22
SC900
Operations
‐
Welding
Visual
Weld
Inspection
and
Adjustments
Good
Weld
After
shooting
the
stud,
break
away
ferrule
and
visually
inspect
the
weld.
The
collar
should
be
smooth
and
even
around
the
entire
stud.
Partial
Weld
This
is
when
the
collar
does
not
extend
around
the
entire
perimeter
of
the
base
of
the
stud.
This
normally
occurs
when
the
weld
power
is
set
too
low.
Irregular
Weld
This
is
when
the
collar
forms
a
bumpy
or
jagged
collar
around
the
base
of
the
weld
stud.
This
normally
occurs
when
the
weld
time
is
set
too
high.
Porous
Weld
Collar
This
usually
occurs
from
the
oxidation
of
the
weld
pool
resulting
from
the
weld
time
being
set
too
long
and/or
the
current
being
too
low.
Reduce
the
current
and/or
reduce
the
weld
time
to
correct.
Weld
Collar
Off
‐
Center
This
is
when
the
collar
is
heavy
or
thick
on
one
half
of
the
base
of
the
weld
stud.
The
stud
may
also
be
tilted.
This
usually
results
from
movement
from
the
gun
during
the
weld
process
or
the
gun
not
being
flush
or
perpendicular
to
the
base
material
during
welding.
