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The "router box profiler" (rbp) flattens the lower end of
the paddle blade surface while cutting the spline that blends
the shaft into the paddle blade.
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The router is mounted on the off white
base extender that allows it to slide
back and forth over the white base box.
The yellow sled prevents the base extender
and router from rotating while it is moved
in and out as well as left and right over
the blade. These keeps the rails moving
straight on the templates.
The brown rails are connected to the base
extender. These rails engage the templates,
shown in red, as the router approaches the
left or shaft end of the paddle. As the
rails move left onto the templates the
router rises removing less wood in the
center section of the blade.
Do to the taper cut on the bottom of the rails they do not engage the
templates when the router is on the right or lower 2/3 of the blade.
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Here is the template cut from a piece
of maple. I will slice the piece in to two
pieces with the bandsaw. It's shown in red on the rbp.
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Here is the paddle still mounted in the rbp after cutting the surface.
Note how the shaft is left extending down into the blade forming
the spline.
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