12
t6
t5
t4
t3
t2
t1
0
I(A)
5
A
t(s)
Press the welding gun again
Loose the welding gun
Loose the welding gun
Welding current
Press the welding gun and hold it
Fig 4.4 the flow chart of the 4T operation
Introduction
：
0
：
Press and hold the gun switch, Electromagnetic gas valve is turned on.
The shielding gas stars to flow.
0
～
t1
：
Pre-gas time(0.1S)
t1
：
Striking arc and output start current (the setting value is 5A).
t2:
Loosen the gun switch and output welding current.
t3
～
t4
：
Press the gun switch again. The output current will drop to 5A within the
pre-set time.
t4
～
t5
：
Output crater current (the setting value is 5A).
t5
：
Loosen the gun switch, stop arc and argon still keeps on.
t5
～
t6
：
Post-gas time. It can adjust automatically according to the welding current.
t6:
Argon stops to flow. Welding is finished.
2T operation:
t(s)
I(A)
0
t1
t2
t3
t4
Loose the welding gun
The pre-set welding current
Press the welding gun and hold it
Fig 4.5 the flow chart of the 2T operation
Introduction
：
0
：
Press and hold the gun switch, Electromagnetic gas valve is turned on. The
shielding gas stars to flow;
0
～
t1
：
Pre-gas time(0.1S)
