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Troubleshooting
Performance Troubleshooting – Jointer
Trouble Probable Cause Remedy
Finished stock is
concave on back
end.
Knife is higher than outfeed table.
Align cutterhead knives with outfeed
table. See Cutterhead Knife
Adjustment on page 15.
Finished stock is
concave on front end.
Outfeed table is higher than knife.
Align cutterhead knives with outfeed
table. See Cutterhead Knife
Adjustment on page 15.
Chip out. Cutting against the grain. Cut with the grain whenever possible.
Dull knives. Sharpen or replace knives.
Feeding workpiece too fast. Use slower rate of feed.
Cutting too deeply. Make shallower cuts.
Knots, imperfections in wood.
Inspect wood closely for
imperfections; use different stock if
necessary.
Fuzzy grain.
Wood has high moisture content.
Allow wood to dry or use different
stock.
Dull knives. Sharpen or replace knives/inserts.
Cutterhead slows
while operating.
Feeding workpiece too quickly, or
applying too much pressure to
workpiece.
Feed more slowly, or apply less
pressure to workpiece.
“Chatter” marks on
workpiece.
Knives incorrectly set.
Set knives properly as described in
the Cutterhead Knife Adjustment on
page 15. Check that knife slots are
clean and free of dust or debris.
Feeding workpiece too fast.
Feed workpiece slowly and
consistently.
Cutting too deeply. Make shallower cuts.
Uneven knife marks
on workpiece.
Knives are nicked, or out of
alignment.
A
li
g
n knives per the Cutterhead Knife
Adjustment on page 15. Replace
nicked knives.