| TROUBLESHOOTING | ||
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| 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. |
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| 2. Tungsten electrode may be cont- | |
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| aminated. Replace or sharpen. |
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| 3. Check for contaminated gas or | |
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| leaks in the gas line, torch, or |
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| connections. |
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| 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 loose or faulty connec- | |
normal welding output. |
| tions at the torch and/or welding | |
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| cables. |
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| 2. | The gas shielding may be insuffi- |
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| cient. Increase gas flow: reduce |
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| tungsten stickout beyond the gas |
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| cup. |
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| 3. | Check spark gap operation and |
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| setting. Normal is (0.020"). Refer |
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| to Maintenance section of this |
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| report. |
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| 4. | The work and electrode cables |
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| may be in poor condition allowing |
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| the high frequency to "leak off". |
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| Use good quality cables with a |
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| high natural rubber content, such |
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| as Lincoln Stable Arc Cable. |
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| Cables should be as short as pos- |
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| sible. |
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High frequency “spark” is present at | 1. | The torch may be faulty. Check or | |
tungsten electrode, but operator is |
| replace. | |
unable to establish a welding arc. | 2. | The current control may be set too | |
Machine has normal open circuit |
| low. | |
voltage (refer to Technical | 3. | The tungsten electrode may be | |
Specifications in the Installation |
| contaminated. Replace or sharp- | |
Chapter). |
| en. | |
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| 4. | The electrode may be too large for |
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| the process. |
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| 5. | If a helium blend is being used as |
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| a shielding gas, then reduce the |
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| percentage of helium. |
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| 6. Check the welding cables for | |
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| loose or faulty connections. |
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| 7. | This may be a welding procedure |
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| problem. |
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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 Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.