GWH3 datasheet(26/40 Pages) CLARKE

26 / 40 page

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TIG WELDING

Before TIG welding, you must obtain the correct torch and a gas cylinder of 100%

pure Argon. (see page 36)

To prepare the unit for TIG welding, 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/cm2

(35 lbf/in2).

5. Ensure the electrode at the torch

nozzle, protrudes by 4 - 5mm, also

ensure that the electrode is sharply

pointed with an angle of 40o- 60o if it

is not, grind it to shape.

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.

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.

GWH3 Datasheet(PDF) 26 Page - Clarke International