TROUBLESHOOTING | ||
Observe all Safety Guidelines detailed throughout this manual | ||
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PROBLEMS | POSSIBLE | RECOMMENDED |
(SYMPTOMS) | CAUSE | COURSE OF ACTION |
TIG MODE PROBLEMS
Black areas along weld bead. | 1. Clean any oily or organic contam- | |
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| ination from the work piece. |
| 2. | Tungsten electrode may be cont- |
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| aminated. Replace or sharpen. |
| 3. | Check for contaminated gas or |
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| leaks in the gas line, torch, or |
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| connections. |
| 4. | Gas shielding may be insufficient. |
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| Increase gas flow; reduce tung- |
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| sten stickout beyond gas cup. |
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Weak high frequency - machine has | 1. Check for poor connections in the | |
normal welding output. |
| welding circuit. |
| 2. | Gas shielding may be insufficient. |
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| Increase gas flow; reduce tung- |
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| sten stickout beyond gas cup. |
| 3. | Check for work and electrode |
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| cables in poor condition allowing |
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| high frequency to “Leak Off”. |
| 4. | Keep cables as short as possible. |
| 5. | Check Spark Gap operation and |
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| setting (0.020”). |
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High frequency “spark” is present at | 1. The tungsten electrode may be | |
tungsten electrode, but operator is |
| contaminated. Replace or sharp- |
unable to establish a welding arc. |
| en. |
Machine has normal open circuit |
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voltage (refer to Technical | 2. The current control may be set | |
Specifications in the Installation |
| too low. |
Chapter). |
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| 3. | The tungsten electrode may be |
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| too large for the process. |
| 4. | If a helium blend is used as a |
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| shielding gas, then reduce the |
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| percentage of helium. |
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If all recommended possible areas of misadjustment have been checked and the problem persists, Contact your local Lincoln Authorized Field Service Facility.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
