JPH03195598A - Stitch length compensating method of embroidering machine - Google Patents

Abstract

PURPOSE:To prevent a needle from being dropped several times at the same position of a work fabric and resolve a trouble of thread breakage by comparing each stitch length of the data read from a medium with the minimum stitch length, and taking the insufficient length from a stitch with a margin in length located at the front or rear of this stitch if this stitch is shorter than the minimum stitch. CONSTITUTION:In an embroidering machine which reads the data regarding the stitch length or the like held on a medium such as a punching tape into a control system and independently drives an embroidering frame and a needle bar to embroider the required pattern on a work fabric, if a very short stitch is mixed in a series of stitches, the insufficient length is taken for compensation from a stitch with a margin in length located at the front or rear. The minimum stitch length for effective embroidering is set to 0.3mm, for example. If a seam N has a very short length 0.1mm, effective embroidering can not be attained by this stitch. The minimum length 0.2mm required for effective embroidering is taken for compensation from the stitch 1.9mm with a margin in length on the previous seam N-1. A needle can be prevented from being dropped several times at nearly the same position of the work fabric.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a stitch length compensation method for an embroidery machine, and more specifically, it is a method for reading data related to stitch length, etc. held on a medium such as punching tape into a control system of an embroidery machine. In an embroidery machine that independently drives the embroidery frame and needle bar to embroidery a desired shape on a workpiece fabric, even if there are extremely short stitches in a series of stitches, the length of the stitches before and after the stitches may vary. The short stitch length is compensated for by taking in the missing length from the stitches with extra margin, thereby preventing the needle from dropping multiple times in almost the same place on the workpiece fabric, and reducing thread breakage. This invention relates to a stitch length compensation method that can effectively prevent the occurrence of stitch length.

Prior Art An embroidery frame with a stretched work cloth set therein is driven in any direction on the plane coordinates, and a sewing needle provided on a needle holder that moves up and down reciprocates through the work cloth, and the upper thread held by the sewing needle and Embroidery machines that embroidery a desired shape onto a workpiece fabric using bobbin thread stored in a bobbin are widely used. With the latest embroidery machines,
Automation of control through the use of computers has progressed, and it has become possible to store embroidery data manually entered from outside and output the data to the embroidery frame drive system as needed, making it possible to embroidery almost fully automatically. It has become.

For example, embroidery data is
data, Y data indicating the amount of vertical movement, and function data indicating control of the embroidery machine (for example, stitch code, jump code, stitch code, tape end code, thread trimming code, etc.) constitute one stitch. As shown in FIG. 9, the stitch length is expressed as a function d<-i) of X data and Y data. The embroidery data, which consists of one stitch of these three characters, is held by punching the punching tape in three rows.

Specifically, by pointing at the embroidery design of the desired shape on the tape data creation machine, the punching tape is automatically punched, thereby generating X-Y data and function data that define the length of each stitch. retained on the tape. The resulting punching tape.

The embroidery frame is read into the memory built into the control system of the embroidery machine via a compatible tape reader, and the commands output from the control system according to the read data drive the embroidery frame to an arbitrary position on the plane coordinates and the needle bar. is moved up and down to perform embroidery stitching on the work cloth that has been sewn onto the embroidery frame.

Problems to be Solved by the Invention As mentioned earlier, the stitch length d in embroidery data is expressed as a function of X data and Y data, and as an example, it is 0.11 m1 to 12.1 m in ternary system.
wn can be set in the range of 0.1nvn-12.7mwn in binary notation. In order to accommodate the embroidery of a variety of shapes, the length of each stitch is extremely variable. For example, as shown in Figure 8(a), the first stitch is 2
．． Onn, 2nd stitch 2.3mm, 3rd stitch 1.9m, 4
Stitch is 0.1nn, 5th stitch is 2, Onn, 6th stitch is 3.
2 pus, 7th needle is 5.0mm. However, when punching the tape with the tape data creation machine,
Extremely short stitches such as 0.1 mm may be unexpectedly input due to pointing switch chattering or other human errors. In this way, if short stitches of about 0.1 mm to 0.3 I are stored on the tape, when the embroidery machine is actually operated, the needle will fall twice at almost the same location on the fabric (
If %L stitches are consecutive, it will result in multiple drops of 3 or more times.

In this way, if the needle falls multiple times at almost the same location on the workpiece cloth, thread breakage is likely to occur, resulting in the embroidery machine stopping operation and reducing production efficiency. Therefore, in the tape data creation machine mentioned above, when pointing at an embroidery design, there is a function to omit stitches whose length is less than the minimum stitch length and prevent the tape from being perforated. Already proposed.

However, not all tape data creation machines have such a function, so the aforementioned problems remain with tapes processed by tape data creation machines that do not have this function. It is not a fundamental solution.

Furthermore, embroidery machines that use punching tape generally have a function of enlarging and reducing embroidery patterns. Therefore, even if the tape data creation machine uses a punching tape that has omitted stitches of less than the minimum stitch length, if the embroidery machine performs a 50% reduction operation,
The stitch length on the tape data is, for example, 0.4 mm, but the stitch length when the embroidery machine is in operation is 0.2 mm, and the above-mentioned drawbacks become apparent.

Purpose of the Invention The present invention has been proposed in view of the above-mentioned problem to be solved in order to suitably solve the problem. In other words, in the X-Y data that defines the stitch length in the embroidery data,
Reads and stores embroidery data in the embroidery machine's memory when the needle falls multiple times on almost the same spot on the fabric, including short stitches (for example, 0.1 mm) that may cause thread breakage. In this process, the shortest stitch length is set as a standard without the risk of thread breakage, and the shortest stitch length is automatically compensated for to prevent the needle from dropping multiple times at the same location on the fabric. It is an object of the present invention to provide a means for preventing thread breakage and the various inconveniences associated with it.

Means for Solving the Problems In order to overcome the above-mentioned problems and suitably achieve the intended purpose, the stitch length compensation method for an embroidery machine according to the present invention provides holding X-Y data and function data defining the length of the medium, and reading the data held on the medium;
The embroidery frame is provided with a control system that gives necessary commands to each drive system of the embroidery frame and the needle bar, and the embroidery frame is driven to an arbitrary position in plane coordinates and the needle bar is reciprocated up and down according to the commands from the control system. Then, in the embroidery machine that performs embroidery stitches on the work cloth set in the embroidery frame, the minimum stitch length that can form an effective embroidery cloth is set with respect to the length of the stitches, and each stitch of the data read from the medium is Compare the length with the minimum stitch length, and if the length of the stitch is shorter than the minimum stitch length, calculate the shortened stitch length from the stitches that are located before or after the stitch and have an extra length than the minimum stitch length. The feature is that the length is taken into account.

Embodiment Next, a preferred embodiment of the stitch length compensation method for an embroidery machine according to the present invention will be described with reference to the accompanying drawings. FIG. 7 shows a general control system of an embroidery machine with a built-in computer.

Various elements and interfaces listed below are connected to the central processing unit CPU.

0) A storage element ROM containing a control program for the embroidery machine, data for delaying the movement start timing of the embroidery frame 16 in accordance with the movement range of the embroidery frame 16, and the like.

■Storage element RAM that stores data related to embroidery designs created by external personnel, calculation data, etc.

■Operation panel interface 20 connected to the operation panel 18 of the embroidery machine. The panel 18 includes an operation switch 18.
a and a stop switch 18b are provided.

(2) Interface 24 connected to the driver 22 The driver 22 outputs driving pulse currents to the X-axis pulse motor 26 and the YIliilIl pulse motor 28, respectively, which drive the embroidery frame 16.

■ Tape reader interface 32° connected to the tape reader 30 ■ Interface 38° connected to the driver 36 that drives the spindle motor 34 ■ Angle sensor interface 42° connected to the rotary encoder 40 As described above, the tape reader 30 includes: X data that indicates the amount of left and right movement in the coordinate system, Y data that shows the amount of up and down movement, and function data that instructs the control of the embroidery machine (
For example, a punching tape is hung on each stitch in which embroidery data consisting of three characters (for example, a jump code, etc.) constitutes one stitch is perforated. and central processing unit CP
U corresponds to the data read by the tape reader 30,
The X-axis pulse motor 26 and the Y-axis pulse motor 28 are driven, thereby imparting a combined motion to the embroidery frame 16 in the X-axis and Y-axis directions. The main shaft motor 34 rotates a main shaft (not shown) to reciprocate the needle bar up and down, and also rotates a hook to embroidery a desired shape on the work cloth set in the embroidery frame 16. Such a control system is not particularly new in itself, but is common in computer-controlled embroidery machines.

A specific example of implementing the stitch length compensation method according to the present invention using this type of embroidery machine will be described with reference to flowcharts shown in FIGS. 1 to 5. First, the memory element RAM described with reference to FIG. 7 reads and stores the embroidery data held on the punching tape with the tape reader 30, but the contents of this memory element RAM are as shown in FIG. It is divided into a first memory M1 and a second memory M2. Here, the first memory M is a storage location for storing embroidery data read from the punching tape (X data, Y data, and Noah 1 stitch data constitutes one stitch); They are stored in stitch order from address 1 to address n of M□, and further to address (n+1), address (n+2), and so on. That is, n
, (n+1), (n+2), etc. indicate the number of stitches (number of stitches) in the data structure stored in the first memory M.

Further, the second memory M2 is a storage location for storing data obtained by performing necessary corrections on the embroidery data stored in the first memory M□. In other words, the embroidery data to be stored is
The data, Y data, and function data constitute one stitch, which is the same as the embroidery data stored in the first memory M. However, the X data and Y data that define the stitch length (function d) are modified as necessary as described later, and each stitch length is smaller than the minimum stitch length.
2 (however, the function data is not modified). and second memory M2
from address 1 to address m, and further from address (m+1) to address (m+
2) Addresses are stored in stitch order. Here again, addresses such as m, (m+1), (m + 2), etc. indicate the number of stitches (number of stitches) in the data structure stored in the second memory M2.

Next, among the embroidery data stored in the first memory M,
How can the X data and Y data that define the stitch length d be stored in the second memory M in a form that is modified as necessary?
2 will be stored (replaced). Specifically, in FIG. 8(a) mentioned earlier, it is assumed that the minimum stitch length that can effectively form an embroidered garment without the needle dropping in approximately the same location on the work cloth is 0.3 mm. In this case, if the fourth stitch is extremely short, 0.1 mm, it will not be possible to achieve effective stitching with this stitch. So, I decided to use 1.9, which is the last 3rd stitch that has enough length.
0.2nw is the minimum required for effective sewing from the beginning.
It takes in n. As a result, as shown in Figure 8(b), the third needle is 1.7 inches and the fourth needle is 0.3 inches.
Compensation will be made for stitches that are short in length. Note that the stitches may be taken in starting from the stitch immediately after the short stitch, and this will become clear from the description later.

FIG. 1 is an overall system diagram of each of the flowcharts shown in FIGS. 2 to 5, and FIG. The enlargement of the block indicated by code C is shown in FIG. 3, the enlargement of the block indicated by code C is shown in FIG.
As shown in the figure. Prior to embroidery, a punching tape is set in the tape reader 30, the embroidery data held on the tape is read, and the embroidery data is stored in the first memory M1 in its entirety without scattering. Further, it is assumed that the required work cloth is set in the embroidery frame 16 in a developed state.

(Especially regarding the development in FIG. 2) After the above preparations are completed, as shown in FIG. 2, the memory operation of the embroidery machine is started. Even if the embroidery machine is operated in step 101 (hereinafter "step" is abbreviated as "S"),
A minimum stitch length ZJ (for example, 0.3 Irtn) that will prevent the needle from dropping multiple times on the same location on the work cloth is set and stored in the element RAM via the operation panel 18.

Further, in 5102, initial setting is performed to match the n address of the first memory M1 with the m address of the second memory M2 (n =
m←1), and in 5103, the first memory M
The contents of the embroidery data stored in 1 are read into the second memory M2 for each stitch (reading data for the nth stitch)
.

Here, check whether the function data is an end code with 5104, and if it is the previous run (YES), 8
The process moves to step 108, stores the data as it is at address m in the second memory M2, and ends the process. If the answer is negative (NO), the process moves to the next step 8105 to check whether the function d of the XY data stored in the first memory M is larger than the minimum stitch length Z.

In the case of portrait, that is, if the function d is larger than the minimum stitch length Z, the process moves to 5109 and the corresponding X-Y data is
Store at address m in memory M2. Then, in 5110, address m of the second memory M2 is updated to address (m+1), and in 5111, the original address of the first memory M1 is updated, that is, n
Update the address to address (n+1).

The state of each stitch embroidered along the route 5102→5109 to 5111 is illustrated in FIG. 10(a). Here, the nth stitch, the (n+1) stitch after the first stitch, and the (n+1) stitch after the second stitch.
+2) Each stitch length of each stitch is the minimum stitch length of 2.
It is larger than.

Therefore, here, the X/Y data read from the first memory M1 is transferred to the second memory M□ without any modification.
is stored in

The problem arises when the above-mentioned 8105 is negative, that is, the function d of the X-Y data in the first memory M0
is determined to be smaller than the minimum stitch length Z, in 8106, the contents of (n+1) in the first memory M□ are read and the contents of the next stitch are checked. Check. As a result, the X-Y data regarding (n+1) in the first memory M is known, so if the function d of this X-Y data is greater than the minimum stitch length Z, the shortfall in the previous stitch can be You will have to decide whether you can afford to give.

(Regarding Stitch Direction Determination) However, during embroidery sewing, the sewing direction of each stitch is not necessarily the same, but changes randomly between forward and reverse. Therefore, in the next step 8107, it is necessary to confirm whether the direction of the stitch from the nth stitch to the (n+1)th stitch is the forward direction (F) or the reverse direction (R). Here, forward direction (F) and reverse direction (R) are relative concepts and are determined for convenience. Therefore, in this embodiment, in the X-YR mark in FIG. 11, the X data and Y data in a specific quadrant, and the
The case where the polarity of both the data and the Y data is opposite is referred to as a reverse direction (R).

In other words, in the above coordinates, the polarity of the X-Y data in the first quadrant is positive (+), but the polarity of the X-Y data in the third quadrant is positive (+).
Since the polarity of the data is negative (=), the stitching directions in the first and third quadrants are "opposite". Also, in the second quadrant, the data polarity is Y is positive (+) and X is negative (-), whereas in the fourth quadrant, the data polarity is Y
Since is negative (-) and X is positive (+), the stitch direction is also "reverse" here as well. But #1
the limit and the second quadrant, the second quadrant and the third quadrant, the first quadrant and the fourth quadrant
In the quadrant, and in the third and fourth quadrants, the polarity of each corresponding X-Y data is opposite only on either side of the X-Y side, so the stitching direction is "positive" between these quadrants. . In any case, this stitch direction is
- It is easily determined in step 5107 based on the polarity determined in the Y data.

(Especially regarding the development in Fig. 3) If it is determined in step 5107 that the stitch direction is the reverse direction (R), the process proceeds to Fig. 3 which defines the flow for processing the stitch before the nth stitch, and It is checked in 5112 whether the nth stitch is the first stitch or not. The reason is that the n stitch is 1
This is because when it is a stitch, there are no stitches before it, and therefore the missing length cannot be taken in from the stitches on the front side. When the 8112 determines that the n-th stitch is the first stitch, the process proceeds to (2) in the flowchart of FIG. 4, which will be described later. If 8112 denies that the nth stitch is the first stitch, then in the next 8113, (m-1
) is read. This (m-1) is the one that replaced the first memory M1 with the second memory M2 in the previous process, and is always larger than the minimum stitch length Z ((m-1)>Z). The read contents are temporarily stored in a register in the central processing unit CPU.

Here, the direction of (n+1) is reversed (R), so
In step 5114, as shown in FIG. 10(b), a circle having a radius of the minimum stitch length Z is drawn using coordinates with the origin at point n. Then, the (m-1) point one stitch before the n-th stitch and the (m-2) point two stitches ahead are connected with a straight line, and the intersection C between this straight line and the circle of radius 2 is determined. In this case, the intersection point C is not necessarily found, and there are cases where the intersection point cannot be found, for example, as shown in FIG. 10(d). Therefore, 5115
The presence or absence of the intersection point C is checked in 5120, and if the intersection point is denied as "absent", the process moves to 5120 and it is checked whether the function of the nth stitch in question is stopped.

If it is determined that it is a stop code, ■ in Figure 2
Returns to step 3, and if it is denied that it is not a stop code, the process moves to step 2 in FIG. 4, which will be described later.

If 5115 indicates that the intersection C “exists”, then
Proceed to the next step 8116, and as shown in FIG. 10(b)
2) to find the straight line γ leading to the intersection C. Then, in the next 8117, the straight line γ is hk/J.

Check whether it is greater than (or equal to) the stitch length Z (γ≧Z). As shown in FIG. 10(b), if the straight line γ is greater than but equal to the minimum stitch length Z, 8118
Then, the component of the straight line γ is stored in (m-1) of the second memory M2. Next, in step 5119, the components of the straight line S connecting the intersection point C and point n are determined, and then the process returns to step 2 in FIG. 2, and the obtained X-Y data is stored in address m of the second memory M2 in step 5109. .

In addition, in the previous step 8117, if it is denied that the straight line γ is smaller than the minimum stitch length Z (γ<Z), for example, in Fig. 10 (Q
), the process moves to 5121 and it is checked whether the function of the n-th stitch is stopped. If it is determined that it is a stop code, the process returns to (2) in FIG. 2, and if it is denied that it is not a stop code, the process moves to (2) in FIG. 4, which will be described later.

(Especially regarding the development in FIG. 4) Next, if the stitch direction is determined to be the forward direction (F) in step 8107, the process proceeds to FIG. 4 regarding the flow for processing stitches after the n-th stitch. And at 5122, (n+
1) Check whether the stitch length d of the stitch is larger than (or equal to) the minimum stitch length Z (d≧Z). If this is denied, the process moves to (2) in FIG. 5, which will be described later. Furthermore, if it is determined that the stitch length d is greater than or equal to the minimum stitch length Z, then in 5123, as shown in FIG.
As shown in the figure, in coordinates with the point (m-1) as the origin, a circle is drawn with a radius of the minimum stitch length Z centering on this point.

Point n and point (n+1) are then connected with a straight line, and the intersection C between this straight line and the circle of radius Z is determined. In this case as well, it is not always possible to find the intersection point C.

Check the presence or absence of the intersection point C at the next 8124, and see Figure 10 (h).
If there is no intersection as in the case shown in FIG.

If the existence of the intersection C is added to 5124, the linear 812
5, the coordinates of this intersection C are stored in address m of the second memory M2. Then, in step 5126, as shown in Figure 10(e), find the straight line α from the intersection C to (n + 1).In step 5127, check whether the straight line α is greater than (or equal to) the minimum stitch length Z. Check (α≧Z
). As shown in FIG. 10(e), if the straight line α is greater than or equal to the minimum stitch length Z, in 5128 the component of the straight line α is stored in (m+1) of the second memory M2. Then, in 5129, the original address of the first memory M, that is, address n, is updated to address (n+1), and the second memory υM2 is updated.
Update address m to address (m+1). See you next 512
7, if the straight line α is smaller than the minimum stitch length Z (α<Z) as shown in FIG. n
+1) address, and the m address of the second memory M2 is updated to the (m+1) address.

(Especially regarding the development in Fig. 5) At 8122 in Fig. 4, if it is denied that the stitch length d of the (n+1) stitch is smaller than the minimum stitch length 2 (d < Z), the stitch length d of the (n+1) stitch is The missing amount cannot be taken in from the stitches. In this case, the process moves to step 5 in FIG. 5, and in step 5131, the stitch length β from the (m'-1) point to the (n+1) point is determined. Then at 5132,
Check whether the stitch length β is greater than (or equal to) the minimum stitch length Z (β≧Z). and stitch length β
If it is found that is greater than or equal to the stitch length Z, the process proceeds to the first order 8133, and as shown in FIG. 10(f), (
At the coordinates with the point m-1) as the origin, draw a circle with the radius of the minimum stitch length Z, and draw a circle at the (m,-1)n point and (n+1)
Find the intersection C between the straight line connecting the points and the circle with radius Z.

After that, the process advances to 5134, and the coordinates of the intersection C are stored in the second memory M2.
After storing the data at address m in 5135, a straight line δ from the intersection C to (n+1) is determined as shown in FIG. 10(f). And at 8136, the straight line δ is the minimum stitch length Z
Check if it is greater than (or equal to) (δ≧Z)
. As a result, if the straight line δ is greater than or equal to the minimum stitch length Z, then in 5137 the component of the straight line δ is stored in (m + 1) of the second memory M2. Then, at 8138, address n of the first memory M□ is updated to address (n+1), and address m of the second memory M2 is updated to (m+1).
．． ) update to the street address. Further, in the previous step 8136, if the straight line δ is smaller than the minimum stitch length Z (δ<Z), this is negated and the process moves to 8146, where the n address of the first memory M1 is updated to the (n+1) address, and Second memory M2
Update address m to address (m+1).

If the stitch length β is found to be smaller than the minimum stitch length 2 in the previous step 8132, the process moves to 5139, where the original address of the first memory M, that is, address n, is updated to address (n+1). .

Then, in 5140, the contents of the embroidery data stored in the first memory M1 are read into the second memory M2. Here, it is checked in 5141 whether the function data is an end code, and if not, the process moves to 5143, where the component of β is stored in address m of the second memory M2, and the process ends. If 5141 is negative, the next S ],
42 and check if it is a stop code. If negative here, the process moves to 5144 to store the component of β at address m of the second memory M2, and further, in the next step 8145, address n of the first memory M is updated to address (n+1),
Address m of the second memory M2 is also updated to address (m+1).

If the result in 5142 is negative, the process returns to step 2 in FIG. 5 and repeats the steps from 5131.

In this embodiment, the case where two memories, namely, the first memory M1 and the second memory M2 are used, has been described, but this is for convenience of explanation, and in reality, the memory is read from the memory. Data processing is performed at the time the data is output to the pulse motor driver. Further, tape operation is performed while reading the punching tape without using a memory, and therefore, the stitch length compensation method for an embroidery machine according to the present invention should be understood as including both of these. It is.

Effects of the Invention As explained above, according to the stitch length compensation method for an embroidery machine according to the present invention, data regarding stitch length, etc. held in a medium such as punching tape is read into the control system, and the embroidery frame and needle bar are independently operated. In an embroidery machine that is driven automatically to embroidery a desired shape on a workpiece cloth, even if there are extremely short stitches in a series of stitches, the short stitches will be detected from the stitches that have sufficient length before and after the stitches. Since the needle length can be compensated for by taking in the length, it is possible to prevent the needle from dropping multiple times at approximately the same location on the work cloth. Therefore, occurrence of thread breakage is effectively prevented, resulting in unexpected stoppage of the embroidery machine during operation, waste of upper thread, and loss of bobbin thread due to stitchback in other embroidery heads that do not cause thread breakage. Beneficial benefits are obtained, such as eliminating waste and product loss and increasing overall production efficiency.

[Brief explanation of drawings]

FIG. 1 is an overall system diagram of each flowchart adopted in an embroidery machine that can suitably implement the stitch length compensation method according to the present invention, and FIGS. 2, 3, 4, and 5 are FIG. 6 is a schematic diagram of a storage element RAM divided into a first memory M1 and a second memory M2, and FIG. A general control system diagram of an embroidery machine with a built-in computer. FIGS. 8(a) and 8(b) are explanatory diagrams showing the state in which each stitch has long and short lengths. FIG. 9 is an explanatory diagram showing the relationship between X data pattern, Y data, and stitch length d. Figure 10 (
Figures a) to 10(h) are explanatory diagrams showing the direction and length of each stitch in relation to a circle whose radius is the minimum stitch length Z. FIG. 3 is an explanatory diagram showing that the polarities of X data and Y data are different in the quadrant of FIG. 16...Embroidery frame 26...X-axis pulse motor 28...Y-axis pulse motor 30...Tape reader 32...Tape reader interface 34...Spindle motor CPU U...Central processing unit ROM ...Memory element

Claims (1)

[Scope of Claims] X/Y data and function data that define the length of each stitch necessary to perform embroidery stitching of a desired shape are held in a medium, and the data held in this medium is read and an embroidery frame is created. and a control system that gives required commands to each drive system of the needle bar, and according to the command from the control system, drives the embroidery frame to an arbitrary position in plane coordinates and reciprocates the needle bar up and down, In an embroidery machine that performs embroidery stitches on a workpiece cloth set in the embroidery frame, a minimum stitch length that can perform effective embroidery stitches is set with respect to the length of the stitches, and the length of each stitch of the data read from the medium is set. is compared with the minimum stitch length, and if the stitch length is shorter than the minimum stitch length, calculate the shortened length from the stitches that are located before or after the relevant stitch and have an extra length than the minimum stitch length. A stitch length compensation method for an embroidery machine, characterized in that the stitch length is taken into account.