Troubleshooting
Problem |
| Possible Cause |
| Remedy |
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Spindle does not turn. | 1. | Circuit breaker tripped. | 1. | Reset circuit breaker. |
| 2. | Branch circuit breaker tripped or | 2. | Reset branch circuit breaker/replace |
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| fuse blown. |
| fuse. |
| 3. | Open wire in switch circuit. | 3. | Repair open circuit. |
| 4. | Defective switch. | 4. | Repair switch. |
| 5. | Broken drive belt. | 5. | Replace drive belt. |
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Spindle noisy. | 1. | Damaged spindle bearings. | 1. | Replace bearings. |
| 2. | Worn spline. | 2. | Replace spline. |
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Drill stalls. | 1. | Worn drive belt. | 1. | Check condition of belt. Replace if |
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| glazed or slipping on pulleys. |
| 2. | Excessive feed rate for size of drill and material | 2. | Reduce feed pressure or use |
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| being drilled. |
| cutting fluid. |
| 3. | No cutting fluid or improper cutting fluid. | 3. | Use correct cutting fluid. |
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Poorly drilled holes. | 1. | Drill dull. | 1. | Sharpen drill. |
| 2. | Lack of rigidity in | 2. | Check that all |
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| tight and that |
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| head bolts are tight. |
| 3. | Speed too fast for material and drill size. | 3. | Check spindle speed recom- |
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| mendations. Reduce speed if |
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| necessary. |
| 4. | Feed too fast for material and drill size. | 4. | Reduce feed rate. |
| 5. | No or improper cutting fluid or coolant | 5. | Use cutting fluid, or change to |
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| being used. |
| proper fluid or coolant for material |
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| being drilled. |
| 6. | Improperly ground drill bit. | 6. | Check for proper angles and reliefs. |
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| Regrind to proper geometry. |
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Motor overheating. | 1. | Electrical circuit fault. | 1. | Check current draw in circuit. |
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| Make sure current draw is the |
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| same as rating on motor plate. |
| 2. | Oversize drill. | 2. | Reduce drill size. |
| 3. | Excessive feed. | 3. | Reduce feed rate. |
| 4. | No cutting fluid, or wrong fluid. | 4. | Use correct cutting fluid for the |
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| material and drill. |
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Table can not be | 1. | Lack of lubrication. | 1. | Lubricate. |
raised. |
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No speed readout. | 1. | Speed pickup out of adjustment or failed. | 1. | Adjust gap between speed pickup |
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| and post spindle pulley. If there is |
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| no readout on the speed indicator, |
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| replace the speed pickup. |
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