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7-2.
Preparing
TLungsten
1
Tungsten
Electrode
1
2
Balled
End
Ball
end
of
tungsten
before
welding
by
applying
either
an
ac
amperage
slightly
higher
than
what
is
recom
mended
for
a
given
electrode
diam
eter
(see
NO
TAG),
or
a
dc
elec
trode
positive
amperage.
2
Ret.
S.0161
Figure
7-1.
Preparing
Tungsten
For
AC
Oir
DC
Electrode
Positive
(DCEP)
Welding
~AUTION
4
Figure
7-2.
Preparing
Tungsten
For
DC
Electrode
Negative
(DCEN)
Welding
F
LYING
SPARKS
AND
HOT
METAL
can
cause
injury
and
start
fires.
Shapetur~gsten
electrode
only
on
grinderwith
proper
guards
in
a
safe
location
wearing
properface,
hand,
and
body
protection.
Keep
f(ammables
away.
wam2.1
9/91
1
Tungsten
Electrode
2
Tapered
End
Grind
end
of
tungsten
on
fine
grit,
12
hard
abrasive
wheel
before
weld
ing.
Do
not
use
wheel
tor
other
jobs
or
tungsten
can
become
contami
kT-~
nated
causing
lower
weld
quality.
2-1/2
Times
Electrode
Diameter
Ref.
S.0161
1
1
Stable
Arc
i~:::::/~~
2
Flat
Ideal
Tungsten
Preparation
Stable
Arc
Ref.
S.0162
1
1
Arc
Wander
~
2
Point
~
3
Grinding
Wheel
~__,_~
4
Radial
Ground
4
Wrong
Tungsten
Preparation
Wandering
Arc
Ret.
S-0162
Diameter
of
this
flat
detormines
amperage
capacity.
3
Grinding
Wheel
4
Straight
Ground
OM-168
256
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