Jet Tools JWP-208 - Manual (Page 20)

20
Troubleshooting
Operating Problems
Problem Possible Cause Solution
Snipe.
Note: Snipe can
be minimized but
not eliminated.
Table rollers not set properly.
Inadequate support of long
boards.
Uneven feed roller pressure
front to back.
Dull Knives
Lumber not butter properly.
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.
Fuzzy Grain Planing wood with a high
moisture content.
Dull knives.
Remove high moisture content from wood by
drying.
Sharpen or replace.
Torn Grain Too heavy a cut.
Knives cutting against grain.
Dull knives.
Adjust proper depth of cut.
Cut along the grain.
Sharpen knives.
Rough/Raised
Grain Dull knives.
Too heavy a cut.
Moisture content too high.
Sharpen knives.
Adjust proper depth.
Remove high moisture content from wood by
drying.
Rounded, glossy
surface Dull knives.
Feed speed too slow.
Cutting depth too shallow.
Sharpen or replace knives.
Increase speed.
Increase depth.
Poor feeding of
lumber Inadequate feed roller
pressure.
Planer bed rough or dry.
Transmission v-belt slipping.
Surface of feed rollers too
smooth.
Adjust feed roller tension. If proper tension
cannot be achieved, replace feed rollers.
Clean pitch and residue, and wax planer table.
Tighten transmission v-belt.
Lightly roughen the feed roller surface with
sandpaper.