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OM-356 Page 23
4-6. Start Mode
1 Start Mode
For SMAW welding, press button to toggle
LED to Off position.
For GTAW welding, use control to select Off
for no HF, Lift-Arct, HF for arc starting only,
or continuous HF. See Section 4-13 for ad-
justing high frequency intensity.
Application:
When Off is selected, use the scratch meth-
od to start an arc for both the SMAW and
GTAW processes.
When Lift-Arc is selected, start arc as
follows:
2 TIG Electrode
3 Workpiece
Touch tungsten electrode to workpiece at
weld start point, enable output with torch
trigger, foot control, or hand control. Hold
electrode to workpiece for 1-2 seconds,
and slowly lift electrode. An arc will form
when electrode is lifted.
Shielding gas begins to flow when elec-
trode touches work piece.
Normal open-circuit voltage is not present
before tungsten electrode touches work-
piece; only a low sensing voltage is present
between electrode and workpiece. The sol-
id 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 GTAW pro-
cess when HF Start method is not per-
mitted.
When HF Start is selected, 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 when the DCEN GTAW
process is required.
When HF Continuous is selected, start
arc as follows:
High frequency turns on when output is en-
ergized and remains on for duration of weld.
Application:
HF Continuous is used when the AC GTAW
process is required.
NOTE: Lit LED indicates selected mode.
When Output Selector switch position
changes, LED may change position, based
upon last selection.
NOTE: Some start methods may not be
available for all processes.
1
2
1 – 2
Seconds
“Touch”
Do NOT Strike Like A Match!
3
Lift-Arct Start Method
1
(CE Nameplate Only)