17 |
| TROUBLESHOOTING | 17 |
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| Observe all Safety Guidelines detailed throughout this manual | |||
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| PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
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| (SYMPTOMS) | MISADJUSTMENTS(S) | COURSE OF ACTION |
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TIG WELDING PROBLEMS
Black areas along weld bead. | 1. | Clean any oily or organic conta- | |
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| mination from the work piece. | |
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| When welding aluminum, clean | |
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| oxide layer with a stainless steel | |
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| brush. | |
| 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 insuffi- | |
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| cient. Increase gas flow; reduce | |
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| tungsten stickout beyond gas | |
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| cup. | |
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Weak high frequency - machine has | 1. | Check for poor connections in | |
normal welding output. |
| the welding circuit. | |
| 2. | Gas shielding may be insuffi- | |
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| cient. Increase gas flow; reduce | |
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| tungsten stickout beyond gas | |
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| 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 (0.015”) | |
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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. |
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Machine has normal open circuit | 2. | The current control may be set | |
voltage (refer to Technical | |||
| too low. | ||
Specifications in the Installation | 3. | The tungsten electrode may be | |
Chapter). | |||
| too large for the process. | ||
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| 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. | |
| 5. | If in 4 Step TIG mode the | |
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| Start/Crater current control may | |
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| be set to low. | |
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Contact your Local Lincoln Authorized Field Service Facility for technical
troubleshooting assistance.
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.
