15
MIG Welding
Troubleshooting
The general approach to x Gas Metal Arc Welding
(GMAW) problems is to start at the wire spool then
work through to the MIG torch. There are two main
areas where problems occur with GMAW, Porosity
and Inconsistent wire feed.
When there is a gas problem the result is usually
porosity within the weld metal. Porosity always
stems from some contaminant within the molten
weld pool which is in the process of escaping
during solidication of the molten metal.
Contaminants range from no gas around the
welding arc to dirt on the workpiece surface.
Porosity can be reduced by checking the following
points.
WARNING!
Wire feeding problems can be reduced by checking the following points.
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