Miller Auto Arc Manual do Proprietário - Página 8

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Miller Auto Arc Manual do Proprietário
3-2.
ELECTRICAL
INPUT
CONNECTIONS
dards and any additional
state
and
local codes.
A cord with
plug
attached is
provided
on
this unit. Check
nameplate
for
input voltage requirement,
and
connect
the
plug
to
a
properly grounded
and
protected (fuses
or
circuit
breakers)
115 volt
ac
receptacle capable
of
sup
plying
15 amperes. Be
sure
that the
building supply
and
receptacle comply
with National Electrical Code
stan-
IMPORTANT:
The
supply wiring
for the resistance
welder
must
be
capable
of
handling
a
15 ampere load.
The resistance welder
must
be the
only
load connected
to
the
supply
circuit. Poorunit
performance
or
frequently
opening
line fuses
or
circuit breakers
can
result from
an
inadequate
or
improper supply.
SECTION
4
SEQUENCE OF OPERATION
a
WARNING: ELECTRIC SHOCK
can
kill.
Do not touch
live electrical
parts.
Keep
all covers
in
place
while
operating.
Warranty
is void if resistance welder is
operated
with any
portion
of the
outer
enclosure removed.
HOT METAL AND SPARKS
can
cause
fire
and
burns.
Wear
correct
eye,
ear,
and
body protection.
Allow
equipment
and work
to
cool before han
dling.
Watch for fire.
Have
a
fire
extinguisher nearby,
and know
how
to
use
it.
FUMES
AND GASES
can
seriously
harm
your health.
Ventilate
to
keep
from
breathing
fumes
and
gases.
If
ventilation is
inadequate,
use
approved
breathing
apparatus.
MOVING PARTS
can cause
serious
Injury.
Keep
clear of
pinch points.
MAGNETIC FIELDS FROM HIGH CURRENTS
can
affect
pacemaker operatIon.
Wearers should consult with their doctor be
fore
going
near
welding operations.
See Section
1
Safety
Rules For
Operation
Of
Portable Resistance
Spot
Welders for basic
welding safety
information.
4-1.
OPERATOR CONTROLS
A.
Start Switch
(FIgure 3-1)
The Start switch is
a
spring-loaded, momentary-contact
push
button which
provides
on/off control of the weld
output.
Push in and hold switch
for
desired weld time.
Releasing
the switch shuts off weld
output.
B.
Circuit Breaker
The circuit breaker
provides
overload
protection.
When
the unit is
operated
at
a
rate that
exceeds its
capacity,
the circuit breaker opens,
shutting
off weld
output.
Allow
a
brief
cooling period
before
resetting
the circuit break-
er.
4-2.
PIN WELDING
Pins
are
welded
onto auto
body
sheet metal dents. The
supplied
slide hammer is used
to
pull
on
the
pin, thereby
pulling
out the dent in the auto
body
sheet metal.
a
WARNING: Read and follow
safety
Informa
tion
at
beginning
of entire Section
4
before
proceedIng.
1.
Install
pin
electrode
(see
Section
3-1).
2.
Insert
pin
into electrode.
3.
Plug
in unit.
4.
Be
sure
that surface where
pin
is
to
be welded is
clean,
bare metal. Push
resistance welder
against
surface until electrode
outer
ring
is seated
against
clean,
bare metal.
5.
Press Start switch for 0.5
to 1.0 seconds.
There
should be
no more
than 1/8
to 1/4
in.
(3.1
to
6.3
mm)
discoloration around weld.
6.
Slip
slide hammer
over
pin
and
tighten.
7.
To
remove
dents,
pull
slide hammer with
a
constant
force and
tap
damaged
area
with
body
hammer.
If
necessary,
use
force
on
slide hammer
to
pull
dent
out.
8.
Afterdentispulledout,cutoff pin
and
grind
off head.
IMPORTANT: For
larger
indents,
several
pins
can
be
welded
onto the
body
at
1/2 in.
(13 mm)
interials and
clamped together. Clamped pins
can
be
pulled
using
a
come-along
or
body
and frame
straightening equip
ment.
4-3.
CLIP
WELDING
Trim
moulding clips
can
be welded
onto auto
body
sheet
metal
using
the resistance welder.
a
WARNING: Read
and follow
safety
informa
tlon
at
beginning
of entire Section
4
before
proceedIng.
1.
Install
clip
electrode
(see
Section
3-1).
2.
Insert
clip
into electrode.
3.
Plug
in unit.
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