CN201891016U - Signal conversion circuit of industrial sewing machine vertical pedal plate - Google Patents
Signal conversion circuit of industrial sewing machine vertical pedal plate Download PDFInfo
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- CN201891016U CN201891016U CN2010206039055U CN201020603905U CN201891016U CN 201891016 U CN201891016 U CN 201891016U CN 2010206039055 U CN2010206039055 U CN 2010206039055U CN 201020603905 U CN201020603905 U CN 201020603905U CN 201891016 U CN201891016 U CN 201891016U
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Abstract
The utility model discloses a signal conversion circuit of an industrial sewing machine vertical pedal plate. A vertical pedal plate operating analogue signal is connected with an input end of an analogue signal modulation and conversion module which then outputs an operating analogue signal to a servo controller after processing, vertical pedal plate foot lifting and pressing signals are connected with an input end of a foot lifting and pressing switch signal conversion module which then outputs foot lifting and pressing signals to the servo controller after processing, a vertical pedal plate trimming signal is connected with an input end of a trimming switch signal conversion module which then outputs a trimming signal to the servo controller after processing, a power module respectively provides power for the modules, and a diode D1, a diode D2 and a diode D3 respectively control output states of the modules. The signal conversion circuit can convert sewing machine controlling signals of a vertical pedal plate into digital and analogue mixing control signals required by the digital servo controller, brings convenience for controlling the sewing machine when processing wide fabrics, avoids modifying or replacing the servo controller, and saves cost.
Description
Technical field
The utility model relates to the signal conversion circuit of the vertical pedal of a kind of industrial sewing machine.
Background technology
The industrial sewing machine that has digital servo controller, usually sitting posture operation, be that the operative employee is sitting in sewing machine table and head the place ahead, operation, trimming and presser foot lifter action by sitting posture pedal control Sewing machines, the pedal of sitting posture operation has only a pedal gear, by step on before this pedal gear and after step on action, by the supporting sitting posture pedal sensor of digital servo controller, step on before can the complete operation worker high, low speed operation sewing, after step on the automatic presser foot lifter of first gear and after step on the action request of the second gear automatic shearing; But on some station of textile garment manufacture field; because the lining breadth of processing is loose; as summer sleeping mat; during the making of tent or parachute etc.; the operator needs standing at work; therefore need to use stand-type pedal to operate Sewing machines; this vertical pedal has three pedal gears; link to each other with three switches with a displacement transducer respectively; corresponding respectively sewing operation; three orders of trimming and presser foot lifter; the former servo controller that is used for the sitting posture operation just needs the digital-to-analogue mixing control signal that a kind of circuit can convert these command signals of vertical pedal to the digital servo controller needs, is convenient to the direct application of former digital servo controller on these sewing devices.Otherwise just need servo controller is implemented the transformation of the way or replacing, increased equipment cost.
Summary of the invention
Technical problem to be solved in the utility model provides the signal conversion circuit of the vertical pedal of a kind of industrial sewing machine; the digital-to-analogue that this translation circuit can convert the signal of vertical pedal control Sewing machines to digital servo controller to be needed is mixed control signal; made things convenient for the control of Sewing machines when processing wide lining; avoid the transformation of the way or the replacing of servo controller, saved cost.
For solving the problems of the technologies described above, the signal conversion circuit of the vertical pedal of the utility model industrial sewing machine comprises analog signal modulation conversion module, presser foot lifter switching signal conversion module, trimming switching signal conversion module, power module, diode D1, diode D2 and diode D3, vertical pedal operation analog signal connects described analog signal modulation conversion module input and output after treatment moves analog signal to servo controller, vertical pedal presser foot lifter signal connects described presser foot lifter switching signal conversion module input and exports the presser foot lifter signal after treatment to servo controller, vertical pedal trimming signal connects described trimming switching signal conversion module input and exports the trimming signal after treatment to servo controller, power module provides described analog signal modulation conversion module respectively, presser foot lifter switching signal conversion module and trimming switching signal conversion module power supply, the anode of described diode D1 and diode D2 is connected the status signal output of described analog signal modulation conversion module, the negative electrode of described diode D1 and diode D2 is connected the status signal input of described presser foot lifter switching signal conversion module and trimming switching signal conversion module respectively, the negative electrode of described diode D3 connects the status signal output of described presser foot lifter switching signal conversion module, and the anode of described diode D3 connects the status signal input of described trimming switching signal conversion module.
Above-mentioned analog signal modulation conversion module comprises first operational amplifier, second operational amplifier, triode Q, voltage-stabiliser tube DZ, capacitor C 11, capacitor C 12, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, resistance R 19, resistance R 10 and resistance R 111, the power supply positive and negative terminal of described first operational amplifier and second operational amplifier is connected the positive pole and the minus earth end of described power module respectively, vertical pedal operation analog signal connects the described first operational amplifier backward end, described resistance R 11 1 end ground connection, the other end connects the colelctor electrode of described triode Q, described resistance R 12 1 ends connect the colelctor electrode of described triode Q, the other end connects the described first operational amplifier forward end, described resistance R 13 two ends connect described first operational amplifier forward end and the power positive end respectively, described resistance R 14 1 ends connect the base stage of described triode Q, the other end connects the anode of described voltage-stabiliser tube DZ, the negative electrode of described voltage-stabiliser tube DZ connects the output of described first operational amplifier, described resistance R 16 1 ends connect the described first operational amplifier backward end, other end ground connection, described resistance R 15 1 ends connect described first operational amplifier output terminal, other end ground connection, the grounded emitter of described triode Q, described resistance R 17 is connected the forward end of described resistance R 18 1 ends and described second operational amplifier with capacitor C 11 backs in parallel one end, other end ground connection, the other end of described resistance R 18 connects the power positive end of described second operational amplifier, described resistance R 19 two ends connect vertical pedal operation analog signal and the described second operational amplifier backward end respectively, described resistance R 10 two ends connect described second operational amplifier backward end and the output respectively, described resistance R 111 1 ends connect described second operational amplifier output terminal, the other end is the output of described analog signal modulation conversion module, described capacitor C 12 two ends connect described resistance R 111 other ends and ground connection respectively, and the anode of described diode D1 and D2 is connected described first operational amplifier output terminal.
Above-mentioned presser foot lifter switching signal conversion module comprises first phase inverter, second phase inverter, diode D21, capacitor C 21, resistance R 21, resistance R 22 and resistance R 23, the power supply positive and negative terminal of described first phase inverter and second phase inverter is connected the positive pole and the minus earth end of described power module respectively, vertical pedal presser foot lifter signal connects the described first phase inverter input, described first inverter output connects the anode of described diode D21, the negative electrode of described diode D21 connects the described second phase inverter input, described resistance R 23 1 ends connect described second inverter output, the other end is the output of described presser foot lifter switching signal conversion module, described resistance R 21 1 ends connect the described first phase inverter U21 input, other end ground connection, described capacitor C 21 two ends connect the other end and the ground connection of described resistance R 23, described resistance R 22 1 ends connect the described second phase inverter input, other end ground connection, the negative electrode of described diode D1 connects the described second phase inverter input, and the negative electrode of described diode D3 connects the described first phase inverter input.
Above-mentioned trimming switching signal conversion module comprises the 3rd phase inverter, the 4th phase inverter, the 5th phase inverter, diode D31, capacitor C 31, resistance R 31, resistance R 32 and resistance R 33, described the 3rd phase inverter, the power supply positive and negative terminal of the 4th phase inverter and the 5th phase inverter is connected the positive pole and the minus earth end of described power module respectively, described the 3rd phase inverter is connected with the 4th phase inverter, vertical pedal trimming signal connects the input of described the 3rd phase inverter, described diode D31 anode connects described the 4th inverter output, described diode D31 negative electrode connects described the 5th phase inverter input, described resistance R 33 1 ends connect described the 5th inverter output, the other end is described trimming switching signal conversion module output, described resistance R 31 1 ends connect described the 3rd phase inverter input, other end ground connection, described resistance R 32 1 ends connect described the 5th phase inverter input, other end ground connection, described capacitor C 31 1 ends connect the other end of described resistance R 33, other end ground connection, the negative electrode of described diode D2 connects described the 5th phase inverter input, and the anode of described diode D3 connects described the 4th inverter output.
Because the signal conversion circuit of the vertical pedal of the utility model industrial sewing machine has adopted technique scheme, be that vertical pedal operation analog signal connection mode analog signal modulation conversion module input and the analog signal of output operation after treatment are to servo controller, vertical pedal presser foot lifter signal connects presser foot lifter switching signal conversion module input and exports the presser foot lifter signal after treatment to servo controller, vertical pedal trimming signal connects trimming switching signal conversion module input and exports the trimming signal after treatment to servo controller, power module provides each modular power source respectively, diode D1, diode D2 and diode D3 control the output state of each module respectively; The digital-to-analogue that this translation circuit can convert the signal of vertical pedal control Sewing machines to digital servo controller to be needed is mixed control signal, has made things convenient for the control of Sewing machines when processing wide lining, has avoided the transformation of the way or the replacing of servo controller, has saved cost.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the theory diagram of the vertical pedal signal conversion circuit of the utility model industrial sewing machine,
Fig. 2 is the principle schematic of analog signal modulation conversion module in this translation circuit,
Fig. 3 is the principle schematic of presser foot lifter switching signal conversion module in this translation circuit,
Fig. 4 is the principle schematic of trimming switching signal conversion module in this translation circuit.
The specific embodiment
The industrial sewing machine digital servo controller requires as following table 1 for the input of digital-to-analogue mixed signal, signal comprises an analog signals PEDAL and two data signal DIN3 and DIN4, analog signal PEDAL steps on the variation of angle before along with pedal and changes, before to step on angle big more, the numeral of analog quantity is high more, the speed control of corresponding digital servo controller is high more, and when flooring, Sewing machines is the maximum speed operation to set just; The one of four states of Sewing machines work has been represented in the high-low level combination of data signal DIN3 and DIN4 respectively: standby, operation, trimming and presser foot lifter.
The stand-type operation pedal that uses in the industrial sewing machine digitial controller has three pedal gears, the corresponding respectively order that starts operation, trimming, presser foot lifter of pedal, when the operator steps on the " RUN " pedal, a displacement transducer is installed below pedal, the output of displacement transducer change the respective operations workman before step on angle, preceding to step on angle big more, wishes that the Sewing machines speed of service is high more, pedal is floored, and Sewing machines will be with the maximum speed operation of setting; When the operator stepped on " trimming " and " presser foot lifter " pedal respectively, the touch-switch of corresponding pedal below just had the switch actuating signals output of trimming or presser foot lifter.
For can be with the needed digital-to-analogue mixed signal of table 1 in the conversion of stand-type pedal signal; the utility model adopts Digital Analog Hybrid Circuits to carry out the signal conversion; three pedal signals with upright operation pedal: operation; presser foot lifter and trimming signal are imported analog signal modulation conversion module respectively; presser foot lifter switching signal conversion module and trimming switching signal conversion module; the output correspondence of three modules analog signals PEDAL and two the data signal DIN3 and the DIN4 of digital servo controller; be the operation of control Sewing machines; three signals of presser foot lifter and trimming become digital-to-analogue mixed signal as shown in table 1 to send into the action that digital servo controller is finished the Sewing machines correspondence command conversion of stand-type pedal.
As shown in Figure 1, the signal conversion circuit of the vertical pedal of the utility model industrial sewing machine comprises analog signal modulation conversion module 1, presser foot lifter switching signal conversion module 2, trimming switching signal conversion module 3, power module 4, diode D1, diode D2 and diode D3, vertical pedal operation analog signal connects described analog signal modulation conversion module 1 input and output after treatment moves analog signal PEDAL to servo controller 5, vertical pedal presser foot lifter signal connects described presser foot lifter switching signal conversion module 2 inputs and exports presser foot lifter signal DIN3 after treatment to servo controller 5, vertical pedal trimming signal connects described trimming switching signal conversion module 3 inputs and exports trimming signal DIN4 after treatment to servo controller 5, power module 4 provides described analog signal modulation conversion module 1 respectively, presser foot lifter switching signal conversion module 2 and trimming switching signal conversion module 3 power supplys, the anode of described diode D1 and diode D2 is connected the status signal output of described analog signal modulation conversion module 1, the negative electrode of described diode D1 and diode D2 is connected the status signal input of described presser foot lifter switching signal conversion module 2 and trimming switching signal conversion module 3 respectively, the negative electrode of described diode D3 connects the status signal output of described presser foot lifter switching signal conversion module 2, and the anode of described diode D3 connects the status signal input of described trimming switching signal conversion module 3.
As shown in Figure 2, above-mentioned analog signal modulation conversion module 1 comprises the first operational amplifier U11, the second operational amplifier U12, triode Q, voltage-stabiliser tube DZ, capacitor C 11, capacitor C 12, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, resistance R 19, resistance R 10 and resistance R 111, the power supply positive and negative terminal of the described first operational amplifier U11 and the second operational amplifier U12 is connected the positive pole and the minus earth end of described power module respectively, vertical pedal operation analog signal connects the described first operational amplifier U11 backward end, described resistance R 11 1 end ground connection, the other end connects the colelctor electrode of described triode Q, described resistance R 12 1 ends connect the colelctor electrode of described triode Q, the other end connects the described first operational amplifier U11 forward end, described resistance R 13 two ends connect described first operational amplifier U11 forward end and the power positive end respectively, described resistance R 14 1 ends connect the base stage of described triode Q, the other end connects the anode of described voltage-stabiliser tube DZ, the negative electrode of described voltage-stabiliser tube DZ connects the output of the described first operational amplifier U11, described resistance R 16 1 ends connect the described first operational amplifier U11 backward end, other end ground connection, described resistance R 15 1 ends connect the described first operational amplifier U11 output, other end ground connection, the grounded emitter of described triode Q, described resistance R 17 is connected the forward end of described resistance R 18 1 ends and the described second operational amplifier U12 with capacitor C 11 backs in parallel one end, other end ground connection, the other end of described resistance R 18 connects the power positive end of the described second operational amplifier U12, described resistance R 19 two ends connect vertical pedal operation analog signal and the described second operational amplifier U12 backward end respectively, described resistance R 10 two ends connect described second operational amplifier U12 backward end and the output respectively, described resistance R 111 1 ends connect the described second operational amplifier U12 output, the other end is the output of described analog signal modulation conversion module 1, described capacitor C 12 two ends connect described resistance R 111 other ends and ground connection respectively, and the anode of described diode D1 and D2 is connected the described first operational amplifier U11 output.Above-mentioned first operational amplifier U11 and peripheral components and parts constitute voltage comparator circuit, above-mentioned second operational amplifier U12 and peripheral components and parts constitute the voltage ratio modulation circuit, and the output of the first operational amplifier U11 is received the anode tap of D1 and D2 for the state locking signal.
As shown in Figure 3, above-mentioned presser foot lifter switching signal conversion module 2 comprises the first phase inverter U21, the second phase inverter U22, diode D21, capacitor C 21, resistance R 21, resistance R 22 and resistance R 23, the power supply positive and negative terminal of the described first phase inverter U21 and the second phase inverter U22 is connected the positive pole and the minus earth end of described power module respectively, vertical pedal presser foot lifter signal connects the described first phase inverter U21 input, the described first phase inverter U21 output connects the anode of described diode D21, the negative electrode of described diode D21 connects the described second phase inverter U22 input, described resistance R 23 1 ends connect the described second phase inverter U22 output, the other end is the output of described presser foot lifter switching signal conversion module 2, described resistance R 21 1 ends connect the described first phase inverter U21 input, other end ground connection, described capacitor C 21 two ends connect the other end and the ground connection of described resistance R 23, described resistance R 22 1 ends connect the described second phase inverter U22 input, other end ground connection, the negative electrode of described diode D1 connects the described second phase inverter U22 input, and the negative electrode of described diode D3 connects the described first phase inverter U21 input.
As shown in Figure 4, above-mentioned trimming switching signal conversion module 3 comprises the 3rd phase inverter U31, the 4th phase inverter U32, the 5th phase inverter U33, diode D31, capacitor C 31, resistance R 31, resistance R 32 and resistance R 33, described the 3rd phase inverter U31, the power supply positive and negative terminal of the 4th phase inverter U32 and the 5th phase inverter U33 is connected the positive pole and the minus earth end of described power module respectively, described the 3rd phase inverter U31 connects with the 4th phase inverter U32, vertical pedal trimming signal connects the input of described the 3rd phase inverter U31, described diode D31 anode connects described the 4th phase inverter U32 output, described diode D31 negative electrode connects described the 5th phase inverter U33 input, described resistance R 33 1 ends connect described the 5th phase inverter U33 output, the other end is described trimming switching signal conversion module 3 outputs, described resistance R 31 1 ends connect described the 3rd phase inverter U31 input, other end ground connection, described resistance R 32 1 ends connect described the 5th phase inverter U33 input, other end ground connection, described capacitor C 31 two ends connect the other end and the ground connection of described resistance R 33, the negative electrode of described diode D2 connects described the 5th phase inverter U33 input, and the anode of described diode D3 connects described the 4th phase inverter U32 output.
After the " RUN " pedal is depressed, the output voltage signal of displacement transducer begins to change to low-voltage from 5V, on the one hand the output of voltage comparator circuit will conducting D1 and D2 diode in the analog signal modulation conversion module, the 5th phase inverter U33's is input as high level in second phase inverter U22 in the locking presser foot lifter switching signal conversion module and the trimming switch change-over module, through the reciprocal transformation of the second phase inverter U22 and the 5th phase inverter U33, the output level of presser foot lifter switching signal conversion module and trimming switch change-over module just is in " 00 " state respectively again; The voltage ratio modulation circuit is modulated into analog signal the analog voltage signal that changes from 2.5V to 3.3V in the analog signal modulation conversion module on the other hand, the filter circuit output of forming by R111 and C12 again, servo controller will be in high low speed running status according to the height control Sewing machines of this voltage value, shields the action command of trimming and presser foot lifter simultaneously.
In presser foot lifter switching signal conversion module, if analog signal modulation conversion module and trimming switching signal conversion module do not have the high level signal of locking to come by diode D1 and D3, the high level signal of " presser foot lifter " command action is through the first phase inverter U21, the second phase inverter U22, the signal conversion circuit that diode D21 and resistance R 23 are formed, output still is high level, make presser foot lifter switching signal conversion module be output as " 1 " through the filter circuit of forming by resistance R 23 and capacitor C 21 again, this moment because the operation and the trimming pedal do not depress, the output of trimming switching signal conversion module also is " 1 ", and digital servo controller control Sewing machines is finished the presser foot lifter action.
In trimming switching signal conversion module, the high level signal of trimming command action is sent into the anode tap of diode D3 and diode D31 after through the 3rd phase inverter U31 and the 4th phase inverter U32 reciprocal transformation buffering, the D31 conducting is sent high level signal into the 5th phase inverter U33, its output switching activity is a low level, and the filter circuit of process resistance R 33 and capacitor C 31 makes trimming switching signal conversion module be output as " 0 "; When the 4th phase inverter U32 is output as high level simultaneously, no matter whether the presser foot lifter signal moves, after the capital makes diode D3 conducting, high level signal makes the output of presser foot lifter switching signal conversion module be always " 1 " through the first phase inverter U21 and the conversion of second phase inverter U22 buffering, and digital servo controller will be controlled Sewing machines and preferentially finish the automatic shearing action.
To sum up, this translation circuit can be transformed into the command signal of stand-type pedal the needed control signal of industrial sewing machine servo controller: i.e. the input requirement of one tunnel analog quantity PEDAL and two-way digital quantity DIN3 and DIN4, and can be in the process that operation is made, the action command of shielding trimming and presser foot lifter, and can guarantee that when trimming and presser foot lifter move simultaneously the sequential of preferentially carrying out the automatic shearing action cooperates requirement.
Claims (4)
1. the signal conversion circuit of the vertical pedal of industrial sewing machine, it is characterized in that: this translation circuit comprises analog signal modulation conversion module, presser foot lifter switching signal conversion module, trimming switching signal conversion module, power module, diode D1, diode D2 and diode D3, vertical pedal operation analog signal connects described analog signal modulation conversion module input and output after treatment moves analog signal to servo controller, vertical pedal presser foot lifter signal connects described presser foot lifter switching signal conversion module input and exports the presser foot lifter signal after treatment to servo controller, vertical pedal trimming signal connects described trimming switching signal conversion module input and exports the trimming signal after treatment to servo controller, power module provides described analog signal modulation conversion module respectively, presser foot lifter switching signal conversion module and trimming switching signal conversion module power supply, the anode of described diode D1 and diode D2 is connected the status signal output of described analog signal modulation conversion module, the negative electrode of described diode D1 and diode D2 is connected the status signal input of described presser foot lifter switching signal conversion module and trimming switching signal conversion module respectively, the negative electrode of described diode D3 connects the status signal output of described presser foot lifter switching signal conversion module, and the anode of described diode D3 connects the status signal input of described trimming switching signal conversion module.
2. the signal conversion circuit of the vertical pedal of industrial sewing machine according to claim 1, it is characterized in that: described analog signal modulation conversion module comprises first operational amplifier, second operational amplifier, triode Q, voltage-stabiliser tube DZ, capacitor C 11, capacitor C 12, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, resistance R 19, resistance R 10 and resistance R 111, the power supply positive and negative terminal of described first operational amplifier and second operational amplifier is connected the positive pole and the minus earth end of described power module respectively, vertical pedal operation analog signal connects the described first operational amplifier backward end, described resistance R 11 1 end ground connection, the other end connects the colelctor electrode of described triode Q, described resistance R 12 1 ends connect the colelctor electrode of described triode Q, the other end connects the described first operational amplifier forward end, described resistance R 13 two ends connect described first operational amplifier forward end and the power positive end respectively, described resistance R 14 1 ends connect the base stage of described triode Q, the other end connects the anode of described voltage-stabiliser tube DZ, the negative electrode of described voltage-stabiliser tube DZ connects the output of described first operational amplifier, described resistance R 16 1 ends connect the described first operational amplifier backward end, other end ground connection, described resistance R 15 1 ends connect described first operational amplifier output terminal, other end ground connection, the grounded emitter of described triode Q, described resistance R 17 is connected the forward end of described resistance R 18 1 ends and described second operational amplifier with capacitor C 11 backs in parallel one end, other end ground connection, the other end of described resistance R 18 connects the power positive end of described second operational amplifier, described resistance R 19 two ends connect vertical pedal operation analog signal and the described second operational amplifier backward end respectively, described resistance R 10 two ends connect described second operational amplifier backward end and the output respectively, described resistance R 111 1 ends connect described second operational amplifier output terminal, the other end is the output of described analog signal modulation conversion module, described capacitor C 12 two ends connect described resistance R 111 other ends and ground connection respectively, and the anode of described diode D1 and D2 is connected described first operational amplifier output terminal.
3. the signal conversion circuit of the vertical pedal of industrial sewing machine according to claim 1, it is characterized in that: described presser foot lifter switching signal conversion module comprises first phase inverter, second phase inverter, diode D21, capacitor C 21, resistance R 21, resistance R 22 and resistance R 23, the power supply positive and negative terminal of described first phase inverter and second phase inverter is connected the positive pole and the minus earth end of described power module respectively, vertical pedal presser foot lifter signal connects the described first phase inverter input, described first inverter output connects the anode of described diode D21, the negative electrode of described diode D21 connects the described second phase inverter input, described resistance R 23 1 ends connect described second inverter output, the other end is the output of described presser foot lifter switching signal conversion module, described resistance R 21 1 ends connect the described first phase inverter U21 input, other end ground connection, described capacitor C 21 two ends connect the other end and the ground connection of described resistance R 23, described resistance R 22 1 ends connect the described second phase inverter input, other end ground connection, the negative electrode of described diode D1 connects the described second phase inverter input, and the negative electrode of described diode D3 connects the described first phase inverter input.
4. the signal conversion circuit of the vertical pedal of industrial sewing machine according to claim 1, it is characterized in that: described trimming switching signal conversion module comprises the 3rd phase inverter, the 4th phase inverter, the 5th phase inverter, diode D31, capacitor C 31, resistance R 31, resistance R 32 and resistance R 33, described the 3rd phase inverter, the power supply positive and negative terminal of the 4th phase inverter and the 5th phase inverter is connected the positive pole and the minus earth end of described power module respectively, described the 3rd phase inverter is connected with the 4th phase inverter, vertical pedal trimming signal connects the input of described the 3rd phase inverter, described diode D31 anode connects described the 4th inverter output, described diode D31 negative electrode connects described the 5th phase inverter input, described resistance R 33 1 ends connect described the 5th inverter output, the other end is described trimming switching signal conversion module output, described resistance R 31 1 ends connect described the 3rd phase inverter input, other end ground connection, described resistance R 32 1 ends connect described the 5th phase inverter input, other end ground connection, described capacitor C 31 1 ends connect the other end of described resistance R 33, other end ground connection, the negative electrode of described diode D2 connects described the 5th phase inverter input, and the anode of described diode D3 connects described the 4th inverter output.
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| CN2010206039055U CN201891016U (en) | 2010-11-12 | 2010-11-12 | Signal conversion circuit of industrial sewing machine vertical pedal plate |
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| CN2010206039055U CN201891016U (en) | 2010-11-12 | 2010-11-12 | Signal conversion circuit of industrial sewing machine vertical pedal plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105951312A (en) * | 2016-07-08 | 2016-09-21 | 杰克缝纫机股份有限公司 | Method for controlling thread cutting and press foot lifting movement of sewing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105951312A (en) * | 2016-07-08 | 2016-09-21 | 杰克缝纫机股份有限公司 | Method for controlling thread cutting and press foot lifting movement of sewing machine |
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Granted publication date: 20110706 Termination date: 20161112 |