Yeswelder YWA-160, Руководство пользователя, Страница: 18 / 24

TROUBLESHOOTING
TIG WELDING ISSUES
PROBLEM
Poor starting
Black area along
weld bead
Unstable Arc.
Arc wanders.
POSSIBLE CAUSE
Poor work clamp connection
Start current is too low
Oily or organic contamination on work
Tungsten electrode may be contaminated
Leaks in gas line or torch connection.
Gas tank is near empty
Contaminated base metal
Tungsten is contaminated.
Arc length too long
Tungsten incorrect or in poor condition
Insufficient gas shielding
Contaminated gas or leaks in gas line,
torch, or connections.
Poorly prepared tungsten.
Contaminated base metal.
Contaminated/lncorrect filler.
-15-
COURSE OF ACTION
Check and secure work connection.
Increase Start current.
Clean work piece
Grind to clean electrode.
Check connection
Replace the gas tank.
Remove materials like paint, grease, oil, and dirt, including
mill scale from base metal
Remove 25/64" of contaminated tungsten and re-grind the
tungsten
Lower torch so that the tungsten is Off Of the work piece
5/64"-13/64" (2-5mm).
Check that correct type of tungsten is being used. Remove
tungsten 3/4" from the weld end and re-sharpen the
tungsten
Check and set the gas flow between 20-30cfh flow rate.
Check gas line & connections
Grind marks should run lengthwise with tungsten, not circu
lar. Use proper grinding method and wheel.
Remove contaminating materials like paint, grease, Oil, and
dirt, including mill scale from base metal.
Check the filler wire and remove all grease, Oil, or moisture
from filler metal.