Troubleshooting - Wilton A3816 Operating Instructions & Parts Manual

Troubleshooting

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