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1. Press and hold the TIG torch trigger to start the
sequence. The machine will open the gas valve to
start the flow of the shielding gas. After the preflow
time, to purge air from the torch hose, the output of
the machine is turned ON. At this time the arc is
started according to the selected welding mode. After
the arc is started the output current will be at the
Start current. This condition can be maintained as
long or as short as necessary.
If the Start current is not necessary, do not hold the
TIG torch trigger as described at the beginning of this
step. In this condition, the machine will pass from
Step 1 to Step 2 when the arc is started.
2. Releasing the TIG torch trigger starts the upslope
function. The output current will be increased at a
controlled rate, or upslope time, until the Welding
current is reached.
3. Press and hold the TIG torch trigger when the main
part of the weld is complete. The machine will now
decrease the output current at a controlled rate, or
downslope time, until the Crater current is reached.
This Crater current can be maintained as long or as
short as necessary.
This sequence has an automatic restart so welding
will continue after this step. This operation, 4-step
restart enabled, is the default setting from the
factory. If the weld is completely finished, use the
following sequence instead of step 3 described
above.
3A. Quickly press and release the TIG torch
trigger. The machine will now decrease the
output current at a controlled rate, or downslope
time, until the Crater current is reached and the
output of the machine is turned OFF. After the arc
is turned OFF the postflow time will start.
4. Release the TIG torch trigger. The output current will
again increase to the Welding current, like in step 2,
to continue welding. When the main part of the weld
is complete go to step 3.
English
As shown here, after
the TIG torch trigger is
quickly pressed and
released from step 3A,
it is possible to press
and hold the TIG torch
trigger another time to
end the downslope
time and maintain the
output current at the
Crater current. When
the TIG torch trigger is
released the output will again increase to the
Welding current, like in step 4, to continue welding.
When the main part of the weld is complete go to
step 3.
As shown here, again
after the TIG torch
trigger is quickly
pressed and released
from step 3A, it is
possible to quickly
press and release the
TIG torch trigger a
second time to end the
downslope time and
stop welding.
Maintenance
For any repair operations, modifications or
maintenances, it is recommended to contact the nearest
Technical Service Center or Lincoln Electric. Repairs
and modifications performed by unauthorized service or
personnel will cause, that the manufacturer's warranty
will become null and void.
Any noticeable damage should be reported immediately
and repaired.
Routine maintenance (everyday)
Check condition of insulation and connections of the
work leads and insulation of power lead. If any
insulation damage exists replace the lead
immediately.
Remove the spatters from the welding gun nozzle.
Spatters could interfere with the shielding gas flow to
the arc.
Check the welding gun condition: replace it, if
necessary.
Check condition and operation of the cooling fan.
Keep clean its airflow slots.
Periodic maintenance (every 200 working hours but
at list once every year)
Perform the routine maintenance and, in addition:
Keep the machine clean. Using a dry (and low
pressure) airflow, remove the dust from the external
case and from the cabinet inside.
If it is required, clean and tighten all weld terminals.
The frequency of the maintenance operations may vary
in accordance with the working environment where the
machine is placed.
6
04/03
WARNING
English
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