upper side of the sewing machine arm 3.
The bobbin 35 is provided with a bobbin 35 having a thread color necessary for embroidery sewing. Reference numeral 30 denotes a guide member for guiding the upper thread 37 fed from the bobbin 35.

Further, a floppy disk drive device 40 is built in the base 23, and an operation panel 18 is mounted so as to face the upper side of the sewing machine table 2. The operation panel 18 is provided with a liquid crystal display 19 capable of displaying characters and symbols and a keyboard 20. The keyboard 20 is used for inputting an embroidery pattern and a seam density applied to the work cloth W, and is necessary for inputting and editing keys and data for designating embroidery patterns such as alphabets, numbers, and symbols. Various function keys are provided.

Next, the control system of the multi-needle embroidery sewing machine 1 is configured as shown in the block diagram of FIG. A display controller (LCDC) 46 for the display (LCD) 19, a keyboard 20, a drive circuit 41 for the sewing machine motor 10, and an X-direction feed motor 16
, A drive circuit 43 for the Y-direction feed motor 13, a drive circuit 44 for the needle bar changing motor 9, and a floppy disk controller (FDC) for the floppy disk drive (FDD) 40. 45 is
Each is connected to the input / output interface 47 of the control device C.

The floppy disk drive device 40
Floppy disk (not shown) that is detachably attached to
The embroidery data memory 55 stores a plurality of types of embroidery area data such as characters and figures in association with embroidery pattern numbers.
Is provided. Each of the embroidery area data stored in the embroidery data memory 55 includes color number data for indicating the thread color of the upper thread 37, thread density data for defining the thread density, a start code for starting underlay sewing, and Exit code,
Block coordinate data for a plurality of blocks, work cloth W
And feed data for instructing the movement of the data. Here, the designation data for designating the underlay target frame to be subjected to the underlay sewing is constituted by the underlay start code and the underlay end code.

For example, the embroidery area of the character "A" is divided into five blocks B1 to B5 as shown in FIG. 5, and this embroidery area data is composed of thread color number data, thread density data, Underlay start code, block data of block B1 and block B2, feed data... Block data of block B5 are sequentially stored. Here, the block data, for example in the case of the block B1 shown in FIG. 5, four defined points that define a rectangle b
It consists of coordinate data of 1, b2, b3 and b4.

The control device C includes a CPU 49 and a CPU 49.
An input / output interface 47, a ROM 50, and a RAM 51 are connected to the input / output interface 47 via a bus 48 such as a data bus. The ROM 50 contains the motors 9 and 10
A drive control program for driving 13 and 16 and a control program for underlay sewing data and stitch data creation control, which are specific to the present invention, are stored. RAM 51
There are a data memory for storing embroidery area data read from the embroidery data memory 55, a thread color memory, a thread density memory, a work memory, a buffer for temporarily storing the operation results calculated by the CPU 49, a counter and a pointer. Various memories are provided. The underlay sewing data creation device basically includes a control device C, an operation panel 18, a floppy disk drive device 40, and a floppy disk controller 45.

Next, a routine for underlay stitching data / stitch data creation control performed by the underlay stitching data creating apparatus will be described with reference to the flowchart of FIG. In the figure, reference symbol Si (i = 30, 31, 32,...)
・) Is each step. When the embroidery pattern to be embroidered is selected on the keyboard 20 and the start of sewing is instructed, this control is started. First, the counter P and the memory N are respectively cleared (S30), and the embroidery area related to the selected embroidery pattern. The data is read from the embroidery data memory 55 of the floppy disk and stored in the data memory (S31). Next, an edit process for enlarging or reducing the embroidery area by operating an edit key on the keyboard 20 is executed (S32). Next, the embroidery area data is searched, and the data number N is set in the data number memory (S
33) "1" is set to the data number counter P to indicate the first data (S34).

Next, the content of the data designated by the data number counter P is searched (S35). If the data is the thread color number data, the needle bar 5 corresponding to the thread color number is set to the driving position. A motor drive signal for driving the needle bar changing motor 9 is output (S36). Next, the data number counter P is incremented by one (S37), and when the data number counter P is equal to or smaller than the data number N (S38: N
o), and return to S35. When the data content indicated by the data number counter P is the thread density data, the thread density data D is stored in the thread density memory (S39). When the content of the data indicated by the data number counter P is block data, on the first main side and the end point defined by the end points 1 and 3 of the block based on the block data and the thread density data D. Stitch data (needle drop position data) development processing for obtaining a needle drop point on the second main side defined by 2 and the end point 4 is executed (S40), and the double feed motors 13 and 16 are controlled based on the stitch data. The motor drive signals to be driven are output (S41).

Next, when the content of the data indicated by the data number counter P is feed data, a feed signal based on the feed data is output (S42).
Motor drive signals for driving the two feed motors 13 and 16 are output based on the feed signals (S41). On the other hand, when the content of the data indicated by the data number counter P is the underlay start code, the underlay end code is searched while incrementing the data number counter P (S43). The block data of one or a plurality of blocks stored during the period is read, and these block data are stored in the work memory of the RAM 51 (S44). For example, in the case of the embroidery area data shown in FIG. 6, two blocks B1, stored between the underlay start code and the underlay end code,
The block data of B2 is stored in the work memory.

Next, based on the block data stored in the work memory, an underlay target frame composed of the plurality of blocks is obtained, and a predetermined small interval (inside the contour line element of the underlay target frame) is obtained. For example, a contour point of the undercut area UE and a contour line thereof are obtained with an interval of about 0.5 mm (S).
45). For example, as shown in FIG.
1. Underlay area UE inside the underlay target frame consisting of 1, B2
The outline points u1, u2, u3... U6 and their outlines are determined.

Next, based on the data of the contour points of the underlying stitch area UE, 1 single underlying stitch path from among a plurality of underlying stitch pattern which is previously set <br/> in relation to the width of the underlying stitch area UE
The turn is determined, and underlay data defining the position of the needle drop point of the underlay sewing is calculated (S46). For example, as shown in FIG. 8, three blocks B10, B1
Four sub-sides L of the underlay target frame K1 composed of 1, B12
The average value X of the lengths of 1, L2, L3, and L4 is 1 mm ≦ X <
In the case of 2 mm, the underlaying area UE1 is the undertaking target frame K1.
And the middle point e of each length of the sub-sides L1 to L4,
f, g, and h are respectively obtained, and a point i and a line segment g on the line segment ef are obtained.
and a point j on h. Then, coordinate data of the specified point b11, point i, point f, point g, point j, point g, point f, point i, and specified point b11 are sequentially created as underlay data.

For example, as shown in FIG. 9, the average value X of the lengths of the four sub-sides L5 to L8 of the undercut target frame K2 composed of three blocks B13, B14 and B15 is 2 mm.
When ≦ X <10 mm, the underlying stitch area UE2 under beating pairs
It is determined inside the contour line element of the elephant frame K2. That is, eight points u10, u11, u
.., U17. next,
An undercut block Q13 composed of these four points u10, u11, u12, u13, and four points u12, u13, u
14, underlay block Q14 consisting of four points u14, u15, u16, and u17, on each of the underrun blocks Q13 to Q15 using very large thread density data. Needle drop points m and n are obtained. Then, as the under strike data, the specified point b12, the point u10, the point n1, the point m1, the point n
2, point u12, point n3... Point n6, point u16, point u
14, point u12, point u10, point u11, point u13, point u
15, point u17, point u16, point s (middle point of subside L7),
The coordinate data of the point t (the middle point of the subside L6), the point u10, and the specified point b12 are sequentially created.

On the other hand, for example, as shown in FIG. 10, the average value X of the lengths of the four sub-sides L9 to L12 of the undercut target frame K3 including three blocks B16, B17, and B18 is
When X ≧ 10 mm, the understrike area UE3 is obtained inside the contour line element of the understrike target frame K3. That is, eight points u10, u11, and u1 are set as the under region UE3.
.. U17. Next, an undercut block Q consisting of these four points u10 to u13
16, the underside block Q17 composed of four points u12 to u15, and the underside block Q18 composed of four points u14 to u17. Needle drop points m and n are obtained above. Further, division points at which each of the sub-sides L9 to L12 is divided into an even number (for example, four) are obtained. .., U1,..., Point u1 as defined points b13, points u10, u12, u14, u16,.
1... Needle drop points of satin stitches passing through the division points of the sub-sides L9 to L12 by point u17, points m3, n5, and u
... Coordinate data of the needle drop point of the satin stitch passing through the division point on the main side is sequentially created by the point u10.
Note that the number of divisions of the sub-sides L9 to L12 can be increased as the average value X of the lengths of the sub-sides L9 to L12 of the undercut target frame K3 increases.

Next, based on the prepared underlay data,
Underlay sewing signals (motor drive signals) for driving the both feed motors 13 and 16 are sequentially output at a timing synchronized with the vertical movement of the needle bar 5 (S47). Next, the underlay data is cleared (S48), and based on the block data and the thread density data D of one or more blocks stored between the underlay start code and the underlay end code, each block is set. Is performed in step S4.
0). Then, S35 to S48 are repeated, and when the data number counter P becomes larger than the data number N (S3
8: Yes), this control ends.

For example, for the character "A" shown in FIG.
As shown in FIG. 11, underlay sewing is performed on the underlay area UE of the two blocks B1 and B2, and thereafter, embroidery sewing is performed on the embroidery area including the five blocks B1 to B5.

As described above, the contour point data of the underlay area UE is obtained from the underlay target frame specified by the understrike start code and the understrike end code, and the underlay sewing is performed from the contour point data. Since the position of the needle entry point is determined, the input of multiple needle entry points for the underlay sewing in the manual mode can be omitted, the underlay sewing data can be easily created, and the amount of underlay data can be reduced. Can be reduced. Further, even when the embroidery area data stored in the embroidery data memory 55 provided on the floppy disk is subjected to the enlargement processing or the reduction processing, each time the embroidery area data is reduced from the contour point data of the underlay area UE subjected to the enlargement processing or the reduction processing. Since the position of the needle drop point of the stitching is obtained, it is possible to create the data of the underlay stitching having an ideal thread density. Therefore, it is possible to prevent the appearance and the texture from being deteriorated due to the moderate swelling of the embroidery.

Instead of the embroidery area data, closed area data (outline data) representing a closed area related to the outline of the embroidery area is stored in the embroidery data memory 55. It is also possible to divide the area into a plurality of small partial closed areas and use block data obtained from the data of the plurality of partial closed areas. Note that the underlay sewing data creation device can be provided separately from the embroidery sewing machine 1.

By the way, it is also possible to set the underlay area defining data defining the underlay area UE as the embroidery area data. For example, as shown in FIG. 12, the underlay area defining data may be set at the position of data number "3". Like the block data, the underscore area defining data is composed of coordinates of a plurality of points defining the outline points of the underscore area. Therefore, while the data number counter P is "3", the data is divided into a plurality of under-printing blocks based on the under-printing area defining data read out, while being related to the width of the under-printing area as shown in FIGS. It is also possible to obtain understrike data so as to have a preset understrike pattern. In this case, the same effects as in the above embodiment can be obtained.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing the configuration of the first invention .

FIG. 2 is a functional block diagram showing a configuration of the invention according to claim 2;

FIG. 3 is a schematic perspective view of a multi-needle embroidery sewing machine according to an embodiment of the present invention .

FIG. 4 is a block diagram of a control system of the multi-needle embroidery sewing machine.

FIG. 5 is a diagram showing the embroidery area of the divided into 5 blocks character pattern "A".

FIG. 6 is an explanatory diagram illustrating embroidery area data of the character pattern “A” in FIG. 5;

FIG. 7 is a schematic flowchart of a routine for underlay sewing data / stitch data creation control;

FIG. 8 is an explanatory diagram illustrating an underlay sewing pattern when the width of the underlay region is small.

FIG. 9 is an explanatory diagram illustrating an underlay sewing pattern when the width of the underlay region is somewhat narrow.

FIG. 10 is an explanatory diagram illustrating an underlay sewing pattern when the width of the underlay region is large.

FIG. 11 is an exemplary view showing an underlay sewing pattern in which underlay sewing is performed on a part of the embroidery area of the character pattern “A”;

FIG. 12 is a diagram corresponding to FIG. 6 according to a modification.

FIG. 13 is an explanatory diagram illustrating a technique for creating underlay sewing data according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-needle type embroidery sewing machine 12 Y direction moving arm 13 X direction feed motor 15 X direction move arm 16 Y direction feed motor 17 Embroidery frame 40 Floppy disk drive 49 CPU 50 ROM 51 RAM C controller

──────────────────────────────────────────────────の Continuation of the front page (56) References JP-A-3-1892 (JP, A) JP-A-2-133647 (JP, A) JP-B-6-102115 (JP, B2) JP-B-3 15479 (JP, B2) Patent 2778732 (JP, B2) Patent 2734128 (JP, B2) Patent 2704409 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D05B 19/00-21 / 00

Claims (2)

(57) [Claims] 1. A block for defining contour line elements of a plurality of blocks obtained by dividing an embroidery area to be embroidered to drive a cloth moving means whose position is independently controlled in an X direction and a Y direction in an embroidery sewing machine. An embroidery underlay for developing data and thread density data for defining thread density, and for developing the data stored in the data storage means into underlay sewing data for defining needle entry points of underlay sewing A sewing data creating apparatus, wherein the data storage means further includes, in addition to the block data and the thread density data, an underlaying object including one or a plurality of blocks connected in a row to be further subjected to a series of underlaying stitches. Designation data for designating a frame is stored. Based on the data stored in the data storage means, the underlay set at predetermined small intervals inside the contour line element of each underlay target frame The outline calculation means for calculating a contour points pass provided, wherein on the basis of the data of the contour points of the underlying stitch area determined by the outline arithmetic means, preset to correspond to the width of the underlying stitch area
One underlay pattern from multiple underlay patterns
And a needle drop point calculating means for determining the position of the needle drop point of the underlay sewing. 2. An embroidery underlay sewing data creating apparatus for creating underlay sewn data for embroidery underlay sewing for driving a cloth moving means whose position is independently controlled in an X direction and a Y direction in an embroidery sewing machine. A data storage means for storing area defining data for defining an embroidery underlay area, and a preset area corresponding to the width of the underlay area based on the area defining data stored in the data storage means. One underlay pattern from a plurality of underlay patterns
And a needle drop point calculating means for determining the position of the needle drop point of the underlay sewing.