3. Insert a Dovetailed Key (3) into each channel in the Jig
Base (2). Center one (hereafter referred to as “Dovetail
Key A”) along the minor axis.
4. Loosen the two Locking Pivots on the Jig Arm (1) and position
them so they mount on the pins in the Dovetailed Keys (3).
Fig. 3.
Note: The Locking Pivot closest to the router must be
mounted on “Dovetail Key B” (along the major axis).
5. Rotate the Jig Arm (1) so it’s aligned with the major axis, and
adjust it in or out until the bit is positioned as desired to make
the cut. Tighten the Locking Pivot on Dovetail Key A.
Fig. 4.
6. Rotate the Jig Arm (1) so it’s aligned with the minor axis, and
adjust it in or out until the bit is positioned as desired to make
the cut. Tighten the Locking Pivot on Dovetail Key B.
Fig. 5.
Note: The maximum distance between Locking Pivots A
and B is 2
1
⁄
2
".
7. With the router off, rotate the Jig Arm (1) through the full
range of cut. You want to ensure that the dovetail keys will
move smoothly, as well as verify the ellipse pattern and proper
placement of any spacers/supports. Then make the cut.
Note: Don’t try to cut to full depth in one pass. Make several
passes, increasing the depth of cut with each pass.
Routing a Circle
1. Mark a center point on your workpiece and lay out the
perpendicular axes.
6
Fig. 3 - Router removed for clarity
Dovetail Key “B”
Locking pivot “A”
Locking pivot “B”
Fig. 4 - Router removed for clarity
Locking pivot “A”
Locking pivot “B”
Position router bit
Dovetail Key “A”
