CN1220929A

CN1220929A - Electric-saving circuit of electric welder

Info

Publication number: CN1220929A
Application number: CN 97126122
Authority: CN
Inventors: 丛建敏
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-24
Filing date: 1997-12-24
Publication date: 1999-06-30
Anticipated expiration: 2017-12-24
Also published as: CN1060421C

Abstract

An electricity-saving circuit for electric welding machine features that a controller is attached to the main circuit of electric welding machine, which is composed of transformer and welding gun. Said controller is composed of ICs (7812, LM324 and NE555), photoelectric coupler, diodes, triodes, transformer, resistors and capacitors, and can be used to realize the electric saving on idle, overcrrent protection on welding and electric consumption accounting. Its advantages are high electricity-saving effect, high reliability, small size of control box and low cost.

Description

Welding machine electricity-saving circuit

The present invention relates to the control circuit of additional a kind of electric welding machine economize on electricity on the electric welding machine main circuit.

The integrated circuit of control economize on electricity when the electric welding machine that uses does not both at home and abroad still have zero load at present, China developed a kind of power save circuit of forming with resolution element in the past, but because the poor reliability of control electric welder no-load circuit, often cause electric welding machine outage and can't use, and power save circuit that is short-circuited when still not having the control welding and the circuit that measures the power consumption of electricity consumption.

The purpose of this invention is to provide a kind of power save circuit of saving energy when controlling electric welder no-load, the electricity-saving protection circuit when being short-circuited during welding, and the actual energy consumption economize on electricity metering circuit during the electric welding machine operate as normal.

Purpose of the present invention is implemented by following measure, with original electric welding machine B ₁With welding gun BX, K switch ₁For the welding main circuit, be additional to B ₁The K switch of elementary winding ₂, control transformer B ₂, at elementary winding two ends incoming transport contactor JC and relay normally open contact J, K ₂Fuse BX is inserted in the back ₁, K ₁After meet the normally opened contact JC of A.C. contactor, B ₂Secondary windings insert fuse BX ₂With rectifier D ₃-D ₆, it is characterized in that the output of rectifier anode meets 7812 integrated package of pressure-stabilizing IC ₁Pin 1, pin 2 ground connection are at IC ₁Insert electrochemical capacitor C between pin 1 and the pin 2 ₃, IC ₁Output pin 3 is+12 volts, and and pin 2 between insert capacitor C ₄And C ₅, at K ₂And B ₁Seal in capacitor C between elementary winding ₁, at electric welding machine B ₁Elementary winding inserts the resistance R of voltage sampling circuit ₁, diode D ₁With photoelectrical coupler C ₁, C ₁The emitter stage and the NE555 ic chip of phototriode output ₇Pin 2 joins, and through resistance R ₁₅Ground connection.C ₁Emission is through capacitor C ₂Back and C ₁Colelctor electrode joins and inserts LM324 integrated package 1C ₃Pin 4 and IC ₁Output pin 3 be+12 volts, IC ₃Pin 11 ground connection.At B ₁Elementary winding insert the current transformer H that current sampling circuit is used ₁, H ₁Output contact 201 meets diode D ₂, resistance R ₃, the LM324 ic chip ₃Pin 3, H ₁Output contact 201 is through resistance R ₂Back and H ₁Another output contact 202 joins and ground connection.At D ₂And R ₃The junction and ground between parallel resistance R ₈And capacitor C ₆, at IC ₃Pin 3 and ground between insert Zener diode D ₈, IC ₃Pin 2 and pin 1 join and insert the LM324 ic chip ₂Pin 6, IC ₂Pin 5 through resistance R ₅Ground connection, and through resistance R ₄Insert C ₁The pin 3 of output+12 volt, IC ₂Output pin 7 is through resistance R ₁₀, capacitor C ₁₀Back ground connection, and through diode D ₁₀With resistance R ₁₀IC is inserted in back in parallel ₇Pin 6, IC ₇Pin 8 meet IC ₁Pin 3, IC ₇Pin 1 ground connection, pin 5 through resistance R ₁₄Ground connection, pin 4 are through resistance R ₁₁Insert IC ₁Pin 3 and through capacitor C ₁₁Ground connection, pin 3 meet relay J and diode D in parallel ₁₁Back ground connection.

By R ₁, D ₁, C ₁, R ₁₅The photoelectrical coupler sample circuit of forming can be used transformer B ₃, elementary winding inserts electric welding machine B ₁Elementary winding two tip nodes 101,102.Transformer B ₃Secondary windings output terminating diode D ₁₄Contact 103 and NE555 ic chip are inserted in the back ₇Pin 2 join, this 103 contact connects capacitor C in parallel again ₈And resistance R ₁₇B is inserted in the back ₃The transformer type voltage sampling circuit of another output of secondary windings and ground connection replaces.

Insert electric welding machine B ₁The current transformer H of elementary winding ₁, also can insert electric welding machine B ₁Secondary windings.

On the circuit base of above-mentioned Fig. 1, at electric welding machine B ₁Secondary windings two tip nodes 301 places, insert resistance R again ₁₆, diode D ₁₃With photoelectrical coupler C ₂After receive contact 302 places, G ₂The colelctor electrode of phototriode insert IC ₁Pin 3, C ₂The phototriode emitter stage meet diode D ₁₈, the resistance R that connects in parallel ₂₄, capacitor C ₁₅Back ground connection, D ₁₈Insert IC ₇Pin 4, and through capacitor C ₁₁Ground connection, and resistance R ₁₁The former IC that connects ₁ Pin 3 ends disconnect back and C ₁₁Parallel connection, thus the short circuit current electricity-saving protection circuit that increases formed.

Above-described short circuit current electricity-saving protection circuit can adopt the circuit of current transformer formula to substitute, and physical circuit is at electric welding machine B ₁Secondary windings inserts current transformer H ₃, its output low level end ground connection, high level terminating diode D ₁₆, resistance R ₂₁, diode D ₁₇With triode BG ₃Base stage, BC ₇Colelctor electrode insert the NE555 ic chip ₇Pin 4, and through resistance R ₂₂Insert IC ₁Pin 3 outputs+12 volts, H ₃The high level output through resistance R ₁₉Back ground connection, diode D ₁₆Connect capacitor C in parallel ₁₃, resistance R ₂₀Back ground connection, triode BC ₃Colelctor electrode connect capacitor C in parallel ₁₄, resistance R ₂₃After connect self emitter stage and ground connection and the short circuit current electricity-saving protection circuit formed also can substitute with the circuit of transformer type.Physical circuit is, at electric welding machine B ₁Secondary windings two tip nodes 301,302 places insert transformer B ₄Elementary winding two ends, B ₄Secondary windings low level end ground connection, high level terminating diode D ₁₅After capacitor C in parallel ₁₂, resistance R ₁₈Back ground connection, and insert the NE555 ic chip ₇Pin 4, the short circuit current electricity-saving protection circuit of being formed.

On the basis of the circuit of described in front Fig. 4, increase the power consumption metering circuit, physical circuit consists of the ic chip of table LM324 ₄Pin 10 and IC ₃Output pin 1 join IC ₄Pin 9 and LM324 ic chip ₂Pin 5 join IC ₄Output pin 8, through parallel resistor R ₆, diode D ₇The NE555 ic chip is inserted in the back ₆Pin 4, connect capacitor C again ₇Back ground connection, IC ₆Pin 6 joins with pin 2, and through capacitor C ₉Ground connection, IC ₆Pin 3 connecting resistance R ₁₃, diode D ₉After meet IC ₆Pin 2, and with triode BG ₁Colelctor electrode joins, IC ₄Pin 10 meet potentiometer W ₁Back ground connection, W ₁Adjustable termination LM324 ic chip ₅Pin 12, IC ₅Pin 13 meets triode BG ₁Emitter stage, and through resistance R ₉, potentiometer W ₂Back ground connection, W ₂Adjustable end ground connection, IC ₆Pin 1 ground connection, pin 5 through resistance R ₇Ground connection, pin 7 insert triode BG ₂Base stage, and through resistance R ₁₂Photoelectrical coupler G is inserted in the back ₂The phototriode emitter stage, BG ₂Grounded emitter, BG ₂Colelctor electrode meet IC after inserting electromagnetic counter M ₁+ 12 volts of ends of pin 3 output, diode D ₁₂Power consumption metering circuit in parallel with M, as to be formed.

Two NE555 ic chips ₆And IC ₇, can be with a NE555 ic chip ₈Replace, concrete pin substitutes as follows: IC ₈Pin 7 replace IC ₆And IC ₇Pin 1, IC ₈ Pin 14 replace IC ₆And IC ₇Pin 8, IC ₈Pin 1,2,3,4,5,6 replace IC respectively ₆

7,6,5,4,3,2, IC ₈Pin 8,9,10,11,12 replace IC respectively ₇

2,3,4,5,6.

The present invention compared with the prior art, it is obvious to have power savings, and can measure electric welding machine welding power consumption, uses reliably, the control box volume is little, the advantage that cost is low.

Description of drawings is as follows:

Fig. 1 is the welding machine electricity-saving circuit line map;

Fig. 2 is a transformer voltage sample circuit line map;

Fig. 3 is current transformer H ₁Current sampling circuit inserts electric welding machine B ₁The line map of inferior utmost point winding;

Fig. 4 increases short circuit current electricity-saving protection circuit line map on Fig. 1 power save circuit;

Fig. 5 is the replacement circuit line map of short circuit current electricity-saving protection circuit among Fig. 4;

Fig. 6 is the another kind of replacement circuit line map 3 of short circuit current power save circuit among Fig. 4

Fig. 7 increases power consumption metering circuit line map on Fig. 4 power save circuit.

The present invention will be further described in conjunction with the accompanying drawings, and when needs carried out the electric welding welding, K closed a switch ₁And K ₂, control circuit power transformer B ₂The secondary windings output through rectifier D ₃-D ₆Output DC after the rectification, and through 7812 integrated package of pressure-stabilizing.IC ₁With filter capacitor C ₃, C ₄, C ₅The back obtains galvanic current and presses+12 volts, from IC ₁Pin 3 output; Electric welder transformer B ₁The elementary winding stream that powers on pass through capacitor C ₁After, the electric current of elementary winding is very little, at this moment resistance R ₁, diode D ₁With photoelectrical coupler C ₁Light emitting diode form the loop, the photosensitive triode of the optical excitation of light emitting diode, and in resistance R ₁₅Two ends produce pressure drop, make the NE555 ic chip ₇Pin 2 is in high level; Current transformer H ₁Because of B ₁Primary winding current is very little, so H ₁Output current is almost nil, R ₂The two ends no-voltage, the diode D of voltage stabilizing ₈The two ends no-voltage, ic chip ₃Pin 3 be in low level, IC ₃Pin 1 and IC ₂Pin 6 is a low level, IC ₂Pin 5 through R ₄Connect+12 volts, be in high electricity, IC ₂Output pin 7 is a high level, IC ₇Pin 6, through R ₁₀Meet IC ₂Pin 7 is so be in high level, IC ₇Pin 8 is a high level, IC ₇Pin 4 is through R ₁₁Connect+12 volts for high level, so IC ₇Output pin 3 places be low level, this moment the relay J no power, contactor JC does not switch on, so B ₁Circuit on the elementary winding is subjected to capacitor C ₁The restriction and electric current is very little, thereby reach the electric welder no-load aim of power saving.

When needs welded, welding gun BX impacted workpiece, makes B ₁The secondary windings instantaneous short circuit causes B ₁The primary winding current transient current increases, current transformer H ₁Output produces big electric current, resistance R ₂Two ends produce pressure drop, through diode D ₂Rectification and C ₆, R ₈Filtering, this DC voltage passes through R ₃Add to ic chip ₃Pin 3 and Zener diode D ₈Negative terminal, D ₆To guarantee IC ₃Pin 3 not breakdown because of overvoltage, IC ₃Pin 3 is in high level, IC ₃Output pin 1 and IC ₂Pin 6 is a high level, IC ₂Output pin 7 is a low level, because IC ₂Pin 7 and IC ₇Insert diode D between the pin 6 ₁₀Clamping action, make IC ₇Pin 6 is in low level, and owing to instantaneous short circuit, supply voltage almost all falls in capacitor C simultaneously ₁Two ends, 101,102 liang of voltages of locating of point are zero, through R ₁, D ₁, G ₁Both end voltage also be zero to make C ₁Turn-off R rapidly ₁₅Two ends do not have pressure drop, IC ₇Pin 2 is a low level, IC ₇Pin 3 be high level, relay J energising adhesive, its normally opened contact J closure, contactor JC energising, its normally opened contact JC closure, B ₁Elementary winding is connected, and electric current increases, welding gun BX and workpiece gap discharge, and electric welding machine is in normal welding running status.

When welding stops, B ₁The secondary windings electric current is zero, makes B ₁Primary winding current reduces, current transformer H ₁Output current becomes very little, resistance R ₂The two ends pressure drop is close to zero, IC ₃Pin 3 is in low level, IC ₃Pin 2 and pin 1 are low level, IC ₂Pin 6 is a low level, IC ₂Pin 7 upsets are for high level and pass through resistance R ₁₀To capacitor C ₁₀After the charging time-delay, IC ₇Pin 6 is in high level, IC ₇Output pin 3 becomes low level, and relay J discharges, and its normally opened contact J resets, the contactor JC release of cutting off the power supply, and normally opened contact JC resets, B ₁Elementary winding on electric current because of capacitor C ₁Reason, its electric current is very little, electric welding machine is in unloaded electricity-saving state.

As welding gun BX during,, make B owing to the operation reason causes welding rod to be bonded on the workpiece in welding job ₁Secondary windings is in short-circuit condition, and its electric current increases, and causes B ₁The electric current of elementary winding increases, at this moment, and from B ₁The voltage die at secondary windings contact 301,302 places is close to zero, at this moment photoelectrical coupler G ₂In light emitting diode turn-off the emitter stage no-output of phototriode, diode D ₁₈Cut off capacitor C ₁₁The voltage at two ends is through R ₁₁Make IC after the discharge time-delay ₇Pin 4 is in low level, IC ₇Output pin 3 upsets are low level, the relay J outage, and normally opened contact J resets, contactor JC outage, normally opened contact JC resets, B ₁Elementary winding cuts off, and only depends on capacitor C ₁Keep very little electric current, reach the huge short circuit current that the cutting-off of short-circuit causes, realize the short circuit current electricity-saving protection, and then eliminate short circuit, promptly welding gun BX and workpiece break away from.

When normal welding job state, B ₁ Secondary windings contact 301 places are to resistance R ₁₆Diode D ₁₃With photoelectrical coupler G ₂Light emitting diode form loops to contact 302, light emitting diode excites phototriode, makes its emitter stage output current, and in resistance R ₂₄Produce pressure drop, contact 304 current potentials are raise, and to capacitor C ₁₅Charging is along with capacitor C ₁₅The voltage at two ends raises, diode D ₁₈Conducting, and pass through resistance R ₁₁Produce pressure drop, simultaneously to capacitor C ₁₁Charging makes IC ₇Pin 4 be in high level, keep IC ₇The high level of pin 3 is in normal operating conditions.

When electric welding machine is in normal operating conditions, current transformer H ₁Output produces one and is varied to the electric current of direct ratio with welding current, and in resistance R ₂Two ends produce pressure drop, through diode D ₂Rectification and capacitor C ₆After the filtering, produce the pulsating dc voltage that is varied to direct ratio with welding current, this voltage is through resistance R ₃Add to IC ₃Input pin 3, IC ₃Pin 3 is in high level, IC ₃Pin 1 be high level IC ₄Pin 10 is a high level, IC ₅Pin 12 is with potentiometer W ₁The adjustment of adjustable end and be in suitable operating voltage, IC ₄Pin 8 is a high level, and through resistance R ₆Add to IC ₆Pin 4, IC ₆Pin 4 is in high level, IC ₅Pin 14 be high level, and add to triode BG ₁Base stage, make BG ₁Saturation conduction makes capacitor C ₉Pass through BG ₁, resistance R ₉, potentiometer W ₂After discharge is delayed time over the ground, IC ₆Pin 2 be in low level, IC ₆Pin 3 be high level, and pass through resistance R ₁₃With diode D ₉To capacitor C ₉Charging makes C ₇Both end voltage raises, IC ₆Pin 2 become high level, IC ₆Pin 3 becomes low level, C ₉To pass through BC again ₁, R ₉, W ₂Discharge over the ground, D at this moment ₉Two ends are in reverse blocking state because of adding backward voltage, and the frequency of generation of going round and beginning again like this is varied to the electric pulse of direct ratio in IC with welding current ₆Triode BG is exported and added to pin 7 ₂Base stage, BG like this ₂Base stage is by resistance R ₁₂Add to BG ₂After the voltage of base stage and pulse voltage are superimposed, by BG ₂Colelctor electrode outputs to electromagnetic counter M and counts, and then M is with its power consumption of welding current change records, and can reflect the consumption of welding rod, diode D ₁₂Prevent the reverse overvoltage when the M coil disconnects, regulator potentiometer W ₂, can adjust the operating frequency of M, obtain continuous data accurately.

When the electric welder no-load state, H ₁The output no current, IC ₄Pin 10 be low level, IC ₄Pin 9 be high level, IC ₄Pin 8 output low levels are again because of resistance R ₆, diode D ₇Be connected to IC after the parallel connection ₆Pin 4, and pass through capacitor C ₇Go into ground, make IC ₆Pin 4 be in low level, IC ₆Pin 3 output low levels, IC ₆The no electric pulses output of pin 7.M does not work.

When if welding machine is in spot welding or striking state, will be at IC ₄Pin 8 instantaneous high level appears, and through resistance R ₆To capacitor C ₇If charging is IC ₄Duration of pin 8 output high level much smaller than R ₆To C ₇Charging interval, IC then ₆Pin 4 still is in than low level, IC ₆The no electric pulse of pin 7 output, M does not still work, and plays short signal excision effect.When if welding is in short-circuit condition, photoelectrical coupler G ₂Turn-off, the current potential bust that makes contact 304 places is zero, then passes through resistance R ₁₂Add to IC ₆The voltage of pin 7 is zero, IC ₆The no electric pulse of pin 7 outputs, triode BG ₂Be in cut-off state, M does not work, thereby reaches the excision effect of short circuit huge current flow.Power consumption when making counter M only count record electric welding machine welding normal operating conditions, the welding rod that is consumed when reflecting normal the welding.

Claims

1, a kind of welding machine electricity-saving circuit that is additional to the electric welder transformer main circuit and forms has electric welding machine B ₁, welding gun BX, K switch ₁Main circuit, be additional to B ₁The K switch of elementary winding ₂, control power transformer at B ₂, at B ₂Elementary winding two ends incoming transport contactor JC and relay normally open contact J, K ₂Fuse BX is inserted in the back ₁, K ₁After meet contactor normally opened contact JC, B ₂Secondary windings inserts fuse BX ₂With rectifier D ₃-D ₆, it is characterized in that the positive termination integrated package of pressure-stabilizing of rectifier IC ₁Pin 1, at IC ₁Pin 1 and pin 2 between insert capacitor C ₃And ground connection, IC ₁Insert two shunt capacitance C between output pin 3 and the ground ₄And C ₅, at K ₂And B ₁Seal in capacitor C between elementary winding ₁, at electric welding machine B ₁Elementary winding inserts the resistance R that voltage sampling circuit is used ₁, diode D ₁With photoelectrical coupler G ₁, G ₁Output phototriode emitter stage and ic chip ₇Pin 2 join, and through resistance R ₁₅Ground connection, G ₁Emitter stage is through capacitor C ₂Back and G ₁Colelctor electrode joins and inserts ic chip ₃Pin 4 and IC ₁Pin 3 join IC ₃Pin 11 ground connection, at B ₁Elementary winding insert the current transformer H that current sampling circuit is used ₁, H ₁Output terminating diode D ₂, resistance R ₃, ic chip ₃Pin 3, H ₁Output is through resistance R ₂Back and H ₁Another output join and ground connection, at D ₂And R ₃Contact and ground between parallel resistance R ₃And capacitor C ₆, at IC ₃Pin 3 and ground between insert Zener diode D ₈, IC ₃Pin 2 and pin 1 join and insert ic chip ₂Pin 6, IC ₂Pin 5 through resistance R ₅Ground connection, and through resistance R ₄Insert IC ₁Output pin 3, IC ₂Output pin 7 is through resistance R ₁₀, capacitor C ₁₀Back ground connection, and through diode D ₁₀With resistance R ₁₀IC is inserted in back in parallel ₇Pin 6, IC ₇Pin 8 meet IC ₁Pin 3, IC ₇Pin 1 ground connection, pin 5 through resistance R ₁₄Ground connection, pin 4 are through resistance R ₁₁Insert IC ₁Pin 3 and through capacitor C ₁₁Ground connection, pin 3 meet relay J and diode D in parallel ₁₁Back ground connection.

2, welding machine electricity-saving circuit according to claim 1 is characterized in that said photoelectrical coupler sample circuit can use transformer B ₃Elementary winding insert contact 101 and 102, B ₃Secondary windings one end through diode D ₁₄Contact 103, this contact and capacitor C in parallel are inserted in the back ₈And resistance R ₁₇Connect back ground connection, B ₃The transformer sample circuit of secondary windings other end ground connection substitutes.

3, welding machine electricity-saving circuit according to claim 1 is characterized in that said current transformer H ₁Can insert electric welding machine B ₁Secondary windings.

4, a kind of welding machine electricity-saving circuit that is additional to the electric welder transformer main circuit and forms has the described power save circuit of claim 1, it is characterized in that electric welding machine B ₁Secondary windings contact 301 places insert resistance R ₁₆, diode D ₁₃With photoelectrical coupler G ₂After be connected to contact 302 places, G ₂The colelctor electrode of phototriode insert IC ₁Pin 3, G ₂The phototriode emitter stage meet diode D ₁₈, the resistance R that connects in parallel ₂₄, capacitor C ₁₅Back ground connection, D ₁₈Insert IC ₇Pin 4, and through capacitor C ₁₁Ground connection.And resistance R ₁₁The former IC that connects ₁Pin 3 ends disconnect back and C ₁₁The short circuit current electricity-saving protection circuit is formed in parallel connection.

5, welding machine electricity-saving circuit according to claim 4 is characterized in that said short circuit current electricity-saving protection circuit, can be by R ₁Secondary windings insert current transformer H ₃, its output low level end ground connection, high level terminating diode D ₁₆, resistance R ₂₁, diode D ₁₇With triode BG ₃Base stage, BG ₃Colelctor electrode insert IC ₇Pin 4, and through resistance R ₂₂Insert IC ₁Pin 3, H ₃The high level end through resistance R ₁₉Back ground connection, D ₁₆Connect capacitor C in parallel ₁₃, resistance R ₂₀Back ground connection, BG ₃Colelctor electrode insert capacitor C in parallel ₁₄, resistance R ₂₃The short circuit current electricity-saving protection circuit of back sending and receiving emitter-base bandgap grading and ground connection replaces.

6, welding machine electricity-saving circuit according to claim 4 is characterized in that said short circuit current electricity-saving protection circuit, also can be by B ₁Secondary windings inserts transformer B ₄, B ₄Secondary windings low level end ground connection, high level terminating diode D ₁₅After capacitor C in parallel ₁₂, resistance R ₁₈Back ground connection, and insert IC ₇The short circuit current electricity-saving protection circuit of pin 4 replace.

7, a kind of welding machine electricity-saving circuit that is additional to the electric welder transformer main circuit and forms has the described power save circuit of claim 4, it is characterized in that ic chip ₄Pin 10 and IC ₃Output pin 1 join IC ₄Pin 9 and IC ₂Pin 5 join IC ₄Output pin 8 through parallel resistor R ₆, diode D ₇IC is inserted in the back ₆Pin 4, connect capacitor C again ₇Back ground connection, IC ₆Pin 6 joins with its pin 2, and through capacitor C ₉Ground connection, IC ₆Pin 3 connecting resistance R ₁₃, diode D ₉After meet IC ₆Pin 2, and with triode BC ₁Colelctor electrode joins, IC ₄Pin 10 meet potentiometer W ₁Back ground connection, W ₁Adjustable termination IC ₅Pin 12, IC ₅Pin 13 meets BG ₁Emitter stage, and through resistance R ₉, potentiometer W ₂Back ground connection, W ₂Adjustable end ground connection, IC ₆Pin 1 ground connection, pin 5 through resistance R ₇Ground connection, pin 7 insert triode BG ₂Base stage, and through resistance R ₁₂G is inserted in the back ₂The phototriode emitter stage, BG ₂Grounded emitter, BG ₂Colelctor electrode meet IC after inserting electromagnetic counter M ₁Pin 3, diode D ₁₂In parallel with M, form the power consumption metering circuit.

8, welding machine electricity-saving circuit according to claim 7 is characterized in that said ic chip ₆And IC ₇, can use ic chip ₈Pin 7 replace IC ₆And IC ₇Pin 1, IC ₈Pin 14 replace IC ₆And IC ₇Pin 8, IC ₈Pin 1,2,3,4,5,6 replace IC respectively ₆Pin 7,6,5,4,3,2, IC ₈Pin 8,9,10,11,12 replace IC respectively ₇Pin 2,3,4,5,6.