Owner`s manual

OM-2226 Page 28
4-5. Lift-Arc And HF TIG Start Procedures
Lift-Arc Start
When Lift-Arct button light is On,
start arc as follows:
1 TIG Electrode
2 Workpiece
Touch tungsten electrode to work-
piece at weld start point, enable out-
put with torch trigger, foot control, or
hand control. Hold electrode to
workpiece for 1-2 seconds, and
slowly lift electrode. Shielding gas
begins to flow when electrode
touches workpiece and 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 with-
out overheating, sticking, or getting
contaminated.
Application:
Lift-Arc is used for the DCEN
GTAW process when HF Start
method is not permitted, or to re-
place 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