Stealth 9012H, Operator'S Manual

Page: 20 / 32

STEALTH DIGI-TIG 320 AC/DC PULSE
20
4.5.2 TIG welding (2T operation)
This function, without the adjustment of start current and crater current, is
suitable for re-tack welding, transient welding, thin plate welding etc.
MAINTENANCE AND TROUBLESHOOTING
21
l
t6
～
t7
：
Post-gas time can be set by the post-gas time adjustment knob on the front panel
（
0
～
10S
）
;
l
t7
：
Electromagnetic valve is closed and stop argon flowing. Welding is finished.
§4.5.2 TIG welding (2T operation)
This function without the adjustment of start current and crater current is suitable for the
Re-tack welding
、
transient welding
、
thin plate welding and so on.
t
（
s
）
0
I
（
A
）
Loosen the
welding gun
switch
Press and hold the welding
gun switch
t1 t4 t5
Arc is
ignited
Arc is
turned off
t2 t3
Welding current Is
The setting base
current Ib
Introduction
：
l
0: Press the gun switch and hold it. Electromagnetic gas valve is turned on. The shielding
gas stars to flow.
l
0
～
t1: Pre-gas time (0~2S)
l
t1
～
t2: Arc is ignited and the output current rises to the setting welding current (Iw or Ib) from
the min welding current.
l
t2
～
t3: During the whole welding process, the gun switch is pressed and held without
releasing.
Note: Select the pulsed output, the base current and welding current will be outputted alternately;
otherwise, output the setting value of welding current;
l
t3: Release the gun switch, the welding current will drop in accordance with the selected
down-slope time.
l
t3
～
t4: The current drops to the minimum welding current from the setting current (Iw or Ib),
and then arc is turned off.
l
t4
～
t5: Post-gas time, after the arc is turned off. You can adjust it (0~10S) through turnning
the knob on the front panel.
Introduction
• 0 Press and hold the gun switch – electromagnetic gas valve is turned on.
The shielding gas starts to flow.
• 0~t1 Pre gas time: 0~2S.
• t1~t2 Arc is ignited and the output current rises to the setting welding current
(Iw or Ib) from the minimum welding current.
• t2~t3 During the whole welding process, the gun switch is pressed and held
without releasing.
Note: Select the pulsed output – the base current and welding current will be
output alternately; otherwise output the setting value of welding current.
•
t3
Release the gun switch – welding current will drop in accordance with the
selected down-slope time.
•
t3~t4 The current drops to the minimum welding current from the setting current
(Iw or Ib) and arc is turned off.
• t4~t5 Post-gas time – after the arc is turned off you can adjust it (0~10S) by
turning the knob on the front panel.
• t5 Electromagnetic valve is closed – shield gas stops flowing and welding is
complete.
Short circuit protection function
1 TIG/DC/LIFT If the tungesten electrode touches the workpiece when welding, the
current will drop to 20A which can greatly reduce the tungsten spoilage,
prolong the life of the tungsten electrode and prevent tungsten clipping.
2 TIG/DC/HF If the tungesten electrode touches the workpiece when welding, the
current will drop to 0 within 1S which can greatly reduce the tungsten
spoilage, prolong the life of the tungsten electrode and prevent tungsten
clipping.