Customizable Router Circle Cutting Jig

This is a 2D OpenSCAD model that can be manipulated to create a 3 layer CNC/laser cut model for creating a circle cutting jig for a standard router or plunge router. Using a long bolt I cut off the end, welded a jamb nut to it, and ground the end to a point.

Here are the variables:

jiglength=length from center to center of concentric circles of jig
bit=diameter of the bit or template bit used on router
contour=radius of smaller concentric circle on outside of jig

holedia=diameter of mounting holes
holenum=number of holes for mounting
holedist=distance from the center of the router to the center of the mounting holes
holeangle=change the rotation/orientation of the mounting holes around the center

trackbolt=width of the sliding track, needs to be adjusted a few times to accept the nut and bolt
routerbaseRAD=radius of the router base
padding= area around the outside of the router base

res=resolution if extruding to 3D

I extruded everything to DXF for proper manipulation.

Using this handle to lock the pin in place: http://www.thingiverse.com/thing:1879190

I also countersunk the mounting holes so the heads of the bolts did not scratch the work piece. I then sanded and applied 2 coats of varnish/linseed oil mix.