23
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.
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.
Align knives per the
Cutterhead Knife
Adjustment
on page 15. Replace
nicked knives.
Summary of Contents for JJP-8BT
Page 30: ...30 Assembly Drawing Index ...
Page 31: ...31 Planer Table Assembly ...
Page 32: ...32 Motor Front Frame Assembly 143 ...
Page 33: ...33 Chain Drive Assembly Front Cover Assembly ...
Page 34: ...34 Cutterhead Guard Assembly Dust Cover Assembly ...
Page 35: ...35 Jointer Infeed Table Assembly Jointer Outfeed Table Assembly ...
Page 36: ...36 Cutter Head Feed Roller Assembly ...
Page 37: ...37 Jointer Fence Assembly ...
