Specifications

SECTION
6
-
DATA
CHARTS
GENERAL
The two
basic
types
of
metal
transfer
are
spray
and short
circuit.
Spray
transfer
comprises
a
steady
stream
of
fine
droplets
moving
across
a
physical
space
from
the electrode
to
the
workpiece.
The
short
circuit
welding
technique
transfers metal
from
the electrode
to the
workpiece
on
contact
only.
The electrode
physically
touches the
work
and,
since it is
electrically
energized,
short
circuits the
welding
circuit.
The
short
circuiting
action
occurs
many
times
per
second.
POWER SOURCE
REQUIREMENTS
Power
sources
required
with the
spray
transfer
technique
of
gas
metal-
arc
welding
is the
constant
potential
type.
The constant
potential
power
source
may
or
may
not
have
some
method
of
slope
control.
The short
circuit method
of
metal
transfer
requires
a
constant
potential
class
power
source
with
some
method
of
slope
control.
Slope
settings
may
be
fixed
or
adjustable
by
tapping
a
reactor either
mechanically
or
electrically.
MILD
STEEL
AND
LOW ALLOY STEEL
The
settings
provided
in
Table 6-1
are
applicable
to most
weldable
steels.
Some
modifications
will be made
for
any
specific
application,
of
course,
because
the
ranges
are
necessarily
broad.
They
will
con
stitute
a
basis
for
setting
a
welding
condition.
TABLE
6-1.
Short
Circuit
Transfer
-
Mild And Low
Alloy
Steels
Electrode
Diameter
Amperage
Range
dcrp
Load
Voltage
Slope
Turns
Power
Source
0.030
70130 1521
6
~
250
Amp
CP
Welding
Machine
0.035
80190 1622
6
250
Amp
CP
Welding
Machine
0.045
100225
1722
6
250
Amp
CP
Welding
Machine
APPROXIMATE
POWER SOURCE
SETTINGS
The
settings
shown
in
Table 61
are
predicated
on
using
CO2
shield
ing
gas
for
mild
steel and
ArgonCO2
for
low
alloy
steel.
TABLE
6-2.
Spray
Transfer
-
Mild
And
Low
Alloy
Steels
Electrode
Diameter
Amperage Range
dcrp
Load
Voltage
Slope
Turns
Power
Source
0.030
150265 2428
03
CP
Type
0.035
175290 2428
03
CP
Type
0.045
200315
2430 03
CP
Type
1/16
275500
2432
14 CPType
3/32
350600 2433
14
CP
Type
APPROXIMATE POWER
SOURCE
SETTINGS
The
settings
In
Table
62
are
predicated
on
the
use
of
oxygen
shielding
gas
for
Mild
and
Low
Alloy
Steels.
Argon-S
pct.
OM-1234
Page
11