Mode Switch Settings; Lift-Arc Tig Procedure - Miller ALT 304 Mode D'emploi

4-2. Mode Switch Settings

NOTE
Mode Switch Setting
Scratch Start TIG
Lift-Arc TIG
TIG
MIG
Pulsed MIG
CC
Stick
V-Sense Feeder

4-3. Lift-Arc TIG Procedure

The Stick and CC modes provide the Adaptive Hot Start feature, which
automatically increases the output amperage at the start of a weld should the start
require it. This eliminates electrode sticking at arc start.
Process
GTAW
GTAW – See Section 4-3
GTAW With HF Unit, Pulsing Device, Or Remote Control
GMAW
GMAW-P (Requires an external pulsing device.)
Stick (SMAW) With Remote On/Off
SMAW
MIG (GMAW) With Voltage Sensing Wire Feeder
1 – 2
"Touch"
Seconds
Do NOT Strike Like A Match!
1 2
Output On/Off Control
Electrode Hot
Electrode Hot
At Remote 14
At Remote 14
At Remote 14
At Remote 14
Electrode Hot
Electrode Hot
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
OM-2231 Page 17