Mma Troubleshooting - Impax IM-MULT160-K Instruction Manual

MMA TROUBLESHOOTING

PROBLEM
Excessive spatter (beads
of metal scattered around
the weld area)
Uneven and erratic weld
bead and direction
Lack of penetration - The
weld bead fails to create
complete fusion between
material to be welded,
often surface appears
okay but weld depth is
shallow
Porosity - Small holes or
cavities on the surface or
within the weld material
Excessive penetration -
The weld metal is below
the surface level of the
material and hangs below
Burning through - Holes
within the material where
no weld exists
Poor fusion - Failing of
weld material to fuse
either with the material to
be welded or previous
weld beads
POSSIBLE CAUSE
Amperage too high for the
selected electrode
Voltage too high or arc length too
long
Weld bead is inconsistent and
misses joint due to operator
Poor joint preparation
Insufficient heat input
Poor weld technique
Work piece dirty
Electrode is damp
Arc length is excessive
Heat input too high
Poor weld technique
Heat input too high
Insufficient heat level
Poor welding technique
Work piece dirty
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REMEDY
Reduce amperage or utilise larger
diameter electrode
Reduce arc length or voltage
Operator training required
Joint design must allow for full access
to the root of the weld
Material too thick
Increase the amperage or increase
the electrode size and amperage
Reduce travel speed
Ensure the arc is on the leading edge
of the weld puddle
Remove all contaminant from the
material i.e. oil, grease, rust, moisture
prior to welding
Replace or dry the electrode
Reduce the arc length
Reduce the amperage or use a
smaller electrode and lower amperage
Use correct welding travel speed
Use lower amperage or smaller
electrode
Use correct welding travel speed
Increase the amperage or increase
the electrode size and amperage
Joint design must allow for full access
to the root of the weld
Alter welding technique to ensure
penetration such as weaving, arc
positioning or stringer bead technique
Remove all contaminant from the
material i.e. oil, grease, rust, moisture
prior to welding