EN
3-4 . Operation steps of TIG mode.
4T operation:
The start current and crater current can be pre-set. This function can compensate the possible
crater that appears at the beginning and end of the welding. Thus, 4T is suitable for the welding
of medium thickness plates.
● 0:
Press and hold the gun switch, Electromagnetic gas valve is turned on. The shielding
gas stars to flow;
● 0~t1:
Pre-gas time (0.1~1S);
● t1~t2: Arc is ignited at t1 and then output the setting value of start current;
(DC:10-170A; AC:10-200A)
● t2:
Loosen the gun switch, the output current slopes up from the start current; (0.0-10sec)
● t2~t3: The output current rises to the setting value (Iw or Ib), the upslope time can be ad-
justed; (DC:10-170A; AC:10-200A)
● t3~t4: Welding process. During this period, the gun switch is loosen;
Note: Select the pulsed output, the base current and welding current will be outputted
alternately; otherwise, output the setting value of welding current;
● t4:
Press the torch switch again, the welding current (DC:10-170A; AC:10-200A) will drop
in accordance with the selected down-slope time. (0.0-10sec)
● t4~t5: The output current slopes down to the crater current. The downslope time can be
adjusted;
● t5~t6: The crater current time;
● t6:
Loosen the gun switch, stop arc and keep on argon flowing;
● t6~t7: Post-gas time can be set by the post-gas time adjustment knob on the front panel
(0.0-10sec);
● t7:
Electromagnetic valve is closed and stop argon flowing. Welding is finished.
I (A)
t (s)
0 t1 t2 t3 t4 t5 t6 t7
Is
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
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.
74
