Troubleshooting - Promac 212VLL Operator's Manual

PROBLEM
Noisy operation.
The drill bit burns or
smokes.
Excessive drill
run-out
or wobble, drilled
hole is not round.
Drill bit binds in the
workpiece.
Spindle returns too
slowly or too quickly.
Chuck falls off
spindle.
TROUBLE SHOOTING
PROBABLE CAUSE
1. Incorrect belt tension.
2. Dry spindle.
3. Loose spindle pulley.
4. Loose motor pulley.
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. The workpiece is pinching
the bit.
2. Excessive feed pressure.
1. Spring has improper
tension.
1. Dirt, grease, or oil on the
tapered surface on the
spindle or in the chuck.
• Adjust the belt tension. See "To replace
the belt" in ADJUSTMENTS.
• Lubricate the spindle. See MAINTENANCE
section.
• Tighten the retaining nut on the pulley
insert.
• Tighten the set screw on the side of the
motor pulley.
• Change the speed. See "Variable speed"
in OPERATION.
• Retract the drill bit frequently to clear the
chips.
• Resharpen or replace the drill bit.
• Feed fast enough to cut the workpiece.
See "To drill a hole" in OPERATION.
• Lubricate the drill bit with cutting oil or
motor oil.
• Replace the drill bit.
• Reinstall the bit. See "To install drill bits" in
ADJUSTMENTS.
• Replace bearings. Take to a qualified
service technician.
• Resharpen the drill bit correctly or replace
with the appropriate type.
• Reinstall the chuck. See "To install the
chuck" in ASSEMBLY.
• Support or clamp the workpiece. See
"Position the table and workpiece" in
OPERATION.
• Feed more slowly. See "Feeding the drill
bit" in OPERATION.
• Adjust the spring tension. See "Spindle
return spring" in ADJUSTMENTS.
• Clean the tapered surface of both the chuck
and the spindle with a household detergent. See
"To install the chuck" in ASSEMBLY.
34
REMEDY