Saf-Fro PRESTOTIG 315 AC/DC Manual De Instrucciones página 14

GTAW welding
DC TIG Welding
To start DC Tig welding process:
5.) Set polarity
6.) To select TIG welding:
Process
Press MODE several times until the LED above lights up
Led 2T turned on for default.
LIFT TIG
When the mode pushbutton is in the Lift TIG position,
the machine is ready for Lift TIG welding. Lift TIG is a
method of starting a TIG weld by first pressing the TIG
torch electrode on the work piece in order to create a low
current short circuit. Then, the electrode is lifted from
the work piece to start the TIG arc.
HF TIG
When the mode pushbutton is in HF TIG position, the
machine is ready for HF TIG welding. During the HF
TIG mode, the TIG arc is started by HF without pressing
the electrode on the work piece. The HF used for
starting the TIG arc will remain on for 3 seconds; if the
arc is not started in this time limit, the trigger sequence
must be restarted.
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
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.
English
Visualization
Lift
HF
Visualization
Lift
HF
11
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.
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
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.
Visualization
English