Oerlikon CITOTIG 315, Operator'S Manual

Page: 19 / 429

English 15 English
As shown above, it is possible to press and hold the TIG
torch trigger a second time during downslope to end the
downslope function and maintain the output current at
the Crater current. When the TIG torch trigger is
released the output will turn OFF and the postflow time
will start. This operation sequence, 2-step with restart
disabled, is the default setting from the factory.
2-Step Trigger Sequence with Restart Option
To select 2-Step with restart sequence:
Output Visualization
Press several times until the LED above lights up
Enter Menu GTAW and enable 2RST option.
If the 2-step restart option is enabled from the setup
menu the following sequence will occur:
1. Press and hold the TIG torch trigger to start the
sequence as described above.
2. Release the TIG torch trigger to start the downslope.
During this time press and hold the TIG torch trigger
to restart welding. The output current will increase
again at a controlled rate until the Welding current is
reached. This sequence can be repeated as many
times as necessary. When the welding is complete
release the TIG torch trigger. When the Crater
current is reached the output of the machine is
turned OFF.
4-Step Trigger Sequence
To select 4-Step sequence:
Output Visualization
Press several times until the LED above lights up
With the 4-step trigger mode and a TIG welding mode
selected, the following welding sequence will occur.
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. In LIFT starting the touching
current is 25A until the short circuit is removed.
After the arc is started the output current will be at the
Start current. This condition can be maintained as long
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. If the torch trigger is pushed
during the upslope time the arc will stop immediately
and the output of the machine is turned OFF.
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.
4. This Crater current can be maintained as long as
necessary. When the TIG torch trigger is released
the output of the machine is turned OFF and the
postflow time will start.