-26-
G0633/G0634 Jointer/Planer Combo Machine
Here are some rules to follow when choos-
ing, jointing, and planing stock on a jointer
or thickness planer:
•
DO NOT joint or surface plane stock that
contains knots.
Injury to the operator or
damage to the workpiece can occur if the
knots become dislodged during the cutting
operation.
•
DO NOT joint or surface plane against the
grain direction.
Cutting against the grain
increases the likelihood of stock kickback, as
well as tear-out on the workpiece.
•
Jointing and surface planing with the
grain produces a better finish and is safer
for the operator.
Cutting with the grain is
described as feeding the stock so the grain
points down and toward you on the jointer
(
Figure 28
) or away from you on the planer
(
Figure 29
), as viewed from the edge.
Note:
If the grain changes direction along the
edge of the board, decrease the cutting depth
and make additional passes.
Figure 28.
Correct and incorrect grain alignment
to cutterhead (jointer).
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Stock Inspection
and Requirements
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Figure 29
. Correct and incorrect grain alignment
to cutterhead (planer).
•
Remove foreign objects from the stock.
Make sure that any stock you process with
the jointer/planer is clean and free of any dirt,
nails, staples, tiny rocks or any other foreign
objects, which if they hit the knives or inserts
and are drawn into the dust collector, may
cause a fire hazard. The particles may also
damage the knives/inserts. Wood stacked
on a concrete floor can have small pieces of
stone or concrete pressed into the surface.
•
Only process natural wood fiber through
your jointer/planer.
Never joint MDF, par-
ticle board, plywood, laminates or other syn-
thetically made materials.
•
Make sure all stock is sufficiently dried
before jointing or planing.
Wood with a
moisture content over 20% will cause unnec-
essary wear on the knives/inserts and poor
cutting results. Excess moisture can also
hasten rust and corrosion.
•
Scrape all glue off of boards before plan-
ing.
•
Keep your work area clear.
Jointer Specific Rules:
•
Make sure your workpiece exceeds
the minimum dimension requirements
(Figures 30 & 31) before edge jointing or
surface planing, or it may break or kick
back during the operation!
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