Jet JJP-12, Operating Instructions And Parts Manual

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24
Performance Troubleshooting – Planer
Trouble Probable Cause Remedy
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.
Snipe
Note: Snipe can be
minimized but not
eliminated
Lumber not butted properly. Butt end to end each piece of stock
as they pass through.
Planing wood with high moisture
content. Remove high moisture content from
wood by drying.
Fuzzy Grain
Dull knives. Sharpen or replace.
Too heavy a cut. Adjust proper depth of cut
Knives cutting against grain. Cut along the grain.
Torn Grain
Dull knives. Sharpen knives.
Dull knives. Sharpen knives.
Too heavy a cut. Adjust proper depth.
Rough/Raised Grain
Moisture content too high. Remove high moisture content from
wood by drying.
Dull knives. Sharpen or replace knives.
Feed speed too slow. Increase speed.
Rounded, glossy
surface
Cutting depth too shallow. Increase depth.
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.
Poor feeding of
lumber.
Surface of feed rollers clogged. Clear pitch and residue out of teeth.
Knife projection. Adjust knife projection.
Uneven depth of cut
side to side.
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.