Process Selection; Lift-Arc And Tig Impulse Start Procedures - Miller Maxstar 150 STH Auto-Line Manual Del Operador

4-2. Process Selection

1 Process Selector Switch Pad
Use control to select required welding pro-
cess. Press switch pad until light (LED) for
desired process is illuminated.
2 TIG Impulse Start
When selected, an impulse HF arc starting
method is activated (see Section 4-3).
3 TIG Pulse With TIG Impulse Start
When selected, the TIG pulse welding pro-
cess with impulse HF start is activated.
Pulsing is the alternating raising and lower-
ing of the weld output at a specific rate. To
change pulse frequency, see Section 4-4.
4 TIG Pulse With Lift-Arct Start
When selected, the TIG pulse welding pro-
cess with Lift-Arc start is activated (see
Section 4-3).

4-3. Lift-Arc And TIG Impulse Start Procedures

1 2
.
Pictorials show Lift-Arc start method − do not
use this method for TIG Impulse starts.
OM-2242 Page 10
=Light Off
2
1
Press & Release
5 Lift-Arc Start
When selected, a TIG arc starting method
in which the electrode must come in contact
with the workpiece to initiate an arc is acti-
vated (see Section 4-3).
1 − 2
"Touch"
Seconds
Do NOT Strike Like A Match!
=Light On =Light Flashing
3
4
Press & Release Press & Release
5
6
Press & Release Press & Release
6 Stick (SMAW)
When selected, Adaptive Hot Start and
DIG circuitry are energized.
Lift-Arc Start
1 TIG Electrode
2 Workpiece
Touch tungsten electrode to work-
piece, hold for 1-2 seconds, slowly
lift electrode, and an arc forms.
Open-circuit voltage maybe present
before electrode touches workpiece.
TIG Impulse
High frequency starts arc when output
is enabled without making contact with
the workpiece. High frequency turns
off when arc is started.