Tig Lift-Arc Welding; Preparing Unit For Stick Welding - Miller XMS 403 Owner's Manual

4-16. TIG Lift-Arc Welding

4-17. Preparing Unit For Stick Welding

To select Stick welding process, proceed
as follows:
Follow safety precautions according to
Section 1.
Prepare unit according to Section 3.
Connect electrode holder to the Positive
power connector 2.
Connect work clamp cable to the negative
connector 3.
If a remote control is desired, connect it to
the Remote Control receptacle 4.
Turn unit On.
Allow time for unit to complete its start up
cycle.
Set Stick welding process using P3 push
button.
.
If D1 does not display STK proceed as
follows:
1
1 − 2
"Touch"
Seconds
Do NOT Strike Like A Match!
Press P2 setup button. D1 will display TIG.
Rotating E2 encoder changes process to
STK mode.
HOT START Setting
To change HOT START setting, proceed
as follows:
Press P2 to enter SET UP menu.
Use E1 to change D1 to HOT.
D2 value is default setting of 20% (range is
0% to 100%).
Use E2 to change D2 value.
This parameter increases output amper-
age at the start of a weld to eliminate elec-
trode sticking.
ARC FORCE Setting
To change ARC FORCE setting, proceed
as follows:
Press P2 to enter SET UP menu.
Use E1 to change D1 to ARC.
2
D2 value is default setting of 0% (range is
0% to 100%).
Use E2 to change D2 value.
When setting is increased, short-circuit
amperage at low arc voltage increases.
STUCK Setting
To change STUCK ON/OFF setting, pro-
ceed as follows:
Press P2 to enter SET UP menu.
Use E1 to change D1 to STUK.
D2 default setting is OFF
Use E2 to change D2 to ON.
This parameter prevents the wire from
sticking at the start of the weld
.
Lift-Arc Start
When process selector LED 4 is il-
luminated in TIG mode Lift-Arc TIG
is enabled.
1 TIG Electrode
2 Workpiece
Touch tungsten electrode to work-
piece at weld start point, enable out-
put and shielding gas with torch trig-
ger, foot control, or hand control.
Hold electrode to workpiece for
1-2 seconds, and slowly lift elec-
trode. Arc is formed 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.
Application:
Lift-Arc is used for the DCEN or AC
GTAW process when HF Start
method is not permitted, or to re-
place the scratch method.
Ref. S-156 279
STICK welding can be enabled (L20
ON) or disabled (L20 OFF) using P7
push button, and this status is retained
in the STICK welding process
memory.
OM-244 243 Page 27