OPERATION
19
§4.3.2 Gun switch control current
§4.4 Argon Arc Welding Operation
§4.4.1 TIG welding
（
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.
Pulsed TIG long welding
（
4T
）
：
t( s)
0
I( A)
Loosen the
switch
t1
t5
t7
Striking success
Stop arc
t3
t4
Base current setting
value
t2
t6
Loosen the
switch
Repress down the
switch
Start
current
Crater
current
Welding current (peak
current) setting value
Press and hold the
welding gun switch
Introduction
：
Adjustment knob of welding
current
Connected to the 8-lead aero
socket on the front panel
Adjustment knob of max welding
current
Gun switch
Adjust current button, when
it’s pushed up, the current
increase, when it’s pushed
down, the current decrease.
