|
Tip
#53
Shopsmith Ovararm Pin Router
Click
here for a printer friendly version of Tip-
Pg. 1-4, Pg
5-8, Pg 9-12, Pg
13-16, Pg 17-20, Pg
21-23
Help
with Downloading PDF Files
Edging
|
|
|
Figure
22-5.
Notice that workpiece (A) has only a portion of its
edge removed, while workpiece (B) has the entire edge
removed.
|
This process
is used most frequently in the construction of furniture and
cabinetry. And although the shaper is an excellent tool to
use for the job, the high operating speed of the routing system
can often produce cuts so smooth that they will seldom require
sanding.
To begin,
there are two types of edging operations (Figure
22-5).
Full
Edge Removal-First, there's the type where the entire
edge of the workpiece is removed.
|
|
|
Figure
22-6.
When removing the entire edge of a straight workpiece,
use a fence to control the depth-of-cut.
|
This operation
is performed with unpiloted bits and requires the use of a
fence (Figure
22-6) or guide pin to limit the depth-of-cut and keep
it consistent along the entire edge.
When working
projects with straight edges, it's best to use a two-piece
fence or a guide strip to control your depth-of-cut.
Remember
that if you're using a two-piece fence for this operation,
the infeed side of the fence is adjusted to control the depth-of-cut
while the outfeed side is ad-justed to provide support for
the stock after the cut has been made (Figure
22-7).
Keep in
mind that in order to remove the entire edge of a workpiece,
the bottom cutting edge of the bit will have to pro-trude
below the workpiece.
|
|
|
Figure
22-7.
Note that during full edge removal, the outfeed side
of the two-piece fence is set forward of the infeed
side to provide support after the edge has been removed.
Note: Offset is exaggerated for clarity.
|
To perform
this operation without routing into the top surface of the
table, be sure to position the table so the bit protrudes
down through the hole in the table plate or the table insert
during operations.
When working
against a fence, always make the cross-grain cuts first, followed
by the with-the-grain cuts to cut away any tearouts or splintering.
Don't try to make your cuts in a single pass. Always take
multiple passes to achieve the cleanest cuts.
|
|
|
Figure
22-8.
Removing the entire edge on a round project is easiest
by using the guide pin or starter pin as a central pivot
point and rotating your workpiece through the cut.
|
When removing
an entire edge on a round project such as a plaque or wheel,
you can control the depth-of-cut by drilling a shal-low hole
in the center of your circular workpiece (on the back side)
that can be dropped over an offset guide pin or the starter
pin and used as a pivot to rotate the stock through the cut
(Figure 22-8).
The final
way to control the depth-of-cut when removing the entire edge
of a workpiece is with a fixture. This process will be explained
later in the chapter.
Partial
Edge Removal-This is the simplest of all edging operations
since it is usually performed with piloted bits that control
the depth-of-cut during operations on straight or irregular-shaped
workpieces.
|
|
|
Figure
22-9.
When removing the partial edge with a piloted bit, rest
the workpiece against the 1/4" starting pin and ease
the stock into the rotating bit.
|
If you're
using a piloted bit, fences and fixtures are not necessary.
Just ease your workpiece into the cut by resting it against
the 1/4" starting pin, then guide it against the bearing or
solid pilot of the bit (Figure
22-9).
|
|
|
Figure
22-10.
When decorating the partial edge of an irregular-shaped
workpiece with an unpiloted bit, simply guide your stock
against a guide pin that's been aligned with the router
bit.
|
If you
want to remove only part of the workpiece edge and have no
piloted bits, you will have to use fences to control your
depth-of-cut on straight-edged projects.
In those
cases where you're using unpiloted bits on circular or irregularshaped
stock, simply use an undersized guide pin to control your
depth-of-cut. The guide pin should be centered under your
bit during this operation. Then, merely press your stock firmly
against the pin as you rotate it through the cut. The depth-of-cut
can be changed by altering the size of the guide pin (Figure
22-10).
Continue
to Decorative Surface Cuts
Back to Routing System Operations
|
