Lift-Arc Tig Procedure; Stick Start Procedure - Miller XMT 350 VS Auto-Line Owner's Manual

5-4. Lift-Arc TIG Procedure

5-5.

Stick Start Procedure

1
1 − 2
"Touch"
Seconds
Do NOT Strike Like A Match!
1
2
2
3
With Process Switch in the Lift-Arc
TIG position, start an arc as follows:
1 TIG Electrode
2 Workpiece
Touch tungsten electrode to work-
piece at weld start point, hold
electrode to workpiece for 1-2
seconds, and slowly lift electrode.
An arc will form 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.
Ref. S-156 279
With Stick selected, start arc as fol-
lows:
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.
OM-225 604 Page 19