12
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TIG WELDING (REF FIG.2)
• The machine is not equipped with a TIG welding torch and cables;
these are available from your Clarke dealer (Part number 6012232).
• Additionally, before TIG welding, you must obtain a gas cylinder of
100% pure Argon.
To prepare the unit for TIG welding, it is important that you adopt the following
procedure.
1. Plug the work clamp lead in to the +ve terminal, and secure the work
clamp to the workpiece.
• For good contact, the work clamp must be attached to clean bare
metal. Clean with a wire brush where necessary.
2. Plug the torch lead to the -ve terminal.
3. Screw the pressure regulator on to
the gas bottle tightly, and attach
the gas hose to the inlet connector
securely, with a hose clip.
4. Turn the pressure regulator knob to
set a pressure of approx. 2.5kg/
cm
2
(35 lbf/in
2
).
5. Ensure the electrode at the torch
nozzle, protrudes by 4 - 5mm, also
ensure that the electrode is sharply
pointed with an angle of 40°-60°, if
it is not, grind it to shape. (Consult
your TIG Torch manual for the
procedure for adjusting the
electrode).
6. Set the welding current in
accordance with the thickness of
the material to be welded and the
size of tungsten electrode to be
used, (See page 14).
7. Switch ON using the switch
mounted on the rear panel. The green light on the front panel will glow.
8. If the machine stops at any time and the amber light comes ON, the
thermal overload has intervened. Wait until the welder has cooled
sufficiently (the amber light goes out) before restarting work.
Fig 2