Lincoln Electric Commander 500 Cummins, Operator'S Manual

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A-8
INSTALLATION
COMMANDER 500 CUMMINS
A-8
CONNECTION OF LINCOLN
ELECTRIC WIRE FEEDERS
Shut off welder before making any electrical con-
nections.
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CONNECTION OF THE LN-25 TO THE COM-
MANDER 500 CUMMINS
The LN-25 with or without an external contactor may
be used with the COMMANDER 500 CUMMINS. See
the appropriate connection diagram in the DIAGRAMS
section.
NOTE: The LN-25 (K431) Remote Control Module and
(K432) Remote Cable are not recommended for use
with the COMMANDER 500 CUMMINS.
• Shut the welder off.
• For electrode Positive, connect the electrode cable
from the LN-25 to the “ + ” terminal of the welder and
work cable to the “ - ” terminal of the welder. For elec-
trode Negative, connect the electrode cable from the
LN-25 to the
“ - ” terminal of the welder and work cable
to the “ + ” terminal of the welder.
• Attach the single lead from the front of the LN-25 to
work using the spring clip at the end of the lead. This
is a sense lead to supply current to the wire feeder
motor; it does not carry welding current.
• Set the SELECTOR switch to the “ CV-WIRE ” posi-
tion.
• Set the “ WELDING TERMINALS ” switch to “ WELD
TERMINALS ON ”
• Adjust the “ ARC CONTROL ” knob to desired crisp-
ness. Generally, welding is best if the “ ARC CON-
TROL ” is set to SOFT for MIG and CRISP for
INNERSHIELD. You may however, want to start in
the middle and adjust (as needed) from there.
• Set the “ IDLE ” switch to the “ AUTO ” position. When
not welding, the COMMANDER 500 CUMMINS
engine will be at the low idle speed. If you are using
an LN-25 with an internal contactor, the electrode is
not energized until the gun trigger is closed.
If you are using an LN-25 without an internal con-
tactor, the electrode will be energized when the
COMMANDER 500 CUMMINS is started.
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h. When the gun trigger is closed, the current sensing
circuit will cause the COMMANDER 500 CUMMINS
engine to go to the high idle speed, the wire will
begin to feed and the welding process started.
When welding is stopped, the engine will revert to
low idle speed after approximately 12 seconds
unless welding is resumed.
CONNECTION OF LN-7 OR LN-8 TO THE
COMMANDER 500 CUMMINS
• Shut the welder off.
• Connect the LN-7 or LN-8 per instructions on the
appropriate connection diagram in the DIAGRAMS
section.
• Set the “ WIRE FEEDER VOLTMETER ” switch to
either “ + ” or “ - ” as required by the electrode being
used.
• Set the “ SELECTOR ” switch to the “ CV-WIRE ” posi-
tion.
• Adjust the “ ARC CONTROL ” knob to desired
Crispness. SOFT for MIG and CRISP for
INNERSHIELD.
• Set the “ WELDING TERMINALS ” switch to the
“ REMOTELY CONTROLLED ” position.
• Set the “ IDLE ” switch to the “ HIGH ” position. When
not welding, the COMMANDER 500 CUMMINS
engine will be at the low idle speed.
WARNING
CAUTION