CN108660625B - Seam reinforcement parameter calculation method, control system applying seam reinforcement parameter calculation method and sewing machine - Google Patents
Seam reinforcement parameter calculation method, control system applying seam reinforcement parameter calculation method and sewing machine Download PDFInfo
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- CN108660625B CN108660625B CN201810433145.9A CN201810433145A CN108660625B CN 108660625 B CN108660625 B CN 108660625B CN 201810433145 A CN201810433145 A CN 201810433145A CN 108660625 B CN108660625 B CN 108660625B
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- D05—SEWING; EMBROIDERING; TUFTING
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Abstract
The invention provides a seam reinforcement parameter calculation method, a control system applying the same and a sewing machine. The method comprises the following steps: firstly, acquiring a cloth thickness value and a needle pitch set value; secondly, calculating according to the cloth thickness value to obtain a cloth thickness coefficient, and acquiring electromagnet suction time and electromagnet release time corresponding to the needle pitch set value; thirdly, calculating to obtain a pull-in compensation angle value and a release compensation angle value; fourthly, calculating to obtain an electromagnet suction initial angle and an electromagnet release initial angle. The invention can automatically detect the needle pitch and the cloth thickness, and automatically calculate the seam reinforcement parameter according to the detected needle pitch and the cloth thickness, thereby reducing the manual operation and greatly improving the working efficiency.
Description
Technical Field
The invention relates to the field of sewing machines, in particular to a seam reinforcement parameter calculation method, a control system applying the method and a sewing machine.
Background
With the continuous progress of the electronic information industry, the sewing machine is also developing towards intellectualization direction increasingly. The intellectualization of the sewing machine requires that the sewing machine can automatically select functions and parameters according to the use requirements, thereby liberating the manpower to the maximum extent and realizing the intellectualization of the machine.
The strengthening seam is completed by an electromagnet traction mechanical component, the electromagnet suction time and the electromagnet release time are connected with speed feedback, the different speeds directly influence the different angles of the trigger point, and the needle pitch and the cloth thickness can influence the angle and the speed to different degrees. The prior design of the reinforcing seam has the following defects:
1) different stitch lengths need to correspond to different seam reinforcement parameters, so that manual adjustment is needed, and the operation is very complicated;
2) different cloth thicknesses need to correspond to different loads, so that the effect of reinforcing seams is greatly interfered;
3) because the reinforcing seam is divided into modes such as front reinforcing, back reinforcing, front double reinforcing and back double reinforcing, different reinforcing modes are required to be selected according to different thicknesses of the cloth, and the operation is very complicated.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a reinforcement seam parameter calculation method, and a control system and a sewing machine using the same, which are used to solve the above problems in the prior art.
To achieve the above and other related objects, the present invention provides a reinforcement joint parameter calculation method, including: acquiring a cloth thickness value and a needle pitch set value; calculating according to the cloth thickness value to obtain a cloth thickness coefficient; the cloth thickness coefficient is calculated by the ratio of the difference between the set motor rotating speed value corresponding to the cloth thickness value and the motor rotating speed fluctuation value to the set motor rotating speed value; acquiring electromagnet suction time and electromagnet release time corresponding to the needle pitch set value; calculating to obtain a pull-in compensation angle value and a release compensation angle value; the attraction compensation angle value is obtained by calculating the product of the speed feedback value of the motor, the cloth thickness coefficient and the attraction time of the electromagnet; the release compensation angle value is obtained by calculating the product of the motor speed feedback value, the cloth thickness coefficient and the electromagnet release time; calculating to obtain an electromagnet attraction initial angle and an electromagnet release initial angle; the electromagnet suction initial angle is obtained by calculating the difference between a lower needle position reference angle and the suction compensation angle value; the initial release angle of the electromagnet is calculated by the difference between the lower needle position reference angle and the release compensation angle value.
In an embodiment of the present invention, the method further includes: pre-obtaining a motor set rotating speed value and a motor rotating speed fluctuation value of the sewing machine aiming at each cloth thickness value; and calculating the cloth thickness coefficient according to a motor set rotating speed value and a motor rotating speed fluctuation value corresponding to the pre-stored cloth thickness value matched with the cloth thickness value.
In an embodiment of the present invention, the method further includes: acquiring electromagnet suction time and electromagnet release time corresponding to each stitch length value of the sewing machine in advance; and correspondingly calculating the attraction compensation angle value and the release compensation angle value according to electromagnet attraction time and electromagnet release time corresponding to a prestored needle pitch value matched with the needle pitch set value.
In an embodiment of the present invention, the calculation parameters of the pull-in compensation angle value and the release compensation angle value further include: a precision coefficient; wherein, the suction compensation angle value is obtained by the product of a motor speed feedback value, the cloth thickness coefficient, the electromagnet suction time and a precision coefficient; the release compensation angle value is obtained by calculating the product of a motor speed feedback value, the cloth thickness coefficient, the electromagnet release time and a precision coefficient.
In an embodiment of the present invention, the thickness value of the cloth is detected by a cloth thickness sensor installed on a platform where the presser foot of the sewing machine is located.
In one embodiment of the present invention, the needle pitch setting value is detected by a needle pitch detecting device which is installed on the side edge of the sewing machine head and is coaxial with the needle pitch regulator; the needle pitch detection device includes: an angle sensor.
To achieve the above and other related objects, the present invention provides a consolidation seam parameter calculation apparatus, including: the input module is used for acquiring a cloth thickness value and a needle pitch set value; acquiring electromagnet suction time and electromagnet release time corresponding to the needle pitch set value; the calculating module is used for calculating a cloth thickness coefficient according to the cloth thickness value; the cloth thickness coefficient is calculated by the ratio of the difference between the set motor rotating speed value corresponding to the cloth thickness value and the motor rotating speed fluctuation value to the set motor rotating speed value; calculating to obtain a pull-in compensation angle value and a release compensation angle value; the attraction compensation angle value is obtained by calculating the product of the speed feedback value of the motor, the cloth thickness coefficient and the attraction time of the electromagnet; the release compensation angle value is obtained by calculating the product of the motor speed feedback value, the cloth thickness coefficient and the electromagnet release time; calculating to obtain an electromagnet attraction initial angle and an electromagnet release initial angle; the electromagnet suction initial angle is obtained by calculating the difference between a lower needle position reference angle and the suction compensation angle value; the initial release angle of the electromagnet is calculated by the difference between the lower needle position reference angle and the release compensation angle value.
To achieve the above and other related objects, the present invention provides a storage medium, in which a computer program is stored, and the computer program is loaded and executed by a processor to implement the reinforcement seam parameter calculation method as described above.
To achieve the above and other related objects, the present invention provides a sewing machine control system comprising: the cloth thickness sensor is used for being arranged on a platform where the same presser foot of the sewing machine is located so as to detect a cloth thickness value and send the cloth thickness value to the processor; a needle pitch detection device includes: an angle sensor; the needle gauge setting value detection device is used for being installed on the side edge of the sewing machine head and is coaxial with the needle gauge adjuster so as to detect the needle gauge setting value and send the needle gauge setting value to the processor; a memory for storing a computer program; a processor for loading the computer program to perform the reinforcement seam parameter calculation method as described above.
In an embodiment of the present invention, the method further includes: the display is used for acquiring a manual reinforcing seam parameter setting instruction, a semi-automatic reinforcing seam parameter setting instruction or a full-automatic reinforcing seam parameter setting instruction and sending the instructions to the processor so as to enable the processor to correspondingly realize the following steps: the function of closing the automatic adjustment of the reinforcing seam parameters, the function of opening the automatic adjustment of the reinforcing seam parameters, or the function of closing the adjustment of the reinforcing seam parameters.
To achieve the above and other related objects, the present invention provides an intelligent sewing machine, comprising: a sewing machine control system as claimed in any preceding claim.
As described above, the reinforcement seam parameter calculation method, the control system and the sewing machine using the same of the present invention obtain the thickness value of the cloth and the set value of the needle pitch; calculating according to the cloth thickness value to obtain a cloth thickness coefficient, and acquiring electromagnet suction time and electromagnet release time corresponding to the needle pitch set value; calculating to obtain a pull-in compensation angle value and a release compensation angle value; the electromagnet suction initial angle and the electromagnet release initial angle are obtained through calculation, so that the stitch length and the cloth thickness are automatically detected, and the seam reinforcement parameters are automatically calculated according to the detected stitch length and the detected cloth thickness, so that the manual operation is reduced, and the working efficiency is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a sewing machine control system according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating a method for calculating a seam reinforcement parameter according to an embodiment of the present invention.
Fig. 3 is a block diagram of a reinforcement joint parameter calculation apparatus according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The embodiment provides a sewing machine control system, which can identify the current thickness of cloth and can automatically call the optimal control parameters of the reinforcement seam under the current condition when an operator manually adjusts the needle pitch.
Referring to fig. 1, the sewing machine control system includes: the device comprises a needle pitch regulator 1, a needle pitch detection device 2, a cloth thickness detection sensor 3, a DSP main control unit 4 and a display panel 5.
The needle pitch regulator 1 can adopt a needle pitch regulating knob which is positioned at the side edge of the head of the sewing machine and is used for an operator to manually rotate to regulate the needle pitch.
The needle pitch detection device 2 is also positioned on the side edge of the sewing machine head and is coaxial with the needle pitch regulator 1, and can detect the needle pitch set by the current operator. The needle pitch detecting device 2 may employ an angle sensor capable of recognizing an angle signal, such as: a needle pitch detection sensor, a piezoelectric sensor, a displacement sensor, or the like, and a voltage divider formed by a slide rheostat may be used. When the needle pitch adjusting knob is rotated, the angle sensor converts the angle signal into a linear level signal. Preferably, the present embodiment uses an angle sensor model SV0103AEA01R 00.
And a cloth thickness detection sensor 3 mounted on a platform on which the presser foot of the sewing machine is located, for detecting a cloth thickness value, and mainly adopting a capacitive cloth thickness detection device to automatically detect the cloth thickness of the current cloth. The detection of the cloth by using the dielectric change principle of the plate capacitor is not the core of the invention, so too much description is not provided. Note that, the cloth thickness detection sensor 3 may be of a linear hall type or the like, not illustrated, in addition to a capacitive type.
And the DSP main control unit 4 is used for executing seam reinforcement parameter calculation according to the detection results of the needle pitch detection device 2 and the cloth thickness detection sensor 3 and calling optimal control parameters of seam reinforcement in the current mode. It should be noted that the sewing machine control system may adopt an MCU, an SOC, etc. in addition to the DSP main control unit, and is not limited thereto.
The display panel 5 can adopt a touch screen, so that an operator can select to set the seam reinforcement parameter to be a manual seam reinforcement parameter setting mode, a semi-automatic seam reinforcement parameter setting mode or a full-automatic seam reinforcement parameter setting mode, thereby meeting the requirements of different operators. In detail, the manual mode is to turn off the automatic adjustment function; the semi-automatic mode can adjust parameters such as electromagnet attracting time, electromagnet releasing time and the like which are considered to be suitable by self according to the judgment of the DSP main control unit; the fully automatic mode is completely without adjusting the relevant parameters.
The steps and principles of the DSP main control unit 4 performing the reinforcement seam parameter calculation will be described in detail below.
The actuation of the backstitch electromagnet comprises the time from the sending of the electromagnet action to the beginning of the electromagnet armature action and the time from the beginning of the electromagnet action to the completion of the electromagnet action. The electromagnet release process comprises the time from the electromagnet release instruction sending to the electromagnet starting to act and the time from the electromagnet starting to act to the electromagnet complete release.
(1) Table 1 shows the measured data of the gauge needle and the suction and release time of a specific model:
TABLE 1
| Gauge length (mm) | T suction time (ms) | T Release time (ms) |
| 5 | 41.0 | 20.0 |
| 4.5 | 40.3 | 19.6 |
| 4 | 38.0 | 16.6 |
| 3.5 | 36.6 | 16.0 |
| 3 | 35.3 | 14.8 |
(2) The relationship between the cloth thickness and the suction time is as follows:
the cloth thickness is directly proportional to the motor load and inversely proportional to the motor speed feedback. Preferably, the present embodiment sets the speed of the front and rear seam welds at 1800RPM, which may fluctuate within certain limits. A cloth thickness factor K1 (set speed-speed fluctuation)/set speed can be obtained by actual tests. Table 2 shows measured data for a specific model:
TABLE 2
| Cloth thickness (silk) | Set speed (RPM) | Speed fluctuation (RPM) | Cloth thickness coefficient K1 |
| 20 | 1800 | 31 | 0.983 |
| 40 | 1800 | 42 | 0.977 |
| 80 | 1800 | 61 | 0.966 |
| 150 | 1800 | 84 | 0.953 |
| 300 | 1800 | 112 | 0.938 |
(3) Calculating the initial angle of attraction and release of the electromagnet:
because the electromagnet control and electromagnet response require time, the electromagnet needs to be attracted in advance and also needs to be released in advance when being controlled. The angle is converted into a motor, namely a pull-in compensation angle and a release compensation angle.
Order: the suction compensation angle is equal to the motor speed feedback and the cloth thickness coefficient K1 is equal to T suction and the fixed coefficient K2 is equal to T suction;
the initial attracting angle is 540 degrees to the attracting compensation angle;
order: releasing compensation angle, namely motor speed feedback, cloth thickness coefficient K1, T releasing and fixing coefficient K2;
the release initiation angle is 540-release compensation angle.
It should be noted that the motor speed feedback is derived from the photo sensor inside the motor, such as: the three signals of A \ B \ Z are provided, and each revolution is provided with 720 signals of A \ B1Z, and at the moment, the speed feedback of the motor is 360 degrees/60 is 6 degrees. The fixed coefficient K2 is also the precision coefficient, which is a constant and is used for adjusting the adjustable precision of the T pull-in and the T release. It should be noted that the fixed coefficient K2 is not a necessary parameter for calculating the pull-in compensation angle or the pull-out compensation angle, but is added to achieve the fine adjustment effect. For example, if K2 is 0.1, T-pull is amplified by 10 times, and the adjustable precision is improved by 10 times. 540 degrees in the pick-up initial angle and the release initial angle is a lower needle position reference angle, which is derived from a motor control algorithm that the upper needle position is judged by detecting the position of the initial 0 degree twice, namely 360 degrees, and then the lower needle position is reached by rotating 180 degrees, namely 540 degrees.
The optimal control parameters of the current cloth thickness and the current needle pitch can be obtained by a table look-up method (table 1-2). The calculation process of the final control parameter is explained in detail below by specific examples:
the DSP main control unit 4 receives the cloth of 80 threads to be sewn by the current sewing machine, and the stitch length is 4 mm. The DSP main control unit 4 finds out that the T suction and the T release corresponding to the 4mm needle gauge are respectively as follows by searching the table 1 prestored in the DSP main control unit: t pick-up is 38ms and T release is 16.6 ms. Meanwhile, the DSP main control unit 4 finds out that the cloth thickness coefficient K1 corresponding to the 80 filaments is 0.966 by looking up the table 2 prestored therein. Subsequently, the DSP main control unit 4 calculates optimal control parameters by the following formula:
pick-up compensation angle (motor speed feedback) cloth thickness coefficient K1 (T pick-up) fixed coefficient K2
＝1800*6°*0.966*38*10-3*0.1＝39.6°；
The suction initial angle is 540 degrees to the suction compensation angle is 500.4 degrees;
releasing compensation angle (motor speed feedback) cloth thickness coefficient K1T releasing fixed coefficient K2
＝1800*6°*0.966*16.6*10-3*0.1＝17.3°；
The initial release angle is 540-the compensation release angle is 522.7.
Referring to fig. 2, the present embodiment provides a method for calculating a seam reinforcement parameter, which may be executed by the DSP main control unit 4 shown in fig. 1, or may be executed by a data processing unit such as an MCU and an SOC. The method comprises the following steps:
s201: and obtaining the thickness value of the cloth and the set value of the needle pitch.
The cloth thickness value can be detected by a cloth thickness sensor arranged on a platform where the sewing machine and the presser foot are located, and the needle pitch set value can be detected by a needle pitch detection device which is arranged on the side edge of the sewing machine head and is coaxial with the needle pitch adjusting knob. The cloth thickness detection sensor may be implemented by using a capacitance type, a line type hall type cloth thickness detection device, and the needle pitch detection device may use an angle sensor that can recognize an angle signal, such as: a needle pitch detection sensor, a piezoelectric sensor, a displacement sensor, and the like, and a voltage divider formed by a slide rheostat and the like may be used.
S202: and calculating according to the cloth thickness value to obtain a cloth thickness coefficient.
In one embodiment, as shown in table 2, step S202 is performed by obtaining a set rotation speed value of the motor and a fluctuation value of the rotation speed of the motor for each cloth thickness value of the sewing machine in advance, and then calculating a cloth thickness coefficient K1 corresponding to each cloth thickness value. The cloth thickness coefficient K1 is calculated from a ratio of a difference between a motor set rotation speed value and a motor rotation speed fluctuation value corresponding to the cloth thickness value to the motor set rotation speed value, for example, for 80-filament cloth, the cloth thickness coefficient K1 is (1800-61)/1800 is 0.966. In order to obtain the corresponding cloth thickness coefficient directly according to the cloth thickness values, the cloth thickness coefficients K1 (see the last column in table 2) can be calculated in advance according to the motor set rotation speed values and the motor rotation speed fluctuation values corresponding to different cloth thickness values, so that the corresponding cloth thickness coefficients can be obtained directly by a table look-up method after the cloth thickness values are obtained. For example, assuming that the current sewing machine is to sew 80 threads of cloth, the thickness coefficient K1 of the cloth corresponding to 80 threads is 0.966 by looking up the pre-stored table 2.
S203: and acquiring electromagnet suction time and electromagnet release time corresponding to the needle pitch set value.
In one embodiment, as shown in table 1, step S203 requires to obtain the electromagnet attracting time and the electromagnet releasing time corresponding to each stitch length value of the sewing machine in advance before execution, so as to obtain the electromagnet attracting time and the electromagnet releasing time matched with the stitch length setting value through a table lookup method in the following step. For example, if the needle pitch of the current sewing machine is set to be 4mm, T suction and T release corresponding to the needle pitch of 4mm are known by searching the pre-stored table 1 and are respectively: t pick-up is 38ms and T release is 16.6 ms.
S204: and calculating to obtain a pull-in compensation angle value and a release compensation angle value. Specifically, the method comprises the following steps:
the suction compensation angle is equal to the motor speed feedback and the cloth thickness coefficient K1 is equal to T suction and the fixed coefficient K2 is equal to T suction;
the release compensation angle is the motor speed feedback cloth thickness coefficient K1T release a fixed coefficient K2.
It should be noted that the motor speed feedback is derived from the photo sensor inside the motor, such as: the three signals of A \ B \ Z are provided, and each revolution is provided with 720 signals of A \ B1Z, and at the moment, the speed feedback of the motor is 360 degrees/60 is 6 degrees. The fixed coefficient K2 is also the precision coefficient, which is a constant and is used for adjusting the adjustable precision of the T pull-in and the T release. It should be noted that the fixed coefficient K2 is not a necessary parameter for calculating the pull-in compensation angle or the pull-out compensation angle, but is added to achieve the fine adjustment effect. For example, if K2 is 0.1, T-pull is amplified by 10 times, and the adjustable precision is improved by 10 times.
S205: and calculating to obtain an electromagnet suction initial angle and an electromagnet release initial angle. Specifically, the method comprises the following steps:
the initial attracting angle is 540 degrees to the attracting compensation angle; the release initiation angle is 540-release compensation angle.
It is worth to be noted that 540 ° of the pick-up initial angle and the release initial angle is a lower needle position reference angle, which is derived from the motor control algorithm that the upper needle position, i.e. 360 °, is determined by detecting the position of the initial 0 ° twice, and then the lower needle position, i.e. 540 °, is reached by rotating 180 °.
Referring to fig. 3, the present embodiment provides a seam reinforcement parameter calculation apparatus 300, and the apparatus 300 may be implemented as a software and may be mounted on the DSP main control unit 4 shown in fig. 1 or a data processing unit such as an MCU and an SOC, so as to execute the seam reinforcement parameter calculation method in the foregoing embodiment during operation. The apparatus 300 essentially comprises: an input module 301 and a calculation module 302. The input module 301 is configured to perform steps S201 and S203 in the foregoing method embodiment, and the calculation module 302 is configured to perform steps S202, S204 to S205 in the foregoing method embodiment.
Those skilled in the art will appreciate that the division of the various modules of the computing device 300 is merely a logical division and may be fully or partially integrated into one or more physical entities for actual implementation. And the modules can be realized in a form that all software is called by the processing element, or in a form that all the modules are realized in a form that all the modules are called by the processing element, or in a form that part of the modules are called by the hardware. For example, the module of the computing module 302 may be a separate processing element, or may be integrated in a chip, or may be stored in a memory in the form of program code, and called by a certain processing element to execute the function of the computing module 302. Other modules are implemented similarly. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
In addition, the invention also comprises a storage medium and an intelligent sewing machine, and the technical characteristics in the embodiments can be applied to the embodiments of the storage medium and the intelligent sewing machine, so that repeated description is omitted.
The storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disk, etc., are stored with computer programs that, when loaded and executed by a processor, implement all or part of the steps of the reinforcement seam parameter calculation method described in the foregoing embodiments.
The intelligent sewing machine comprises the sewing machine control system in the embodiment.
In conclusion, the reinforcement seam parameter calculation method, the control system and the sewing machine using the same can automatically detect the needle pitch and the cloth thickness, automatically calculate the reinforcement seam parameter according to the detected needle pitch and the cloth thickness, reduce the manual operation, improve the working efficiency, effectively overcome various defects in the prior art and have high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (11)
1. A reinforcement joint parameter calculation method is characterized by comprising the following steps:
acquiring a cloth thickness value and a needle pitch set value;
calculating according to the cloth thickness value to obtain a cloth thickness coefficient; the cloth thickness coefficient is calculated by the ratio of the difference between the set motor rotating speed value corresponding to the cloth thickness value and the motor rotating speed fluctuation value to the set motor rotating speed value;
acquiring electromagnet suction time and electromagnet release time corresponding to the needle pitch set value;
calculating to obtain a pull-in compensation angle value and a release compensation angle value; the attraction compensation angle value is obtained by calculating the product of the speed feedback value of the motor, the cloth thickness coefficient and the attraction time of the electromagnet; the release compensation angle value is obtained by calculating the product of the motor speed feedback value, the cloth thickness coefficient and the electromagnet release time;
calculating to obtain an electromagnet attraction initial angle and an electromagnet release initial angle; the electromagnet suction initial angle is obtained by calculating the difference between a lower needle position reference angle and the suction compensation angle value; the initial release angle of the electromagnet is calculated by the difference between the lower needle position reference angle and the release compensation angle value.
2. The method of claim 1, further comprising:
pre-obtaining a motor set rotating speed value and a motor rotating speed fluctuation value of the sewing machine aiming at each cloth thickness value;
and calculating the cloth thickness coefficient according to a motor set rotating speed value and a motor rotating speed fluctuation value corresponding to the pre-stored cloth thickness value matched with the cloth thickness value.
3. The method of claim 1, further comprising:
acquiring electromagnet suction time and electromagnet release time corresponding to each stitch length value of the sewing machine in advance;
and correspondingly calculating the attraction compensation angle value and the release compensation angle value according to electromagnet attraction time and electromagnet release time corresponding to a prestored needle pitch value matched with the needle pitch set value.
4. The method of claim 1, wherein the parameters for calculating the pull-in compensation angle value and the release compensation angle value further comprise: a precision coefficient; wherein the content of the first and second substances,
the suction compensation angle value is obtained by calculating the product of a motor speed feedback value, the cloth thickness coefficient, the electromagnet suction time and a precision coefficient;
the release compensation angle value is obtained by calculating the product of a motor speed feedback value, the cloth thickness coefficient, the electromagnet release time and a precision coefficient.
5. The method of claim 1, wherein the cloth thickness value is detected by a cloth thickness sensor mounted on a platform on which the presser foot of the sewing machine is located.
6. The method according to claim 1, wherein the needle pitch set value is detected by a needle pitch detecting device mounted on the side of the head of the sewing machine and coaxial with the needle pitch regulator; the needle pitch detection device includes: an angle sensor.
7. A consolidation seam parameter calculation apparatus, comprising:
the input module is used for acquiring a cloth thickness value and a needle pitch set value; acquiring electromagnet suction time and electromagnet release time corresponding to the needle pitch set value;
the calculating module is used for calculating a cloth thickness coefficient according to the cloth thickness value; the cloth thickness coefficient is calculated by the ratio of the difference between the set motor rotating speed value corresponding to the cloth thickness value and the motor rotating speed fluctuation value to the set motor rotating speed value; calculating to obtain a pull-in compensation angle value and a release compensation angle value; the attraction compensation angle value is obtained by calculating the product of the speed feedback value of the motor, the cloth thickness coefficient and the attraction time of the electromagnet; the release compensation angle value is obtained by calculating the product of the motor speed feedback value, the cloth thickness coefficient and the electromagnet release time; calculating to obtain an electromagnet attraction initial angle and an electromagnet release initial angle; the electromagnet suction initial angle is obtained by calculating the difference between a lower needle position reference angle and the suction compensation angle value; the initial release angle of the electromagnet is calculated by the difference between the lower needle position reference angle and the release compensation angle value.
8. A storage medium in which a computer program is stored, which, when loaded and executed by a processor, carries out a consolidation seam parameter calculation method according to any one of claims 1 to 6.
9. A sewing machine control system, comprising:
the cloth thickness sensor is used for being arranged on a platform where the same presser foot of the sewing machine is located so as to detect a cloth thickness value and send the cloth thickness value to the processor;
a needle pitch detection device includes: an angle sensor; the needle gauge setting value detection device is used for being installed on the side edge of the sewing machine head and is coaxial with the needle gauge adjuster so as to detect the needle gauge setting value and send the needle gauge setting value to the processor;
a memory for storing a computer program;
a processor for loading the computer program to perform the method of calculating a consolidation seam parameter as claimed in any one of claims 1 to 6.
10. The control system of claim 9, further comprising: the display is used for acquiring a manual reinforcing seam parameter setting instruction, a semi-automatic reinforcing seam parameter setting instruction or a full-automatic reinforcing seam parameter setting instruction and sending the instructions to the processor so as to enable the processor to correspondingly realize the following steps: the function of closing the automatic adjustment of the reinforcing seam parameters, the function of opening the automatic adjustment of the reinforcing seam parameters, or the function of closing the adjustment of the reinforcing seam parameters.
11. An intelligent sewing machine, comprising: a sewing machine control system as claimed in claim 9 or 10.
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| CN110306303B (en) * | 2019-07-15 | 2021-09-07 | 杰克缝纫机股份有限公司 | Method and device for adjusting rotating speed of sewing machine and computer equipment |
| CN110747587B (en) * | 2019-11-28 | 2021-06-22 | 杰克缝纫机股份有限公司 | Stitch length detecting method, stitch length detecting device, sewing machine, and readable storage medium |
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| CN108660625A (en) | 2018-10-16 |
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