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STEALTH DIGI-TIG 320 AC/DC PULSE
3 MMA operation
If the electrode touches the workpiece over 2S, the welding current will drop auto-
matically to 0 to protect the electrode.
4 TIG operation
If the TIG torch switch is pressed quickly the welding current will drop by 50%.
If the TIG torch switch is pressed quickly again, the full welding current will return.
Notes
• First check the condition of welding and connection units for any malfunction,
such as ignition spark / gas leakage / out of control etc.
• Check whether there is enough Argon gas in the shield gas cylinder. The electro-
magnetic gas valve can be tested via the switch on the front panel.
• Do not point the torch at hand or body. When the torch switch is pressed, the arc is
ignited with a high-frequency, high-voltage spark. The ignition spark can cause
interference in equipment.
• The flow rate is set according to the welding power used. Turn the regulation screw
to adjust the gas flow shown on the gas hose pressure meter or the gas bottle
pressure meter.
• The spark ignition is most efficient if you keep a 3mm distance from the workpiece
to the tungsten electrode during the ignition.
Note: When selecting AC output, the current and the wave form are as same as the
above, but output polarity changes alternately.
4.6 Welding Parameters
4.6.1 Joint forms in TIG/MMA
INSTALLATION AND ADJUSTMENT
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§4.4 Welding Parameters
§4.4.1 Joint forms in TIG/MMA
§4.4.2 The explanation of welding quality
The relation of welding area color & protect effect of stainless steel
Welding area
color
argent , golden
blue
red-grey
grey
black
Protect effect
best
better
good
bad
worst
The relation of welding area color & protect effect of Ti-alloy
Welding area
color
bright argent
orange-yellow blue-purple caesious
white powder of
titanium oxid
Protect effect
best
better
good
bad
worst
§4.4.3 TIG Parameters Matching
The corresponding relationship between gas nozzle diameter and electrode diameter
Gas nozzle diameter/mm
Electrode diameter/mm
6.4
0.5
8
1.0
9.5
1.6 or 2.4
11.1
3.2
Notice: the above parameters originate from
《
Welding Dictionary
》
P142, Volume 1 of
Edition 2.
a
butt joint
b
lap joint
c
coner joint
d T
joint
a) butt joint
b) lap joint
c) corner joint
d) T joint
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