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THEORY OF OPERATION | ||
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to Section TOC | to Master TOC |
| WIRE DRIVE MOTOR AND FEEDBACK | ||||
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Return | Return |
| WIRE | GAS |
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| SPEED | SOLENOID |
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| WIRE | ||
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| DRIVE |
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| ARC |
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| MOTOR |
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| VOLTAGE |
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| CONTROL BOARD |
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| TACH |
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| GUN TRIGGER AND THUMB SWITCH | |
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| TRANSFORMER |
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| SWITCH | I |
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| FEEDBACK | |
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TOC |
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| RECONNECT |
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| POSITIVE | ||
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Section | Master |
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Return | Return |
| RECTIFIER | T | A |
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| FAN |
| R | K | NEGATIVE | ||
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| MOTORS |
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| TERMINAL | |||
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| SHUNT |
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Figure E.5 - Wire Drive Motor and Feedback.
TOC | TOC | WIRE DRIVE MOTOR AND | ||
Section | Master | |||
FEEDBACK | ||||
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to | to | The wire drive motor is controlled by the control board. | ||
A motor speed feedback signal is generated at the | ||||
Return | Return | |||
motor tach and sent to the control board. The control | ||||
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| board compares this feedback signal with the com- | ||
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| mands set forth by the Wire Speed Control poten- | ||
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| tiometer and sends the appropriate armature voltage | ||
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| to the wire drive motor. The drive motor speed is thus | ||
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| controlled which in turn regulates the electrode wire | ||
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| feed speed through the gun. | ||
Section TOC | Master TOC |
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| NOTE: Unshaded areas of Block Logic | |
| Diagram are the subject of discussion | |||
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