TW477846B - Controller for sewing machine motor - Google Patents

Abstract

It is an object of the present invention to prevent the failure of a sewing machine motor through the control of the sewing machine motor corresponding to the driving situation of the sewing machine motor. In a controller for a sewing machine motor, the number of locks of a sewing machine motor 2 which are detected by a rotational position signal or a rotational speed signal output from motor rotational speed detecting means 16 is counted and the subsequent control of the sewing machine motor is changed when the counted number of locks reaches a predetermined number.

Description

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs < Technical Field of Invention > The present invention relates to a control device for an industrial sewing machine. < Knowledged technology > In recent years, industrial sewing machines are equipped with actuators and automatic sewing operations such as automatic thread trimming and return stitching. In FIG. 3, industrial sewing machines 100 According to the sewing machine body i, the sewing machine motor 2, the control box 3, and the switch operation, the power switch 4, the pedal 5, and the operator are used to connect and cut off the commercial power to the control box 3. The ground is composed of the operation control board 6, the needle 7, the needle bar 8, and the belt 10. In addition, in the operation control panel, various setting information set by the operator is sent to the control box 3. The operator operates the pedal 5 to send the start or stop command of the sewing machine to the control box 3. The control circuit inside the control box 3 drives and controls the sewing machine motor 2. The power of the sewing machine motor 2 is transmitted to the belt 10 and the main shaft 9 to Needle bar 8. In order to control the rotation position and the rotation speed of the sewing machine motor 2, generally, an induction motor is used in the case of inverter control method, and an AC servo motor is used in case of AC servo control method. The control box 3 will be described with reference to FIG. 4. By the operation of the power switch 4, the AC power supplied from the commercial power source to the control circuit can be converted into DC by the rectifier section 11 and the smoothing section 12. AC servo motor is used as the sewing machine motor 2. When the ac servo motor is controlled, the pedal input detection device 2 is operated by operating the pedal 5 ^ ---------------- Γ-- -Order --------- Line (Please read the precautions on the back before filling this page)

477846 A7 B7 V. Description of the invention (2. Input the sewing machine control signal to the CPU (Central PrOcessing.) CPU13 is based on the sewing machine control signal, the motor rotation command signal LSi and the speed command signal SPC are input to the motor control device 14. Motor control device 14 series inputs the aforementioned motor rotation instruction signal Lsi and speed instruction signal spc, sends the drive control signal to the motor actuator 15, and converts it into DC power at the rectifier section 11 and the smoothing section 12, and starts the motor actuator 15 to make the sewing machine motor 2 In addition, the detection device 16 detects the rotation speed of the sewing machine motor 2 and, at the same time, detects the rotation angle of the sewing machine motor 2 by calculating the pulse of an encoder (not shown), and sends its rotation angle detection signal to the CPU 13. CPU 13 In response to the input rotation speed detection signal, the speed command signal spc of the most appropriate rotation speed of the sewing machine motor 2 is input to the motor control device 14. In addition, the CPU 13 compares the rotation signal of the motor rotation command signal LSi with the rotation of the detection device 16. The speed detection signal determines the rotation speed of the sewing machine motor 2 at a predetermined predetermined rotation speed. The following states are continued for a predetermined period of time, or the motor is locked. The motor current switching device 19 detects the current flowing to the sewing machine motor 2 by the detection unit 19a, and the comparison unit 1913 compares the input from the comparison unit 19a. The motor current value and the Ref value input by the CPU 13. When the motor current value is greater than the Ref value, the input stop signal is sent to the motor control device j 4. The motor control device 14 is the above input input through the switching device 19 Stop signal, in order to terminate the power to the sewing machine motor 2 in an instant, the paper size can apply the Chinese National Standard (CNS) A4 (210 X 297 mm) ^ --------- (Please read the note on the back first Please fill in this page again)-Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs

477846 A7 B7 V. Description of the invention (The consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs restricts the current flowing to the sewing machine motor 2 not exceeding the reference level. In addition, the CPU 13 can control the flow to the sewing machine motor by referring to the Ref value of the detection unit 19b. The upper limit of the current of 2. The reset circuit 17 of the CPU power supply is connected to the RESET terminal (not shown) of the CPU13 to monitor the voltage of the power supply to the CPU13. When the power supply voltage is outside the range of the CPU13's action compensation voltage In case, keep the RESET terminal of CPU13 at Lo level to prevent malfunctions other than the compensation voltage of CPU13. When CPU 13 determines that the motor is locked while its processing program is in progress, in order to protect the sewing machine motor 2 from stopping power to the sewing machine motor 2 The HOLD state is formed. In addition, by the operation of the power switch 4 卯, once the power supplied to the control circuit is interrupted, the hold state is released by interrupting the power supply to the CPU 13 and secondly, the operation of the power switch 4 is 〇1 ^ Then, by using the signal of the circuit action of the cpu power RESET circuit 17, cpui3 responds to the main program and processes it according to the knowledge and the main private sequence. Collectively, these connected processing operations from the power source ff to the power source OR are temporarily referred to as the power on RESET action. The power is turned off; the output device detects the state of the power switch 4, which is also the detection of the supply control circuit. The power supply is in the supply state or is in an interrupted state, and the detection signal is input to cpui3. And &, cpun is receiving the power supply ㈣ detection letter _, because the power supply is removed by the user: Occurred, the function is unchanged , Then wait in the non-volatile memory. Continue to borrow the operation of the next 0N power supply, according to the power supply of C 3 and cooperate with the processing of the main program, you can read the waiting data from the non-volatile memory 20. This paper The standard is applicable to the Chinese national standard (CNS) A4 specification (2i〇X 297 public love) state and 20 storages ----------------- „---- Order ----- -;-Line (Please read the notes on the back before filling out this page) 25 25 V. Invention

The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints 4 $, and the traction will occur due to the burning of the shaft, the resistance of the needle when it penetrates into a very thick quilt, or the phenomenon that the thread is caught in the _axis. For this phenomenon, To protect the sewing machine motor 2, the following control is performed. • Whether the motor core exceeds a predetermined value (precjetermined), or if the motor power 2 is within a predetermined range. When the sewing machine motor 2 continues below the predetermined number of rotations for a period of time ^ between days ^, it is judged that the motor is stopped and the motor power is stopped. Eight a · A temperature detection circuit or a temperature detection knife is installed inside the sewing machine motor 2. When it detects a predetermined temperature or more, it is determined that the motor is locked and the motor is stopped. Regarding the conventional control method when the motor is locked, please refer to Figure / Figure plus description. / In the fourth figure, when the timing 马达 becomes the motor lock state, continue to 疋 间 t (sec)%, continue the timing (2) at a predetermined time (sec), determine the motor lock state, stop the power to the sewing Cutting machine motor 2. In the meantime, the coil of the sewing machine motor 2 flows a huge current in order to make the sewing motor rotate, and the internal temperature of the motor is mainly generated by the copper PRT. . And I is / ;, the current from L to the sewing machine motor 2, R is the motor coil resistance, and t is the duration of the motor lock. 2. Such a motor lock phenomenon is usually the maximum load period during the rotation of one of the main shafts of the sewing machine 'because it occurs when the needle 7 penetrates into the sewing cloth or the like. Therefore, as shown in Fig. 4, the timing needle 7 is positioned at the position where the sewing product is pierced.

Therefore, the above POWER ON RESET is performed at the timing of (5) in the figure

State

1 ^ 1 ·.-Line · (Please read the notes on the back before filling this page) • -Packing 477846 V. Description of the invention 4 A7 B7

The above-mentioned motor traction may occur due to the burning of the kettle shaft, resistance when the needle penetrates a very wide sewing object, or the thread is caught in the kettle shaft. In order to protect the sewing machine motor 2, the phenomenon is controlled as follows. 1 · Whether the motor current exceeds a predetermined value (predetermined) or the motor current is within a predetermined range. When the sewing machine motor 2 continues below the predetermined number of rotations for a pre-determined interval, it is determined that the motor is stopped and the motor is stopped. 2 · A temperature detection circuit element is set inside the sewing machine motor 2. When it detects a temperature higher than a predetermined value, it is determined that the motor is stopped and the motor is energized. The conventional control method when the motor is locked will be described with reference to FIG. 5. In Figure 5, when the timing (1) becomes the motor lock state, when the time t (Sec) continues for a predetermined time (sec), the timing (2) continues. Cpui 3 determines the motor lock state and stops the power to _ Machine motor 2. In the meantime, in order to make the slit_motor 2 rotate in a huge current, the internal temperature of the motor is mainly generated in the steel damage stage, and the internal temperature of the motor moves from (3) to (4) in the figure. > 1 is the current flowing to the seam_motor 2 and R is the motor coil resistance ' t is the duration of the motor lock. "" This kind of motor locking phenomenon is usually the maximum load during the rotation of the main shaft of the sewing machine ^ period "because it occurs when the needle 7 pierces a person's sewing. Therefore, as shown in Fig. 5, the timing needle 7 is positioned at the position where the sewing product is pierced. Therefore, the above POWER ON RESET is performed at the timing of (5) in the figure.

(Please read the precautions on the back before filling this page) Φ! .Order 丨 7 V. Description of the invention (5) After the operation, the needle position signal of the needle position detection device showing that the needle position of needle 7 is not in the upper position is output. Therefore, as described above, cpui3 controls the sewing needle 7 to move upward. < Problems to be Solved by the Invention > In the control of the conventional sewing machine motor, when the cause of the motor lock has not been released after the motor is locked, the sewing machine is repeatedly started with the po p RESET action. As shown in Fig. $, The internal temperature of the sewing machine motor 2 gradually rises to the extent that it may be burned out. That is, as a normal motor characteristic, it is the average unit time flowing to the motor coil when the motor is locked. Since the average current becomes larger, the temperature of the motor coil continues to rise sharply. … After this condition lasts for a predetermined time t (sec), cpui3 judges that the motor is locked, stops the motor from being energized, and notifies the operator of the locked state. However, in the state where the cause of the motor lock has not been removed, after the 4-terminal of the power switch is set to 0FF, immediately turn it on again (when the power is called, enter the normal control program again, borrow the sewing machine pedal 5 and so on). The operation is conducted again to the motor. In this case, the motor coil temperature is increased by the next energization, and the temperature is increased under the state that the temperature has accumulated until the previous energization. Due to this temperature increase, the AC servo motor is used. In the occasions, internal short-circuit may occur due to magnetic auxiliary-demagnetization, reducing the torque and the heat resistance of the motor coil. In addition, the encoder circuit equipped in the motor 2 of the sewing machine is subject to Chinese national standards if it exceeds the paper size. (CNS) A4 specification (210X297). 477846 The operating range of Goetsu Semiconductor may cause damage to the eyepiece motor 2. In the sewing factory, in order not to reduce the work efficiency, even when the operator locks the motor, an error occurs. After operating the power supply, Li Li performed the ON action again (P0WER 〇N screams and may repeat several times within a short time It is very likely that the temperature rise in the sewing machine motor as described above is performed. Especially, in the AC servo motor towel, the material used in the magnetic shaft of the motor is improved and guided. The result of the leaf design technology and the simulation technology of the magnetic circuit 'makes the motor gradually smaller and lighter. Compared with the conventional large motor, the heat capacity of the motor flange is smaller, which is not conducive to the heat dissipation of the guide vane roll and the coil temperature. There is a tendency for the ascent speed to become faster. For such a problem, there is an idea to shorten the judgment of the sewing machine ’s lock-up status. However, if the sewing machine lock judgment occurs frequently when sewing thick objects, it may cause normal sewing operations. In addition, when the temperature of the motor rises at a relatively gentle angle, a temperature detection circuit is installed inside the motor. By overriding the molecular and magnetic shaft demagnetization and coil lock types in the encoder room, internal short circuits can be prevented. However, when the motor is locked, the temperature of the motor coil rises rapidly, and the delay in conduction is too late to detect the response, so it cannot be prevented. As a means to improve the delay in detecting and responding, a method of temperature detecting molecules such as temperature protection is placed in the motor coil body a, but since the motor coil becomes a high-voltage part, trust due to locking occurs. The nature and the nature of horse fever apply the Chinese National Standard (CNS) A4 specification (210X297 mm) at this paper size.

-... (Please read the precautions on the back before filling out this page).

P 9 A7

I. Press release 5. Description of the invention (B7 installation problems such as large size of the body, and the problem of excessively high fish. The problem is that the total cost is incurred. The problem of the present invention is to provide a horse speed detection sewing machine lock. The occurrence of :: the control device 'can be a quick door " will not be mistakenly made in normal operation. ≪ means for solving the problem > In order to solve the above-mentioned problem, the invention of the scope of patent No. 1 includes: rotation The detection device corresponds to the detection device 16 shown in Fig. 4). It detects the rotation speed of the sewing machine 'two two ΓΓ' and outputs the rotation position. The detection device is locked (for example, as shown in Fig. The flow chart shown ^ corresponds to cpui3) shown in Figure 4. Based on the above rotation detection, 'based on the previous output rotation position signal or the aforementioned rotation speed, the number' detects whether the aforementioned motor is in a locked state; for example, the motor stop device is 'As the first! Step S15 of the flowchart shown in the figure; corresponding to CpUl3) shown in Fig. 4) is to stop the rotation of the sewing machine motor according to the detection result of the lock detection device. The sewing machine motor control device further includes a traction number calculation device (for example, corresponding to step S7 of the flowchart shown in FIG. 1), which is calculated by detecting the motor lock by the aforementioned lock-out device, The change control device (for example, corresponding to step M of the flowchart shown in the figure!) Is when the number of locks calculated by the foregoing lock number calculation device reaches a predetermined number of locks, and the subsequent sewing machine motor is changed. control. According to the invention in the scope of the patent application, when the letter of lock is counted based on the number of locks --- (Please read the precautions on the back before filling this page) ί l · --- ^ ------- --Μ0Ι —, The paper size is suitable for financial secrets (CNS) A4 specifications ⑵Q χ Norwegian 4 // 846 A7 B7 V. Description of the invention (8) f. When the employee cancels the lock of the motor, it reaches the predetermined number of locks. By means of == changing device to change the control of the sewing machine motor, so it is possible to control the sewing machine's driving status by using the delicious state of the sewing machine motor ... ', it can prevent the failure of industrial sewing machine motor. The invention of item 2 in the scope of patent application is the control device for the sewing machine motor of the first item in the scope of patent application. The control and changing device has a limit value that controls the setting to supply the aforementioned = 1 current to the maximum value than the usual value. A small maximum current limiting device (for example, corresponding to the motor current switching device 19 shown in FIG. 4). According to the invention in item 2 of the scope of patent application, by using a maximum current limiting device with a control changing device, the maximum value of the limited power supply is smaller than the normal value when the consumer-α is too large and placed in the motor lock, so It can reduce the time when the motor is locked: the temperature rise can also prevent the motor of the industrial sewing machine. Therefore, the invention in the scope of patent application No. 3 is in the scope of patent application! In the control device of the initial sewing machine of the item, the control changing device is a detection method changing device that changes the aforementioned lock detection 1 lock detection method (for example, corresponding to step S9 of the flowchart shown in the figure). According to the invention in item 3 of the scope of patent application, corresponding to the occurrence of the motor lock of the sewing machine, the lock detection method is changed to change the motor lock detection method. Therefore, it is possible to provide a method for controlling the sewing machine in accordance with the driving status of the sewing machine. The motor can also prevent the failure of the industrial sewing machine motor. ', Change for horses This paper size applies to China National Standard (CNS) A4 (210x297 mm)

--------- Order ------ (Please read the precautions on the back before filling this page)--II. --Line ·

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Explanation of Invention (9) < Implementation Mode of Invention > Hereinafter, this embodiment mode will be described in detail in FIG. 1 and FIG. 2. In this embodiment mode, in order to implement the same structure as that described in Figs. 3 and 4, the illustration and the structure description are omitted. In the following description, the same place as the conventional industrial sewing machine will be described using the same symbol. The individual names of the nonvolatile storage 20 have data fields as shown below. 1 · Initial value C; is the initial value of the variable data c 丨 described later, and is a fixed value of a positive integer. 2 count data C1, the initial value c is memorized when it is shipped from the factory for industrial sewing machines. And it is 0 or a positive integer variable value. When the sewing machine motor 2 continuously repeats the motor lock, the CPU 13 updates the variable data c i at any time. In addition, when C1 = 0, the monitoring time t1 of the motor lock continued state and the motor current limit data A will be described later. 3. Pre-rotation speed d; CPU 13 is used to determine that the motor lock is a fixed value of a positive integer. When the CPU 13 has a shaft lock, the detection device 16 detects that the motor rotation speed is less than the predetermined rotation speed D. When the monitoring time t1 continues, the motor lock is determined. 4. Monitoring time t1 of the motor lock continued state; cPul3 is used to determine that the motor lock is a fixed value of a positive integer. The CPU 13 determines that the motor is locked when the rotation speed of the sewing machine motor 2 continues at a predetermined rotation speed D and the monitoring time 11 or more continues. 5 · Monitoring time t2 of motor lock continued state; To meet t2 < tl2 The paper size is fine ---------------------- Order ------- --Line (please read the notes on the back before filling this page) 12 V. Description of the invention (10) Fixed value. When the motor lock is continuously advanced and C-man to c 1 = 0 (refer to 1 above), the CPU 13 changes the monitoring interval to tl-t2, and judges the subsequent motor lock. —6 · 4 reach value A; under the normal condition that C continuous stitching machine lock 疋 does not occur ′ is the upper limit of the current flowing to the sewing machine motor 2 at the beginning. The ratio ㈣i9b of the cPU13 in the motor current switching device 19, the output motor current limit value A, controls the upper limit of the current flowing to the sewing machine motor 2 by the output signal of the comparison unit 19b. • Motor UL P system value B; is a fixed value of B ^ A. When the motor is locked for c consecutive times (refer to the above), cpm3 outputs power to the motor, and the comparison unit 19b of the switching device 19 changes the motor current limit value to a-b and controls the current flowing to the sewing machine motor 2. Upper limit. 8 · Predetermined rotation speed E of the machinist system k is released; satisfying a fixed value of £ ^ d which is a positive value. In addition, the predetermined rotation degree 1 at which the control change is released; (degree) 'is a fixed value with a positive value. When the motor lock occurs C times in a row (C1 〇) The monitoring time t1 of CPU13 at t2 (Stl) motor lock continuity state, printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs and changing the motor current limit value to ^ A) Then, judge the motor lock. However, if the motor speed of the sewing machine detected by the detection device 16 is higher than the predetermined rotation speed E, cpui3 judges that the motor lock is released, the monitoring time t2 of the motor lock continuation state is returned to u, and the motor current limit value B Reply to A. Furthermore, the CPU 13 returns the variable data c to C. Moreover, the “cancellation of control changes detected at the predetermined rotation speed E” can be detected at the predetermined rotation angle F, and the cancellation of the control change plus 13 paper standards are applicable to China National Standard (CNS) A4 specifications ⑵ Q χ 297 public love) to explain, to explain the invention (n) for another. If the detection device detects a sewing machine with a predetermined rotation angle or more = 2 rotations, cpui3 determines that the motor lock is released, and the same process can be performed. In addition, by further detecting the predetermined rotation speed E and quoting the pre-rotation angle F, it is possible to use the combination of the control change and the release of the second action on the CPU 13 in this embodiment mode. First, operate the power switch 4 to set After turning on, by the operation of the operator's sewing machine pedal 5, the motor start signal is input to the CPU 13 by the pedal input detection device 21, and the CPU 13 reads the variable data C1 from the non-volatile memory 20 (step S1). If the CPU 13 determines whether C1 is equal to 0 (step S2), when it is not equal to 0 (step S2; NO), the CPU 13 outputs the motor current limit value A to the comparison unit 马达 of the motor current switching device 19, and performs sewing. Rotation control of the juvenile motor 2 (step S3). In addition, the CPU 13 monitors the detected rotation speed of the sewing machine motor 2 at regular intervals during the rotation of the sewing machine motor 2 at a predetermined interval, and determines whether the rotation speed of the sewing machine motor 2 is below the predetermined rotation speed D. (Step S4) If the predetermined rotation speed D is exceeded (step% NO), the CPU 13 returns from Cl to C (step S6), and returns to step! . In addition, if the predetermined rotation speed is 0 or less (step M; YU) ', the CPU 13 monitors the rotation speed of the sewing machine motor 2 between the state monitoring time u, determines its state, and knows whether the monitoring time continues above u. Here, the rotation speed of the sewing machine motor 2 becomes the predetermined rotation speed MW l · —Order --------- Thread #-(Please read the precautions on the back before filling this page) Intellectual Property Bureau of the Ministry of Economic Affairs Printed by Employee Consumer Cooperative

D

Printed by the Consumers ’Cooperative of the Ministry of Economic Affairs and Intellectual Property Bureau. 5. Description of the invention: In the case where the monitoring day has not continued above tl (step S5; N0), return to step S4, and the CPU 13 determines whether the rotation speed is again at the predetermined rotation. Below the speed, step S4 and step S5 are repeatedly performed to judge the rotation speed of the sewing machine 2 and whether the monitoring time continues below t1 above the predetermined rotation speed D. In addition, the rotation speed of the sewing machine motor 2 is below the predetermined rotation speed D. 'If the monitoring time continues to be longer than t1 (step S5; YES)' CPU13 reduction variable data C1 (step S7), determine whether C1 is equal to 0 (step S8) Moreover, when Cl is equal to 0 (step S8; YES), the cpiJ13 change monitoring time is shortened from t1 to t2, and the motor current limit value is changed to a smaller value from eight to B (step S9). Furthermore, the CPU 13 stops the sewing machine motor (step S15), and the power supply is placed in a standby state of 0FF (step 16), and the processing is ended. In addition, when C1 is not equal to 0 (step S8; N〇), it moves to step S15 '〇? 1; 13 stops the sewing machine motor (step 815), and the power supply becomes in a waiting state of 01 ^ (step s 16). ) To end processing. — When ci = 0 in step S2 (step S2; YES), go to step S10. Here, the so-called C1 = 〇 is the monitoring time t2 and the motor current limit value B during the previous sewing machine lock detection, and the CPU 13 performs the rotation of the sewing machine motor 2 at the monitoring time t2 and the current limit value B. control. Next, the CPU 13 detects the detected rotation speed by the detection device, and determines whether the rotation speed of the sewing machine motor 2 is higher than the predetermined rotation speed E (step S11), and if it is higher than the predetermined rotation speed E ( Steps This paper size is suitable for financial @ National Standards (CNS; i \ 4 specifications (2i〇X 297 public love) 15 ^ ---------- ^ --------- ^ (please first Read the notes on the back and fill in this page) 477846, 91. 1.2b 1; > '' A7 ...., _- '1 1 "_B7_ 5. Description of the invention (12), the monitoring time has not continued at ti In the above cases (step S5; No), return to step S4, the CPU 13 determines whether the re-rotation speed is below the predetermined rotation speed, and then repeats the steps S4 and S5 to determine the rotation speed of the sewing machine 2 at the predetermined rotation. Does the monitoring time below speed D continue at tl. In addition, if the rotation speed of sewing machine motor 2 is below the predetermined rotation speed D, if the monitoring time continues above 11 (step $ 5; yes), CPU13 reduces the variable data Cl (step S7), determine whether ci is equal to 0 (step S8), ir- and when C1 is equal to 0 (step S8; YES), the CPU13 change monitoring time is shortened from t1 to t2, and the motor current limit value is changed to a smaller value from eight to B (step S9). Furthermore, CPU1w ^ the sewing machine motor is stopped (step S15), and the power supply becomes Wait at 0FF (step 16), and end the process. In addition, when C1 is not equal to 0 (step s8; NO), move to step s15, the CPU13 stops the sewing machine motor (step S15), and the power source becomes at FF Waiting state (step S16), the process ends. In step S2, when Cl = 〇, (step S2; YES), move to step S. Here, the so-called c 1 == 〇, which is the first Next, when the sewing machine lock is detected, since the monitoring time is set to 0 and the motor current limit value B, the CPU 13 implements the rotation control of the sewing machine motor 2 at the monitoring time t2 and the current limit value B. Next, the CPU 13 borrows a detection device to monitor the location The detected rotation angle detection signal determines whether the rotation speed of the sewing machine motor 2 is higher than a predetermined rotation speed E (step S11). If the rotation speed is higher than a predetermined rotation speed E (steps, the paper size is applicable to China) Home Standard (CNS) A4 Specification (210X297 Gongchu) H // 846

V. Description of the invention (13)

Sll; YES), return the monitoring time t2 to the value t1, and further, return the variable data C1 to the initial value c (step S14), and then return to step S1. In addition, when the rotation speed E is not reached in step S11 (step S11; NO), the CPU 13 determines whether the rotation speed of the sewing machine motor 2 is below the predetermined rotation speed D (step S12). If it exceeds the predetermined rotation speed Σ In the case (step S12; N0), the process returns to step S1. In addition, if it is determined that the rotation speed is lower than D (step S12; YES), cpui3 ^ determines the monitoring speed of the sewing machine motor 2 between the monitoring time t2, and determines whether the state monitoring time is lower than the pre-rotation speed D. Continue to 12 or more (step riding S13) 〇 Here 'When the monitoring time continues for t2 or more (step S1 3; yes, move to step S15 to stop the rotation of the sewing machine motor 2 and wait for the power to turn off If it is sad (step sj 6), the process ends. In addition, if the monitoring time does not continue above t2 (step ⑴; _, return to; step S12, determine whether it is below 敎 rotation speed ， again, and then repeat the step. ㈣2 and step SU, if the rotation speed is below D, it is judged whether the monitoring time continues to be above t2. Machine 5 to 2: 2: Industrial sewing machine in the continuous application mode 'The sewing machine motor is at the pre-rotation speed D In the following, the monitoring time will continue at the door of tl = 'Judging the machine motor', the electric cup of the material motor will stop the transportation of the sewing machine motor 2, and the degree will increase. Lian # can prevent the temperature of the sewing machine motor 2 and When the motor is locked Reduce variable variable assets, current variable assets (please read the notes on the back before filling this page) Order --------- line, printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

This paper size + _ mWTcmAi ^ (2ί〇χ 297 mm), printed by the Consumer Cooperatives of the Ministry of Economic Affairs and Intellectual Property Bureau. 5. Description of the invention (Η Change the time and change the motor current limit value -2. In addition, if the motor of the sewing machine continues to be above the speed E, and the conditions are detected during the monitoring, then the setting of the motor lock operation will be changed. The operation status of the industrial sewing machine will be borrowed from the machine. The motor lock detection condition can prevent industrial sewing. In addition, the motor current value of the comparison unit 19b input to the motor current switching device M is controlled to limit the maximum current flowing into the sewing machine motor 2; σ 乂 f1 cattle The rise in the internal temperature of the sewing machine motor 2 during low-motor traction can improve the reliability of industrial sewing machines. A. In the above description, the state below the predetermined rotation speed D-depending on the performance In the case of variable data cb0, the change processing at the monitoring time tbt2, A-β, but in this case, the change does not need to be changed by both parties, needless to say Only one of them may be changed. Furthermore, in the above-mentioned embodiment, when the rotation speed of the sewing machine motor 2 is lower than the predetermined rotation speed D, the variable data C1 is returned to the original initial value C (the first step in the figure! S6), but set another method and set the switch to return the variable data C1 to the initial value C by the operation of the switch, or when the sewing machine has not been started for a predetermined time monitoring the time after the motor lock is detected, make it reply It is also possible to reach the original initial value C. In addition, 'By detecting the change of the release control of the predetermined rotation speed E, it is possible to detect the change of the change of the control according to the predetermined rotation angle F, and this paper size applies the Chinese national standard (CNS ) A4 size (210 X 297 mm) ^ \ η --- ~ --- ^ --------- ^ --------- line ί Please read the precautions on the back first (Fill in this page) A7 A7 5. The Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs printed a more elaborate invention (IS). After the borrowing device 16 detected the predetermined rotation angle f, CPU 13 described the inspection. At a predetermined rotation speed E, The implementation of the sewing machine motor & of the same control system. Furthermore, the detection of the predetermined rotation speed and the pre-rotational rotation angle F is performed at the same time. When any one of them is detected, even if the release control is changed. In addition, the detection of the predetermined rotation angle F is not limited to the time when the sewing motor 2 is started. The detection is “by borrowing” that the sewing machine motor 2 above the predetermined rotation angle F is suspected even when the sewing machine motor 2 is not started. The daily reading of the rotation is regarded as the cause of removing the motor lock, even if the release control is changed. < Effect of the invention > According to the oldest invention according to the scope of the patent application, since the device for controlling the number of times of the sewing machine is changed according to the number of times of the motor lock by the number of locks, it can provide a kind of motor drive according to the driving status of the sewing machine Controlling the motor of the sewing machine can also prevent the motor of the industrial sewing machine from malfunctioning. According to the invention in the scope of patent application No. 2, because the maximum current limiting device with a control transformer device is used to limit the maximum value of the electricity supplied to the sewing machine motor than usual, it can reduce the strategy of the motor when the motor is locked. The rise in internal temperature can also prevent motor failure. m-knife machine = the invention in the scope of patent application No. 3, because the method of detecting the motor lock is changed in response to the occurrence of the sewing machine = reaching the lock status The motor can also prevent the malfunction of the industrial sewing machine motor. ----------------- = ---- Order --------- Line IAW. (Please read the notes on the back before filling this page) This paper Dimensions in the family material (CNS) A4 specification ⑵ Q χ Norwegian Kung £ 6 Five invention description (l6) < Simplified description of the drawing > Figure 1 shows the control of the motor of the sewing diagram cutting machine in this embodiment Figure 2 shows the control flow of the sewing machine motor in this embodiment. Figure 3 shows the conventional appearance. The structure of the main part of the industrial sewing machine 100 is shown in Fig. 4. Fig. 4 is a circuit diagram showing a control circuit of a conventional industrial sewing machine 100. Time chart within item 3. Figure 5 shows the comparison of the fixed component codes of the conventional sewing machine control when the motor is locked. * The sewing machine body printed by the Ministry of Economic Affairs, the Intellectual Property Bureau employee consumer cooperative 9 · · · the main sewing machine motor 10 · · · belt control Box u ··· Rectifier section power switch U ··· Smoothing section operation control board 13 --- CPU pin 14 ··· Motor control device needle bar 15 ··· Motor transmission device This paper size applies to Chinese National Standard (CNS) A4 specification (210 X 297 mm) 19 477846 A7 B / V. Description of the invention (17 16 ... motor rotation speed detection device 19b ... comparison unit 17 ... CPU power reset circuit 18 ... power OFF detection device 19 ... motor Current switching device 19a ... detection section 20 ... non-volatile storage 21 ... pedal force detection device 100 ... industrial sewing machine -------------------- -Order --------- line " ^ 1 ^ — (Please read the notes on the back before filling out this page) The paper size printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs applies to Chinese national standards (CNS ) A4 size (210 X 297 mm)

Claims (1)

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