Lincoln Electric IM644 Commander 500 - Manual (Page 16)

A-8 INSTALLATION
COMMANDER 500
A-8
CONNECTION OF LINCOLN
ELECTRIC WIRE FEEDERS
Shut off welder before making any electrical connec-
tions.
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CONNECTION OF THE LN-25 TO THE
COMMANDER 500
The LN-25 with or without an external contactor may
be used with the Commander 500. See the appropri-
ate 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.
a. Shut the welder off.
b. 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
electrode Negative, connect the electrode cable
from the LN-25 to the
“ - ” terminal of the welder and
work cable to the “ + ” terminal of the welder.
c. 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.
d. Set the SELECTOR switch to the “ WIRE WELD-
ING ” position.
e. Set the “ WELDING TERMINALS ” switch to “ WELD-
ING TERMINALS ALWAYS ON ”
f. 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.
g. Set the “ IDLE ” switch to the “ AUTO ” position. When
not welding, the Commander 500 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 contactor,
the electrode will be energized when the Commander
500 is started.
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h. When the gun trigger is closed, the current sensing
circuit will cause the Commander 500 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
a. Shut the welder off.
b. Connect the LN-7 or LN-8 per instructions on the
appropriate connection diagram in the DIAGRAMS
section.
c. Set the “ LOCAL /REMOTE ” switch to “ REMOTE ” for
the LN-8 or LN-7 with a K857 (or K857-1) remote
voltage control cable attached;
“ LOCAL ” for LN-7
with no remote voltage control.
d. Set the “ WIRE FEEDER VOLTMETER ” switch to
either “ + ” or “ - ” as required by the electrode being
used.
e. Set the “ SELECTOR ” switch to the “ WIRE WELD-
ING ” position.
f. Adjust the “ ARC CONTROL ” knob to desired
Crispness. SOFT for MIG and CRISP for
Innershield.
g. Set the “ WELDING TERMINALS ” switch to the
“ WELDING TERMINALS ” REMOTELY CON-
TROLLED ” position.
h. Set the “ IDLE ” switch to the “ HIGH ” position. When
not welding, the Commander 500 engine will be at
the low idle speed.
WARNING
CAUTION