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Maximum WFS
Standard Spin
Gearing
280
340
440
520
600
Minimum Arc Volts
15 V
17 V
21 V
24 V
27 V
WIRE FEED SPEED KNOB
Wire Feed Speed, CV Operation
When Across the Arc models are operated with CV
power sources, the wire feed speed will remain a con-
stant value, independent of arc voltage changes, as
along as the arc voltage does not drop below the val-
ues per the following table.
83% Wire Feed Speed
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.
B-3
OPERATION
B-3
(See Customer Assistance Policy in the front of this
Instruction Manual)
CASE FRONT CONTROLS (See Figure B.1)
ITEM DESCRIPTION
1 Wire Feed Speed/Amperage Display
2 Wire Feed Speed LED
3 Amperage LED
4 Wire Feed Speed Knob
5 5 pin gun trigger connector
6 Work Clip Connection
7 Thermal LED
8 Voltage Display
9 Voltage LED
10 Set-up Push Button
LN-25™ IRONWORKER
1
5
2
6
7
8
9
10
3
4
FIGURE B.1
CV OPERATION