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THEORY OF OPERATION
FIGURE E.2 – BATTERY, STARTER, ENGINE ALTERNATOR AND OIL SWITCH CIRCUIT
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| SELECTOR |
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| SWITCH |
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| REED |
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| IDLER |
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| RELAY | NEGATIVE |
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| BOARD |
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| CR2 | |
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| OUTPUT | |
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| TERMINAL |
| ENGINE | OIL |
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| HOUR | PRESSURE |
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| METER | LIGHT |
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| IDLER |
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| SOLENOID |
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| OIL |
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| GENERATOR |
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| PRESSURE |
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| FRAME |
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| SWITCH |
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| SERIES |
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| RESIDUAL |
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| COILS |
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| MAGNETISM |
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| FUEL |
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| SHUTDOWN |
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| SHUNT |
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| BRUSHES & | COMMUTATOR |
| FIELD |
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SWITCH |
| ENGINE | MECHANICAL | GENERATOR | ARMATURE | EXCITER | 115 VDC | ||
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| DC |
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| ENGINE |
| COUPLING | ARMATURE |
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| SHAFT | ARMATURE | RECEPTACLE |
IGNITION | IGNITION |
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ENGINE |
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| ALTERNATOR |
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| SERIES |
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| INTERPOLE |
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| FIELD |
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| COILS |
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| STARTER |
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| MOTOR |
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| FIELD |
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| SHUNT |
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| WINDINGS |
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| BATTERY |
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| GENERATOR |
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| FIELD CONTROL |
| POSITIVE |
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| OUTPUT |
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| TERMINAL |
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GENERAL DESCRIPTION
The Classic I is a heavy duty, engine driven, DC arc welding power source capable of providing constant current output for stick welding or DC TIG welding. Also, a total of 1750 watts of auxiliary power is available at the 115VDC receptacle. The Classic I is manufac- tured with all copper windings.
BATTERY, STARTER, ENGINE ALTERNATOR AND OIL SWITCH CIRCUIT
The 12VDC battery powers the starter motor and, through the ignition switch, the engine ignition and fuel shutoff solenoid. The engine alternator supplies "charging" current for the battery circuit. If the oil pres- sure switch does not close, due to low oil pressure or inadequate oil supply, the oil pressure light will not glow, the hour meter will not operate and the engine alternator will not function.
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.