36
TROUBLESHOOTING GUIDE (cont.)
PROBLEM
LIKELY CAUSE
SOLUTION
Vibration when
operating jointer
Loose or damaged cutter tip.
Damaged belt.
Worn cutterhead bearing.
Tighten or replace knife.
Replace belt (See pages 32
– 34)
Check/replace cutterhead bearing.
Infeed table hard to
adjust
Table lock knob is engaged or
partially engaged.
Completely loosen the table lock.
Work piece stops at
the beginning of the
cut.
Outfeed table is too high.
Align outfeed table with cutterhead
tips . (See pages 18 thru 20)
Chipping or tear out
Knots or conflicting grain
direction in wood.
Nicked or chipped blades.
Feeding work piece too fast
Taking too deep of a cut.
Inspect work piece for knots and
grain; only use clean stock.
Rotate or replace knife.
Slow down the feed rate.
Take a smaller depth for cut(always
reduce cutting depth when surface
planing or working with hard woods)
Slightly moisten wood before use
Fuzzy grain.
Wood may have high moisture
content.
Dull knives.
Check moisture content and allow to
dry if moisture is too high.
Replace knives.
Long lines or ridges
that run along the
length of the board.
Nicked, worn, or chipped knives. Rotate or replace cutter tips.
Uneven cutter marks,
wavy surface, or
chatter marks across
the face of the board.
Feeding work piece too fast
Tips not even heights in the
cutterhead.
Slow down the feed rate
Clean cutterhead & tips so they are
set evenly in the cutterhead.
Board edge is
concave or convex
after jointing
Board not held with even
pressure on infeed and outfeed
table during cut.
Board has excessive bow or
twist along its length.
Tables not coplanar.
Hold board with even pressure as it
moves over the cutterhead.
Take partial cuts to remove the high
spots before a full pass.
Adjust tables for coplanar. (See
pages 18 thru 20)
It may take 3 to 5 passes to achieve
a perfect edge depending on the
condition of the board and the depth
of cut.
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