TW4300 Weld Inspection
Visual Weld Inspection and Adjustments
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After shooting the stud, break away ferrule and visually
inspect the weld.
Good Weld
A good weld will have a smooth and even fillet with a blue
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silver tint.
Partial Weld
A partial weld will result in a collar that does not extend around the entire
diameter of the stud base. This outcome often occurs when the weld
current is set too low.
Irregular Weld
Irregular welds normally occur when the weld time is set too high and the
fillet will be bumpy or jagged in appearance.
Porous Weld Collar
A porous weld fillet forms from the oxidation of the weld pool when the
weld time is set too long and/or current is set too low.
Weld Collar Off
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Center
Off
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center weld collars have a thick fillet on one half of the stud base and
the stud may be tilted. Typically moving the or not having the gun perpen-
dicular to the base material will result in an off
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center collar.
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