8
2
Both pivots should be tightened in the One
Track, but still be able to pivot on the screw.
The size of the oval is controlled by the distance from the
tool to the pivots. Coarse adjustments in oval sizes should be set
by moving both pivots to the approximate dimensions needed.
The 6" One Track is for fine tuning the size. For
example, if the jig is set to cut a 4" x 6" oval (2" differential)
and you adjusted the 6" One Track to stop the jig 1"
further away from the cutting tool, the jig would then
cut a 6" x 8" oval, but still have a 2" differential.
ATTACH AXIS BASE TO WORK
The
Axis
Base
(3210B or 3210C)
will be mounted
below the work. There are two mounting possibilities.
Option A:
Axis Base is mounted directly on the underside
of the work, for example a solid plaque.
See fig. 5 & 7.
Option B:
Axis Base and work are mounted to a plywood
base, with the plywood base in between them. An example
of this application is a segmented open frame.
See fig. 6.
Mark the center of your work, or plywood base. There
are small center marks at the ends of each groove in the
Axis Base to help align it on the center of the work. Select
the Axis Base size that’s as close as possible to the oval
size. In the case of our example, use the 5-5/8" Axis Base
(3210C).
Rough cut the part (and Axis Base if necessary)
to size. Attach the Axis Base to the work, or plywood
base, with 1" screws
(STP008)
or double face tape.
SANDING OVALS
Slide the 16" One Track away from the sanding
surface. Rotate the Inside Pivot so it’s at a right
angle to the One Track and rotate the Outside Pivot
so it’s in line with the One Track.
See fig. 5.
Set the Axis Base/work on the Pivots, with the long
axis of the work at a right angle to the One Track. Slip
the groove in the Axis Base that lines up with the Outside
Pivot on the Outside Pivot first. Then slide the Axis Base
forward or back on the Outside Pivot until the Inside Pivot
slips into the cross slot in the Axis Base.
See fig. 5 & 7.
Turn on the sander. Slide the One Track/Axis Base/work
forward towards the sanding surface. The 6" One Track will
control how far forward you can go. Keep going forward
until the jig stops
(6" One Track will bottom out against
the edge of the work table)
, then rotate the Axis Base/work
clockwise until the oval is sanded to shape. Make more than
one pass to insure the work has been fully machined as it
has a tendency to push away from the sander.
See fig. 8.
If the part is too large, loosen and slide the 6"
One Track away from the edge of the work table. If
the part is too small, loosen and slide the 6" One
Track towards the edge of the work table.
If your part overhangs the Axis Base by more than
3"
(or any amount that makes you uncomfortable)
, we
recommend you double stick tape some 1/2" spacers to
the work table to act as stabilizers for the work to ride on,
and help prevent the Axis Base/work from tipping.
6
5
7
Segmented Frame
Plywood
Base
