Lincoln Electric IM919 Welding System User Manual


 
A-9
INSTALLATION
A-9
7. Set the "IDLE" switch to the "AUTO" position.
When not welding, the Ranger® 250 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® 250 engine to
go to the high idle speed, the wire will begin to
feed and the welding process started. When weld-
ing is stopped, the engine will revert to low idle
speed after approximately 12 seconds unless
welding is resumed.
Connection of LN-742, K487-25 Spool Gun, and
Cobramatic to Ranger® 250
1. Shut the welder off.
2. Connect per instructions on the appropriate con-
nection diagram in Section F.
RANGER® 250