Performance Troubleshooting - Planer - Jet JJP-12 Operating Instructions And Parts Manual

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