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OPERATION MANUAL
AVOIDING SNIPE
Snipe, gouging or depression of the board at the ends, can occur when the board is not properly
supported. (Fig. 3.11)
For workpieces longer than 1200mm, greater care must be taken to reduce the problem because
the additional length of the workpiece translates into more unsupported weight pulling down
on the end of the board. This unsupported weight will work against keeping the stock flat. Make
sure to use supports or stands whenever long pieces are being planed to avoid this problem.
Since snipe occurs at the end of the boards, it is good practice to start with a workpiece that is
slightly longer than what you need so that you can simply cut off the end with the problem.
F
ig
. 3.11
CHIP MARKS OR INDENTATIONS
Reason:
Chip indentation or chip bruising is the result of wood chips not being removed from
around the cutterhead. Instead, they are deposited on the planed surface and crushed into the
workpiece by the outfeed roller. This condition can be caused by a number of reasons, some of
which are:
a
. The type of lumber being planed. Certain species have a tendency to chip bruise.
b.
A high moisture content (20% or higher) and/or surface moisture. Typically found in air-dried
lumber where the surface is dry but the interior of the stock needs more time to season.
c.
Dull knives or inserts
d.
Depth of cut too much.
Solution:
a
. Lumber must be completely dry, preferably kiln-dried (KD). Air-dried (AD) lumber must be
seasoned properly and have no surface moisture. DO NOT plane partially air-dried (PAD)
lumber.
b.
Make sure the planer knives or inserts are sharp.
c.
Reduce the depth of cut and make more passes.
22/07/2019
Instructions Manual for T-13S (W815)
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