Top Gun TIG 320 AC/DC, Руководство оператора

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MAINTENANCE AND TROUBLESHOOTING
21

t6
～
t7
：
Post-gas time can be set by the post-gas time adjustment knob on the front panel
（
0.1
～
10S
）
;

t7
：
Electromagnetic valve is closed and stop argon flowing. Welding is finished.
§4.4.2 TIG welding (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.
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
Introduction
：

0: Press the gun switch and hold it. 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 and the output current rises to the setting welding current (Iw or Ib) from
the min welding current.

t2
～
t3: During the whole welding process, the gun switch is pressed and held without
releasing.
Note: Select the pulsed output, the base current and welding current will be outputted alternately;
otherwise, output the setting value of welding current;

t3: Release the gun switch, the welding current will drop in accordance with the selected
down-slope time.

t3
～
t4: The current drops to the minimum welding current from the setting current (Iw or Ib),
and then arc is turned off.

t
4 ～
t5: Post-gas time, after the arc is turned off. You can adjust it (0.1~10s) through turnning
the knob on the front panel.