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Section E | TABLE OF CONTENTS | Section E |
| - THEORY OF OPERATION SECTION - |
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Theory of Operation | Section E |
General Description | |
Control Circuit Operation | |
Input Power Circuit | |
Welding Current Circuit | |
Feedback and Control Circuits | |
Trigger Circuit | |
Optional Circuits | |
Contactor | |
Gas Solenoid | |
Protective Devices & Circuits | |
Overvoltage Shutdown | |
Motor Overload Shutdown | |
Control PC Board Fuses |
FIGURE E.1 THEORY OF OPERATION BLOCK DIAGRAM
ELECTRODE INPUT CABLE
TO WORK
SENSING LEAD
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| OPTIONAL |
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| CONTACTOR |
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| CONDUCTOR | GUN CABLE | |
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| BLOCK |
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COLD |
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| M |
| GUN |
| OPTIONAL | O | HALL | TRIGGER | |
INCH |
| T | CONNECTOR | ||
SWITCH | CONTACTOR | O | EFFECT |
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| BOARD | R | MODULE |
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P |
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O S |
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L W |
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| ARMATURE VOLTAGE |
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A I | VOLT |
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R T |
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I C | METER | CONTROL | RPM FEEDBACK |
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T H |
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Y |
| BOARD |
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WIRE FEED |
| RANGE |
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| SWITCH |
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MODE SWITCH |
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| WIRE SPEED |
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| CONTROL |
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| SOLENOID | GAS |
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| PC BOARD | SOLENOID |
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| EARLY MODELS ONLY - LATER MODELS HAVE CIRCUITRY |
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| INCLUDED ON CONTROL BOARD |
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