Abnormal output weld voltage waveform, Troubleshooting & repair – Lincoln Electric IDEALARC CV-300 User Manual
Page 64
F-25
TROUBLESHOOTING & REPAIR
F-25
IDEALARC CV-300
5ms
20V
0 Volts
CH1
This is NOT the typical output voltage wave-
form. Note the increased “ripple” in the out-
put waveform. The output capacitors were
disconnected to simulate a faulty capacitor
bank. Note that each vertical division repre-
sents 20 volts and each horizontal division
represents 5 milliseconds in time.
Note: Scope probes connected at machine
high inductance output terminals.
Volts/Div . . . . . . . . . . . . . . . . .20 V/Div.
Horizontal Sweep . . . . . . . . . .5 ms/Div.
Coupling . . . . . . . . . . . . . . . . . . . . .DC.
Trigger . . . . . . . . . . . . . . . . . . .Internal.
SCOPE SETTINGS
MACHINE LOADED TO 300 AMPS AT 32 VDC
ABNORMAL OUTPUT WELD VOLTAGE WAVEFORM - MACHINE LOADED
CAPACITOR BANK NOT FUNCTIONING