KNOVA KN DP-2000N, Manual

15

TROUBLESHOOTING

POSSIBLE SOLUTION

PROBLEM

POSSIBLE CAUSES

• 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.

• 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.

• 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”.

• Noisy operation

• Incorrect belt tension.

• Dry 

spindle.

• Loose 

spindle pulley.

• Loose

 motor pulley.

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.

• 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.