THEORY OF OPERATION
SectionTOC | MasterTOC |
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| FIGURE E.5 – WELD CONTROL BOARD |
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| CHOPPER |
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| TRANSFORMER |
| RECTIFIER |
| ASSEMBLY |
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Return | Return |
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| TERMINAL |
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| IGBT |
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| CURRENT |
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| TRANSDUCER |
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| VAC |
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| RECONNECT |
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| NEG |
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| 30 |
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| CURRENT | TERMINAL |
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| LINE | 115 |
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| 40 VDC |
| POWER | 20 VDC | FEEDBACK |
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| VAC |
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| SWITCH | VAC |
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| DIODE CONTROL |
| PWM |
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| SIGNALS |
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| RELAY |
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| CHOPPER |
| DRIVE |
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TOC | TOC |
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| WELD CONTROL BOARD |
| RS232 |
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| FAN |
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| CONNECTOR |
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| MOTOR |
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Section | Master |
| FROM WELD | VDC |
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| CONTROL BOARD |
| THERMOSTATS |
| SHIELDED CABLE AND SPI COMMUNICATIONS |
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FOOT AMPTROL OR REMOTE |
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| ARCLINK |
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| +5 VDC |
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| SPOOL | 40 VDC |
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| ENCODER | DISPLAY |
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to | to |
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| SHIELDED | FEEDER | MSP |
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| 24 VDC |
| GUN | CABLE |
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| BOARD | BOARD |
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| BOARD | BOARD |
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Return | Return |
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| BOARD |
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| (Below code 10900) |
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SPOOL GUN OR |
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| GUN TRIGGER AND THUMB SWITCH |
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| SPOOL GUN |
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| GAS |
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| SOLENOID |
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| SWITCH |
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| C |
| Mechanical Encoders |
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| (Above code 10900) |
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| WIRE DRIVE |
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| MOTOR |
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TOC | TOC | DIODE CONTROL RECTIFIER AND |
POWER BOARD | ||
Section | Master | the Diode Control Rectifier. In turn, the Power Board |
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| The Power Board receives approximately 40 VDC from |
to | to | supplies a variety of regulated DC voltages to the Weld |
Return | Return | Control Board, which it uses to power its many circuits |
supplies +20 VDC to the Chopper Assembly. | ||
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| and communication functions. The Power Board also |
TOC | TOC |
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Returnto Section | Returnto Master | POWER MIG 300 |
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| NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion. |
