8
Inserting the electrode:
Before changing the electrode, please check and make sure that the machine is switched
off. The uncontrolled triggering of a welding impulse can hereby be avoided.
(Fig. 3)
(Fig. 4)
Remove the argon nozzle (22) from the hand-piece (25) by twisting it in opposite
(alternate) directions, and gently pulling.
Unscrew the clamping nut (24), and insert a freshly sharpened tungsten electrode (23),
then tighten the clamping nut.
(
Hand tight only
).
UNDER NO CIRCUMSTANCES IS A SPANNER TO BE USED TO TIGHTEN THE
CLAMPING NUT.
Ideally, the electrode should protrude 4-6mm out of the nozzle (when replaced). (Fig. 4)
(Only use original, Thorium oxide free, electrodes).
Now replace the argon nozzle again.
Please note !
Argon nozzle (22), clamping nut (24), collet and electrodes (23) are all wear parts
(spare parts), and are therefore not covered by our warranty.
Connecting the glare protection system:
The round plug for the shutter (glare protection system “welding microscope USM”) is
inserted into the socket marked “Shutter / Welding Shield” (13) on the back of the machine,
and with aid of the nut, tightened. (
Hand tight only
).
Caution!
Only the Lampert-glare protection system “welding microscope USM” may be
connected to the PUK U3.
Other glare protection systems are not permitted and can result in permanent health
damage or lead to the damaging of the machine.
Please note !
Before starting to weld, always check to make sure that the eye-protecting filter
(Shutter) is functioning correctly.
By pressing in the rotary knob power (4), the eye protecting filter will change from
its clear setting (Luminescence DIN3) to its dark setting (Obscurity DIN11) and back
again when released.
Should the eye protecting filter (shutter) not change from its light to dark setting,
then it must be immediately replaced before any further work is carried out.
Connecting the gas supply:
Mount the flowmeter regulator to the bottle of inert gas, observing hereby the enclosed
instruction manual. (Wherever possible, use Argon with a purity of 99,99% i.e. “Argon 4,6“)
Mount the pressure hose to the quick coupling pieces on the flowmeter regulator, and the
connector for inert gas on the back of the machine (16); fasten these (
Hand tight only
).
Only use original pressure hose – supplied
.
Check all the pressure hose connections to ensure that they are all secure and there
are no gas leaks.
When all is correctly connected, open the valve on the gas bottle, and set the pressure on
the flowmeter regulator to ca.
2
litres per minute.
