Lincoln Electric IM10080 RED-D-ARC LN-25 PRO EXTREME DUAL POWER - Manual (Page 30)

B-10 OPERATION B-10
RED-D-ARC LN25™ PRO EXTREME DUAL POWER
INTERNAL CONTROLS DESCRIPTION
(See Figure B.4)
1. 2 STEP - TRIGGER
INTERLOCK SWITCH
The 2 Step - Trigger Interlock
switch changes the function of the
gun trigger. 2 Step trigger opera-
tion turns welding on and off in
direct response to the trigger.
Trigger Interlock operation allows
welding to continue when the trig-
ger is released for comfort on long welds.
Place the toggle switch in the DOWN position for 2
Step operation or in the UP position for Trigger
Interlock operation.
2 Step Trigger
2 Step trigger operation is the most common. When
the gun trigger is pulled, the welding power source
energizes the electrode output and the wire feeder
feeds wire for welding. The power source and wire
feeder continue welding until the trigger is released.
Trigger Interlock
Trigger Interlock operation provides for operator com-
fort when making long welds. When the gun trigger is
first pulled, the welding power source energizes the
output and the wire feeder feeds wire for welding.
The gun trigger is then released while the weld is
made. To stop welding, the gun trigger is pulled
again, and when it is released the welding power
source output turns off and the wire feeder stops feed-
ing wire.
2. CV/CC SWITCH
The CV/CC switch sets the wire
feed speed control method for the
wire feeder.
In the CV position, the wire feed
speed remains constant during
welding. A steady arc voltage is
regulated by the power source by
adjusting the arc current.
In the CC position, the wire feed
speed varies during welding. The
arc length is maintained by chang-
ing the wire feed speed.
3. PRESSURE ARM
(See Installation Section)
4. OPTIONAL TIMER KIT
The optional Timer Kit provides control of preflow
time, burnback, and postflow time.
5. SPOOL RETAINER
To release the spool retainer, squeeze the metal bar
inwards. When securing the spool, verify the spool
retainer is fully seated in place in one of the three
grooves of the spindle.
6. SPOOL BRAKE
Adjust the spool brake to provide enough friction to
stop wire overrun. Excessive brake force may cause
motor thermal overloads or welding problems.
7. GUN BUSHING, THUMB SCREW AND
SOCKET HEAD CAP SCREW
(For Code 11750)
(SEE INSTALLATION SECTION)
7a. GUN BUSHING, THUMB SCREW AND
SET SCREW
(For Code 12164)
(SEE INSTALLATION SECTION)
8. DRIVE ROLLS AND WIRE GUIDES
(See Installation Section)
9. COLD FEED PUSHBUTTON
When cold feeding, the wire drive
will feed electrode but neither the
power source nor the gas solenoid
will be energized. Adjust the
speed of cold feeding by rotating
the WFS knob. Cold feeding, or
"cold inching" the electrode is use-
ful for threading the electrode
through the gun.
CV
CC