Controls And Settings - Lincoln Electric IDEALARC SVM 122-A Service Manual

B-4

CONTROLS AND SETTINGS

All operator controls and settings are located on the
case front assembly. See Figure B.1 for their loca-
tions.
1. Power Source Pilot Light
2. ON/OFF Power Toggle Switch
3. Output Control Potentiometer
4. Output Control Switch (with Local or Remote positions)
5. Output Terminals Switch (with On or Remote positions)
6. Arc Force Selector (for CC stick or TIG processes only)
7. Auxiliary Power Connections for Wire Feeder and Other
Equipment (115V and 42V)
1. POWER SOURCE PILOT LIGHT: This light indi-
cates that the power source input contactor is
energized (closed). This also means that the main
power transformer and all auxiliary control trans-
formers are energized.
2. ON/OFF POWER TOGGLE SWITCH: Energizes
or de-engergizes the input contactor which is pow-
ered by the 115 volt auxiliary transformer. The
switch turns the machine ON or OFF. Position "I"
is ON; position "0" is OFF.
3. OUTPUT CONTROL POTENTIOMETER:
trols voltage in CV mode and current in CC mode.
4. OUTPUT CONTROL SWITCH (WITH LOCAL OR
REMOTE POSITIONS): Selects the mode of con-
trol. In the "Local" position, control is by the
machine control panel. In the "Remote" position,
control is by either a wire feeder unit or through an
optional remote control device.
OPERATION
FIGURE B.1 – CASE FRONT CONTROLS
8. Mode Switch
9. Arc Control
10. Thermal Protection Indicator Light
11. DC Ammeter
12. DC Voltmeter
13. Voltmeter "+" Electrode or "-" Electrode Switch
5. OUTPUT TERMINALS "ON" OR "REMOTE"
6. ARC FORCE SELECTOR: Allows you to select
Con-
IDEALARC DC-400
LINCOLN
®
ELECTRIC
SWITCH: When in the "Remote" position, leads
#2 and #4 have to be jumpered externally to ener-
gize the output terminals. When in the "ON" posi-
tion, this switch internally jumpers leads #2 and #4,
which energizes the output terminals.
the ideal arc force according to the procedure and
electrode being used for CC stick or TIG welding.
It controls the amount of current added to the
welding current when the electrode shorts to the
work. At minimum setting, no extra short circuit
current is added. The arc will be softer and have
less spatter but may be more prone to sticking. At
maximum setting, the arc will be more forceful and
less prone to sticking but will produce more spat-
ter.
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