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4.3.2 TIG Welding (2T operation)
TIG short welding (2T):
•
0: Press and hold the gun switch, Electromagnetic gas valve is turned on. The shielding gas starts to flow
• 0~t1: Pre flow time, adjustment range of pre flow time: 0.1~1.0S
• t1~t2: Striking success, the output current slopes up to the setting current from minimum current (10A)
• t2~t3: During the whole welding process, the gun switch is pressed and held without releasing
• t3: Loosen the gun switch, the output current slopes down
• t3~t4: The output current slopes down to minimum current (10A), stop arc; adjustment range of down slope time: 0~5S
• t4~t5: Post flow time, adjustment range of post flow time: 0.1~10.0S
• t5: Electromagnetic valve is closed and argon flowing stopped. Welding is finished
Introduction:
Short circuit protection function:
1. TIG /DC/LIFT
：
If the tungsten electrode touches the workpiece when welding, the current will drop to 30A, which can reduce
tungsten spoilage
，
prolonging the life of the tungsten electrode
，
and prevent tungsten clipping.
2. TIG /DC/HF
：
If the tungsten electrode touches the workpiece when welding, the current will drop to 0 within 1s, which can
reduce tungsten spoilage
，
prolonging the life of the tungsten electrode
，
and prevent tungsten clipping.
3. MMA
：
if the electrode touches the workpiece for over two seconds, the welding current will drop to the 0 automatically to
protect the electrode.
Prevent arc-break function
：
TIG operation
，
Avoid arc-break with special means, even if arc-break occurs the HF will keep the
arc stable.
4. TIG: If the TIG torch is pressed quickly, the welding current will drop by half, then if the TIG torch is
pressed quickly again, the welding current will go back.
t( s)
0
I(A)
Loosen the
switch
welding gun
t1
t5
Striking
success
Press and hold the
welding gun switch
Arc is
turned off
t3
t4
t2
Welding current Is
The setting base
current lb
Notices:
•
Check the condition of welding and connection units first, otherwise there may be malfunctions such as ignition sparks
,
gas
leakages
,
loss of control and so on.
•
Check whether there is enough Argon gas in the shield gas cylinder, you can test the electromagnetic gas valve via the switch
on the front panel.
• Do not let the torch aim at your hand or other parts of your body. When you press the torch switch, the arc is ignited with
a high-frequency, high-voltage spark and the ignition spark can cause interferences in equipment.
• The flow rate is set according to the welding power used in the job. Turn the regulation screw to adjust the gas
flow which is shown on the gas hose pressure meter or the gas bottle pressure meter.
• The spark ignition works better if you keep the 3mm distance from the workpiece to the tungsten electrode during the
ignition.
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