Changing The Planer Knives; Twisted, Cupped And Bowed Wood - DeWalt dw734 Instruction Manual

FIG. 12
FIG. 13
FIG. 14
FIG. 15
FIG. 16
BOWED WOOD WILL BE FLATTENED BY
FEED ROLLERS AND CUTTER HEAD...
... BUT BOW WILL RETURN AFTER
WOOD IS PLANED
to lift up into the cutter head. If you are planing material that
is especially long, the use of additional material support is
recommended.
TO AVOID SNIPE
Feed the workpiece into the planer so it is level and remains
flat against the base at all times.
Keep long workpieces level throughout planing operation
by receiving or "catching" them from the rear of the planer.
WARNING: Do not place your body between the
workpiece and a stationary structure while the material is
feeding out. Personal injury and/or damage to the work piece
may occur.

Twisted, Cupped and Bowed Wood

If both sides of your material are very rough or if the material
is cupped, bowed or twisted, the planer may not produce
the desired result. Ideally, you should have at least one
level face/surface on your material before you plane. Your
thickness planer will work best with material that has been
run through a jointer to produce one flat surface. If you
do not have at least one flat surface or a jointer, see the
following recommendations:
TO PLANE TWISTED WOOD (FIG. 13)
WARNING: TWISTED
THICKNESS PLANER. IF A JAM OCCURS, TURN THE
POWER OFF, DISCONNECT THE POWER SUPPLY AND
RAISE THE CARRIAGE TO RELEASE THE MATERIAL
TOP FLAT
FROM THE CUTTER HEAD.
To plane only slightly twisted material:
Plane both sides alternating from one to the other until the
desired thickness is reached.
BOTTOM FLAT
TO PLANE CUPPED WOOD (FIG. 14)
To obtain the best possible results with cupped wood:
Rip the material down the middle and plane it as two
separate pieces.
NOTE: Ripping the material reduces the severity of the
cup and allows the machine to deliver better results. More
material will be removed on cupped wood to achieve the
desired thickness than on a normal board.
If ripping the material is not an option:
Plane one side of the material until flat, then plane the
opposite side until flat (Fig. 15).
NOTE: Do not flip the board back and forth between each
pass as recommended by the general planing directions.
TO PLANE BOWED WOOD (FIG. 16)
The feed rollers and cutter head in your planer will push
the bow out of the material as it feeds. When the material
exits the planer, the pressure of the rollers and cutter head
will release allowing the wood to spring back into a bowed
formation. To properly remove the bow, use a jointer.

CHANGING THE PLANER KNIVES

WARNING: To reduce the risk of serious personal injury,
turn tool off and disconnect tool from power source
WOOD MAY JAM YOUR
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FIG. 17
FIG. 18
FIG. 19
FIG. 20
FIG. 21
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