OM-236 891 Page 73
Flux Core
Process
Wire Size
in. (mm)
Rolling Pipe/In Position
Wire Feed Speed
IPM (mpm)
Voltage
Shielding Gas
Flux Core/GMAW
Not
Dependent
50-780 w/250 Nominal
(1.3-19.8 w/6.4 Nominal)*
24.5-32 w/25.0 Nominal
Not Dependent
Note: Arc Length
−
Length of arc from end of wire to weld puddle. Wire feed speed and voltage are synergic for the
RMD and ProPulse processes. This means when adjusting wire feed speed, the voltage is automatically adjusted so
it is not necessary to adjust the Arc Length.
*See wire manufacturer for recommended wire feed speed and gas mixture.
6-15. Lift-Arc
And HF TIG Start Procedures
Lift-Arc Start
When Lift-Arc
t
button light is On,
start arc as follows:
1
TIG Electrode
2
Workpiece
Touch tungsten electrode to
workpiece at weld start point,
enable output and shielding gas
with torch trigger, foot control, or
hand control (if a remote control is
connected).
Hold electrode to
workpiece for 1-2 seconds
, and
slowly lift electrode. Arc is formed
when electrode is lifted.
Normal open-circuit voltage is not
present before tungsten electrode
touches workpiece; only a low
sensing voltage is present between
electrode and workpiece. The
solid-state output contactor does
not energize until after electrode is
touching workpiece. This allows
electrode to touch workpiece
without overheating, sticking, or
getting contaminated.
Application:
Lift-Arc is used for the DCEN or
process when HF Start method is
not permitted, or to replace the
scratch method.
HF Start
When HF Start button light is On,
start arc as follows:
High frequency turns on to help
start arc when output is enabled.
High frequency turns off when arc is
started, and turns on whenever arc
is broken to help restart arc.
Application:
HF start is used for the DCEN
GTAW process when a non-con-
tact arc starting method is required.
1
1
−
2
Seconds
“Touch”
Do NOT Strike Like A Match!
2
Lift-Arc Start Method
