Soham Impex SI-TIG-300, Operating Manual

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Press and hold the Tig torch switch to start sequence. The machine will open gas valve to start flow of
shield gas, after preset gas pre-flow time to flow time to purge air from torch hose the welding output of
machine will be turned on and the arc will be started at start (min) current This condition can be
maintained as long as required. Release the Tig torch switch to go to step 2, the machine will now
increase output to peak (main) current in time set by slope-up. Press and hold the Tig torch switch
when main weld is complete. The machine will now decrease the welding output current to finish (min)
in down-slope time set. Once at finish (min) output you can release the Tig torch switch to end weld the
gas post-flow will continue to run for set time. Foot pedal operation When using a foot pedal you can
adjust the amperage while you are welding by pressing the pedal, the more you press the more amps
you will achieve. The foot pedal at maximum depression will go to the amperage set in LED before
welding. I.E set the welding amps to 120A and when pedal is fully depressed you will achieve
120Amps. Foot pedal can't be used with 4T operation, ensure 2T operation is set. Remote amperage
torch, When using a remote amperage torch you can adjust the amperage while you are welding by
using your thumb to adjust knob on torch handle. This does take some getting used to but is handy
when you are welding in a position where a foot pedal is not use-able. You can use a remote
amperage torch in 2T or 4T mode, most common is 4T as you press trigger to start weld and then
release you can then use thumb/finger for torch switch to adjust amperage knob, once weld has
finished press the torch switch again to finish weld.
10. AC Waveform / DC selector The machine features AC and DC operation, it also has 4 x AC
waveforms allowing very specialised welding to be carried out. Advanced Squarewave is the default
mode and offers excellent arc control. Soft square and Sinewave are similar to older transformer style
welders. Soft square gives a smooth buttery feel and maintains good control of the arc Sinewave gives
a softer arc with less control. Triangular wave is designed for rapid wet in and high travel speed and a
rapid freeze of weld puddle.
11. AMP/FUNCTION : Display It displays Welding parameter values as well as Nominal , Actual ,
Hold values of Welding Current
12. VOLTAGE : Display It displays Welding parameter values as well as Nominal , Actual , Hold
values of Welding Voltage
13. LED Data indicator : Warning On This also includes a self diagnosing function which shows an
error code if case of machine problem.
14. LED Data indicator This single display shows the data always accompanied by a corresponding
LED light which indicates what value is being represented. Amps Seconds Percent % Hertz