Troubleshooting - Operating Problems - Powermatic PJ-882 Manual De Operación Y Partes

Troubleshooting – Operating Problems
Trouble
Finished stock is
concave on back
end.
Finished stock is
concave on front end.
Finished stock is
concave in the
middle.
Ends of finished
stock are cut more
than the middle.
Chip out.
Fuzzy grain.
Cutterhead slows
while operating.
Chatter marks on
workpiece (standard
cutterhead).
Uneven knife marks
on workpiece.
Probable Cause
Knife or knife insert is higher than
outfeed table.
Outfeed table is higher than knife or
insert.
Both tables have too much end fall.
Table ends are raised higher than the
middle.
Cutting against the grain.
Dull knives or knife inserts.
Feeding workpiece too fast.
Cutting too deeply.
Knots, imperfections in wood.
Wood has high moisture content.
Dull knives or knife inserts.
Feeding workpiece too quickly, or
applying too much pressure to
workpiece.
Knives incorrectly set.
Feeding workpiece too fast.
Knives or knife inserts are nicked or
out of alignment.
Remedy
Raise outfeed table until it aligns with
tip of knife/insert. See page 19.
Lower outfeed table until it aligns with
tip of knife/insert. See page 19.
Raise both table ends using the cam
adjustment devices. See pages 17-18.
Lower both table ends using the cam
adjustment devices. See pages 17-18.
Cut with the grain whenever possible.
Sharpen or replace knives.
Rotate or replace knife inserts.
Use slower rate of feed.
Make shallower cuts.
Inspect wood closely for imperfections;
use different stock if necessary.
Allow wood to dry or use different stock.
Sharpen or replace knives.
Rotate or replace knife inserts.
Feed more slowly, or apply less
pressure to workpiece.
Set knives properly using provided knife
setting gauge. Check that knife slots
are clean and free of dust or debris.
Feed workpiece slowly and
consistently.
Replace nicked knives or rotate inserts;
align standard knives properly using
knife-setting gauge. See pages 18-22.
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