English
English
15
4. 5-Pin gun trigger connector
There is one circular connector for the gun trigger on the
front of the LN-25™ PRO. Note – if the gun trigger is
already depressed when the feeder is powered up, the
feeder will not activate. Release and then press the gun
trigger to begin welding.
Function Pin
Wiring
5-pin trigger
connector for
push-guns
only.
A 5
volt
supply
B Not
used
C Trigger
D Not
used
E Not
used
5. Work sense lead
Always turn power off at the welding power source
before moving the work sense lead.
The work sense lead attaches to the item being welded.
6. Thermal led, motor overload
The thermal light illuminates when the wire
drive motor draws too much current. If the
thermal light illuminates, the wire drive will
automatically shutdown for up to 30
seconds to allow the motor to cool. To start
welding again, release the gun trigger,
inspect the gun cable, liner (and conduit). Clean and
make repairs as necessary. Start welding again when
the problem has been safely resolved.
For best results, keep the gun cable and conduit as
straight as possible. Perform regular maintenance and
cleaning on the gun liner, conduit and gun. Always use
quality electrode, such as L-50 or L-56 from Lincoln
Electric.
7. Polarity LED
The Polari ty LED lights when the wire feeder is
connected for positive polarity. Use the polari ty LED to
verify if the wire feeder is connected for the proper
polarity.
+ POLARITY
POLARDAD
- POLARITÉ
Internal controls
A. 2 STEP TRIGGER INTERLOCK SWITCH
B. CV / CC SWITCH
C. PRESSURE ADJUSTMENT ARM
D. OPTIONAL TIMER KIT
E. SPOOL RETAINER
F. SPINDLE BRAKE
G. GUN BUSHING, THUMB SCREW AND SOCKET
HEAD CAP SCREW
H. DRIVE HUBS
I. COLD
FEED
PUSHBUTTON
Figure 12
Internal controls description
(See Figure 12)
1. 2 Step - Trigger interlock switch
The 2 Step - Trigger Interlock switch
changes the function of the gun trigger.
2 Step trigger operation turns welding
on and off in direct response to the
trigger. Trigger Interlock operation
allows welding to continue when the
trigger 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 comfort
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 feeding wire.
A
B
C
D
E
F
G
H
I
