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Troubleshooting: Planer Operating Problems
Trouble Probable Cause Remedy
Table rollers not set properly. Adjust table rollers to proper height.
Inadequate support of long boards.
Support long boards with a roller
stand.
Uneven feed roller pressure front to
back.
Adjust feed roller tension.
Dull knife inserts. Rotate or replace knife inserts.
Snipe.
Lumber not butted properly.
Butt end-to-end each piece of stock
as they pass through.
Planing wood with a high moisture
content.
Remove high moisture content from
wood by drying, or use different stock.
Fuzzy grain.
Dull knife inserts. Rotate or replace knife inserts.
Too heavy a cut. Adjust proper depth of cut.
Knife inserts cutting against grain. Try to cut with the grain for finish cut.
Torn grain.
Dull knife inserts. Rotate or replace knife inserts.
Dull knife inserts. Rotate or replace knife inserts.
Excessive depth of cut. Decrease cutting depth.
Rough/raised grain.
Moisture content too high.
Remove high moisture content from
wood by drying, or use different stock.
Rounded, glossy
surface.
Dull knife inserts. Rotate or replace knife inserts.
Inadequate feed roller pressure.
Adjust feed roller tension. If proper
tension cannot be achieved, replace
feed rollers.
Planer bed rough or dirty.
Clean off pitch and residue; apply
light coat of paste wax to planer bed.
V-belts are slipping.
Check V-belt tension and make any
needed adjustments.
Poor feeding of
lumber.
Surface of feed rollers has been worn
too smooth.
Lightly roughen the feed roller surface
with sandpaper.