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THEORY OF OPERATION | |
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| FIGURE E.2 - INPUT POWER CIRCUIT |
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| SPOOL | WIRE |
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| GAS | GUN | SPEED |
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| SOLENOID | SWITCH | CONTROL |
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| WIRE |
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| DRIVE |
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| MOTOR |
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| CIRCUIT | 115V |
| CONTROL BOARD |
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| BREAKER | RECEPTACLE |
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FAN |
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MOTOR |
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| TRANSFORMER | OUTPUT BRIDGE |
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| TACH | ||
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| V |
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| FEEDBACK | THERMOSTAT | THERMOSTAT |
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| CONTACTOR CONTROL |
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| .8 |
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LINE |
| 27 | AC | TAP SELECTOR | GUN TRIGGER |
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SWITCH |
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| SWITCH |
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| OUTPUT DIODE |
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| BRIDGE |
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| + | + |
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| OUTPUT | POSITIVE | |
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| CHOKE | ||
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| TERMINAL | ||
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| CONTACTOR | OUTPUT |
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| CAPACITORS |
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RECONNECT |
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| - | - |
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| MAIN |
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| NEGATIVE | ||
PANEL | TRANSFORMER |
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| TERMINAL | ||||
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INPUT LINE VOLTAGE, MAIN
TRANSFORMER, VOLTAGE
SELECTOR SWITCH AND BAFFLE
MOUNTED DIODE BRIDGE
The single phase input power is connected to the Power MIG® 215XT through a line switch located on the front panel.
A reconnect panel allows the user to configure the machine for the desired input voltage. The AC input voltage is applied to the primary of the main transformer. The cooling fan motor and 115v receptacle (115VAC) is powered from a portion of the secondary winding. For welding purposes, the main transformer converts the high voltage, low current input power to a low voltage, high current output. This tapped secondary winding is coupled to a voltage selector switch. By selecting one of seven positions on the switch the user can preset the desired voltage output from a minimum setting (A) to a maximum voltage setting (G).
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion
Power MIG® 215XT
GUN
ASSEMBLY
