OPERATION
13
⚫
t1
：
Striking arc and output start current(the setting value is 5A).
⚫
t2
～
t3
：
Loosen the gun switch and the output current will drop according to the
pre-set time.
⚫
t3
：
Stop arc and argon still keeps on;
⚫
t3
～
t4
：
Post-gas time. It can adjust automatically according to the welding current.
⚫
t4: Argon stops to flow. Welding is finished.
注：如果在下降过程中松开焊枪开关，则自动熄弧。
The operation step of scraping arc:
1. Touch the tungsten electrode with workpiece.
2. Press the welding gun.
3. Lift the welding gun and strike arc.
Anti-eletrodepickup:
⚫
①
TIG: During the welding operation, if the tungsten electrode touches the workpiece to
form short-circuit, the protection mode will be transferred automatically and the welding
current will drop to the protection current to reduce the waste of tungsten electrode and
prolong its usage time.
⚫
②
MMA:
During the welding operation, if the electrode touches the workpiece to form
short circuit, after 2s, the welding current will drop to 0A to void the electrode getting red.
⚫
Automatically gas test function: When TIG welding, turn on the machine switch and open the
gas valve to output shielded gas and maintain 10 seconds.
§4.4.2 Striking arc way for MMA
⚫
Knocking arc: take the electrode upright to touch the workpiece, after forming short circuit,
quickly lift up about 2~4 mm, and arc will be ignited. This method is difficult to master. But
in the welding for the brittle or hard steel, it is better to use knocking way.
