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TIG (GTAW) WELDING
After setting the machine as described above proceed to current adjustment (6), welding process starts
by pressing the torch button. For normal welding torch must be held at a certain distance from the welding
spot. It is roughly the same distance as tungsten electrode diameter. When placed too close welding
material and torch components (such as welding tip) can burn out.
TIG AC WELDING, is used for welding aluminium, magnesium and their alloys as opposed to TIG DC process
used for most other metals. Select ''AC'' current type (25) and TIG with welding process selection button
(13). For fine adjustment of welding parameters there is AC frequency ranging from 35 to 250 Hz on knob
(B5) and balance (clean ratio) on knob (C). Use lower frequency for a softer, wider arc with shallow
penetration and high frequency for a more precise arc with deeper penetration. A high frequency with
lower current adjustment is often used for welding thin materials. Balance control allows for shallower
penetration with more positive time and deeper penetration with more negative time – both is expressed
when knob (C) is turned. For quick reference the table below describes clean effect:
Rotary knob
Effect
Current waveform
Tungsten electrode consumption
In TIG WELDING 4T mode is often used. To activate the 4T function see the SECONDARY MENU – D08.
Select the 2T, 4T or 4T with second current with button (12). In 4T operator does not need to hold the
torch button continuously. The button now works as a switch. By pressing it the arc is switched on or off
and by holding the button current remains at start / end current (4, 9). In 4T mode a welding session
follows the diagram below:
Tight and deep
more
36
Wide and flat
fewer
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