Grizzly G0939 Owner's Manual page 40

Machine Operation
Symptom Possible Cause
Excessive snipe 1. Table extension wings (or aftermarket
(gouge at the end of
support table) not aligned with main table.
the workpiece that is
2. Workpiece not properly supported as it
uneven with the rest
leaves planer.
of the cut).
3. Some snipe is inevitable.
Note: A small
amount of snipe is
inevitable with all
types of planers—
the key is to
minimize it.
Workpiece stops/ 1. Excessive depth of cut.
slows in middle of
cut.
2. Feed rollers too low or too high.
3. Pitch and glue build up on planer
components.
Chipping (consistent 1. Knots or conflicting grain direction in wood.
pattern).
2. Taking too deep of a cut.
3. Nicked or chipped knife/insert.
Fuzzy grain. 1. Wood may have high moisture content or
surface wetness.
2. Dull knives/inserts.
Long lines or ridges 1. Nicked or chipped knife/inserts.
that run along length
of board.
Glossy surface. 1. Dull knives/inserts.
2. Cutting depth too shallow.
Infeed/outfeed 1. Chain and sprockets are worn,
rollers not rotating.
misadjusted, disconnected, or broken.
-38-
Possible Solution
1. Adjust rear extension wing hex bolts to align
extension wing with main table.
2. Hold workpiece up slightly as it leaves outfeed end
of planer.
3. Plane lumber longer than your intended workpiece
length, then cut off excess after planing complete.
1. Reduce depth of cut. (Reduce cutting depth when
planing hard woods.)
2. Raise/lower feed rollers (Page 35).
3. Clean internal planer components with a pitch/resin
dissolving solvent.
1. Inspect workpiece for knots and grain direction; only
use clean stock, and cut WITH the grain.
2. Reduce depth of cut. (Page 24. Always reduce
cutting depth when planing hard woods).
3. Replace affected knife (Page 27), or have it
sharpened; rotate/replace inserts (Page 30).
1. Check moisture content is below 20% and allow to
dry if moisture is too high.
2. Replace knives (Page 27) or have them
professionally sharpened; rotate/replace inserts
(Page 30).
1. Replace knives (Page 27) or have them
professionally sharpened; rotate/replace inserts
(Page 30).
1. Replace knives (Page 27) or have them
professionally sharpened; rotate/replace inserts
(Page 30).
2. Increase depth of cut (Page 24).
1. Adjust chain and sprockets; replace if necessary.
Model G0939/G0940 (Mfd. Since 12/20)