Troubleshooting - KNOVA KN DP-2000N Manual De Instrucciones

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".
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