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TROUBLESHOOTING & REPAIR
F-75 F-75
COMMANDER 400
This is the typical DC output voltage
generated from a properly operating
machine. Note that each vertical
division represents 20 volts and that
each horizontal division represents 5
milliseconds in time.
The machine was loaded with a
resistance grid bank to 400 amps at
40 volts.
Note: Scope probes connected at
“WIRE” welding output terminals.
SCOPE SETTINGS
Volts/Div.....................20V/Div.
Horizontal Sweep.....5 ms/Div.
Coupling.............................DC
Trigger.........................Internal
NORMAL WELD VOLTAGE WAVEFORM (WIRE CV)
MACHINE LOADED TO 400AMPS AT 40 VOLTS
0 volts