PRO-POINT 9085986 Mode D'emploi page 38

9085986
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.
Arc wanders during DC welding.
1. Poor gas flow.
2. Incorrect arc length.
3. Tungsten incorrect or in
poor condition.
4. Poorly prepared tungsten.
5. Contaminated base
metal.
6. Contaminated filler wire.
7. Incorrect filler wire.
38
AC/DC Inverter TIG/Arc Welder
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. Use the table in Appendix B or C to set the rate of
gas flow.
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.
1. Use the table in Appendix B or C to set the rate of
gas flow.
2. Lower torch so that the tungsten is off of the
workpiece 0.07 to 0.19 inches.
3. Check that correct type of tungsten is being used.
Remove 25/64 in. (0.393 in.) from the weld end of
the tungsten and resharpen the tungsten.
4. Grind marks should run lengthwise with tungsten,
not circular. Use proper grinding method and wheel.
5. Remove contaminating materials like paint, grease,
oil and dirt, including mill scale from base metal.
6. Remove all grease, oil, or moisture from filler metal.
7. Check the filler wire and change if necessary.
For technical questions call 1-800-665-8685
V1.0