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Operations
Symptom
Possible Cause
1. Table lock is engaged/partially engaged.
Tables are hard to
adjust.
2. Table stops blocking movement.
Excessive snipe
1. Outfeed table is set too low, or knives
(gouge in end of
(straight knife cutterheads only) set too
board that is uneven
high.
with rest of cut).
2. Operator pushing down on trailing end
(infeed side) of workpiece as it leaves
cutterhead.
Workpiece stops in
1. Outfeed table set too high.
middle of cut.
Workpiece
1. Not feeding workpiece to cut "with" the
chipping, tear-out,
grain.
indentations, or
2. Dull knives/inserts.
overall rough cuts.
3. Workpiece not suitable for jointing.
4. Nicked or chipped knives or inserts.
5. Feeding workpiece too fast.
6. Excessive depth of cut.
7. Lack of proper dust collection or clogged
dust port.
Fuzzy grain left in
1. Wood has high moisture content.
workpiece.
2. Dull knives/inserts.
Long lines or ridges
1. Nicked or chipped knives/inserts.
that run along the
2. Loose or incorrectly installed insert (s).
length of the board
3. Dirt or debris under carbide inserts (spiral
cutterheads only).
Uneven cutter
1. Feeding workpiece too fast.
marks, wavy
2. Knives/inserts not adjusted at even heights
surface, or chatter
in the cutterhead.
marks across face
of workpiece.
3. Dirt or debris under carbide inserts (spiral
cutterheads only).
Glossy surface;
1. Dull knives/inserts.
scorching or burn
marks on workpiece.
2. Feed rate too slow.
Workpiece is
1. Workpiece not held with even pressure
concave or convex
against outfeed table during cut.
along its length after
jointing.
2. Workpiece too uneven at start of operation.
3. Tables are not parallel with cutterhead and
each other.
Model G0490W/G0490XW (Mfd. Since 5/16)
Possible Solution
1. Completely loosen table locks (Page 3).
2. Loosen/reset table stop bolts (Pages 46–47).
1. Align outfeed table with cutterhead knives/inserts at
top dead center (Page 46).
2. Focus most of the workpiece pressure against
outfeed table while cutting.
1. Align outfeed table with cutterhead knives/inserts at
top dead center (Page 27).
1. Turn the workpiece 180° before feeding again.
2. Sharpen/replace knives; rotate/replace insert(s)
(Pages 38–41).
3. Ensure workpiece is suitable for jointing (Page 27).
4. Replace knives (Page 38); rotate/replace insert(s)
(Page 41).
5. Reduce feed rate.
6. Reduce depth of cut.
7. Clear blockages, ensure dust collection is operating
efficiently; upgrade dust collector.
1. Ensure wood moisture content is less than 20%.
Allow to dry if necessary.
2. Replace/rotate knives/inserts (Pages 38–41).
1. Replace/rotate knives/inserts (Pages 38–41).
2. Remove/replace insert (s) and install properly (Page
41).
3. Remove inserts, properly clean mounting pocket
and re-install (Page 41).
1. Reduce feed rate.
2. Adjust the knives so they are set up evenly in the
cutterhead (Page 38). Remove, clean, and re-install
any inserts that are "raised" in the cutterhead (Page
41).
3. Remove inserts, properly clean mounting pocket
and re-install (Page 41).
1. Sharpen/replace knives; rotate/replace insert(s)
(Pages 38–41).
2. Increase feed rate.
1. Apply even downward pressure against workpiece
throughout entire travel along outfeed side during
cut.
2. Take partial cuts to remove extreme high spots
before doing a full pass.
3. Check/adjust table parallelism (Page 44).
-37-
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