OM-263 657 Page 30
6-3. Lift-Arc TIG Procedure
With Process Switch in the TIG
position, start an arc as follows:
1 TIG Electrode
2 Workpiece
Touch tungsten electrode to work-
piece at weld start point. Arc will not
start while electrode is touching the
workpiece. Slowly lift electrode to
form an arc.
. Do not re-touch the electrode to
the workpiece. The arc will go
out and the electrode will stick.
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.
. If FieldPro Remote is
connected, its display may
temporarily turn off when the
tungsten touches the work-
piece.
1
1
Second
“Touch”
Do NOT Strike Like A Match!
2
Ref. S-156 279
6-4. Stick Start Procedure − Scratch Start Technique
With Stick selected, start arc as
follows:
1 Electrode
2 Workpiece
3 Arc
Drag electrode across workpiece like
striking a match; lift electrode slightly
after touching work. If arc goes out
electrode was lifted to high. If
electrode sticks to workpiece, use a
quick twist to free it.
1
2
3
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