Power Fist SMART TIG AC/DC-200P Manuel De L'utilisateur page 16

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WELDING CONFIGURATION CHARACTERISTICS
1. The DC MMA can be set to positive or negative polarity according to the electrode requirements.
2. AC MMA can avoid electromagnetic flow issues that can arise from use of DC AMA.
3. The DC TIG, DCEP configuration features a stable welding arc, low tungsten electrode loss, more welding current,
plus a narrow and deep weld.
4. The AC TIG (rectangle wave) configuration has a more stable arc than Sine AC TIG. This results in maximum
penetration, minimal tungsten electrode loss and a better clearance effect.
5. The DC Pulsed TIG configuration has the following characteristics:
a. Pulse heating. Metal in the molten pool remains at a high temperature for a short time and then cools quickly,
reducing the possibility of producing a hot crack in materials with thermal sensitivity.
b. Little heat is transferred to the workpiece. The arc energy is focused on the welding spot. This is suitable for
welding a thin sheet.
c. Control the heat input and size of the molten pool. The penetration depth is even. This is suitable for welding by
one side and forming by two sides and all position welding for pipe.
d. High frequency arc is suitable for high welding speed to improve the productivity.
6. The AC Pulse TIG provides the advantages of DC Pulsed TIG for aluminum workpieces.
CHOOSE A WELDING LOCATION
Selecting the proper location to use the welding unit can significantly increase the welding unit's performance, reliability
and lifespan.
Locate the welding unit in an environment that is clean and dry. Place the welding unit to ensure free circulation of air
around all sides of the welding unit. Dust and dirt can accumulate on the moving parts of the welding unit. Debris can
retain moisture and that can increase wear for moving parts.
The power outlet used for the welding unit must be properly grounded and the welding unit must be the only load on the
electrical circuit. See Power Requirements in the Installation section.
Turn the welding unit OFF before plugging into appropriate 230 volt 35 amp power outlet.
The use of an extension cord is discouraged for arc welding units. Extension cord use will significantly degrade the
performance of the welding unit.
OPERATION ENVIRONMENT
1. Operate below a height of 1,000 meters above sea level.
2. Operating temperature range: - 10°C to +40°C (14°F to 104°F).
3. Relative humidity is below 90% (+20°C / +68°F).
4. Preferably position the machine above the floor level, the maximum angle should not exceed 15°.
5. Protect the machine from heavy rain or against direct sunlight in hot circumstances.
6. Make sure there is sufficient ventilation during welding.
7. Maintain at least 12 in. (30 cm) between the machine and any walls.
PREPARING THE TORCH
The torch will require cleaning and preparation before each use. Any previous welding will leave carbon deposits and
molten bits on the nozzle and welding tip. The metal beads and carbon deposits will disrupt the shielding gas flow from
the nozzle, resulting in uneven protection of the weld puddle.
1. Remove the nozzle and inspect for molten beads inside the nozzle and on the end.
2. Insert a cylindrical metal brush into the cup opening and rotate while moving the brush up and down to remove the
metal beads and deposits.
3. The tungsten electrode may be shorter due to burn off. Loosen the collet and pull the tungsten electrode forward.
Retighten the collet by hand.
4. Screw the nozzle back into place and the torch is ready for use.
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SMART TIG AC/DC-200P Inverter Welding Machine
For technical questions call 1-800-665-8685
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