INSTALLATION | ||
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CAUTION
Excessive voltage drops caused by poor work piece connections often result in unsatisfactory welding performance.
COAxIAL WELD CAbLES
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™ welding, especially when the total weld cable length (electrode cable + work cable) exceeds 50 feet (7.6m)
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 feed- er. 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.
ELECTRODE
WORK
To install: (See Figure A.2)
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.
TAbLE A.2
RECOMMENDED CAbLE SIzES (RUbbER COVERED COPPER - RATED 75°C)**
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| COAxIAL CAbLE LENGTH |
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| Percent |
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| Duty |
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| 0 to 25 Ft. |
| 25 to 50Ft. |
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| 50 to 75 Ft. |
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| 75 to 100 Ft. |
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| Cycle |
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| 0 to 8 m |
| 8 to 15 m |
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| 15 to 23 m |
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| 23 to 31 m |
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| 250 |
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| 100 |
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| 1 |
| 1 |
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| 1 |
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| 1 |
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| 300 |
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| 60 |
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| 1 |
| 1 |
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| 1 |
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| 1/0 |
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| 350 |
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| 60 |
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| 1/0 |
| 1/0 |
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**Tabled values are for operation at ambient temperatures of 40°C and below. Applications above 40°C may require cables larger than rec- ommended, or cables rated higher than 75°C.
POWER SOURCE |
| FIGURE A.2 |
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| WIRE FEEDER | |
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WORK ELECTRODE |
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| COAXIAL WELD CABLE | ||
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| ELECTRODE |
WORK