Troubleshooting - KNOVA KN DP-2000N Manual

TROUBLESHOOTING

WARNING
To avoid injury from an accidental start, turn the switch OFF and always remove the plug from the power source
before making any adjustments.
PROBLEM
• Noisy operation
• Drill bit burns
• Run out of drill bit
point/drilled hole
not round.
• Wood splinters
on underside.
• Workpiece torn
loose from hand.
• Drill bit binds
in workpiece.
• Excessive drill bit
runout or wobble.
• Quill returns too
slow or too fast.
• Chuck will not stay
attached to spindle.
It falls off when
trying to install.
POSSIBLE CAUSES
• Incorrect belt tension.
• Dry spindle.
• Loose spindle pulley.
• Loose motor pulley.
• Incorrect speed.
• Chips not coming out of hole.
• Dull drill bit.
• Feeding too slowly.
• Not lubricated.
• Grain in wood or lengths of cutting
flutes and/or angles not equal.
• Bent drill bit.
• No backup material under
workpiece.
• Not supported or clamped properly
• Workpiece pinching drill bit,
or excessive feed pressure.
• Improper belt tension.
• Bent drill bit.
• Worn bearings.
• Drill bit not properly installed
in chuck.
• Chuck not properly installed.
• Coil spring has improper tension.
• Dirt, grease, or oil on the tapered
inside surface of chuck or on the
spindle's tapered surface.
POSSIBLE SOLUTION
• Adjust tension. See section "BELT TENSION".
• Lubricate spindle.
• Check tightness of retaining nut on pulley,
and tighten if necessary.
• Tighten set screw in motor pulley.
• Change speed. See section
"SPEEDS AND BELT PLACEMENT".
• Retract drill frequently to clear chips.
• Resharpen drill bit.
• Feed fast enough – allow drill to cut.
• Lubricate drill.
• Resharpen drill bit correctly.
• Replace drill bit.
• Use backup material. See section
"BASIC DRILL PRESS OPERATION".
• Support workpiece or clamp it. See section
"BASIC DRILL PRESS OPERATION".
• Support workpiece or clamp it. See section
"BASIC DRILL PRESS OPERATION".
• Adjust tension. See section "BELT TENSION".
• Replace drill bit.
• Replace bearings.
• Install drill bit properly. See section "BASIC DRILL
PRESS OPERATION" and "INSTALLING DRILL
BIT IN CHUCK".
• Install chuck properly. See section
"INSTALLING THE CHUCK".
• Adjust spring tension. See section
"QUILL RETURN SPRING".
• Using a non-alcohol based cleaner, clean the tapered
surface of the chuck and spindle to remove all dirt,
grease and oil. See section
"INSTALLING THE CHUCK".
15