CN110761004A - Method and device for calculating remaining length of bottom line - Google Patents
Method and device for calculating remaining length of bottom line Download PDFInfo
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- CN110761004A CN110761004A CN201810843748.6A CN201810843748A CN110761004A CN 110761004 A CN110761004 A CN 110761004A CN 201810843748 A CN201810843748 A CN 201810843748A CN 110761004 A CN110761004 A CN 110761004A
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
- D05B59/02—Devices for determining or indicating the length of thread still on the bobbin
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2305/00—Operations on the work before or after sewing
- D05D2305/32—Measuring
- D05D2305/34—Counting
Abstract
The invention relates to a method for calculating the remaining length of a bottom thread and a device thereof, which are applied to a sewing machine capable of automatically performing sewing operation.
Description
Technical Field
The invention relates to a method and a device for calculating the remaining length of a bobbin thread, in particular to an automatic sewing machine device which can be used for automatically replacing a bobbin.
Background
As a CNC processing machine applied to the industrial field, in the field of sewing machines, sewing machines capable of automatically sewing, stopping a needle or cutting a thread according to a pattern trajectory set by a user have been developed, and in such sewing machines, it is a problem to be solved how to prevent a waste product or a time-consuming repair from being caused by exhaustion of a bobbin thread used in the automatic sewing process.
In order to solve the above problems, the methods adopted by the automatic sewing machines in the market at present include a method of calculating the amount of the bobbin thread used by using the number of sewing needles, and a method of determining the bobbin thread allowance by installing a sensor on the sewing machine to monitor the number of rotations of the bobbin thread or detect the thickness of the bobbin thread.
However, the method of calculating the amount of the bottom thread using only the number of the needles must ensure that the stitch length of each needle and the thickness of the material to be sewn are consistent, otherwise, the calculation error will be generated; the method of monitoring the coil by using the sensor needs to install the sensor on the sewing machine table and specially manufacture parts for matching with the sensor, thereby increasing the cost of the equipment.
Disclosure of Invention
In order to solve the technical problem, the invention aims to: a method for calculating the remaining length of bobbin thread is disclosed, which can make the user know when the bobbin needs to be replaced when an automatic sewing machine is used, and it is not necessary to install another sensor on the original sewing machine.
The present invention is also directed to a method for calculating the remaining length of the bobbin thread, which can calculate the remaining length of the bobbin thread or the used length of the bobbin thread according to the user's requirement.
A secondary object of the present invention is to provide a sewing machine capable of calculating a remaining amount of a bobbin thread length, which enables a user to know when the bobbin needs to be replaced when using an automated sewing machine.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
a method for calculating the remaining length of a bottom line comprises the following steps: the method is characterized in that: comprises the following steps:
an obtaining step of obtaining a minimum remaining length, a total length of the bobbin thread, a length of a current state of sewing, and a next sewing length required for sewing a default pattern;
a decision value generating step for generating a first decision value and a second decision value using the minimum remaining length, the current state length and the next sewing length;
a judging and reminding step, comparing the first judging value with the second judging value, generating a reminding message when the first judging value is larger than the second judging value, and updating the value of the current state length when the first judging value is smaller than the second judging value.
In the method for calculating the remaining length of the bobbin thread, the first judgment value is generated by adding the length of the next section of sewing to the length of the current state; the second determination value is generated by subtracting the minimum remaining length from the total bottom line length.
In the method for calculating the bottom line residual length, the first judgment value is directly generated by the minimum residual length; the second determination value is generated by subtracting the next sewing length from the current state length.
The calculation method of the remaining length of the bottom thread is characterized in that the calculation of the next section of sewing length is generated by calculating the stitch length of the default pattern and the set value of the height of the middle presser foot when the default pattern is sewn.
The method for calculating the remaining length of the bottom thread comprises the step of calculating the next sewing length, wherein the calculation of the next sewing length also comprises the length of a thread head generated by thread cutting action before a sewing path is sewn and after the sewing path is finished.
The method for calculating the remaining length of the bottom thread comprises the following steps that the default pattern comprises at least one stitch part, and the calculation formula of the next sewing length is as follows:
Lseam＝ΣLs+H+Bwaste
wherein Lseam is equal to the next sewing length; ls is equal to the required bobbin thread length of the eye sewing part; h is equal to the set value of the height of the middle presser foot; bwaste equals one stub length.
The method for calculating the remaining length of the bottom thread comprises the following steps that the default pattern comprises at least one stitch part and at least one moving part, and the calculation formula of the next section of sewing length is as follows:
Lseam＝ΣLs+ΣLm+H+Bwaste
wherein Lseam is equal to the next sewing length; ls is equal to the required bobbin thread length of the eye sewing part; lm is equal to the required bobbin thread length of the moving part; h is equal to the set value of the height of the middle presser foot; bwaste equals one stub length.
The calculation method of the remaining length of the bottom thread is characterized in that the calculation of the next section of sewing length also comprises a correction coefficient.
The method for calculating the remaining length of the bottom thread comprises the step of calculating the remaining length of the bottom thread, wherein the default pattern comprises at least two different set values of the height of the middle presser foot according to the thickness change of materials during sewing.
An apparatus for calculating a remaining length of a bobbin thread, using the method for calculating a remaining length of a bobbin thread, comprising: comprises the following steps:
a sewing machine capable of automatically performing sewing operation according to the setting;
at least one input device connected to the sewing machine for inputting the minimum remaining length, the total length of the bobbin thread, and a sewing parameter required for generating the next sewing length;
the memory module is connected with the sewing machine and is used for recording the length of the current state;
a calculation module, connected to the input device and the memory module, for calculating the next sewing length after obtaining the sewing parameters, and generating the first determination value and the second determination value after obtaining the minimum remaining length, the total bottom line length, the next sewing length and the current state length;
the judging module is connected with the calculating module and the memory module and used for generating a reminding message or updating the numerical value of the current state length through the first judging value and the second judging value and transmitting the reminding message or updating the numerical value of the current state length to the memory module;
an output device for receiving the reminding message and displaying or generating a reminding signal.
An apparatus for calculating a remaining length of a bobbin thread, which is adapted to a sewing machine capable of sewing in accordance with a set path, said apparatus using said method for calculating a remaining length of a bobbin thread, characterized in that: comprises the following steps:
at least one input device for inputting the minimum remaining length, the total length of the bobbin thread and sewing parameters required for generating the next sewing length;
a memory module for recording the length of the current state;
a calculation module, connected to the input device and the memory module, for calculating the next sewing length after obtaining the sewing parameters, and generating the first determination value and the second determination value after obtaining the minimum remaining length, the total bottom line length, the next sewing length and the current state length;
and the judging module is connected with the calculating module and the memory module and used for generating a reminding message or updating the numerical value of the current state length through the first judging value and the second judging value and transmitting the reminding message or updating the numerical value of the current state length to the memory module.
Compared with the prior art, the invention adopting the technical scheme has the advantages that: a method for calculating the residual length of bottom thread includes such steps as calculating the minimum residual length of bottom thread, the total length of bottom thread, the current state length of bottom thread, the number of stitches, the height of middle presser foot, the residual length of pattern to be automatically sewn, the sewing length generated by the correction coefficient needed by sewing thread or material, judging if the residual length of bottom thread is greater than the second one, and sending out signal or prompting user.
Drawings
FIG. 1 is a schematic view of a preferred embodiment of the bobbin thread residue length apparatus of the present invention;
FIG. 2 is a schematic diagram showing the operation of the apparatus in the embodiment of FIG. 1;
FIGS. 3A to 3C are schematic views illustrating how to calculate the next sewing length in the embodiment of FIG. 2;
fig. 4A and 4B are schematic views illustrating the operation of the presser foot in the embodiment of fig. 1.
Description of reference numerals: 10-a sewing machine; 11-a needle; 12-middle presser foot; 121-lowest point; 13- -needle board; 131-needle plate surface; 14-separation distance; 20-a computing device; 21-an input device; 22-a memory module; 23-a calculation module; 24-a decision module; 25-an output device; 30-stitches; 31-bottom line; 311-bobbin; 40-mesh sewing; 41-a moving part; 50-stitch length; 501-moving distance; 51-thickness; 511-a first thickness; 512-second thickness; 52-tangent line; 521-initial thread end length; 522-end stub length; 60-a first region; 61-second area.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings, the advantages and features of which will become apparent as the description proceeds.
Referring to fig. 1 to 2, in an embodiment of the method for calculating the remaining length of the bobbin thread according to the present invention, the method is performed by a sewing machine 10 capable of automatically performing a sewing operation according to a setting and a calculating device 20 connected (or built-in) to the sewing machine 10.
First, regarding the parts of the sewing machine 10, the present invention is not particularly limited to the sewing machine 10, and can be applied to various types of sewing machines; with respect to the portions of the computing device 20: as shown in fig. 1, in the present embodiment, the computing device 20 connected to the sewing machine 10 includes an input device 21, a memory module 22, a computing module 23, a determining module 24 and an output device 25.
The input device 21 is used to input sewing parameters such as the minimum remaining length of a bobbin thread, the total length of a bobbin thread, the length of a thread end, etc., and data of a default pattern.
The default pattern comprises a plurality of sewing paths and a plurality of tangent points, and each sewing path consists of a plurality of needle drop point coordinates and comprises a middle presser foot height set value; wherein, the data of stitch length can be obtained by calculating the distance between needle drop points; the minimum remaining length of the bottom line is the minimum length required for retaining the bottom line in consideration of calculation errors; the total bobbin thread length is the total length of the bobbin thread wound around the bobbin 311 (see fig. 4A); for a detailed description of the sewing parameters, reference is made to the following description.
The memory module 22 is configured to obtain a current state length, wherein the current state length may be two values with different meanings according to differences of the determination methods in different embodiments, please refer to the following description in detail.
The calculation module 23 calculates a next sewing length after acquiring the data of the sewing parameters and the default pattern, where the next sewing length is a length of a bobbin thread required by the sewing machine 10 for a next sewing operation according to the path data, generates a first determination value and a second determination value after acquiring the minimum remaining length, the total length of the bobbin thread, the next sewing length, and the current state length, and transmits the first determination value and the second determination value to the determination module 24.
The judging module 24 is connected to the calculating module and the memory module, and generates a reminding message according to the magnitude relationship between the first judging value and the second judging value after receiving the first judging value and the second judging value, or generates an updating message to update the value of the current state length, and transmits the updated current state length to the memory module 22.
The output device 25, after receiving the reminding message from the determination module 24, displays and generates a reminding signal to let the user know that the bobbin thread length on the bobbin 311 is insufficient; specifically, in the present embodiment, the output device 25 may include a screen for displaying a warning sign and a buzzer (not shown) for sounding a warning sound.
As can be seen from the above description and drawings, the hardware device to which the method for calculating the remaining length of the bobbin thread provided by the present invention is applied may be the sewing machine 10 including the calculating device 20, or may be only the calculating device 20 externally connected to the sewing machine 10.
Referring back to fig. 1, in the present embodiment, the calculating device 20 determines whether to send the reminding signal by calculating whether the sum of the length of the bobbin thread (the length of the bobbin thread away from the bobbin 311) used in the sewing process that has been executed and the length of the bobbin thread expected to be needed for the next sewing process is greater than the difference between the total length of the bobbin thread and the minimum remaining length of the bobbin thread (the first method). However, the present invention also provides another calculation method (second method) different from the first method, in another embodiment using the second method, the calculation device 20 determines whether to send out the reminding signal by calculating whether the remaining amount of the bobbin thread remaining on the bobbin 311 is larger than the minimum remaining length of the bobbin thread after calculating the required bobbin thread length when executing the next sewing procedure; and the calculation result is the same whether the first method or the second method is used. For convenience of description, the following description will be made of an embodiment of a method for performing the first method.
As shown in fig. 1, when the first method is executed to monitor a sewing program, firstly, in an obtaining step, the calculation module 23 first generates the next sewing length by the sewing parameters and the sewing path through the minimum remaining length, the total length of the bobbin thread in the bobbin 311, the thread end length and other sewing parameters inputted by the input device 21; and obtaining the current state length from the memory module 22; in the first embodiment, the current status length is the length of the bobbin thread used for sewing, so that the initial value of the current status length is set to 0 when the monitoring is started.
Then, in a decision value generating step, a first decision value and a second decision value are obtained according to the minimum remaining length, the next sewing length and the current state length (and are transmitted to the decision module 24), wherein, as described above, in the first method, the first decision value is a value generated by adding the current state length to the next sewing length, and the second decision value is a value generated by subtracting the minimum remaining length from the total bottom line length.
Then, in the determination reminding step, after the determination module 24 receives the first determination value and the second determination value, the magnitude relationship between the first determination value and the second determination value is compared; when the first determination value is greater than the second determination value, since such a result indicates that the length of the unused bobbin thread is insufficient to be scheduled for the next sewing procedure, the determination module 24 generates a warning message and transmits the warning message to the output device 25 to send out the warning message, and when the first determination value is less than the second determination value, the sewing machine 10 executes the next sewing procedure, and after the sewing procedure is executed, updates the value of the current state length by adding the value of the current length to the value of the sewing length, and stores the value in the memory module 22.
In addition, as mentioned in the above paragraphs, another method for calculating the remaining bobbin thread length (the second method) is also provided, in which the method determines whether to issue the reminding signal by calculating whether the remaining bobbin thread length remaining on the bobbin 311 is greater than the minimum remaining bobbin thread length required for executing the sewing process.
Thus, when using the second method, the initial value of the present length is equivalent to the total baseline length; in the step of generating the judgment value, the first judgment value is directly obtained from the minimum remaining length, and the second judgment value is obtained by subtracting the next sewing length from the current state length; and updating the value of the current state length by subtracting the value of the sewing length from the value of the current length when updating the current state length in the judging and reminding step.
Finally, as to the manner of generating the next sewing length mentioned in the above description of the first and second methods, please refer to the following description with reference to fig. 3A to 4B:
as shown in FIG. 3A, in the actual sewing process of the sewing machine 10, a plurality of layers of materials are combined together to form a plurality of stitch portions 40 by mainly passing a bottom thread 31 and a needle thread 30 through the materials with a thickness 51 along a fixed distance and interlacing each other; therefore, in order to calculate the base thread length (base thread length Ls of the stitch portion) required for forming the single stitch portion 40 in fig. 3A, the correction coefficient C1 is included in the sewing parameters input in the obtaining step, and the stitch length 50 (each stitch length is not necessarily equal) of each stitch portion 40 in the sewing path and the middle presser height setting value H are obtained.
Wherein, as for the set value H of the height of the middle presser foot, please refer to fig. 4A and 4B, in the sewing process, except that a needle 11 of the sewing machine 10 performs the up-and-down reciprocating stroke, in order to fix the position of the material to be sewn, a middle presser foot 12 of the sewing machine 10 moves towards the material before the needle 11 passes through the material, and clamps the material together with a needle plate 13 of the sewing machine 10, and then is far away from the material after threading, so the set value H of the height of the middle presser foot is a distance 14 between a lowest point 121 when the middle presser foot 12 contacts the material and a needle plate surface 131 of the needle plate 13 in the reciprocating stroke, and the set value H of the height of the middle presser foot can be set slightly smaller than the thickness 51, and in addition, as shown in fig. 3C, when calculating the length Ls of the bottom thread, due to the variation of the material thickness in the sewing path, the length of the bottom thread 31 consumed by the areas with different material thicknesses is different, for example, the first area 60 (with a first thickness 511) and the second area 61 (with a second thickness 512), so the middle presser foot height set value H of different areas can also correct the calculated value of the bottom thread length; the correction coefficient C1 is a coefficient for correcting the length of the bobbin thread actually used by the eye part 40 in order to obtain an accurate calculated length, in response to the tension of the bobbin thread, the elasticity of the thread, or the hardness of the material to be sewn, as the correction coefficient C1; the calculation of the length of the base line required for each of the stitch portions 40 can be expressed as:
the bobbin thread length Ls of the stitch portion 40 is (stitch length 50+ center presser height setting value H) ((1 + correction coefficient C1))
Here, since the bottom thread 31 and the needle thread 30 are usually knotted to each other at the middle position of the thickness 51, and the length of the bottom thread 31 used for the penetration of the material is calculated to be equivalent to the length of the material which is penetrated to the middle point and then folded back, the input set value H of the height of the middle presser foot is the thickness 51 of the material through which the bottom thread 31 is penetrated.
In addition, as shown in fig. 3B, since the thread cutting operation is not necessarily performed between each sewing path during the sewing of the pattern, but the moving needle is directly moved by a moving distance 501 greater than the stitch length 50 to generate a moving portion 41, when calculating the next sewing length, the thread cutting operation is performed to the next time as the basis for calculating the overall length, and the bobbin thread length Lm consumed by the moving portion 41 and the correction coefficient C2 applied to the moving portion, which may be formed during the moving process, are considered; wherein the correction coefficient C2 is the correction coefficient for correcting the length of the bobbin thread actually used by the moving part 41 in order to obtain an accurate calculated length in response to the tension, elasticity or hardness of the bobbin thread; the calculation of the base line length required for the moving part 41 can be expressed as:
the base line length Lm of the moving unit 41 is the moving distance 501 (1+ correction coefficient C2)
In addition to the bobbin thread length Ls of the stitch portion 40, in the pattern of fig. 3A, the bobbin thread 31 needs to be threaded through the material again at the end of the stitch in addition to the bobbin thread 31 needed to be threaded through the material at the beginning of the stitch, so that the set value H of the height of the middle presser foot needs to be added again at the end of the formula when calculating the next length of the stitch required to form fig. 3A;
in addition, as shown in fig. 3A, during the sewing process, since the sewing thread needs to be cut before the next sewing process is performed, the sewing parameters further include a thread end length Bwaste obtained by adding a start thread end length 521 from the tangent 52 to the starting point of the sewing path and an end thread end length 522 from the end point of the sewing path to the tangent 52.
Therefore, in summary of the above description, the calculation formula of the next sewing length Lseam required in the situation without the moving part 41, such as in fig. 3A, can be expressed as:
the next sewing length Lseam is the total of the base thread length required by all the sewing parts 40, Σ Ls + the middle presser height setting value H + the thread end length Bwait
In the case of fig. 3B including both the stitch portion 40 and the moving portion 41, the next sewing length Lseam required can be calculated as:
the next sewing length Lseam is the total of the base thread lengths Σ Ls required for all the stitch portions 40 + the total of the base thread lengths Σ Lm required for all the moving portions 41 + the middle presser height setting value H + the thread end length Bwaste
Finally, the present invention is not limited to the details of the formula used for calculating the next sewing length, and those skilled in the art should be able to change the contents of the above formula according to the general knowledge.
The foregoing description and examples are exemplary only, and are not intended to limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (11)
1. A method for calculating the remaining length of a bottom line is characterized by comprising the following steps: comprises the following steps:
an obtaining step of obtaining a minimum remaining length, a total length of the bobbin thread, a length of a current state of sewing, and a next sewing length required for sewing a default pattern;
a decision value generating step for generating a first decision value and a second decision value using the minimum remaining length, the current state length and the next sewing length;
a judging and reminding step, comparing the first judging value with the second judging value, generating a reminding message when the first judging value is larger than the second judging value, and updating the value of the current state length when the first judging value is smaller than the second judging value.
2. The method of claim 1, wherein: the first judgment value is generated by adding the next sewing length to the current state length; the second determination value is generated by subtracting the minimum remaining length from the total bottom line length.
3. The method of claim 1, wherein: the first determination value is directly generated from the minimum remaining length; the second determination value is generated by subtracting the next sewing length from the current state length.
4. The method of claim 1, wherein: the next sewing length is calculated by calculating the stitch length of the default pattern and the set value of the height of the middle presser foot when the default pattern is sewn.
5. The method of claim 4, wherein: the calculation of the next sewing length further comprises a thread end length generated by thread cutting action before starting sewing a sewing path and after finishing the sewing path.
6. The method of claim 5, wherein: the default pattern comprises at least one sewing mesh part, and the calculation formula of the next sewing length is as follows:
Lseam＝ΣLs+H+Bwaste；
wherein Lseam is equal to the next sewing length; ls is equal to the required bobbin thread length of the eye sewing part; h is equal to the set value of the height of the middle presser foot; bwaste equals one stub length.
7. The method of claim 5, wherein: the default pattern comprises at least one sewing mesh part and at least one moving part, and the calculation formula of the next section of sewing length is as follows:
Lseam＝ΣLs+ΣLm+H+Bwaste；
wherein Lseam is equal to the next sewing length; ls is equal to the required bobbin thread length of the eye sewing part; lm is equal to the required bobbin thread length of the moving part; h is equal to the set value of the height of the middle presser foot; bwaste equals one stub length.
8. The method of claim 4, wherein: the calculation of the next sewing length further comprises a correction factor.
9. The method of claim 4, wherein: the default pattern includes at least two different set values of the center presser height.
10. An apparatus capable of calculating a bobbin thread residual length, using the bobbin thread residual length calculating method according to any one of claims 1 to 9, characterized in that: comprises the following steps:
a sewing machine capable of automatically performing sewing operation according to the setting;
at least one input device connected to the sewing machine for inputting the minimum remaining length, the total length of the bobbin thread, and a sewing parameter required for generating the next sewing length;
the memory module is connected with the sewing machine and is used for recording the length of the current state;
a calculation module, connected to the input device and the memory module, for calculating the next sewing length after obtaining the sewing parameters, and generating the first determination value and the second determination value after obtaining the minimum remaining length, the total bottom line length, the next sewing length and the current state length;
the judging module is connected with the calculating module and the memory module and used for generating a reminding message or updating the numerical value of the current state length through the first judging value and the second judging value and transmitting the reminding message or updating the numerical value of the current state length to the memory module;
an output device for receiving the reminding message and displaying or generating a reminding signal.
11. A device for calculating a remaining length of a bobbin thread, which is used in a sewing machine capable of sewing according to a set course, using the method for calculating a remaining length of a bobbin thread according to any one of claims 1 to 9, wherein: comprises the following steps:
at least one input device for inputting the minimum remaining length, the total length of the bobbin thread and sewing parameters required for generating the next sewing length;
a memory module for recording the length of the current state;
a calculation module, connected to the input device and the memory module, for calculating the next sewing length after obtaining the sewing parameters, and generating the first determination value and the second determination value after obtaining the minimum remaining length, the total bottom line length, the next sewing length and the current state length;
and the judging module is connected with the calculating module and the memory module and used for generating a reminding message or updating the numerical value of the current state length through the first judging value and the second judging value and transmitting the reminding message or updating the numerical value of the current state length to the memory module.
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| CN201810843748.6A CN110761004A (en) | 2018-07-27 | 2018-07-27 | Method and device for calculating remaining length of bottom line |
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| CN201810843748.6A CN110761004A (en) | 2018-07-27 | 2018-07-27 | Method and device for calculating remaining length of bottom line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111636155A (en) * | 2020-06-09 | 2020-09-08 | 拓卡奔马机电科技有限公司 | Buttonhole bottom line consumption calculation method of buttonholing machine |
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| JP2016154723A (en) * | 2015-02-25 | 2016-09-01 | 東海工業ミシン株式会社 | Sewing machine and program |
| CN105970505A (en) * | 2016-07-16 | 2016-09-28 | 杰克缝纫机股份有限公司 | Method and device for controlling residual thread length of bobbin of sewing machine |
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- 2018-07-27 CN CN201810843748.6A patent/CN110761004A/en active Pending
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| TW442588B (en) * | 1999-07-13 | 2001-06-23 | Singer Co Nv | Apparatus and method for monitoring consumption of sewing thread supply |
| JP2002248291A (en) * | 2002-01-18 | 2002-09-03 | Janome Sewing Mach Co Ltd | Sewing machine with bobbin thread requirement operating function |
| JP2016154723A (en) * | 2015-02-25 | 2016-09-01 | 東海工業ミシン株式会社 | Sewing machine and program |
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| CN111636155A (en) * | 2020-06-09 | 2020-09-08 | 拓卡奔马机电科技有限公司 | Buttonhole bottom line consumption calculation method of buttonholing machine |
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Application publication date: 20200207 |