Lincoln Electric ASPECT 200, Руководство оператора

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English 12 English
NOTE: The HF start strength is adjusted to the
tungstensize and type, which can be selected in menu
GTAW.
AC Tig Welding
To start AC Tig welding process:
1. Set polarity
2. To select AC Tig welding:
Process Visualization
Lift
HF
Press MODE several times until the LED above lights up
2T led is turned on for default.
Ac wave shape section is available. About Lift and Tig
starting see section above.
TIG Welding Sequences
During no welding operation at each pressure of SEL
push button, it’s possible to step through all sequencer
and set parameters.
During welding the Sel pushbutton is enabled for the
following functions:

Output current

Only if Pulse Function is active: is possible operates
on the values of Duty (%), Frequency (Hz) and
Background current (A).
The new parameter value is automatically saved.
TIG Trigger Sequences
TIG welding can be done in either the 2-step or 4-step
mode. The specific sequences of operation for the trigger
modes are explained below.
Table 5. Legenda of the symbols used
Torch Pushbutton
Output Current
Gas Pre-flow
Gas
Gas Post-flow
2-Step Trigger Sequence
To select 2-Step sequence:
Output Visualization
Press several times until the LED above lights up
With the 2-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. The initial
current is set to 25A for LIFT starting (starting current
parameter is disabled in the sequencer) or set
according to the Starting current parameter for HF
starting. After the arc is started the output current will
be increased at a controlled rate, or upslope time, until
the Welding current is reached.
If the torch trigger is released during the upslope time
the arc will stop immediately and the output of the
machine is turned OFF.
2. Release the TIG torch trigger to stop welding. 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 gas valve will remain
open to continue the flow of the shielding gas to the
hot electrode and work piece.