6
3.Turn on the argon gas switch and adjust gas flow to rated value( see flow meter).
4.Adjust the ratio of positive and negative current time according to oxidized condition of welded workpiece.
5.The solenoid valve is active after pressing the switch on welding torch and a sound generated by
high-frequency spark discharging in the welding machine will be heard. And the argon gas will flow from
welding torch nozzle at the same time. Note: for the first time of welding operation, the switch should be
pressed for several seconds before welding to exhaust all air in the gas pipeline. Argon gas will still flow out
for seconds after stopping welding operation. And it is a special design to protect welding point before it is
cooled. So the welding gun should be removed only after it is kept at the welding position for a period of time
when the electric arc is closed.
6.Set the hand/foot switch according to actual requirement.
1
）
The current is controlled by knob on the control panel when the transfer switch locates at “OFF”
position.
2
）
The current is controlled by foot switch when the transfer switch locates at “ON” position and
the knob on control panel is unavailable. The stepping force has a direct ratio compared with
welding current, and more force is applied on the switch, and bigger current is gotten.
7.Adjust pre-flow, post-flow and decay time according to actual requirement.
8.2-4 mm distance should be kept between tungsten electrode and welded workpiece. High frequency
discharge will be generated between the welding gun electrode and workpiece. The arc starting spark in
welding machine disappears immediately after igniting arc starting. The welding machine can operate
normally at that time.
Application of DC argon arc welding:
1. Locate the “AC/DC transfer switch” at “DC” position.
2. Turn on the power switch and the fan inside the machine start rotating.
3. Turn on the argon gas switch and adjust gas flow to rated value( see flow meter ).
4. Same operations as items 5.6.7.8 in the application of AC argon arc welding.