Manual no. WDT90100 Page 20
CoolTig - 220
5-2. Operation(TIG)
USE SINGLE PHASE 115V/208V/230V POWER SUPPLY.
5-2.1.Always use DCEN (electrode connects to negative output) for both DC and AC,
using pulse or not using pulse.
5-2.2.Connect up the shielding gas, foot pedal, torch and work lead to power source
according to figure 4.1, 4.2, make sure connections are firm and reliable.
5-2.3.Switch on the power source. Select TIG mode (AC or DC) with the process
selection button.
5-2.4.Set Welding parameters to desired value, refer to section 5.6: Welding
parameter selection chart and section 5.1: front panel layout and description.
DC: used for steel or stainless steel welding.
AC: used for Tig welding aluminum (and its alloys) or magnesium. During the
electrode positive half wave the oxide is broken. During the electrode negative
half wave, the electrode cools, the workpiece melts and penetration occurs.
Pulse: usually used for thinner plate TIG welding which needs to carefully
control the heat input and obtain “scale” type seam. Pulse frequency will
influence the heat input, lower frequency have higher heat input in each pulse,
so it is preferred for thicker plate. In the same time, lower frequency need high
welding speed otherwise the interval between the melding nut will too large and
deteriorate the seam strength.
5-2.5.Press parameter adjust knob to select and dial the knob to change following
TIG parameters:
Welding current pre-set (default 100A)The display value of digital current meter
will change when you turn the parameter adjust knob to pre-set the parameters. And
during welding, the amperage meter will reflect actual welding current output.
Pulse frequency (0.5-20Hz, default off): turn knob to far-left until “OFF”
displayed in the left meter to turn the pulser off.
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