Maintenance - LORCH a-LTG/i-LTG Operating Manual

Maintenance

8 Maintenance
Before carying out maintenance
work: switch of power and gas
supply!
‰ Condition for long life and perfect function
of the TIG torch is to check regularly the
function of the torch.
‰ Additionally to the visual check before
every welding there should be made regu-
larly maintenance work and cleaning. We
recommend this once a week at one shift
working.
‰ Maintenance and cleaning should be
done only by authorized persons.
‰ Replace any damaged, deformed or worn
parts immediately.
‰ If repairs are necessary contact your local
LORCH dealer.
Check TIG welding torch if
 All insulations of welding end are undam-
aged and in the correct place.
 Electrode and fastening parts are undam-
aged and properly fasten.
 If surface of tungsten electrode is not
smooth, the electrode should be grinded.
 Flow of shielding gas is free and even.
 Gas nozzle is in good condition.
Check Torch cable if
 Insulation of handle and torch cable are
undamaged.
 All power, coolant and gas connections
are clean and fasten.
 Leather and sheathing show no external
damage such as cracks or (fire-) holes.
 There are no sharp bends in torch cable
(or hose).
12.15
Tips for grinding the electrode
‰ Check surface condition of electrode be-
fore each welding operation. The surface
condition of the electrode determines the
consistency of the current density and di-
rection of the arc.
‰ Electrodes must always be ground in lon-
gitudinal direction. The type of electrode
and angle of sharpening depends on the
material you want to weld. The sharpen-
ing angle specifically affects the width of
the welding run and depth of penetration.
Check your welding-handbook and elec-
trode supplier for specific parameters.
‰ For grinding we recommend the LORCH
TEG 4,0 grinding machine with infinite
angle adjustment, diamond grinding plate
with centre positioning, adjustable for di-
ameters up to 4.0mm, and stepless speed
regulation.
Ordering spare parts
 Part numbers can be found in the current
LORCH spare parts – price list or contact
your local LORCH dealer.
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