English
English
13
CV OPERATION
Minimum Arc
Volts
Maximum WFS
(Standard
Torque)
Maximum WFS
(Extra Torque )
15 V
400
220
17 V
450
250
21 V
570
300
24 V
650
350
27 V
700
400
Wire Feed Speed, CC Operation
When Across the Arc models are operated with CC
power sources, the wire feed speed changes as the arc
voltage changes. When the arc voltage increases, the
wire feed speed will increase; and when the arc voltage
decreases, the wire feed speed will decrease.
To preset the wire feed speed on CC power sources:
1. Set the Wire Feed Mode switch inside the LN-25™
Pro to "CC".
2. Refer to the Figure 10 graph for the setting for the
wire feed speed knob setting. Select the horizontal
line representing the Desired Wire Feed Speed. (See
Figure 10 arrow for 375 in/min.)
3. Select the diagonal line representing the Arc Volts.
(See Figure 10 for 29 volts.)
4. Determine the vertical line representing the CC
representing the CC Wire Feed Speed setting where
the above two lines cross. (See Figure 10 arrow line
for 450.) Set the LN-25™ Pro wire feed speed knob
to this value.
CC WFS dial setting =
desiredWFSx35
Arc
Volts
Example:
= 375in/min.(HorizontalLine)x35
29 Arc Volts (Diagonal Line)
= 452.5
(Vertical
Line)
Use 450
setting
(See Figure 10)
A constant voltage (CV) power
source is recommended for
fluxcored arc welding. (FCAW) and
gas metal arc welding (GMAW) to
obtain code qual i ty resul ts.
However, this wire feeder may also
be used with a constant current (CC)
power source to obtain passable
results for noncritical quality
applications.
Figure 10
