Powermatic PWBS-14CS Operating Instructions And Parts Manual page 33

Trouble
"Blade lead" occurs
(blade wanders
during cut)
Blade cannot be
tensioned properly.
Blade binds in the
workpiece.
Blade forms cracks at
base of teeth.
Cracks on back edge
of blade.
Blade breaks
prematurely.
Probable Cause
Fence not aligned with blade.
Wood is warped.
Excessive feed rate
Incorrect blade being used for the
particular cut being made.
Blade tension improperly set.
Bearing guides not set properly.
Tension spring is fatigued.
Incorrect blade tension or damaged
blade.
Blade too wide for desired radius.
Teeth not suitable for particular job, or
are incorrectly set.
Blade thickness not suitable for band
wheel diameter.
Blade sharpened incorrectly,
becomes overheated.
Band wheels have become
misaligned.
Workpiece being fed too quickly.
Welding on blade not perfectly
aligned.
Thrust bearing is worn; caused by
constant contact with back of blade.
Feeding workpiece too quickly.
Blade guides misaligned.
Blade pitch too coarse, or wrong size
blade for particular cut (e.g., wide
blade to cut a tight radius).
Blade overheated during welding.
Remedy
Check and adjust fence (see page 17)
Select different wood.
Reduce feed rate.
Change blade to correct type.
Set blade tension according to blade
size.
Adjust guides (see pages 24-25).
Replace tension spring (contact
service representative).
Correct accordingly.
Select narrower blade. See chart on
page 35.
Replace with proper blade for job.
Replace with proper thickness blade.
Sharpen blade properly or replace.
Contact service representative.
Reduce feed speed to lessen strain
on the blade.
Eliminate the welded part, and re-
weld properly; or acquire a new blade.
Round the back edge of a new blade.
Replace thrust bearing. Adjust new
bearing according to instructions.
Reduce feed force.
Set bearing guides appropriate
distance from blade.
Refer to blade selection chart; use
appropriate blade for the operation.
Replace blade, or have blade
annealed, or eliminate brittle part and
weld correctly.
33