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OPERATION
Page 20
REPEAT
THIS TUNE-IN
PROCEDURE
if you se-
lect a new heat setting, a different diameter _vire,
or a different type wire.
NOTE: When
"tuning-in"
the wire speed for self-
shielding flux-core wire, you will find a very wide
"best-sounding
range", spanning as much as 60
degrees on the WIRE SPEED
contro!. It is impor-
tant to know that the heat of the arc and penetra-
tion into the base
metal increases
as the wire
speed
is increased
within
the "best-sounding
range" for a given heat setting.
Therefore, you can use the wire speed control to
slightlyincrease or decrease heat and penetration
for a given heat setting by selecting higher or lower
wire speed settings WITHIN the _est-sounding
range".
HOLDING
THE GUN
The best way to hold the welding gun is the way
that feels most comfortable to you. While practic-
ing to use your new welder, experiment holding the
gun in different positions untilyou find the one that
seems to work best for you.
Position
of the Gun to the Work Piece
There are two angles of the gun nozzle in relation
to the work piece that must be considered
when
welding.
1. Angle "A" can be varied, but in most cases the
optimum angle will be 60 degrees;
the point at
which the gun handle is parallel
to the work
piece.
If angle "A" is increased,
penetration will
increase.
If it is decreased,
so will penetration.
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2. Angle "B" can be varied for two reasons: to
improve the ability to see the arc in relation to
the weld puddle and to directthe force of the arc.
The force of the welding arc follows
a straight tine
out the end of the no>>te. If angle "B" is changed,
so will the direction of the arc force and the point at
which penetration will be concentrated.
On a butt weld joint, the only reason to vary angle
"B" from being perpendicular (straight up) to the
work piece would be to improve visibility of the
weld puddle. In this case, angle "13' can be varied
anywhere from zero to 45 degrees with 30 degrees
working about the best.
30
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Angle A
On a fillet weld joint the nozzle is generally posi-
tioned in such a manner so as to "split" the angle
between the horizontal and vertical members of
the weld joint. In most cases, a fillet weld joint is a
90 degree angle so angle "13"will most often be 45
degrees.
45"..---_
.
f/
%
%
%
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Angle B
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