14
11.0 Troubleshooting JDP-20EVS series Drill Presses
Trouble Probable Cause Remedy
Spindle does not turn.
Motor overload protector tripped. Press motor overload reset button.
Circuit breaker tripped. Reset circuit breaker.
Branch circuit breaker tripped or fuse
blown.
Reset branch circuit breaker/replace fuse.
Open wire in switch circuit. Repair open circuit.
Defective switch. Replace switch.
Broken drive belt. Replace drive belt.
Spindle noisy.
Damaged spindle bearings. Replace bearings.
Worn spline. Replace spline.
Drill stalls.
Worn drive belt.
Check condition of belt. Replace if glazed
or slipping on pulleys.
Excessive feed rate for size of drill and
material being drilled. No cutting fluid or
improper cutting fluid.
Reduce feed pressure or use cutting fluid.
Use correct cutting fluid.
Poorly drilled holes.
Drill dull. Sharpen drill.
Lack of rigidity in hold-down method.
Check that all T-slot hold-downs are tight
and that table-lock and drill head bolts are
tight.
Speed too fast for material and drill size.
Check spindle speed recommendations.
Reduce speed if necessary.
Feed too fast for material and drill size. Reduce feed rate.
No or improper cutting fluid or coolant
being used.
Use cutting fluid, or change to proper fluid
or coolant for material being drilled.
Improperly ground drill bit.
Check for proper angles and reliefs.
Regrind to proper geometry.
Motor overheating.
Electrical circuit fault.
Check current draw in circuit. Make sure
current draw is the same as rating on
motor plate.
Oversize drill. Reduce drill size.
Excessive feed. Reduce feed rate.
No cutting fluid, or wrong fluid.
Use correct cutting fluid for the material
and drill.
Table cannot be raised. Lack of lubrication. Lubricate.
No speed readout. Speed pickup out of adjustment or failed.
Adjust gap between speed pickup and
post spindle pulley. If there is no readout
on the LED speed indicator after adjusting
the gap, replace the speed pickup.
Table 5
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