STANDARD
UNIT
The construction of thestandard package planthas been designed
forinstallation and operating
in
a
wide variety of applications,
such
ashighproductionfactories and generalfabrication shops.
"WELDMATIC"
Plantsconsist of threebasic
units:-
l,
ConstantPotentialRectifier Power Source.
2.
Semi-Automatic Wire Feeder.
3,
Welding
Gun
and Cable Assembly.
Separateoperating and maintenance instructionsare provided
forthewirefeeder andgun cables.
1.
-
POWER
SOURCE
-
FEATURES
The standard
C.P.
rectifier power source
is
housed
in
a
drip-
proof enclosure.
Lifting
lugs
areprovidedforcranetrans-
portation. For
units
with
wheelmounting foursolidrubber
tyredwheelsareprovided:the two front wheels aresteerable
permittingeasy movement
in
restrictedfloorspace.
A
push
bar
is
provided
on
the
front
of the machine and
a
gascylinder
carrier
with
a supportbracket and chain
at
therear.
A
110
voltplugsocket is located
on
therear panel
for
connection
of gaspreheater when welding
with
C02
gasshield. Located
on
thefrontpanelare
a
coarsevoltageselectionswitch,fine
voltageselectionswitch, power
ON/OFF
switch,controlfuses,
wirefeeder
plug
socket and rectifier power outletsockets.
2.
CONSTRUCTION
Thepower source
is
a ConstantPotentialSilicon Diode Rectif-
ier
B.C.
Welder,
with
a threephasetransformer and
a
three
phase rectifierbridge. Connected
in
the
outputcircuit
is
an
inductance
unit
providingthe"inductance"ordegree of slope
necessaryforvariousweldingcurrents.Cooling
of
thesili-
con diodes,transformerwindings and inductance
unit
isby a
singlephaseaxialfan. Thepower source
is
protectedagainst
fanfailure and overheating
by
thermostats mountedon diode
heatsinks.
3.
WELDING
PROCESS
Gas metalarcwelding
within
thecapacity
of
the power source
can be carried
out
with
tke
followingequipment:-
a) Semi-automatic wirefeeder model
W14.
b)
Semi-automatic wirefeeder
with
spottimer
W14-20.
c) "Hobart"spool gun welding
unit
model
SP9
with
CV2
d)
"Mini-mig" push and
pull
gun
and control.
controller.
4.
WELDING
CAPACITY
Power SourceCapacity
is
asfollows:-
600
Amps,42 volts,
100%
duty
cycle.
