Return to Section TOC
Return to Section TOC
Return to Section TOC
Return to Section TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
TROUBLESHOOTING & REPAIR
TYPICAL SCR GATE VOLTAGE WAVEFORM
CONSTANT VOLTAGE MIG
MAXIMUM OUTPUT SETTING – NO LOAD
0 volts
2 volts | 5 ms |
This is the typical DC open circuit voltage wave- form. The machine was in an open circuit con- dition (no load) and operating properly. Note that each vertical division represents 2 volts and that each horizontal division represents 5 milli- seconds in time.
Note: Scope probes connected at SCR gate
and cathode: (+) probe to gate,
SCOPE SETTINGS
Volts/Div | 2V/Div. |
Horizontal Sweep | 5 ms/Div. |
Coupling | DC |
Trigger | Internal |
|
|
