- Down slope control : After completion of welding , the power should be reduced
gradually halt , this switch controls the decay time of the current. If a footswitch is
used, this key is “ 0” , adjustable by turning counterclockwise .
- After-ow time control : Due to the workpiece thermal oxidised , so be cool about gas
welder . To 10s , this button controls the after-ow time .
- Arc force control: MMA mode when the arc length varies, the voltage is changing
and at some point reach a critical value, when the strength of the arch is not ap-
propriate to maintain the melt. Then suddenly the automatic increases or decreases
the current is enough to maintain the melt. The controller can change the intensity
of control.
- Base current control : DC TIG pulses , this button controls the volume of stream valleys
- Pulse frequency control: If DC TIG PULSE position , the button sets the pulse frequency
( 0.5 to 300 Hz )
- Pulse time control: The length of each stage of the pulse cycle is controlled by set-
ting this function. It means that you can make the high amp stage of the pulse cycle
longer or shorter than the low amps stage of the pulse cycle. Each half cycle doesn’t
have to be balanced…it can be skewed to achieve the best result between melting
and freezing. Even though the pulse is happening several times a second, each half
phase of the pulse can be metered to give optimum results.
Indicators Features:
Indicators Overheating protection: If your work for a long time under heavy current,
internal parts are burned due to overheating. To prevent this, it is the light that, when
lit, stop the work, but do not turn it off, so after 2-3 minutes you can continue welding.
Abnormality indicator: Lights when abnormality is in use, so be sure to turn off the ma-
chine and reboot to check the operation. If you continue to behave abnormally,
contact your service technician or manufacturer.
3-2 . Operation steps of AC/DC TIG mode.
1. “AC / DC “ to switch to the “AC”
2. Turn power switch on fan starts.
3. Turn gas knob to adjust the gas ow to an appropriate value .
4. Workpiece , set the cleaning time button according to the degree of oxidation .
5. Torch start button , solenoid valve is activated , voice sounds high voltage , while gas
is owing out of the gun nozzle. The rst time you weld , hold the button for several
seconds gun down , will not start welding until the pipe is no air left. After completion
of welding , gas ows through the nozzle even seconds . This is designed so that the
weld points to protect from oxidation , so keep sutures over the gun.
6. Set the “ pre-ow “, “ after-ow “ and “ ramp “ time with the practice .
7. Keep the distance between tungsten and workpiece between 2mm and 4mm ,
press the gun button , you will hear his voice high-frequency ignition after the arc
penetrates through the splash disappears and you can start the work.
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