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Tip
#50
Using
a Jointer (continued)
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Pg 1-3, Pg 4-6,
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Edge
Jointing
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Figure
6-4.
Always try to work so you are cutting with the grain
of wood; when this isn't possible, make very light cuts,
very slowly. Note: The depth of cut is exaggerated for
clarity.
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The edging
cut is made by moving the stock so the knives will be cutting
with the grain of the wood (Figure
6-4). Warning: Working against the grain seldom produces
a satisfactory surface; it also increases the danger of kickback
and splintering.
If the
cutting action is not smooth or if you feel the stock pushing
back against your hands, the chances are that you are working
against the grain. Stop the pass immediately and reverse the
position of the stock.
If you
have to make a cut against the grain, take a very light cut
and make the pass very, very slowly.
Depth-of-cut
settings on edge jointing cuts never should exceed 1/8". A
setting of from 1/32" to 1/16" usually does the best job and
wastes less wood.
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Figure
6-5.
(A) Begin the cut using your left hand to steady the
stock and your right hand to feed it forward. (B) As
the stock nears the halfway point, reposition your left
hand to the outfeed side of the jointer. (C) Continue
to steady the stock with your left hand while you move
your right hand to the outfeed table. Finish the cut
by pushing the end of the stock past the cutterhead
with both hands.
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Although
the jointing cut is a smooth movement from start to finish,
it may be thought of in the three steps shown in Figure 6-5.
The better side of the stock is placed against the fence with
the work edge down on the infeed table. Hands should be placed
to hold the stock down on the table and snugly against the
fence. The left hand holds the stock down 4" to 6" before
the first bump on the top of the fence and guides the stock.
This permits both side and down pressure to hold the stock
firmly against the fence and flat on the table. The right
hand is placed near the end of the stock and feeds the stock
forward. Warning: If the stock is below the top of the
fence, always use a push stick or push block to complete the
pass.
As the
stock moves over the cutterhead, the guard moves aside to
permit its passage. The left hand does most of the work of
keeping the stock snug against the fence and down on the table,
while the right hand moves it forward. Always try to keep
hands hooked over the top of the stock. Warning: Do not
allow your hands to pass directly over the cutterhead.
At the
end of the cut, the hands are still in about the same position
on the stock. Avoid heavy downward pressure at the end of
the cut, since this might tilt the stock into the cutter,
resulting in a gouged end.
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Figure
6-6.
When jointed boards are butted edge-to-edge, they should
have these qualities.
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If the
machine is properly ad-justed and the pass is made correctly,
the jointed board will have edges that are square with its
face. Edges of a group of jointed boards will fit against
each other without gaps, checking out in all respects shown
in Figure 6-6.
Continue
to Jointing Extra-Wide Stock
Back to Saw-Jointer Combination
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