TROUBLE-SHOOTING (3520A Lathe)
PROBLEM | POSSIBLE CAUSE | SOLUTION | ||
Excessive vibration. | 1. Defective spindle bearings. | 1. | Replace bearings. | |
| 2. | Worm or defective belt. | 2. | Replace belt. |
| 3. | Defective motor. | 3. | Replace motor. |
| 4. | Workpiece warped, | 4. | Correct problem by planing |
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| has major flaw, or was improperly |
| or sawing, or scrap workpiece. |
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| prepared for turning. |
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Motor or spindle stalls. | 1. Excessive cut. | 1. | Reduce cut depth. | |
| 2. | Defective motor. | 2. | Replace motor. |
| 3. | Excessive belt wear. | 3. | Replace belt. |
| 4. | Improper belt adjustment. | 4. | Readjust belt. |
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Motor overheats. | 1. Motor overloaded. | 1. | Correct overload condition, | |
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| such as reducing cut depth. |
| 2. | Improper cooling on motor. | 2. | Clean sawdust from fan and |
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| duct areas of motor. |
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Motor starts slowly or | 1. Low voltage. | 1. | Request voltage check from | |
fails to come up to speed. |
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| power company and correct |
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| low voltage condition. |
| 2. | Defective motor. | 2. | Replace motor. |
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Motor fails to develop full | 1. Power line overloaded. | 1. | Correct overload condition. | |
power. | 2. Undersize wires in supply system. | 2. | Increase supply wire size. | |
| 3. | Low voltage. | 3. | Request voltage check from |
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| power company and correct |
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| low voltage condition. |
| 4. | Defective motor. | 4. | Replace motor. |
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Tools tend to grab or dig in. | 1. Dull tools. | 1. | Sharpen tools. | |
| 2. | Tool support set too low. | 2. | Reposition tool support height. |
| 3. | Tool support set too far from workpiece. | 3. | Reposition tool support closer |
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| to workpiece. |
| 4. | Improper tool being used. | 4. | Use correct tool for operation. |
Lathe runs at one speed.
1.Electronic AC inverter defective, not programmed properly or loose wiring.
1.Replace electronic AC inverter, reprogram, or check wiring.
Headstock moves when | 1. Excessive pressure being applied by |
applying pressure with | tailstock (more than 500 lbs. of force) |
tailstock. | NOTE: The screw action of the tailstock |
| is capable of applying excessive pressure |
| to workpiece and headstock. Apply only |
| sufficient force by tailstock to hold work- |
| piece securely in place. Excessive |
| pressure can cause damage to machine. |
1.Slide headstock down the left side of the lathe against the stop then apply pressure to workpiece with tailstock.
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