Return to Section TOC
Return to Section TOC
Return to Master TOC
Return to Master TOC
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| THEORY OF OPERATION |
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| FIGURE E.3 — INPUT POWER & TRIGGER CIRCUIT |
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| ELECTRODE |
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| 67 |
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| INPUT |
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| INPUT |
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| CONTACTOR CURRENT TRANSDUCER |
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| FEEDPLATE |
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| SOLENOID |
| POLARITY |
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| TIMER OPTION |
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| V M |
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| MOTOR | TACH |
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| GUN | ||||||||||||
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| MOTOR |
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| OVERLOAD |
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| ARMATURE |
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| CONTROL |
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| 21 |
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| TACH FEEDBACK |
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| GUN TRIGGER |
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| WIRE | REMOTE | ||||||
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| 14 PIN AMPHENOL |
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| SPEED | VOLTAGE | |||||||||||||
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| COLD |
| CC |
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| TRIGGER |
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| FEED |
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| INTERLOCK |
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| PURGE |
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| DIGITAL |
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| RUN IN |
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| DISPLAY |
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| BOARD |
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Return to Section TOC
Return to Master TOC
INPUT POWER
The DC input voltage is applied from the power source via the electrode cable and the work sensing lead on the across the arc model. With the control cable model 24 to 42VDC is supplied from the power source via the control cable and the work sense lead.
This voltage is applied through a bridge rectifier and an analog voltmeter (across the arc), or digital meter (con- trol cable) and then is supplied to the control board.
The control board the regulates and disperses the var- ious supply voltages needed for machine operation.
TRIGGER CIRCUIT
When the gun trigger is closed, the control board is sig- naled to apply armature voltage to the drive motor and to activate any auxiliary circuits that may be incorpo- rated within the
Trigger interlock is used for long welds. When an arc is established the trigger can be released. To stop welding, the gun trigger is pulled again, and when it is released the second time, the welding power source output turns off and the wire speed stops.
Return to Section TOC
Return to Master TOC
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion
