20
DP12VL
21
TROUBLESHOOTING
To avoid injury from an accidental start, turn the switch OFF and always remove the plug from
the power source before making any adjustments.
WARNING
!
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
Noisy operation
or excessive
vibration
1) Incorrect belt tension
2) Dry spindle
3) Loose spindle pulley
4) Loose motor pulley
5) Seized motor pulley
1) Adjust the belt tension.
2) Lubricate the spindle.
3) Tighten the set screws on the
side of the spindle pulley.
4) Tighten the set screws on the
side of the motor pulley.
5) Lubricate motor pulley and motor
shaft; ensure that pulley opens and
closes when machine is ON and
speed is adjusted.
The drill bit burns
or smokes
Excessive drill
run out or
wobble; drilled
hole is not round
1) Drilling at the incorrect
speed
2) The wood chips are not
coming out of the hole
3) Dull drill bit
4) Feeding the workpiece
too slowly
5) Not lubricated
1) Bent drill bit
2) Bit improperly installed
in the chuck
3) Worn spindle bearings
4) Lengths of cutting flutes
or angles not appropriate
for the hardness of the
wood grain
5) Chuck not properly
installed
1) Replace the drill bit.
2) Reinstall the bit.
3) Bearings may need replacement.
4) Resharpen the drill bit correctly
or replace with the appropriate type.
5) Reinstall the chuck.
1) Change the speed.
2) Retract the drill bit frequently to
clear the chips.
3) Resharpen or replace the drill bit.
4) Feed fast enough to cut the
workpiece.
5) Lubricate the drill bit with cutting
oil or motor oil.
Drill bit binds in
the workpiece
Spindle returns
too slowly or too
quickly
1) The workpiece is
pinching the bit
2) Excessive feed
pressure
Coil spring has improper
tension
Adjust the coil spring tension.
1) Support or clamp the
workpiece.
2) Feed more slowly.
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