Specifications

F.
Adjusting
Hub
Tension
To
adjust
hub
tension,
slowly
unwind
wire
and
pull
end
toward the
drive
roll
gears
to
check
hub
tension,
wire should
unwind
freely,
but
hub
tension
should be
sufficient
to
keep
it
taut and
prevent
backlash
when
drive
motor
is
stopped.
If
adjustment
is
required,
loosen
or
tighten
nut
on
the end
of
the hub
shaft.
G.
Threading
The
Welding
Wire
(Figure
2-9 and
2-11)
Proceed
as
follows
to thread
welding
wire:
1.
Loosen the
wing
nuts
on
the
drive roll
assembly,
turn
the
pressure
adjustment
studs downward
and
lift
the
upper
drive
rolls
upward.
2.
Straighten
or
cut
off
the
free endof
the wire and
pass
it
through
the
inlet
wire
guide
in
the drive
roll
assembly.
3.
Continue
the wire
through
the intermediate
and
outlet
guides.
4.
Tip
the
upper
drive
roll
gears
downward
making
sure
the
upper
drive
gears
mesh with
the
lower
drive
gears.
5.
Bring
the
drive
roll
pressure
adjustment
studs
upward
making
sure
the lower washer
comes
above the
upper
drive
roll
assemblies.
6.
Turn the
pressure
adjustment
wing
nut
in
the
clockwise
direction until
the drive roll
gears
are
tight against
the
welding
wire.
Do
not
tighten
too
tight.
Further
adjustments
canbe made
after
the
welding
machine and
control/feeder
are
put
into
operation.
7.
Connect
the torch
or
gun
to
the
control/feeder
according
to instructions
in
Torch
or
Gun
Manual,
8.
Place the
control/feeder
power
switch in
the ON
position.
9.
Place
the
RETRACT-FEED Switch
in the
FEED
position.
(Figure
31)
10.
Push
the
INCH
Switch
in
the
upward
direction.
This
will
run
the wire
through
the torch
or
run
without
energizing
the
welding
machine
welding
circuit,
If
wire
slippage
occurs
between
drive
rolls,
tighten
Pressure
Adjustment
Wing
Nuts
until
slippage
stops.
If
wire is
run
out
beyond
the torch
or
gun
tip,
plaCe
the
RETRACT-FEED
.Switch
in the
RETRACT
position
and
push
the
INCH
switch in the
upward
position.
Release
INCH
switch
after
end
of
wire is
approximately
one
inch
from
the end
of
the torch
or
gun
tip.
Be
sure
to
RETURN RETRACT-FEED
switch to
the
FEED
position.
SECTION
3
-
OPERATION
3-1. SAFETY
REQUIREMENTS
Comply
with
all
ventiation,
fire
and other
safety
requirements
for
welding
as
established
for
in
dustrial
applications.
Reference
as
applicable:
1.
Safety
Rules
for
Operation
of Arc
Welding
Ma
chines
-
See
Arc
Welding
Machine Instruction
Manual.
2.
Safety
In
Electric and Gas
Welding
and
Cutting
Operations

See American
Standards Asso
ciation:
Bulletin
Z49.1,
1958.
3.
Recommended
Safe
Practices
for InertGas
Metal-Arc
Welding
-
See
American
Welding
Society:
Bulletin
A6.1,
1958.
Because
of infra-red
radiation emitted
by
the
high-density
arc
in
Gas
Metal-Arc
Welding
methods,
FLASH
GOGGLES
(medium-shade)
are
recommend
ed
in
addition to
HELMETS
for
the
operator
and
nearby
personnel.
The
welding
wire
(electrode)
and
all metal
parts
in
contact
with it
are
electri
cally
energized
while
welding,
thus
requiring
peri
odic
inspection
for
broken
insulation,
water
leakage
(if used)
and other electrical
hazards.
3-2.
PRE-WELD
REQUIREMENTS
Prior
to
welding,
ensure
the
following
procedures
are
accomplished.
A.
Gas
And Water
Supply
(Figure
3-1)
Connect
gas
and water
supply
as
follows:
1.
Inspect
all
hose and
cabling
connections
for
secure
fittings.
2.
If
interconnections
are
complete
and satis
factory,
place
the
gun
or
torch in
a
safe location
where the
exposed
welding
wire
(electrode)
will
not
touch
anything.
3.
Place
the
welding
machine
power
switch
in
the
ON
position.
4.
Open
the valve
on
the
gas
cylinder.
5,
Turn the
water
coolant
supply
ON
(if
used).
6.
Push
the
PURGE
button and
adjust
gas
flow
regulator.
Hold the
button
in
for
a
few
seconds,
long
enough
to
remove
the
airfromthe
shielding
gas
supply
line.
NOTE
When
installing
new
equipment,
or
after
prolonged
shutdown,
allow
shielding
gas
tO flow
continuously
for
at
least
one
minute
prior
to
welding
in order to
purge
the
gas
line,
7,
Inspect
water
drain
hose
(if
used)
.
,
.
there
should be
no
leakage
at
gland
fittings
and used
AA-056 132-8
Figure
2-11.
Threading Welding
Wire
CAUTION
I
I
I
Whenever
steps
are
taken
to
remove
and
repair
such
hazards,
place
all
power
controls
OFF
and
disconnect all
electrical
cabling
from
the
welding
machine.
I
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6