HU
EN
3-4 . Operation steps of TIG mode.
4T operation:
The start current and crater current can be pre-setting. This function can compensate the pos-
sible 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
fl
ow;
●
0~t1:
Gas Pre-
fl
ow time
(0.0~2 sec)
;
●
t1~t2: Arc is ignited at t1 and then output the setting value of start current;
(5-200A)
●
t2:
Loosen the gun switch, the output current slopes up from the start current;
(0.0-10 sec)
●
t2~t3: The output current rises to the setting value (Iw or Ib), the up-slope time can be ad-
justed;
(5-200A)
●
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 will drop in accordance with the
selected down-slope time.
(0.0-10 sec)
●
t4~t5: The output current slopes down to the crater current.
(5-200A)
The down-slope time
can be adjusted;
●
t5~t6: The crater current time;
●
t6:
Loosen the gun switch, stop arc and keep on argon
fl
owing;
●
t6~t7: Gas Post-
fl
ow time can be set by the post-gas time adjustment knob on the front
panel
(0.0-10 sec)
;
●
t7:
Electromagnetic valve is closed and stop argon
fl
owing. Welding is
fi
nished.
Notices:
• Check the condition of welding and connection units
fi
rstly, otherwise there will be malfunction
such as ignition spark, gas leakage, out of control and so on.
• Check that whether there is enough Argon gas in the shield gas cylinder, you can test the
electromagnetic gas valve through the switch on the front panel.
• Do not let the torch aim at your hand or else of your body. When you press the torch switch,
the arc is ignited with a high-frequency, high-voltage spark, and the ignition spark can cause
interferences in equipment.
• The
fl
ow rate is set according to the welding power used in the job. Turn the regulation screw
to adjust the gas
fl
ow which is shown on the gas hose pressure meter or the gas bottle pressure
meter.
• The spark ignition works better if you keep the 3mm distance from the workpiece to the tung-
sten electrode during the ignition.
t
䠄
s
䠅
0
I
䠄
A
䠅
t1
t5
t7
t3
t4
t2
t6
11
