Clarke Arc/Tig135, Инструкция по эксплуатации и обслуживанию

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20
B TIG WELDING
To prepare the unit for TIG welding, it is important that you adopt the following procedure.
1. Plug the work return lead (earth clamp) in to the +ve terminal, and secure the work
clamp tothe 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.
Screw in the pressure regulator knob to set a
pressure of approx. 2,5Kg./cm2. (35 lbf/in
2 ).
4. Ensure the electrode at the torch
nozzle,protrudes by 4 - 5mm., also ensure
that the electrode is sharply pointed withan
angle of 40
° -60, if it is not, grind it
longitudinally.
5. 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 chart on page 20), and switch ON
using the switch mounted on the rear panel.
The green light on the front panel will glow.
6. Open the gas valve on the torch handle,
allowing gas to flow from the torch nozzle.
Cover your face with the head shield, bring
the torch to within 3-4mm of the work, and at
an angle of 45
° , so that the ceramic nozzle
gently touches the work surface. See fig. 3.
Fig. 3
Fig. 2