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Troubleshooting – Operating Problems
Trouble Probable Cause Remedy
Finished stock is
concave on back
end.
Knife is higher than outfeed table.
Raise outfeed table until it aligns with
tip of knife. See pages 18-19.
Finished stock is
concave on front end.
Outfeed table is higher than knife.
Lower outfeed table until it aligns with
tip of knife. See pages 18-19.
Stock has slight bevel
after edge jointing.
Fence not perpendicular to table. Square up fence with table.
Chip out.
Cutting against the grain. Cut with the grain whenever possible.
Dull knives/knife inserts.
Sharpen or replace knives.
Rotate knife inserts.
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, rough, or torn
grain.
Wood has high moisture content. Allow wood to dry or use different stock.
Dull knives/knife inserts.
Sharpen or replace knives.
Rotate knife inserts.
Knives are cutting against grain. Cut with the grain.
Board thickness does
not match depth of
cut scale.
Depth of cut scale is incorrect.
Loosen screw and adjust scale
accordingly.
Cutterhead slows
while operating.
Feeding too quickly, or applying too
much pressure to workpiece.
Feed more slowly, or apply less
pressure to workpiece.
Excessive depth of cut. Reduce depth of cut.
Dull knives/knife inserts.
Sharpen or replace knives.
Rotate knife inserts.
“Chatter” marks on
workpiece.
Knives incorrectly set on straight
cutterhead.
Set knives properly using provided knife
setting gauge. Check that knife slots
are clean and free of dust or debris.
Feeding workpiece too fast.
Feed workpiece slowly and
consistently.
Uneven knife marks
on workpiece.
Knives are nicked, or out of
alignment.
Straight cutterhead: Replace nicked
knives; align knives properly using
knife-setting gauge. See pages 14-16.
Helical cutterhead: Rotate nicked
inserts. See page 16.