Lincoln Electric IM10053 RANGER 305 D (AU) - Manual (Page 15)

1. Shut the welder off.
2. 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 elec-
trode cable from the LN-25 to the "-" terminal of
the welder and work cable to the "+" terminal of
the welder.
3. 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 control lead to supply current to the wire
feeder motor; it does not carry welding current.
4. Set the MODE switch to the "CV-WIRE " position.
5. Set the "WELD TERMINALS" switch to "WELD
TERMINALS ON"
6. Set the "ARC CONTROL" knob to "0" initially and
adjust to suit.
7. Set the "IDLE" switch to the "AUTO" position.
When not welding, the Ranger® 305D (AU)
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.
8. When the gun trigger is closed, the current sens-
ing circuit will cause the Ranger® 305D (AU)
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.
If you are using an LN-25 without an internal con-
tactor, the electrode will be energized when the
Ranger® 305D (AU) is started.
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Connection of LN-742, Spool Gun (K487-25) and
Cobramatic to Ranger® 305D (AU)
• Shut the welder off.
• Connect per instructions on the appropriate connec-
tion diagram in Section F.
CAUTION
A-8 INSTALLATION
RANGER® 305D (AU)
A-8
CONNECTION OF LINCOLN ELECTRIC
WIRE FEEDERS
Connection of LN-15 to the Ranger® 305D (AU)
These connections instructions apply to both the LN-
15 Across The-Arc and Control Cable models. The
LN-15 has an internal contactor and the electrode is
not energized until the gun trigger is closed. When the
gun trigger is closed the wire will begin to feed and the
welding process is started.
• Shut the welder off.
• For electrode Positive, connect the electrode cable
to the "+" terminal of the welder and work cable to
the "-" terminal of the welder. For electrode
Negative, connect the electrode cable "-" terminal of
the welder and work cable to the "+" terminal of the
welder.
• Across The-Arc Model:
Attach the single lead from the front of the LN-15 to
work using the spring clip at the end of the lead. This
is a control lead to supply current to the wire feeder
motor; it does not carry welding current.
Set the "WELD TERMINALS" switch to "WELD TER-
MINALS ON"
• Control Cable Model:
Connect Control Cable between Engine Welder and
Feeder.
Set the "WELD TERMINALS" switch to "REMOTELY
CONTROLLED".
• Set the MODE switch to the "CV-WIRE " position.
• Set the "WIRE FEEDER VOLTMETER" switch to
either "+" or "-" as required by the electrode polarity
being used.
• Set the "ARC CONTROL" knob to "0" initially and
adjust to suit.
• Set the "IDLE" switch to the "AUTO" position.
Connection of the LN-25 to the Ranger® 305D (AU)
Shut off welder before making any electrical con-
nections.
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The LN-25 with or without an internal contactor may
be used with the Ranger® 305D (AU). See the appro-
priate connection diagram in Section F.
WARNING