CN107065776A - A kind of industrial lathe automation control system - Google Patents
A kind of industrial lathe automation control system Download PDFInfo
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- CN107065776A CN107065776A CN201710179742.9A CN201710179742A CN107065776A CN 107065776 A CN107065776 A CN 107065776A CN 201710179742 A CN201710179742 A CN 201710179742A CN 107065776 A CN107065776 A CN 107065776A
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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
- G05B19/406—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 characterised by monitoring or safety
- G05B19/4067—Restoring data or position after power failure or other interruption
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The present invention relates to technical field of automatic control, and in particular to a kind of industrial lathe automation control system, including current detection circuit, current foldback circuit, frequency conversion control circuit and reset control circuit；When people does not step on carpet, DC24V voltages are passed through, 22,21 pin of circuit and external carpet are inputted to 24,23 pin, this voltage delivers to 05,06 base stage through resistance 472,470 respectively, makes Q5, Q6 saturation conduction, optocoupler U2, U3 action, so, Q3 pipes are because base potential is high and ends, and Q4 pipes are because base potential is low and ends, and relay RLl, RL2, RL3 are failure to actuate.12 pin are not exported.Now, supply voltage is through group, resistance 22l, short circuit piece J2, U3 level formation loop of optocoupler, optocoupler Ul conductings at the beginning of RL2 normally-closed contacts, short circuit piece J1, resistance 472, voltage-stabiliser tube DW2, optocoupler Ul.The present invention is simple in construction, and simple operation, security performance is higher, with very strong creativeness.
Description
Technical field
The present invention relates to technical field of automatic control, and in particular to a kind of industrial lathe automation control system.
Background technology
Lathe refers to the machine of manufacture machine, also known as machine-tool or toolroom machine, traditionally abbreviation lathe.It is generally divided into gold
Belong to stock-removing machine, forging machine tool and wood craft machines etc..The method of processing equipment part is many in modern mechanical manufacturing：Except cutting adds
Outside work, also casting, forging, welding, punching press, extruding etc., as long as category required precision is higher and surface roughness requirements are thinner
Part, typically all need on lathe with cutting method finally processed.Lathe rises in the construction of national economic modernization
Significant role.Lathe is the main lathe for carrying out turnery processing to the workpiece of rotation with lathe tool.Also can use on lathe drill bit,
Reamer, reamer, screw tap, screw die and checkering tool etc. are processed accordingly.Lathe be mainly used in processing axle, disk, set and its
He has the workpiece of rotary surface, is using a most wide class lathe in machine-building and repair factory.The lathe of quattrocento
Blank, the need for manufacturing clock and watch and weapon, occurs in that the thread chasing machine and gear cutting machine of clock and watchmaker, and waterpower
The gun-boring machine of driving.1501 or so, Italian Lie Aonaduo Leonardo da Vincis once drew lathe, boring machine, screw thread process
The conception sketch of lathe and internal grinder, wherein the new mechanism such as crank, flywheel, top and bearing.What Ming Dynasty Chinese was published
《Tian Gong Kai Wu》In be also loaded with the structure of grinding machine, rotate iron pan with foot-operated method, add sand and water carrys out cutting jade.Work
Industry revolution result in the generation and improvement of various lathes.The industrial revolution in 18th century has promoted the development of lathe., English in 1774
Compatriots' Wilkinson has invented more accurate gun-boring machine.Next year, the cylinder that he is bored with this gun-boring machine meets watt
The requirement of steam engine.For the bigger cylinder of boring system, he has manufactured the cylinder reboring machine of a water wheels driving in 1775, promoted again
The development of steam engine.From this, lathe starts to be driven by bent axle with steam engine.How the security performance of lathe is improved, simultaneously
The problem of service life for improving each part of lathe is those skilled in the art's urgent need to resolve.Digit Control Machine Tool be machining accuracy it is high and
With the stable high-tech lathe for adding lower quality, the linkage of multi-coordinate can be carried out, can the complicated part of machining shape.In patent
Number for CN201510553302 patent document in, disclose a kind of Control System of NC Machine, including MCU controllers, stepping
Motor, screw mandrel, platen, main shaft, cutter and bearing, the command pulse of the MCU controllers output and stepping are electronic
Machine is connected, and the drive shaft of the stepping motor is connected with screw mandrel, and the screw mandrel two ends are connected with bearing, the silk
Bar is cooperated with platen and is connected, and main spindle box is provided with above the platen.The present invention passes through MCU controllers
The feeding command signal of output controls drive motor by pulsqe distributor, additionally by setting speed detector and position
Detector, the position detector is connected by signal wire with position comparator, and the speed detector passes through signal wire and speed
Controller is spent to be connected；And by feeding back the driving error in whole mechanical drive train of the elimination from motor to platen,
So as to obtain the accurate location of platen；It is easy to control, simple in construction, cheap.
The feeding command signal that above-mentioned patent document is exported by MCU controllers controls driving electricity by pulsqe distributor
Motivation, additionally by speed detector and position detector is set, directly examines the straight-line displacement M of side platen coordinate, and
By feeding back the driving error in whole mechanical drive train of the elimination from motor to platen.But for how to provide
A kind of simple in construction, simple operation, the higher industrial lathe automation control system of security performance lacks technical solution.
The content of the invention
(1) technical problem solved
In view of the shortcomings of the prior art, the invention provides a kind of industrial lathe automation control system, for solving such as
What provides a kind of simple in construction, simple operation, the problem of security performance higher industrial lathe automation control system.
(2) technical scheme
To realize object above, the present invention is achieved by the following technical programs：
A kind of industrial lathe automation control system, including CNC system, the CNC system include program, input and output and set
Standby, computer numerical control (CNC) device, programmable controller, Spindle control unit and speed control unit, it is characterised in that：Including
Current detection circuit, current foldback circuit, frequency conversion control circuit and reset control circuit, the letter of the current detection circuit detection
Hall sensor is set in number and is output as current signal Is, in order to send A/D converter to be changed current signal, by Hall
The measurement resistance Rm of output resistance known to of sensor, its both end voltage drop Vm is directly proportional to current signal Is, electric current letter
Number it is voltage signal Vm with regard to linear transformation, you can send into computer after analog/digital conversion, carry out current detecting, electric capacity C plays filtering
Effect, potentiometer VR provides reference voltage, and regulation VR can change the supply voltage value for acting protection circuit, Iu1 and Iw1
Through comparator relatively after, its output signal is sent to logic chip after optocoupler, with three-phase alternating voltage detection signal logic after
Signal SPDPING is produced, DSP power drive protection interrupting input is sent to, goes to block DSP PWM mouths, all PWM efferent ducts
The all high-impedance states of pin, while sending an interrupt requests to DSP core, notify CPU to have abnormal conditions, the reset
As long as controlling the upper carpet in people station in circuit, relay ZJ actions, whole reset control circuit power supply is cut off；People leaves carpet
Afterwards, electricity recovers.
It is preferred that, 5., the 6. external SR of pin 14,15 pin meet DC24V in the reset control circuit, outside 18,19 pin
Connect testing button, 11,12 pin are rear class 24V power supply pin, 21,22,23, the 24 external Press lines of pin, wherein 21 and 23 is logical,
22 and 24 lead to.People does not step on carpet, is in high-impedance state between 21,23 pin and 22,24 pin, and people once steps on carpet, 21,23 pin and
22nd, resistance drops to about 10 Ω between 24 pin.
It is preferred that, when people does not step on carpet in the reset control circuit, DC24V voltages warp, 22,21 pin of circuit and outer
Ground connection blanket is inputted to 24,23 pin, and this voltage delivers to 05,06 base stage through resistance 472,470 respectively, makes Q5, Q6 saturation conduction, light
Coupling U2, U3 are acted, so, Q3 pipes because base potential is high and ends, Q4 pipes because base potential is low and ends, relay RLl, RL2,
RL3 is failure to actuate.12 pin are not exported.Now, supply voltage through RL2 normally-closed contacts, short circuit piece J1, resistance 472, voltage-stabiliser tube DW2,
Just group, resistance 22l, short circuit piece J2, U3 level of optocoupler form loop, optocoupler Ul conductings to optocoupler Ul.
It is preferred that, press 5., the SR that 6. pin is connect, electric capacity C4, C5 positive pole through short circuit piece J3, SR,
Short circuit piece J4 and the pin short circuit of power cathode 23, because there is voltage at electric capacity two ends, capacitance cathode is connect after power cathode, electric capacity two ends
Voltage can not be mutated, and electric capacity C4, C5 cut Q5, Q6 equivalent to a negative voltage is added to triode Q5, Q6 base stage respectively
Only, optocoupler U2, U3 is without output, and optocoupler U1 is normally exported.So, triode 04 is because base potential rises and turns on；Relay
Device RLl, RL3 adhesive, RLl one group of normally opened contact closure self-locking；Meanwhile, triode Q3 base stage is also through resistance 102, optocoupler U1
Secondary, voltage-stabiliser tube DW3, resistance 2.2k Ω, RLl normally-closed contact are to 23 pin, RL2 also adhesives, because there is an electricity at C1, C2 two ends
Pressure, even if RLl, RL3 adhesive and RL2 not adhesives or vice versa.Now 10. pin has DC24V outputs, and machine can normally start work.
It is preferred that, when people steps on carpet in the reset control circuit, resistance is reduced to about 10 between 21~23 and 22~24 pin
Ω, close to short circuit, voltage declines between 21,23 bipods, relay RLl, RL2, RL3 release, meanwhile, the base potential of triode 92
Decline, control Q1 conducting degree reductions, output current reduces.
It is preferred that, control terminal mainly has rotating forward control terminal STF in the frequency conversion control circuit, by Y3 controls, and
The control terminal of three fast sections, high-speed terminal RH, middling speed terminal RM and low speed terminal RL, are controlled by PLC Y2, Y1, Y0 respectively,
Using PLC output ends control frequency converter when, it is necessary to which the corresponding common port COM of PLC output ends is connected with SD.
It is preferred that, biphase current signal Iu, Iv that Hall sensor is detected are converted to voltage signal by process circuit
After CH1A, CH2A, then MAX125 chips are sent to carry out analog/digital conversion.Because linear electric motors winding uses Y-connection, according to motor
Learn principle：Iu+Iv+Iw=0 can obtain Iw after Iu, Iv is detected by calculating.Therefore only need to be to three-phase in hardware design
Any two-phase in alternating current is detected, D/A switch, to reduce hardware cost.
(3) beneficial effect
When people does not step on carpet in the present invention, DC24V voltages warp, 22,21 pin of circuit and external carpet are inputted to 24,23
Pin, this voltage delivers to 05,06 base stage through resistance 472,470 respectively, makes Q5, Q6 saturation conduction, and optocoupler U2, U3 are acted, so,
Q3 pipes are because base potential is high and ends, and Q4 pipes are because base potential is low and ends, and relay RLl, RL2, RL3 are failure to actuate.12 pin do not have
There is output.Now, supply voltage is through group, resistance at the beginning of RL2 normally-closed contacts, short circuit piece J1, resistance 472, voltage-stabiliser tube DW2, optocoupler Ul
22l, short circuit piece J2, U3 level formation loop of optocoupler, optocoupler Ul conductings when people steps on carpet, hinder between 21~23 and 22~24 pin
Value is reduced to about 10 Ω, close to short circuit, and voltage declines between 21,23 bipods, relay RLl, RL2, RL3 release, meanwhile, triode
92 base potentials decline, and control Q1 conducting degree reductions, output current reduces, simple in construction, simple operation of the invention, security
Can be higher, with very strong creativeness.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the lathe composition frame chart of the present invention；
The current detection signal process circuit group that Fig. 2 is the present invention tries hard to；
Fig. 3 is the current foldback circuit schematic diagram of the present invention；
Fig. 4 is the frequency conversion control circuit schematic diagram of the present invention；
Fig. 5 is the reset control circuit schematic diagram of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
A kind of industrial lathe automation control system, including CNC system, CNC system include program, input-output equipment,
Computer numerical control (CNC) device, programmable controller, Spindle control unit and speed control unit, it is characterised in that：Including electricity
Set in current detection circuit, current foldback circuit, frequency conversion control circuit and reset control circuit, the signal of current detection circuit detection
Hall sensor is output as current signal Is, in order to send A/D converter to be changed current signal, by Hall sensor
Output be directly proportional by the measurement resistance Rm of known resistance, its both end voltage drop Vm to current signal Is, current signal is with regard to line
Property be converted to voltage signal Vm, you can send into computer after analog/digital conversion, carry out current detecting, electric capacity C plays the work of filtering
Provide reference voltage with, potentiometer VR, regulation VR can change the supply voltage value for acting protection circuit, Iu1 and Iw1 through than
Compared with device relatively after, its output signal is sent to logic chip after optocoupler, with three-phase alternating voltage detection signal logic after produce
Signal SPDPING, is sent to DSP power drive protection interrupting input, goes to block DSP PWM mouths, all PWM output pins are complete
Portion is high-impedance state, while sending an interrupt requests to DSP core, notifies CPU to have abnormal conditions, reset control circuit
As long as the middle upper carpet in people station, relay ZJ actions, whole reset control circuit power supply is cut off；People is left after carpet, and electricity recovers.
5., the 6. external SR of pin 14,15 pin meet DC24V in reset control circuit, 18, the 19 external testing buttons of pin,
11st, 12 pin are rear class 24V power supply pin, 21,22,23, the 24 external Press lines of pin, wherein 21 and 23 is logical, 22 and 24 lead to.People
Carpet is not stepped on, is in high-impedance state between 21,23 pin and 22,24 pin, people once steps on carpet, between 21,23 pin and 22,24 pin
Resistance drops to about 10 Ω.
When people does not step on carpet in reset control circuit, DC24V voltages warp, 22,21 pin of circuit and external carpet are inputted
To 24,23 pin, this voltage delivers to 05,06 base stage through resistance 472,470 respectively, makes Q5, Q6 saturation conduction, and optocoupler U2, U3 are moved
Make, so, Q3 pipes are because base potential is high and ends, and Q4 pipes are because base potential is low and ends, and relay RLl, RL2, RL3 are motionless
Make.12 pin are not exported.Now, supply voltage is through RL2 normally-closed contacts, short circuit piece J1, resistance 472, voltage-stabiliser tube DW2, optocoupler Ul
First group, resistance 22l, short circuit piece J2, U3 level formation loop of optocoupler, optocoupler Ul conductings.
Press 5., the SR that 6. pin is connect, electric capacity C4, C5 positive pole are through short circuit piece J3, SR, short circuit piece J4
With the pin short circuit of power cathode 23, because there is voltage at electric capacity two ends, capacitance cathode is connect after power cathode, and the voltage at electric capacity two ends can not
Mutation, electric capacity C4, C5 end Q5, Q6 equivalent to a negative voltage is added to triode Q5, Q6 base stage respectively, optocoupler U2,
U3 is without output, and optocoupler U1 is normally exported.So, triode 04 is because base potential rises and turns on；Relay RLl, RL3 inhale
Close, RLl one group of normally opened contact closure self-locking；Meanwhile, triode Q3 base stage is also through resistance 102, U1 level of optocoupler, voltage-stabiliser tube
DW3, resistance 2.2k Ω, RLl normally-closed contact are to 23 pin, RL2 also adhesives, because there is a voltage at C1, C2 two ends, even if RLl,
RL3 adhesives and RL2 not adhesives or vice versa.Now 10. pin has DC24V outputs, and machine can normally start work.
When people steps on carpet in reset control circuit, resistance is reduced to about 10 Ω between 21~23 and 22~24 pin, close to short
Voltage declines between road, 21,23 bipods, relay RLl, RL2, RL3 release, meanwhile, the base potential of triode 92 declines, and controls Q1
Conducting degree is reduced, and output current reduces.
Control terminal mainly has rotating forward control terminal STF in frequency conversion control circuit, by the control of Y3 controls, and three fast sections
Terminal processed, high-speed terminal RH, middling speed terminal RM and low speed terminal RL, are controlled by PLC Y2, Y1, Y0, are exported using PLC respectively
, it is necessary to which the corresponding common port COM of PLC output ends is connected with SD during the control frequency converter of end.
Biphase current signal Iu, Iv that Hall sensor is detected by process circuit be converted to voltage signal CH1A,
After CH2A, then MAX125 chips are sent to carry out analog/digital conversion.It is former according to Electrical Motor because linear electric motors winding uses Y-connection
Reason：Iu+Iv+Iw=0 can obtain Iw after Iu, Iv is detected by calculating.Therefore only need to be to three-phase alternating current in hardware design
Any two-phase in electricity is detected, D/A switch, to reduce hardware cost.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a kind of industrial lathe automation control system, including CNC system, the CNC system include program, input and output and set
Standby, computer numerical control (CNC) device, programmable controller, Spindle control unit and speed control unit, it is characterised in that：Including
Current detection circuit, current foldback circuit, frequency conversion control circuit and reset control circuit, the letter of the current detection circuit detection
Hall sensor is set in number and is output as current signal Is, in order to send A/D converter to be changed current signal, by Hall
The measurement resistance Rm of output resistance known to of sensor, its both end voltage drop Vm is directly proportional to current signal Is, electric current letter
Number it is voltage signal Vm with regard to linear transformation, you can send into computer after analog/digital conversion, carry out current detecting, electric capacity C plays filtering
Effect, potentiometer VR provides reference voltage, and regulation VR can change the supply voltage value for acting protection circuit, Iu1 and Iw1
Through comparator relatively after, its output signal is sent to logic chip after optocoupler, with three-phase alternating voltage detection signal logic after
Signal SPDPING is produced, DSP power drive protection interrupting input is sent to, goes to block DSP PWM mouths, all PWM efferent ducts
The all high-impedance states of pin, while sending an interrupt requests to DSP core, notify CPU to have abnormal conditions, the reset
As long as controlling the upper carpet in people station in circuit, relay ZJ actions, whole reset control circuit power supply is cut off；People leaves carpet
Afterwards, electricity recovers.
2. industrial lathe automation control system according to claim 1, it is characterised in that：In the reset control circuit
5., the 6. external SR of pin 14th, 15 pin meet DC24V, and 18, the 19 external testing buttons of pin, 11,12 pin are rear class 24V power supply controls
Pin processed, 21,22,23, the 24 external Press lines of pin, wherein 21 and 23 is logical, 22 and 24 lead to.People does not step on carpet, 21,23 pin and
22nd, in high-impedance state between 24 pin, people once steps on carpet, and resistance drops to about 10 Ω between 21,23 pin and 22,24 pin.
3. industrial lathe automation control system according to claim 2, it is characterised in that：In the reset control circuit
When people does not step on carpet, DC24V voltages warp, 22,21 pin of circuit and external carpet are inputted to 24,23 pin, and this voltage is passed through respectively
Resistance 472,470 delivers to 05,06 base stage, makes Q5, Q6 saturation conduction, and optocoupler U2, U3 are acted, and so, Q3 pipes are because of base potential
High and end, Q4 pipes are because base potential is low and ends, and relay RLl, RL2, RL3 are failure to actuate.12 pin are not exported.Now, it is electric
Source voltage is through group, resistance 22l, short circuit piece J2, light at the beginning of RL2 normally-closed contacts, short circuit piece J1, resistance 472, voltage-stabiliser tube DW2, optocoupler Ul
U3 level formation loop of coupling, optocoupler Ul conductings.
4. industrial lathe automation control system according to claim 3, it is characterised in that：Press 5., 6. that pin is connect
SR, electric capacity C4, C5 positive pole are through short circuit piece J3, SR, short circuit piece J4 and the pin short circuit of power cathode 23, due to electricity
Holding two ends has voltage, and capacitance cathode is connect after power cathode, and the voltage at electric capacity two ends can not be mutated, and electric capacity C4, C5 are equivalent to respectively
A negative voltage is added to triode Q5, Q6 base stage, ends Q5, Q6, optocoupler U2, U3 are without output, and optocoupler U1 is normally defeated
Go out.So, triode 04 is because base potential rises and turns on；Relay RLl, RL3 adhesive, RLl one group of normally opened contact is closed
Close self-locking；Meanwhile, triode Q3 base stage also through resistance 102, U1 level of optocoupler, voltage-stabiliser tube DW3, resistance 2.2k Ω, RLl it is normal
Closed contact is to 23 pin, RL2 also adhesives, because there is a voltage at C1, C2 two ends, even if RLl, RL3 adhesive and RL2 not adhesives or anti-
It.Now 10. pin has DC24V outputs, and machine can normally start work.
5. industrial lathe automation control system according to claim 2, it is characterised in that：In the reset control circuit
When people steps on carpet, resistance is reduced to about 10 Ω between 21~23 and 22~24 pin, close to short circuit, and voltage declines between 21,23 bipods,
Relay RLl, RL2, RL3 discharge, meanwhile, the base potential of triode 92 declines, and control Q1 conducting degree reductions, output current subtracts
It is small.
6. industrial lathe automation control system according to claim 1, it is characterised in that：In the frequency conversion control circuit
Control terminal mainly has rotating forward control terminal STF, by the control terminal of Y3 controls, and three fast sections, high-speed terminal RH, middling speed
Terminal RM and low speed terminal RL, is controlled by PLC Y2, Y1, Y0 respectively, is controlled using PLC output ends during frequency converter, it is necessary to incite somebody to action
The corresponding common port COM of PLC output ends is connected with SD.
7. industrial lathe automation control system according to claim 1, it is characterised in that：What Hall sensor was detected
Biphase current signal Iu, Iv is converted to after voltage signal CH1A, CH2A by process circuit, then send MAX125 chips carry out mould/
Number conversion.Because linear electric motors winding uses Y-connection, according to Electrical Motor principle：Iu+Iv+Iw=0 is detecting Iu, Iv
Afterwards, Iw can be obtained by calculating.Therefore any two-phase in three-phase alternating current need to only be detected in hardware design, it is several/
Mould is changed, to reduce hardware cost.
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