H&S AUTOSHOT HST201, Руководство оператора

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OPERATION
18
4.2.2 TIG welding (2T operation)
This function, without the adjustment of start current and crater current, is ideal for
tack welding
、
transient welding and thin plate welding.
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
Process
：

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.

t4
～
t5: Post-gas time, after the arc is turned off. You can adjust it (0.1~10s) through
turning the knob on the front panel.

t5: electromagnetic gas valve turned off, the shield gas stops to flow, and welding is
finished.