The
N-Compass router jig is a precision compass tool designed for cutting
accurate circles and arcs. It has the ability to cut a range of diameters
from very small radii to very large radii, simply and hassle free.
The router attaches to the compass jig using its base plate guide rod
holes. The cutting radius is set using the router base plate's guide rod
locking pins which can then be finely tuned using a Vernier micro-adjuster.
Here we see a ¼" plunger router mounted on the N-Compass routing jig
that has been used for edge profiling on an MDF disc. The disc was actually
cut from its parent board also using the router with a straight flute
bit before it was rounded over with an ovolo bit. The Vernier guide rod
micro-adjuster is seen here on the right was used to fine adjust the bit
alignment. It provides the operator with precise and very fine cutter
range adjustment ensuring very accurate arcs and circle can be routed.
The N-Compass is using pivot pin 'Position A' as its central axis point.
An alternate pivot pin position (Position B) is provided to allow a much
greater degree of flexibility in radii range settings.
The N-Compass is using Mod Rods, a modular guide rod extension system
that give the N-Compass a mid-range to deep range cutting arc radii capability.
A set of Mod Rods will extend the standard maximum range of 180mm radius
up to 700mm, with each additional set extending the guide rods 560mm.
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