A-3
INSTALLATION
AutoDrive™ 4R220
A-3
COAXIAL WELD CABLE
Coaxial welding cables are specially designed welding
cables for STT™ and pulse welding. Coaxial weld cables
feature low inductance, allowing fast changes in the weld
current. Regular cables have a higher inductance which
may distort the STT™ waveshape. Inductance becomes
more severe as the weld cables become longer.
Coaxial weld cables are recommended for STT™ weld-
ing, especially when the total weld cable length (elec-
trode cable + work cable) exceeds 50 feet (7.6m). See
Table A.2.
A coaxial weld cable is constructed with multiple small
leads wrapped around one large lead. The large inner
lead connects to the electrode stud on the power source
and the electrode connection on the wire feeder. The
small leads combine together to form the work lead, one
end attached to the power source and the other end to
the work piece.
To install:
1. Turn the input power off at the welding power source.
2. Connect one end of the center lead to the power
source electrode connection, and the other end to the
wire feeder electrode connection.
3. Connect the outer lead bundle to the power source
work connection, and the other end to the work piece.
Minimize the length of any work lead extension for
best results.
4. Insulate all connections.
Electrode
ork
Amperes
250
300
350
Duty
Cycle
100%
60%
60%
0 to 25 Ft.
1
1
1/0
25 to 50 Ft.
1
1
1/0
50 to 75 Ft.
1
1
--
75 to 100 Ft.
1
1/0
--
COAXIAL CABLE LENGTH
RECOMMENDED CABLE SIZES (RUBBER COVERED COPPER - RATED 75°C)**
Electrode
Work
Electrode
Work
Power Source
Coaxial Weld Cable
Wire Feeder
TABLE A.2
** Tabled values are for operation at ambient temperatures of 104°F(40°C) and below.
Applications above 104°F(40°C) may require cables larger than recommended, or cables rated
higher than 167°F(75°C).
