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14.2 Performance troubleshooting – Planer
Trouble Probable Cause Remedy
Snipe
Note: Snipe cannot be
eliminated, but can be so
minimized as to become
negligible.
Table rollers not set properly. Adjust rollers to proper height
Inadequate support of long boards. Support long boards with extension
rollers.
Uneven feed roller pressure front to
back.
Adjust feed roller tension.
Dull knives. Sharpen knives/Rotate knife inserts.
Lumber not butted properly. Butt end to end each piece of stock as
they pass through.
Fuzzy Grain Planing wood with high moisture
content.
Remove high moisture content from
wood by drying.
Dull knives. Sharpen or replace/Rotate knife
inserts.
Torn Grain Too heavy a cut. Adjust proper depth of cut.
Knives cutting against grain. Cut along the grain.
Dull knives. Sharpen knives/Rotate knife inserts.
Rough/Raised Grain Dull knives. Sharpen knives/Rotate knife inserts.
Too heavy a cut. Adjust proper depth.
Moisture content too high. Remove high moisture content from
wood by drying.
Rounded, glossy
surface
Dull knives. Sharpen or replace knives/Rotate knife
inserts or replace.
Feed speed too slow. Increase speed.
Cutting depth too shallow. Increase depth.
Poor feeding of
lumber.
Inadequate feed roller pressure. Adjust feed roller tension. If proper
tension cannot be achieve, replace
feed rollers
Planer bed rough or dirty. Clean pitch and residue, and wax
planer table.
Transmission v-belt slipping. Tighten transmission v-belt.
Surface of feed rollers clogged. Clear pitch and residue out of teeth.
Uneven depth of cut
side to side.
Knife projection. Adjust knife projection.
Cutterhead not level with bed. Level bed.
Board thickness does
not match depth of cut
scale.
Depth of cut scale incorrect. Adjust depth of cut scale.
Table 3
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