CN111240272A - Trademark machine cutting knife ironing board controller - Google Patents
Trademark machine cutting knife ironing board controller Download PDFInfo
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- CN111240272A CN111240272A CN201910905278.6A CN201910905278A CN111240272A CN 111240272 A CN111240272 A CN 111240272A CN 201910905278 A CN201910905278 A CN 201910905278A CN 111240272 A CN111240272 A CN 111240272A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/414—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
- G05B19/4142—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller characterised by the use of a microprocessor
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34013—Servocontroller
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Abstract
The invention discloses a cutting knife ironing board controller of a trademark machine, which comprises a main control MCU, an ironing board control circuit and a plurality of cutting knife control circuits, wherein the cutting knife control circuits are respectively connected with an analog signal output port of the main control MCU and an input interface of an ADC (analog-to-digital converter), and the ironing board control circuits are respectively connected with an SPI (serial peripheral interface) and a digital output port of the main control MCU. The invention has the advantages that: the cutting knife control circuit is provided with two control loops, so that the stability of the output of the cutting knife control circuit is improved, and the cutting knife control has the functions of detecting abnormality such as wire breakage, overcurrent and output abnormality; the optical coupler and the common mode resistor are arranged in the ironing board control circuit, so that the interference problem is solved, and the ironing board control accuracy is improved; the ironing board and the cutting knife are controlled by the same main control MCU without separate control.
Description
Technical Field
The invention relates to the field of trademark machine equipment, in particular to a cutter ironing plate controller of a trademark machine.
Background
The label maker can process the cloth on the machine before the cloth is fed: the cutting is to divide the cloth into several pieces by electric heating wires. The shaping means that the cloth after being split is heated to about 100 ℃ again, so that the edge of the cloth cover is smooth, and the phenomena that wool flowers and yarns are not easy to shift are reduced. Temperature control in cutting is generally achieved by controlling the current in the heating wire. Due to the processes of changing weft density and stopping prying, the requirements on the current control speed and the stability of the hot cutting knife are high. And the temperature on the ironing board is stabilized by controlling the voltage of the electric heating wire during shaping.
At present, a cutting knife and an ironing plate are separately controlled on a circuit and are electrically isolated from each other. Thus, when in use, the ironing plate and the cutting knife are two different control objects, which is inconvenient to operate. Meanwhile, in order to facilitate maintenance, the cutting knife control module is often made into a single module, which is easy to replace but increases much cost. Meanwhile, the existing trademark machine cutting knife ironing plate controller can only set the temperature of the cutting knife ironing plate on the controller, and does not have the functions of wire breakage and short circuit detection. In addition, the thermoelectromotive force generated by the thermocouple is in the microvolt level, and is easily subjected to leakage current of the hot plate and electromagnetic interference of other equipment in an actual circuit.
Disclosure of Invention
The invention mainly solves the problems and provides the cutting knife ironing board controller of the trademark machine, which can avoid leakage current and electromagnetic interference of other equipment to the thermocouple of the ironing board, improve the accuracy of temperature control of the ironing board and integrate the ironing board and the cutting knife together.
The technical scheme adopted by the invention for solving the technical problem is that the cutting knife ironing board controller of the trademark machine comprises a main control MCU, an ironing board control circuit and a plurality of cutting knife control circuits, wherein the cutting knife control circuits are respectively connected with an analog signal output port of the main control MCU and an ADC input interface, and the ironing board control circuit is respectively connected with an SPI port and a digital output port of the main control MCU.
The main control MCU controls the temperature of the cutting knife through an analog signal, receives feedback information of the cutting knife control circuit through the ADC input interface to realize closed-loop control of the current of the cutting knife, can also detect whether the cutting knife is broken, establishes closed-loop control with the ironing board control circuit through the SPI and the digital output port, and integrates ironing board control and cutting knife control on the same controller.
As a preferable scheme of the above scheme, the ironing board control circuit includes an ironing board M1, a thermocouple conversion circuit, and a relay U4 connected to a digital output port of the main control MCU and used for controlling operation of a heating pipe in the ironing board M1, an input end of the thermocouple conversion circuit is connected to an anode and a cathode of the heating pipe in the ironing board M1, and an output end of the thermocouple conversion circuit is connected to an SPI port of the main control MCU. The thermocouple conversion circuit realizes the function of converting thermocouple voltage into digital temperature, the master control MCU can conveniently acquire the temperature of the ironing board, the master control MCU controls the temperature of a heating pipe in the ironing board through a digital output port in real time according to the acquired temperature of the ironing board, and the relay realizes the isolation of an ironing board power supply and a control signal.
As a preferable scheme of the above scheme, the thermocouple conversion circuit includes a thermocouple conversion chip U3, a common mode inductor L1, an optical coupler U22, an optical coupler U23, an optical coupler U24 and a DC/DC converter U10, a power supply end of the thermocouple conversion chip U3 is connected to a power VCC through a DC/DC converter U10, positive and negative electrodes of a thermocouple of the thermocouple conversion chip U3 are connected to positive and negative electrodes of a heating pipe in the ironing board M1 through a common mode inductor L1, and an SPI pin of the thermocouple conversion chip U3 is connected to an SPI pin of the main control MCU through the optical coupler U22, the optical coupler U23 and the optical coupler U24, respectively. The common mode inductor L1 solves the space interference introduced by the extension line of the thermocouple, and the optical coupler realizes the signal isolation between the thermocouple conversion chip and the main control MCU.
As a preferable scheme of the above scheme, the system further comprises a communication circuit, and the communication circuit is connected with the communication interfaces of the upper computer and the main control MCU. The setting of communication interface can realize the long-range setting of cutting knife ironing plate temperature and the long-range looking over of alarm signal.
As a preferred scheme of the above scheme, the cutting knife control circuit includes a voltage output driving circuit, a load current conversion voltage circuit and a cutting knife RL, an input end of the voltage output driving circuit is connected to an analog signal output port of the main control MCU and an output end of the load current conversion voltage circuit, an output end of the voltage output driving circuit is connected to an input end of the load current conversion voltage circuit, an output end of the load current conversion voltage circuit is further connected to an ADC input interface of the main control MCU, and the load current conversion voltage circuit is further connected to the cutting knife RL. The load current conversion voltage circuit converts the load current of the cutting knife into voltage and amplifies the voltage, the amplified voltage and an analog signal output by the main control MCU are jointly connected to the input end of the voltage output driving circuit so as to stabilize the output voltage of the voltage output driving circuit, and the amplified voltage is also connected to the main control MCU and used for correcting the output circuit and judging whether the circuit is abnormal or not.
As a preferable scheme of the above scheme, the voltage output driving circuit includes a resistor R4, a resistor R8, a resistor R10, a capacitor C1, a polar capacitor C3, a polar capacitor C4, an inductor L2, a diode D2, and a voltage feedback type power chip U6, the analog signal output port of the main control MCU is connected to the first end of the resistor R4, the second end of the resistor R4 is connected to the first end of the capacitor C1, the first end of the resistor R10, the first end of the resistor R8, and the feedback input end of the voltage feedback type power chip U6, the second end of the capacitor C1 is connected to GND and the second end of the resistor R10, the second end of the resistor R2 is connected to the output end of the load current conversion voltage circuit, the voltage input end of the voltage feedback type power chip U6 is connected to the positive electrodes of the power supply DC48V and the polar capacitor C3, the polar capacitor C3 is connected to GND, the negative electrode of the voltage output end of the voltage feedback type power chip U6 is, the anode of the diode D2 is grounded GND, the second end of the inductor L2 is respectively connected with the anode of the polar capacitor C4 and the input end of the load current conversion voltage circuit, and the cathode of the polar capacitor C4 is grounded GND.
As a preferable scheme of the above scheme, the load current conversion voltage circuit includes a resistor R5, a resistor R6, a resistor R7, a resistor R9, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, and an operational amplifier U16, an output end of the voltage output driving circuit is respectively connected to a first end of the resistor R16 and a second end of the resistor R16, a second end of the resistor R16 is respectively connected to a first end of the resistor R16 and a first end of the resistor R16, a second end of the resistor R16 is respectively connected to an inverting input end of the operational amplifier U16 and a first end of the resistor R16, a second end of the resistor R16 is respectively connected to an output end of the operational amplifier U16, an output end of the operational amplifier U16 is connected to an ADC input interface of the MCU, a second end of the resistor R16 is connected to the ground, and a second end, the second end of the resistor R11 is respectively connected with the first end of the resistor R14 and the first end of the resistor R15, the second end of the resistor R14 is respectively connected with the first end of the resistor R17 and the non-inverting input end of the operational amplifier U7, and the second end of the resistor R17 and the second end of the resistor R15 are both grounded GND.
As a preferable scheme of the above scheme, the cutter control circuit includes a cutter RL, an inductor L11, a diode D1, a resistor R1, a power control chip U1, and an operational amplifier U5, an analog signal output port of the main control MCU is connected to a feedback input terminal of the power control chip U1, an output terminal of the power control chip U1 is connected to a first terminal of the inductor L11 and a cathode of the diode D1, a second terminal of the inductor L11 is connected to a first terminal of the resistor R1 and a positive-phase input terminal of the operational amplifier U5, a second terminal of the resistor R1 is connected to a negative-phase input terminal of the operational amplifier U5 and an anode of the cutter RL, an anode of the diode D1 and a cathode of the cutter are both grounded GND, and an output terminal of the operational amplifier U5 is connected to an ADC input interface of the main control MCU and a.
The invention has the advantages that: the cutting knife control circuit is provided with two control loops, so that the stability of the output of the cutting knife control circuit is improved, and the cutting knife control has the functions of detecting abnormality such as wire breakage, overcurrent and output abnormality; the optical coupler and the common mode resistor are arranged in the ironing board control circuit, so that the interference problem is solved, and the ironing board control accuracy is improved; the ironing board and the cutting knife are controlled by the same main control MCU without separate control.
Drawings
Fig. 1 is a functional block diagram of a trademark cutter ironing board controller in embodiment 1.
Fig. 2 is a schematic circuit diagram of the thermocouple conversion circuit in embodiment 1.
Fig. 3 is a schematic circuit diagram of a cutter control circuit in embodiment 1.
Fig. 4 is a schematic circuit diagram of a cutter control circuit in embodiment 2.
1-master control MCU 2-cutting knife control circuit 3-cutting knife control circuit 4-thermocouple switching circuit 5-communication circuit.
Detailed Description
The technical solution of the present invention is further described below by way of examples with reference to the accompanying drawings.
Example (b):
the utility model provides a trademark machine cutting knife ironing board controller, as shown in fig. 1, including master control MCU1, ironing board control circuit 2, a plurality of way cutting knife control circuit 3 and communication circuit 5, cutting knife control circuit links to each other with master control MCU analog signal output port and ADC input interface respectively, ironing board control circuit includes ironing board M1, thermocouple converting circuit 4 and relay U4, relay U4 links to each other with master control MCU digital output port and is arranged in controlling the operation of heating pipe in ironing board M1, thermocouple converting circuit input links to each other with the heating pipe positive negative pole in ironing board M1, thermocouple converting circuit output links to each other with master control MCU's SPI mouth, communication circuit connects host computer and master control MCU's communication interface.
As shown in fig. 2, the thermocouple conversion circuit includes a thermocouple conversion chip U3, a common mode inductor L1, an optical coupler U22, an optical coupler U23, an optical coupler U24, a DC/DC converter U10, a resistor R30, a resistor R31, and a resistor R32, a fourth pin of the thermocouple conversion chip U3 is connected to a power VCC through a DC/DC converter U10, a second pin and a second pin of a thermocouple conversion chip U3 are connected to a positive electrode and a negative electrode of a heating pipe in an ironing board M1 through a common mode inductor L1, respectively, a fifth pin of the thermocouple conversion chip U3 is connected to a first end of a resistor R30 and an output end of an optical coupler U24 light receiver, a second end of the resistor R30 is connected to the power VCC, an input end of the optical coupler U24 light receiver is grounded to GND, an anode of an optical coupler U9 light emitter is connected to an IO port of a main control MCU, a cathode of the optical coupler U24 light emitter is connected to an SCK pin in an SPI pin of the main control MCU, a sixth pin of the, resistance R31 second termination power VCC, opto-coupler U23 receives optical ware input ground connection GND, opto-coupler U23 illuminator positive pole links to each other with main control MCU's IO mouth, opto-coupler U23 illuminator negative pole links to each other with the CS pin in main control MCU's the SPI pin, thermocouple conversion chip U3 seventh pin links to each other with opto-coupler U22 illuminator negative pole respectively, opto-coupler U22 illuminator positive pole links to each other with resistance R32 first end, resistance R32 second termination power VCC, the MISO pin in opto-coupler U22 receives optical ware input and main control MCU's the SPI pin links to each other, opto-coupler U22 receives optical ware output and main control MCU's IO mouth links to each other. The common mode inductor L1 has solved the space interference that the thermocouple extension line introduced, and the signal isolation between thermocouple conversion chip and the main control MCU has been realized to the opto-coupler, and the thermocouple conversion chip U3 adopts MAX6675 chip, and the main control MCU adopts STM32F105VET6 chip in this embodiment.
As shown in fig. 3, the cutter control circuit includes a cutter RL, an inductor L11, a diode D1, a resistor R1, a power control chip U1 and an operational amplifier U5, an analog signal output port of the main control MCU is connected to a feedback input terminal of the power control chip U1, an output terminal of the power control chip U1 is connected to a first terminal of the inductor L11 and a cathode of the diode D1, a second terminal of the inductor L11 is connected to a first terminal of the resistor R1 and a positive-phase input terminal of the operational amplifier U5, a second terminal of the resistor R1 is connected to a negative-phase input terminal of the operational amplifier U5 and an anode of the cutter RL, an anode of the diode D1 and a cathode of the cutter are both grounded GND, and an output terminal of the operational amplifier U5 is connected to an ADC input interface of the main control MCU and.
In this embodiment, the power control chip U1 employs an LM2575HV-ADJ chip, the main control MCU controls the output of the power control chip U1 by outputting an analog signal, because the current on the resistor R1 and the cutting knife RL is in a linear relationship, the current on the cutting knife RL can be obtained by the current on the resistor R1, the operational amplifier U5 amplifies the current signal on the resistor R1, and inputs the amplified signal to the power control chip U1 for maintaining the stability of the output voltage of the power control chip, the operational amplifier U5 also inputs the amplified signal to the main control MCU, and the main control MCU determines whether the load current reaches a set value by using the amplified signal, and if the load current is too large different from the preset current, the main control MCU takes a correction by controlling the power control chip U1.
Example 2:
the present embodiment is different from embodiment 1 in that the cutting blade control circuit of the present embodiment is different from that of embodiment 1.
As shown in fig. 4, the cutting knife control circuit includes a voltage output driving circuit, a load current conversion voltage circuit and a cutting knife RL, the voltage output driving circuit includes a resistor R4, a resistor R8, a resistor R10, a capacitor C1, a polarity capacitor C3, a polarity capacitor C4, an inductor L2, a diode D2 and a voltage feedback type power chip U6, in the voltage output driving circuit, a first end of a resistor R4 is an input end, a second end of the inductor L2 is an output end, a main control MCU analog signal output port is connected with the first end of the resistor R4, a second end of the resistor R4 is connected with a first end of a capacitor C1, a first end of a resistor R10, a first end of a resistor R8 and a feedback input end of the voltage feedback type power chip U6, a second end of the capacitor C1 is respectively connected to ground and a second end of a resistor R10, a second end of the resistor R8 is connected with an output end of the load current conversion voltage circuit, a voltage input end of the voltage feedback type power chip U59, the negative electrode of the polar capacitor C3 is grounded to GND, the voltage output end of the voltage feedback type power chip U6 is respectively connected with the cathode of the diode D2 and the first end of the inductor L2, the anode of the diode D2 is grounded to GND, the second end of the inductor L2 is respectively connected with the positive electrode of the polar capacitor C4 and the input end of the load current conversion voltage circuit, and the negative electrode of the polar capacitor C4 is grounded to GND.
The load current conversion voltage circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R9, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17 and an operational amplifier U7, wherein the first end of the resistor R5 in the load current conversion voltage circuit is an input end, and the output end of the operational amplifier U7 is an output end of the load current conversion voltage circuit. The output end of the voltage output driving circuit is respectively connected with a first end of a resistor R5 and a second end of a resistor R6, a second end of the resistor R5 is respectively connected with a first end of a resistor R7 and a cutting knife RL, a second end of the resistor R7 is connected with a first end of a resistor R12, a second end of the resistor R12 is respectively connected with a first end of a resistor R13 and a first end of a resistor R16, a second end of the resistor R13 is respectively connected with an inverting input end of an operational amplifier U7 and a first end of a resistor R9, a second end of the resistor R9 is respectively connected with an output end of the operational amplifier U7, an output end of the operational amplifier U7 is connected with an ADC input interface of a main control MCU, a second end of the resistor R16 is grounded GND, a second end of the resistor R6 is connected with a first end of the resistor R11, a second end of the resistor R11 is respectively connected with a first end of a resistor R14 and a first end of a resistor R15, a second end.
In this embodiment, the voltage feedback power chip U6 employs an LM2576-ADJ chip, the resistor R5 converts the current into a voltage and inputs the voltage into the operational amplifier U7, the operational amplifier U7 respectively transmits the amplified voltage to the voltage feedback power chip U6 and the ADC input interface of the main control MCU, the voltage transmitted to the feedback input terminal of the voltage feedback power chip U6 is superimposed with the analog signal output by the main control MCU and then input to the feedback input terminal of the voltage feedback power chip U6, and the voltage transmitted to the ADC input interface of the main control MCU is subjected to AD conversion by the main control MCU and then used for correcting the output current and determining whether the line is abnormal.
Example 3:
the difference between this embodiment and embodiment 1 is that the cutting knife control circuit in this embodiment is connected to the PWM output port of the main control MCU and the ADC input interface, respectively, and the main control MCU controls the cutting knife control circuit through the PWM wave. The cutting knife control circuit adopts a constant current output circuit to supply power for the cutting knife.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides a trade mark machine cutting knife ironing board controller which characterized by: the cutting knife cutting machine is characterized by comprising a master control MCU (1), an ironing board control circuit (2) and a plurality of cutting knife control circuits (3), wherein the cutting knife control circuits are respectively connected with an analog signal output port and an ADC (analog-to-digital converter) input interface of the master control MCU, and the ironing board control circuit is respectively connected with an SPI (serial peripheral interface) and a digital output port of the master control MCU.
2. The trademark cutter ironing board controller according to claim 1, characterized in that: the ironing board control circuit comprises an ironing board M1, a thermocouple conversion circuit (4) and a relay U4 which is connected with a digital output port of the master control MCU and used for controlling the operation of a heating pipe in the ironing board M1, the input end of the thermocouple conversion circuit is connected with the anode and the cathode of the heating pipe in the ironing board M1, and the output end of the thermocouple conversion circuit is connected with an SPI of the master control MCU.
3. The trademark cutter ironing board controller as claimed in claim 2, wherein: thermocouple conversion circuit includes thermocouple conversion chip U3, common mode inductance L1, opto-coupler U22, opto-coupler U23, opto-coupler U24 and DC/DC converter U10, thermocouple conversion chip U3 power end passes through DC/DC converter U10 and links to each other with the power VCC, and thermocouple conversion chip U3 thermocouple positive and negative pole passes through common mode inductance L1 and scalds heating pipe positive and negative pole in board M1 and links to each other, and thermocouple conversion chip U3's SPI pin links to each other with master control MCU's SPI pin through opto-coupler U22, opto-coupler U23 and opto-coupler U24 respectively.
4. The trademark cutter ironing board controller according to claim 1, characterized in that: the intelligent control system is characterized by further comprising a communication circuit (5), wherein the communication circuit is connected with the communication interfaces of the upper computer and the main control MCU.
5. The trademark cutter ironing board controller according to claim 1, characterized in that: the cutting knife control circuit comprises a voltage output driving circuit, a load current conversion voltage circuit and a cutting knife RL, wherein the input end of the voltage output driving circuit is respectively connected with the analog signal output port of the main control MCU and the output end of the load current conversion voltage circuit, the output end of the voltage output driving circuit is connected with the input end of the load current conversion voltage circuit, the output end of the load current conversion voltage circuit is also connected with the ADC input interface of the main control MCU, and the load current conversion voltage circuit is also connected with the cutting knife RL.
6. The trademark cutter ironing board controller as claimed in claim 5, wherein: the voltage output driving circuit comprises a resistor R4, a resistor R8, a resistor R10, a capacitor C1, a polar capacitor C3, a polar capacitor C4, an inductor L2, a diode D2 and a voltage feedback type power chip U6, wherein an analog signal output port of the main control MCU is connected with a first end of a resistor R4, a second end of the resistor R4 is respectively connected with a first end of a capacitor C1, a first end of a resistor R10, a first end of a resistor R8 and a feedback input end of a voltage feedback type power chip U6, a second end of a capacitor C1 is respectively connected with GND and a second end of a resistor R10, a second end of a resistor R8 is connected with an output end of a load current conversion voltage circuit, a voltage input end of the voltage feedback type power chip U6 is respectively connected with a positive electrode of a power supply DC48V and a positive electrode of a polar capacitor C3, a negative electrode of the polar capacitor C3 is connected with GND, a voltage output end of the voltage feedback type power chip U3, the second end of the inductor L2 is respectively connected with the anode of the polar capacitor C4 and the input end of the load current conversion voltage circuit, and the cathode of the polar capacitor C4 is grounded GND.
7. The trademark cutter ironing board controller as claimed in claim 5 or 6, wherein: the load current conversion voltage circuit comprises a resistor R5, a resistor R5 and an operational amplifier U5, wherein the output end of the voltage output driving circuit is respectively connected with a first end of the resistor R5 and a second end of the resistor R5, a second end of the resistor R5 is respectively connected with a first end of the resistor R5 and a first end of the resistor R5, a second end of the resistor R5 is respectively connected with an inverting input end of the operational amplifier U5 and a first end of the resistor R5, a second end of the resistor R5 is respectively connected with an output end of the operational amplifier U5, an output end of the operational amplifier U5 is respectively connected with an ADC input interface of the MCU main control, a second end of the resistor R5 is connected with a ground, a second end of the resistor R5 and a second end of the resistor R5 are respectively connected with a, the second end of the resistor R14 is respectively connected with the first end of the resistor R17 and the non-inverting input end of the operational amplifier U7, and the second end of the resistor R17 and the second end of the resistor R15 are both grounded GND.
8. The trademark cutter ironing board controller according to claim 1, characterized in that: the cutter control circuit comprises a cutter RL, an inductor L11, a diode D1, a resistor R1, a power supply control chip U1 and an operational amplifier U5, wherein an analog signal output port of the master control MCU is connected with a feedback input end of the power supply control chip U1, an output end of the power supply control chip U1 is respectively connected with a first end of the inductor L11 and a cathode of the diode D1, a second end of the inductor L11 is respectively connected with a first end of the resistor R1 and a positive phase input end of the operational amplifier U5, a second end of the resistor R1 is respectively connected with a negative phase input end of the operational amplifier U5 and an anode of the cutter RL, an anode of the diode D1 and a cathode of the cutter are both grounded, and an output end of the operational amplifier U5 is respectively connected with an ADC input interface of the master.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910905278.6A CN111240272A (en) | 2019-09-24 | 2019-09-24 | Trademark machine cutting knife ironing board controller |
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| CN201910905278.6A CN111240272A (en) | 2019-09-24 | 2019-09-24 | Trademark machine cutting knife ironing board controller |
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| CN111240272A true CN111240272A (en) | 2020-06-05 |
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