b-4
OPERATION
b-43. 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.
The 83% wire feed speed reduces the wire feed
speed to 83% of the original set value when activated.
For example, if the original wfs = 200 in/min, the feed-
er will regulate to 0.83 x 200 = 166 in/min.
The 83% trigger requires a gun with a dual procedure
switch.
This feature is often useful when welding pipe, and a
“cooler” procedure is required on the bottom portion.
4. 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 weld-
ed.
5. SET-uP PuShbuTTON
before entering the set-up menu:
Calibration of Wire Feed Speed:
• Set the display to the desired wire feed speed
(example: 400 inches per minute)
• Measure the actual wire feed speed (example:
405 inches per minute)
• Place the WFS knob in the 12 o’clock position.
To enter the set-up menu, use paper clip to press the
small button located on the case front.
WIRE FEED SPEED uNITS
To change the wire feed speed units:
Rotate the WFS knob to the left to use “inches/minute”
for the wire feed speed units.
Rotate the WFS knob to the right to use
“meters/minute” for the wire feed speed units.
Then rotate the WFS knob to the 12 o’clock position.
Press the set-up button again to enter WFS calibration.
WFS CALIbRATION
Measurements for adjusting the WFS calibration must
be made before entering the set-up menu. If no
changes are being made to the calibration, then press
the set-up button to enter WFS Knob Range.
While in the set-up menu, adjust the calibration factor in
the following example:
Actual WFS 405
Set WFS 400
Press the set-up button when calibration factor is set.
RED-D-ARC LN-25™ PRO EXTREME
A
E
CB
D
A
E
CB
D
Pin
A
B
C
D
E
Wiring
5 volt supply
Not used
Trigger
83% WFS switch
5 volt supply
Function
5-pin trigger
connector for
push-guns
only.
PUSHBUTTON
PUSHBUTTON
USEUro
US EUro
= Caibration Factor Example: = 1.01