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TROUBLESHOOTING & REPAIR
TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED
CONSTANT VOLTAGE MIG MODE
0 volts
20 volts | 2 ms |
This is the typical DC open circuit voltage wave- form generated from a properly operating machine. Note that each vertical division repre- sents 20 volts and that each horizontal division represents 2 milliseconds in time. The machine was loaded with a resistance grid bank. The grid bank meters read 650 amps at 44 VDC.
Note: Scope probes connected at machine out-
put terminals: (+) probe to positive terminal,
SCOPE SETTINGS
Volts/Div | 20V/Div. |
Horizontal Sweep | 2 ms/Div. |
Coupling | DC |
Trigger | Internal |
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