20
Troubleshooting
Fault | Probable cause | Suggested remedy | ||
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Excessive blade | 1. | Material loose in vise. | 1. | Clamp work securely. |
breakage | 2. | Incorrect speed or feed. | 2. | Check Machinist’s Handbook for |
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| speed/feed appropriate for the |
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| material being cut. |
| 3. | Teeth too coarse for material. | 3. | Check Machinist’s Handbook for |
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| recommended blade type. |
| 4. | Incorrect blade tension. | 4. | Adjust blade tension to the point |
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| where the blade just does not slip |
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| on the wheel. |
| 5. | Saw blade is in contact with | 5. | Start the motor before placing the |
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| workpiece before the saw is |
| saw on the workpiece. |
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| started. |
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| 6. | Blade rubs on the wheel flange. | 6. | Adjust blade tracking. |
| 7. | Misaligned guides. | 7. | Adjust guides. |
| 8. | Cracking at weld. | 8. | Longer annealing cycle. |
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Premature blade | 1. | Blade teeth too coarse. | 1. | Use a finer tooth blade. |
dulling | 2. | Blade speed too high. | 2. | Try a lower blade speed. |
| 3. | Inadequate feed pressure. | 3. | Decrease spring tension. |
| 4. | Hard spots in workpiece or scale | 4. | Increase feed pressure (hard |
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| on/in workpiece. |
| spots). Reduce speed, increase |
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| feed pressure (scale). |
| 5. | Work hardening of material | 5. | Increase feed pressure by |
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| (especially stainless steel). |
| reducing spring tension. |
| 6. | Insufficient blade tension. | 6. | Increase tension to proper level. |
| 7. | Operating saw without pressure | 7. | Do not run blade at idle in/on |
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| on workpiece. |
| material. |
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Bad cuts | 1. | Workpiece not square with blade. | 1. | Adjust vise so it is square with the |
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| blade. (Always clamp work tightly | |
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| in vise.) |
| 2. | Feed pressure too fast. | 2. | Decrease pressure. |
| 3. | Guide bearings not adjusted | 3. | Adjust guide bearing clearance to |
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| properly. |
| 0.001 inch (0.002 inch maximum). |
| 4. | Inadequate blade tension. | 4. | Gradually increase blade tension. |
| 5. | Span between the two blade | 5. | Move blade guide bar closer to |
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| guides too wide. |
| work. |
| 6. | Dull blade. | 6. | Replace blade. |
| 7. | Incorrect blade speed. | 7. | Check blade speed |
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| (see Figure 3). |
| 8. | Blade guide assembly is loose. | 8. | Tighten blade guide assembly. |
| 9. | Blade guide bearing assembly | 9. | Tighten blade guide bearing |
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| loose. |
| assembly. |
| 10. | Blade track too far away from | 10. | Adjust blade tracking. |
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| wheel flanges. | 11. | Replace worn bearing. |
| 11. | Guide bearing worn. | ||
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Bad cuts (rough) | 1. | Blade speed too high for feed | 1. | Reduce blade speed and feed |
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| pressure. |
| pressure. |
| 2. | Blade is too coarse. | 2. | Replace with finer blade. |
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