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Porosity - poor weld appearance and colour.
1. Incorrect Gas.
2. Inadequate gas flow /
gas leaks.
3. Moisture on the base
metal.
4. Contaminated base
metal.
5. Contaminated filler
wire.
6. Incorrect filler wire.
Yellowish residue / smoke on the alumina nozzle & discoloured
tungsten.
1. Incorrect Gas.
2. Inadequate gas flow.
3. Alumina gas nozzle too
small for size of
tungsten being used.
Unstable Arc during DC welding.
1. Torch connected to DC
+.
2. Contaminated base
metal.
3. Tungsten is
contaminated.
4. Arc length too long.
Visit www.princessauto.com for more information
ARC 170 DUAL VOLTAGE ARC/TIG WELDER
1. Check that pure Argon is being used.
2. Check the gas is connected, check
hoses, gas valve and torch are not
restricted. Set the gas flow between
12 to 21 CFH flow rate. Check hoses
and fittings for holes, leaks etc.,
3. Remove all moisture from base metal
before welding.
4. Remove materials like paint, grease,
oil, and dirt, including mill scale from
base metal.
5. Remove all grease, oil, or moisture
from filler metal.
6. Check the filler wire and change if
necessary.
1. Use pure Argon gas.
2. Set the gas flow between 12 to 21 CFH
flow rate.
3. Increase the size of the alumina gas
nozzle.
1. Connect the torch to the DC- output
terminal.
2. Remove materials like paint, grease,
oil, and dirt, including mill scale from
base metal.
3. Remove 0.393 in. of contaminated
tungsten and re grind the tungsten.
4. Lower torch so that the tungsten is
off of the workpiece 0.07 to 0.19
inches.
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