Troubleshooting: Operating Problems; Troubleshooting: Mechanical And Electrical Problems - KNOVA KN CM-20W3 Manual Del Usuario

TROUBLESHOOTING: OPERATING PROBLEMS

Problem
Snipe.
(NOTE: Snipe Snipe
can not be eliminated,
but can be minimized
so as to become
negligible.)
Fuzzy grain.
Torn grain.
Rough/Raised grain.
Rounded, glossy surface.
Poor feeding of lumber.

TROUBLESHOOTING: MECHANICAL AND ELECTRICAL PROBLEMS

Problem
Uneven depth of cut
side to side.
Board thickness
does not match
depth of cut scale.
Chain jumping.
Possible 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 a 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 dry.
Transmission v-belt slipping.
Surface of feed rollers too smooth.
Possible Cause
Knife projection.
Cutterhead not level with bed.
Depth of cut scale incorrect.
Inadequate tension.
Sprockets misaligned.
Sprockets worn.
Solution
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.
Replace 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 achieved, replace feed rollers.
Clean pitch and residue, and wax planer table.
Tighten transmission v-belt..
Lightly roughen the feed roller surface with
sandpaper.
Solution
Adjust knife projection..
Level the bed.
Adjust depth of cut scale.
Adjust chain tension.
Align sprockets.
Replace sprockets.
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