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Safety
Data
Sheets
(MSDSs)
and manufacturers
instructions for any materi
als used.
When
possible
cut
over a
water
table
or
work
fable
designed
to minimize
fumes, gases,
and
sparks.
Cutting
aluminum
plate
on a
water
fable may
cause
hydrogen
detonation
beneath
the
workpiece.
Contact
equipment
manufacturer for
recommended
practices
for
cutting
aluminum.
FLYING
SPARKS
AND
HOT
METAL
can
cause
fire and burns.
Do
not cut
where
flying sparks
can
strike flam
mable material.
Protect
yourself
and others from
flying sparks
and hot metal.
Allow work and
equipment
to
cool before han
dling.
Watch for
fire,
and
keep
a
fire
extinguisher
nearby.
ARC RAYS
can
burn
eyes and
skin;
NOISE
can
damage
hearing.
Wear
safety goggles
with correct filter shade.
Wear
a
face shield.
Cover skin.
Protect
ears.
PILOT ARC
can cause
burns.
Keep
torch
tip
away from
personnel
when
switch is
pressed.
CUTTING
WORKPIECE
ON
CONCRETE
FLOOR
can cause
concrete to
explode.
Do
not
place workpiece directly
on
concrete
floor.
HOT METAL SPARKS
will mark
glass
and
burn trim.
Remove,
cover,
or
protect
any
glass
or
trim.
CUTTING CURRENT
can
damage
vehicle
computer(s)
and other electronic
compo
nents.
Disconnect
both
battery
cables before
cutting
on a
vehicle.
Place work
clamp
as
close
to
the
cut
as
possi
ble
to
avoid
long
electrical
paths.
Be
sure
torch to
power
scurce as
well
as
lead
connections
to work
clamp
are
clean and
tight.
To be 100
percent
free of
risk,
disconnect the
computer(s)
from the vehicle.
See Section
1
-
Safety
Rules for basic
safety
in
formation.
5-1.
PLASMA ARC CUTTING
(PAC)
a
WARNING:
Read and follow
safety
informa
tion
at
beginning
of entire Section
5
before
proceeding.
1.
Install and
connect
unit
according
to
Section
3.
2.
Place the
GAS/AIR
switch
in the
SET
position.
3.
Place the POWER switch/breaker
in the
ON
posi
tion. The POWER ON
light
will
come
on.
4.
Turn
on
air
supply,
and
adjust
air
filter/regulator
to
50 PSI
(3.4 bars)
while
observing
air pressure
gauge
on rear
of unit. For proper
regulation,
the
rec
ommended
output
from the air
supply
should pro
vide
a
minimum of 80
PSI
(5.4 bars)
and
a
maximum
of 150 PSI
(10.2
bars).
Make
pressure
adjustment
according
to
Figure
3-1
as
follows:
a.
Loosen
locking
screw
in center of air
filter/regu
lator
adjustment
knob.
b.
Turn air
filter/regulator adjustment
knob clock
wise
to
increase pressure
setting
or
counter
clockwise
to
decrease
pressure
setting.
c.
Tighten locking
screw.
5.
Place the METAL switch in the desired
position
(see
Section
4-3).
6.
Rotate the THICKNESS control
to the
desired
posi
tion
(see
Section
4-4).
7.
Place the GAS/AIR switch
in the
CUT
position.
The
READY
light
will
come on
indicating
that the unit is
ready
for
operation.
8.
Place the TRIGGER
hold switch in the
NORMAL
position (see
Section
4-6
for
long cutting
opera
tions).
9.
Wear
dry insulating gloves
and
clothing,
and
wear
safety goggles
with
correct
filter shade
according
to
ANSI Z49.1.
10. Connect work
clamp
to
clean,
bare
metal
at
workpiece.
11.
Place
tip
of torch
at
edge
of metal
to
be
cut
with
hole
in
tip just
over
metal
edge.
12.
Press torch switch.
There will be
approximately
2
seconds of
pref
low air before
arc
starts.
13. Once
arc
starts,
drag tip slowly
and
smoothly
across
material.
Adjust
torch
speed
so
that
sparks
are
di
rected
through
material away from torch
tip. Proper
cutting
speed
is
being
used
when
sparks
go
out
bot
tom
of
cut.
14.
Pause
briefly
at
end of
cut to
allow metal
bridge
to
be
Cut,
and then release torch switch. Postflow air
will
flow for
approximately
10 seconds
to
cool the
torch. If another
cut
is started before
postf
low
ends,
the
arc
will start
immediately.
IMPORTANT: This unit
can
also be used
to
pierce
the
material
to start
a
cut
away from
the
metal
edge.
On
light
gauge
material,
there
will be little
or no
additional
wear
on
torch
parts,
but
as
the material becomes
thicker,
the
wear
will
increase
accordingly. Always pierce using
a
slight
gap
or
angle
to
the material
so
that molten metal
will
be blown
a
way from the torch
tip.
Molten metal b/ow
ing
back
onto
the torch
tip
will
further reduce the
tip
life.
Wear
a
face shield if any
piercing
is
to
be
part
of the
op
eration.
OM-296
Page
12
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