Welding Industries Weldmatic 180s, CP17 User Manual

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HEAD OFFICE AND EXPORT DIVISION
2-20
ERUI PMEbIT MANUFACTURING DIU1
1
SALES RRANC:HES
Meltuurne
Austarc Auenue5
1
2
C)~OJS.
Sydney
Newca5.t
WC11
Bric.bane
1
1
ongung
e
Rclad
83
Er2
Er49
G142
87
BY
WELDING INDUSTRIES
,
Edwards t own , SCIIJ
429
4766 AA32493
647
61
25'
844
2655
1668
3447
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AA24155
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OF
AUSTRALIA PTY LTD
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465
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3874
ph
Facsimile
Mackay
Adel
aide
Pert
h
Launceston
G13
679
88
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863
465
51
352
361
44
861
3532
3622
7088
53822
AA32493
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AA82856
AA72936
MELDPIAT
PLEASE Et4SURE THAT THIS FOLDER REFERENCE WHEN REQUI RED.
I
C
180
I
S
S.
KEPT
IN
A
SAFE
PLACE
FOR
REAlD'Y
CONTENT8
SECT1
ON
1
2
3
4
c
J
6
7 8
9
F1 GUHE 1
2
3
4
5
d
7
E
P
18
11
PAGE
l
1
2
6
8
9
18
12
15
PAGE
CONTENTS SFEC
I
F I CAT
RECE
IO1
I
NSTALLAT
NG
I
I
ON
ON$
CONTROLS
WELDING SET-UP
GENERAL MAINTENANCE
TROUBLE SHClOTING
CONTROL PRINTED CIRCUIT SFARE PARTS LISTS
BOARDS
. .
,
,..
..
.
A'
L
SPEC1
F1
CAT1
WELDMATIC
ONS
188s
MANUAL
PAGE
1
1.1
-
1.2
TECHNI
-
Welding Output
-
-
-
-
Wire Speed Range
-
-
STANDARD
-
AM132-8/'? Nine
-
AM132-0/15
CkL
Output Duty
Over
I
Encl
Cycle.
1
clad
n5.u 1 at i or1
osure
us1
tagE.
Prcttec
PACKAGE
t
i
Metre
Fifteen
or1
Metre
48
-
1
88
~ITI~
21
-
38
VDC
1
E;@
ArrIF'E.,
188
Amps,
Recti
G1
C:~~E.C.
Dr
Accec.c.ory
f
i
er
-
16
metrew'mi n
'H''
i
p-proo-f
Accessory
C.
58% 35X
Therrrlcts.tats (Thermal
-
148
C;
Lead
Lead
rise
Kit
Ki
at
t
48
j
C
amtlient
-
2.
RECEIVING
In genera.1
of installation
t
cl
the
i
t
ems
If
any
We1 ding
damage haE. clccurred in
Industries
it
en
is
a
before
c
1
osed.
cl+
good practice
unpackinq
Austral
ia
to
mc~ue
Use
transit irrlrrlediatelr nutif).
or
their authoriE.ed agent.
the equipmerlt
care
in order
to
the site
to
avoid damage
3.
I
NSTALLAT
3.1
MACHINE LOCATION
WELDMATIC
I
ON
180s
MANUAL
PAGE
2
Where
consideration should
-
Availahility
-
Accessibility for wire and
-
The
cclcll inq air through
-
Prcltection from wind and driven
poc,c.ittle,
of
gas
bottles, and
power-source
in
chctclsirrg
be
given
electrical and c.hielding
the
must
the
open doorway can rec.ul coverage, which
ca.n
unauoidat~le, consideration should
a
weldir~g screens of
from
the
-
Airhorne dust particles 1~1i1l
equipment,
the
we1
ding power-~.c~urce can
machine should
particularly
tluildup can often
a1
1
times endeavour
cl+
contaminated
particles such
MA1NTENANC:E SECT I ON
suitable material.
tle
pc1s.i
tle
the
to
air,
as
of
a
site for any welding
tu
the
replacement
for
any
be
posi
ticsned
machine is
rain
t
in
degradation of
cause weld porosity.
tioned with
that
position
with forced air cool ing and excessive
cause
of
the
particularly
from
t
h
grinding operations.
i
c.
Manual
pOWer-50UrCe,
fcll lowing points:-
gas
c.upp1iec..
of
consumables, i.e. welding
future rrlainterlarlce requirements.
so
that
not
impeded.
-
Breezes
the
tle
given tcl
The
a1
5.0
cause simi
this
always
in
accumulate in uented
premature
machine to minimise
that
,
plage
}
the
free f
bluwing through
weld c.hie1dinq
If
such
the
use
nut+low
lar
of
prcatl1
mind.
machine failure.
contairrirlq
1
a
site
of portat~le
cooling
ems.,
the
metal
i
see
ow
of
an
gas
is
air
and
Ai:
inta.ke
1
ic
a1
5.0
-
3.2
SUITABLE
The
WELDtIATIC:
hertz
MAINS
1861s.
electrical mainc.
VOLTAGES
is designed
power
for
connectic~n tu
suppl>’.
a
s.ingle
phase!
58
L
3.3
CONNECTION
WELDMATIC
TA
ELECTRICAL
188s
MAINS
MANUAL
POWER
PAGE
SUPPLY
3
The
When
recommended Supply Fuse Rating
making
local codes
seCurE.1
The
y
bins.
made.
equivalent
Tighten
the
sufficient '5.1ack' in
terminated
is
corrnec tion
are
to
adhered
the
t4achine Supply terminal
to,
and
Power Supply Cab1 e c-.hould
size
wirec.
cattle
two
s.crews
are
as
not
that
the
fitted.
of
Supply
the
in tension.
28
Amps.
that
the
only
EARTH
be
internal cable clamp 1es.ving
Flexible
Cat11e
s,
connection
replaced
C.UC~
ensure
W1
that
th
that
is
an
the
F1
GURE
1.
CONNECT1
ON
SUPPLY
FLEX1
BLE
U
L
CABLE
””
3.4
CABLE
AI
1
welding current
in
figure
contained in
AND
3.
WELDMATIC:
HOSE
The
the
r.tar1dar.d
186s
MANUAL
CONNECTIONS
I
control and shielding
complete
set
accec-.sory
PAGE
4
ac.
of necessary cablez. and
kit
AP1132.
connectionc.
are
hoses
c.hown
are
-SHIELDING
The
used
the
hose
panel
-CONTROL
Engage
on
the
accessory
to
gas
is.
to
the
wirefeeder
-I.IELD I NG
G.t.1.k.
and
the
sc~urce
the
mire
GAS
join
nipple
the
power source front
CURRENT
we1
is.
drive rnechanic,m.
the
used
the
rear
CABLE,
’Wirefeeder” contrcll
ding
workp
connected to
E.ecure1 y bo1 ted
HOSES.
ki
t
ouput
on
the
to
make
of
are
CABLES.
is
i
ece
ta
CctntainC-. two
of
the
shielding
rear
the
the
panel
gas
connection
L521
wirefeeder.
panel
c.huwn
conducted with
neqat
i
the
ve.
welding
Ensure
thi 5 adaptor.
gas.
hoses.
cl+
the
catlle plug into
The
con
the
adjacent diagram,
the
el
The
posi
gun
via
that
the
T
h
E
4-1
or
gas
regulatclr.
Power-~.c~urce.
from
the
~CIOJ~~
the
trcll
ec trclde
tive ou
cab1 e connectiuns
polari
tpu
t
an
adaptctr mounted
positive
eldin ding
t
er
1
en
-
flowmeter
The
source front
marked
ty
pc1c.i
of
the
cat11
y
t
h
c.ec
und
socket
for
tive,
power
with
e
i
E.
to
iz,
The
negatiue output of
catlle incclrporating
puwer
source
by
inserting
the
the
work
power source is connected
clamp. Bckth leads.
the
plug into it5 appropriate socket.
to
the
c.ecured
welding
a.t
the
WELDMATIC
188s
MANUAL
PAGE
5
WELDMATIC
l
J
180s
W21-2WlRE
"
I I
FEEDER
""
CONTROL
CONNECTIONS
CP1
POWER
BIMK
BADWN
OR
bR
SOU=
WHITE
RfD
CONTROL
_.
-
F1
GURE
2.
CABLE
AND
HOSE
CONNECT1
ONS
L
I
WELDMATIC
QFF
0
ON
188s
MANUAL
PAGE
6
dig
tN/t
H
E
0
SPnr
TtME
WELDMATI
C
188s
MANUAL
PAGE
7
-INCH/PURGE
This
Moving the inch/purye switch
feeding the wire into the gun cable 5ystem. during inch contra1
is. a dual +unction switch.
.
-L‘OtTACiE
Output
-W
I
HE
v01
SPEED
,SW
tage
SWITCH:
is
ITCH
:
wil
C:CNTHOL
determined
1
increase with increasing position
:
tly
up
initiateE. the wire
the settiny
The
cl+
the ’IJire-c,peed”
feed
wire feed
numbers.
mcltor,
speed
-SPOT
-I
NTERVAL
TI
ME
CONTROL
CONTROL
:
:
-
5.
MELDING
5.1
ELECTRODE W1 RE/SHI ELDING
-
Se1
ec
t
wirefeeder.
drive
-
Conrrect to
rollers
appropriate
SET-UP
the
Ensure
-
the
to
WELDMATIC
180s
MANUAL PAGE
desired consumabl
5ee
that
page
the
23.
wirefeeder ic. fitted with
gac. regulator/fl owmeter,
the
welding consumable.
e
el
ectrode
8
wire and
a
supply
f
i
t
to
the
cctrrect
of c.hielding
the
yas
MI
STAINLESS STEEL
SI
-
Set the gas floo~ rate
the
range
NOTE:- Excessive
the
L6,
L1
of
we1
STEEL
CON
18
ding
BRONZE
to
15
gas flow
resul
to
suit
1
itres./min.
is
t.
TYFICAL SHIELDING
ARGON
ARGON
the
welding procedure,
or
/'
coc.tly and
GAS
HEL I UP1 P1 I XTURES
usually
may
adversely affect
in
r
30440~
WIRE SPEED
DIAL
6mm
8mm
9mm
1.2mm
SETTINGS GIVEN USE
SETTING,
F1
SETTING
VOLTS
SPEED
WIRE
SETTING
DIAL
VOLTS
WIRE SPEED
DIAL SETTING
VOLTS
WlRE SPEED
DIAL SETTING
VOLTS
THIS CHART AS A PRELIMINARY SETTING GUIDE. TO'TUNE'EACH WELD
ADJUST
GURE
4.
1-4 2.0
135558
I
I I
FOR
C02 SHIELDING GAS.-FLOW RATE 8-1OLITRES/MINlJTE.
WIRE
SPEED
WELD SETTING CHART
WELDING
50,604
2.8
1
1.3
l23346810
.7
.8
l234457810
ONLY
CURRENT(Arnps)
70,85,100,120#140#t60,iB
3.6
4.0
7.0
1.6
1.9
2.2
3.3
1 1.2
1.8
2.2 3
1 1.2 56789
4.8
1.5
6.8
3.8
1.8
6
2.5
7.1
POOR
-
Check
ouer-tightened, drive rcll
lers
the
driue roll
&l
5.0
that
A1
1
AREA
ARC
WELDING
probl
-
Check
use
and
Ensure
The
welding shielding
WELDING
for gclud wire feed conditions,
are
the
pressure
that
the
of
WHICH
emE.
gas
the
welding
the
ahue
HAS
and, therefclrr, ~.hc~uld
occur.
that
for
there
nuzzle
nozzle
gun cab1
the
correct
are
must
to
gas.
WELDMATIC
RESULT
rollers
correct
size
is
e
1
iner
tip
is
in
can cause erratic
THE
HIGHEST
shieldinq
gas
flow
no
gas
1
eakc.,
be
free
ensure
that
18Bs
adequate for consistent .feeding.
good condition and nut excessively
MANUAL
not clcqged
and
PROBABILITY
gas.
type
i
5.
of ccfrrec
ic. cc~rrect for
rate
as.
from
spatter
atmctspheric gas.
to
el
ding
be
at
the welding torch nozzle.
this
wi
OF
the fir5.t pclint checked
PAGE
i
.e.
suit
10
spr~ol
with
the
t
r.ire
cclrrdi
FAILURE
dust build-up, driue
welding wire5 and
and not bl clcked and
t
ions and
the
1
l
resul
and firmly attached
t
is
nc~t dra,wn intct
holder
brake
IT
IN
ALL
electrode wire
in
we1
GAS
d
pclrosi
not
Chec
worn.
IS
THE
METAL
whef-1
t;~,.
to
the the
k
in
-
Estatll
which i
wh
i
1
loss of arc “direction’.
-
l.pJctr
galuanising, paint,
we1
di rig arc condition occur, surface cleaning n
ec
esc,ar
ish
that
5
too 1 ow wi
e
an
arc
k
-p
i ece
Y
.
the
1 1
uul
tage too high
5.u
r
f
ac e
rec.ul t in9 in
arc
{JOI
tage
cause excec.c,i
Arc
c
or
length is proportional
on
tam
oxide
a
is
may
i
na
layers
poor.
correct
{le
crack1
resul
t
i
on
we1
c?f
by
d
t
i
can
the
1
y
5.et
e
I
shorting
rl
el
wa
t
severely
deposi
work
An
arc
I,JCI~
and
d undercut and/or
to
arc
er
t
.
cti
disturb1 the Shou 1 d
piece
1
spat
I,JOI
,
wi1
tage
ter
tage.
grease,
t
h
1
,
i
S
be
,
7.2
NO
WELDING
WELDMATIC
CURRENT
180s
MANUAL
PAGE
i
l
gas
is
Supply
the fan
of
panel,
of
val
assembly,
checks possible
QUALIFIED
-
Check
Source,
-
Check continuity
work
-
Inspect,
Power
(3AGi)
-
Check operation
motor
replace
-
If
condition electronic control circuits of the
In
in-formation contained in the fc11 1c11~~inq Section.
that
i.e.,
clamp
Source front
and
runs,
the
the
Mains
and gun cable connections.
and replace
correct current
and gun cable
forgoing
it
this instance,
that
is.
auailatlle
is
running and
the
welding current circuit, i.e.y
if necessary fuses on
Replace fuses only
rating.
the welding gun cwitch, i.e.
ue
CIFIerates
haue
that
SERVICE
when-
and
tleerl
a.
WELDMATIC
re-test.
made
failure
PERSONNEL
at
the
the indicator
gun
sui
.md
WELDMATIC
the
with
tch
not revealed
has
1538s
should
WELDMATIC
the
correct
c
1
osed.
occurred in
.
refer
188s
light
work
,
wir~?-t”eed
I
the
ts
Power
is
lead,
i86zs
type
f
not
Saul
the
on.
t
the
-
8,
CONTROL
-
8.2
WIRE-FEED
WELDMATIC
PRINTED
CONTROL
180s
CIRCUIT
BOARD
MANUAL
BOARDS
W1A-21
PAGE
12
The
W14
PCB W16-ZI
f
uric
t
i
onc.
-
Closed-lc~ap
-
Run,
-
Driver
-
"Burn-back"
It
a1
and
5.0
pravides
wire-feeder
:
braking
for
the
in
conjunction
speed
of
cclntrol
control
gas
c.ct1enc~id valve.
the
electrode
the
el
'Options'
with
fur
the
of
the
wire
wire
ec
trieal E.cIcket5.
3OY.
such
AC SUPPLY
a5
:
PCB
wire
at
Wid-28
feed
feed
end
to
perfctrmc,
motclr.
mator.
af
weld.
a1
1
c~w
the
pctst-f i t
UTILUX
fol
of
HIPP6
lclwinq
vdricIu5
. .
F1
.
.
. . .
GURE
7.
-
W1
RE-FEEDER
U.
MOTHER
BOARD
pcS
OUERLAY
W1
6-21
c
WELDMATIC
18Gis
MANUAL
PAGE
13
0
;I
3
00
c5
cb
U
FIGURE
3
WIRE-FEEDER
SPEED
BOARD
PCB
OIJERLAY
W1
6-20
Y
WELDMATIC
i805
MANUAL
PAGE
14
This
Welding
>l-1-1-1-
tmard
and
detects
Cycle
welding
Arc
current
operation.
initiation
and
times
the
k
Spat
WELDMATIC
eSPAREEm3LL.i
9.1
POWER
SOURCE ASSEMBLY
180s
MANUAL
PAGE
15
ITEM
1
2
3
4
5
L
7
8
8.1
9
16
11
12
13
14
15
16
17 15‘
17
28
21
22
cc
Lb
24
25
26
27
28
2
P
38
38
,l
31
31
.1
31.2
31.3
31.10
32
33
34
35
36
37
38
37
48
41
3
PART CP17-29
CP17-25
CP17-28
CP17-11
Wid-21
W1
Ard
W1
Ar113-14
CP1
CPi7-6/16
CPl7-6/11
W
1 CP15-61/4 CP17-B/14
CP1
W
I
rd
W1
k15-16/19
CP28-
W
1
-33/
W1
1-1
W1
7-1
TC262
TC262N C:P17-1 CPL 7-36
CP17-14
CP17-16
CP17-17
CP17-6/38
w1-19
CPf
Id1
7-8/‘1
IJ 1 7-6,’
W1
1-82/15
Am
AA35
(MC1 4-6/18
<MC
CP17-8/36
GP
l
CP1
W1
1-8/13
AM97
CP17-@1/4i
3
6-20
128-50
1-28
7-8/Y
-23
5-6/14 4
4
1
-8/‘i
6
1
4/‘
1
1
4
1
7-8/31
1
1
3
m-3
1
4-8~9
7-8/37
7-8/38
1
DESCRIPTION BASE ASSEMBLY
TRANSFORMER ASSEMBLY
LIMITING
RECTI F1 ER ASSEMBLY WIRE-FEEDER MOTHER W1
RE-FEEDER SPEED SPOT TIMER/’CYOLE ARC CURRENT RELAY REED RELAY CONTROL TRANSFORMER 248-31VF 226UA CONTACTOR
VOLTAGE SWITCH
FUSE HOLDER
FAN
BLADE
MOTOR
FAN CONTROL PLUG
TYPE bIO./SERIAL
KNOB
KNOB
8
W1
1
CAPAC
HANDLE
PlOUNT
PCB
GAS
VALVE
HOSE
GAS
VALVE CONNECT1
GAS
HOSE NIPPLE
NUT
FRONT PANEL
BACK
BAFFLE
TOP COUER SI DE PANEL
LOOM ASSEMBLY OFF/ON
LOOM
I
INCH/PURGE SWITCH
SPOT/CYCLE
GAS
OUTPUT TERtlINAL ASSEMBLY CABLE ENTRY BUSH CABLE CASTOR WHEELS FIXED WHEELS HOSE PLUG SUPPLY FLEX
AssErIBw
rm
I
CATOR
RE
SPEED
HOSE
I
BOTTLE CRADLE
BC
WELDING INDUCTANCE ASSEMBLY
2400 56 Hz
-
bJ1
RE
SPEED
-
SP@T/’CYCLE
I
NGS
GARB
PANEL
BC
COWONENT
SWITCH
L
I
GHT
POTENTI SELECTION SI*!ITCH
ENTRY
TOR
BUSH
CO1
-
-
ASSEMBLY
BOARD
BOARD
L
NO.
NAMEPLATE
ON
MOUNT
POWER SOURCE
WI
RE
FEEDER
OtIETER
PCB
PCE
BOARD
I
NG
PCB
PANEL
.
WELDMATIC
188s
MANUAL
PAGE
16
WELDMATI
9.3
TWO-ROLL-DRIVE ASSEMBLY
C
118s
MANUAL PAGE
l7
ITEM# PART
i
2
3
4
5
6
7
W2-44/1 w2-44/2 b52-44/25
W2-17
8
9
18
11
12
13
14
W2-44/&.
W2-44/'13
w2-44/7
W2-44/8
1';
16 17
18
15'
26
21
22
23
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MANUAL
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WELDMATIC
188s
MANUAL
PAGE 26
I
FIGURE
14.
WELDMATIC
188s
CIRCUIT DIAGRAM
SAFE
PRACTICES
IN
USING
WELDING
EQUIPMENT
Produced by Welding Industries of Australia Pty. Ltd.
in
the
interests
of improving 0perato.r safety. These notes should be considered only as a basic guide to Safe Working Habits.
is
available from the Standards Association of Australia, also various State
A
full
list
of Standards pertaining to industry
Electricity Authorities, Departments of Labour and Industry or Mines Depart­ment and other Local
Health
or Safety Inspection Authorities may have
additional requirements.
1.
A
neat uncluttered work area makes for safe working habits.
2.
Burn Prevention
The welding arc
is
intense and visibly bright.
Its
radiation can damage eyes, penetrate lightweight clothing, reflect from light-coloured surfaces, and burn the skin and eyes. Skin burns resemble acute sunburn, those from gas-shielded arcs are
Wear protective clothing
more
severe and painful.
-
leather (or asbestos) gauntlet gloves, hat, and safety-toe boots. Button shirt collar and pocket flaps, and wear cuffless trousers to avoid entry of sparks and slag.
NEVER
Wear
appropriate filter lenses
is
LOOK
helmet with safety goggles
AT
AN
ARC
WITHOUT
or
PROTECTION.
or
glasses with side shields underneath,
plates (protected by clear cover glass). This
a MUST for welding or cutting, (and chipping) to protect the eyes from radiant energy and flying metal. Replace cover glass when broken, pitted,or spattered.
__
-
Avoid electrode
Ear plugs should be worn when welding in overhead positions space.
oily
or greasy clothing.
stubs
A
hard hat should be worn when others work overhead.
and workpieces should never he handled without gloves.
A
spark
may
ignite them. Hot metal such as
or
in a confined
Flammable hair preparations should not be used by persons intending to weld
or
cut.
3.
Toxic Fume Prevention
Adequate ventilation
is
essential. Severe discomfort, illness or death can
result from fumes, vapors, heat, or oxygen enrichment or depletion that welding
(or
cutting) may produce. Prevent them with adequate ventilation. NEVER
ventilate with oxygen.
Lead, cadium, zinc, mercury, and beryllium bearing and
welded
local exhaust ventilation the operator
(or
cut) may produce harmful concentrations of toxic fumes. Adequate
must
be used, or each person in the area as well as
must
wear an air-supplied respirator. For beryllium, both must
be used. Metals coated with or containing materials that
is
not be heated unless coating
removed from the work surface, the area
similar
emit
materials when
fumes should
well ventilated, or the operator wears an air-supplied respirator.
Work
a confined space only while
it
is
being ventilated and, if necessary,
in
while wearing air-supplied respirator.
is
Vapors from chlorinated solvents can be decomposed
flame) to form PHOSGENE, a highly toxic gas, and
products. The ultra-violet (radiant) energy of the arc can
trichlorethylene and perchlorethylene vapors to
or cut where solvent vapors can be drawn into the welding
lung'
form
by
the heat of the arc (or and eye irritating
also
phosgene.
or
DO
cutting atmosphere
decompose
not
WELD
or where the radiant energy can penetrate to atmospheres containing even minute amounts of trichlorethylene or percholorethylene.
4.
Fire and Explosion Prevention
of
Causes ing sparks, hot slag, or heated material; misuse
fire and explosion are:- Combustibles reached by the arc, flame, fly-
of
compressed gases and cylin-
ders; and short circuits.
Be aware that flying sparks or falling slag can pass through cracks, along pipes, through windows or doors, and through wall
floor openings, out
of
sight
ox
the goggled operator. Sparks and slag can fly 10 metres.
To
prevent fires and explosions:- Keep equipment clean and operable, free of
oil, grease, and
(in
electrical parts)
of
metallic particles that can cause short
circuits.
of
If combustibles
are
in
area, do
NOT
weld or cut. Move the work
if
practicable, to an area free of combustibles. Avoid paint spray rooms, dip tanks, storage areas, 10 metres away out
ventilators.
If
the work can not be moved, move combustibles at least
of
reach of sparks and heat; or protect against ignition with
suitable and snug-fitting fire-resistant covers or shields.
Walls touching combustibles on opposite sides sbould not be welded on (or cut). Walls,ceilings, and floor near work should be protected by heat-resistant covers or shields. Fire watcher
during and for some time after welding or cutting
(1)
(11)
(111)
combustibles (including building construction) are within combustibles are further than
openings (concealed
must
be standing by with suitable fire extinguishing equipment
if:
LO
metres.
10
metres but can be ignited by sparks.
or
visible) in
floors
or
walls within
10
metres
may expose combustibles to sparks.
(1V)
After
-_.'
An
heated, as described includes:
combustibles adjacent to
can be ignited by radiant
work
is
done, check that area
walls,
ox
conducted heat.
is
ceilings, roofs, or metal partitions
free of sparks, glowing
embers,
empty Container that hel-d combustibles, or can produce- flamable vapors when
must
never be welded on or cut,
in
AS.1674-1974, the S.A.A. Cutting and Welding Safety Code. This
a
thorough steam
or
caustic cleaning (or a solvent or water washing,
unless
container has first been cleaned
depending on the combustible's solubility) followed by'purging and inerting with nitrogen
AS.1674-1974. Water-filling
or
carbon dioxide, and using protective equipment
just
below working level may substitute for inerting.
as
recommended in
and flames.
Hollow castings or containers
must
be vented before welding or cutting. They. can explode. Never weld or cut where the air may contain flammable dust, gas, or Liquid vapors such as petrol).
5.
Shock Prevention
Exposed conductors or other bare metal in the welding circuit, or ungrounded electrically alive equipment can fatally shock ductor. Ensure that the machine
is
correctly connected and earthed. If unsure
have machine installed by a qualified electrician.
regularly inspect condition
or
replace damaged leads.
of
trailing power leads and connecting plugs. Repair
a
person whose body becomes a con-
On
mobile or portable equipment,
6. Electrode Holders and Connectors Fully insulated electrode holders should be used.
screws. Fully insulated lock-type connectors should be used
Do
not use holders
with
to
join welding cable
lengths.
7.
Terminals
of
Texminals and other exposed parts
electrical
units
should have insulated knobs
covers secured before operation.
protruding
or
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