 Circle Cutter (Trammel)
Well I built a fence for my new table. I decided not to put any T-slots or tracks in the table. So I built a clamp-on fence(with t-tracks) I can put anywhere and still have about 7" of "fine" adjustment without un-clamping. It also has sliding faces. The t-track is from Hartville Tool and uses standard 1/4-20 hex head bolts rather than special t-bolts.
But, back on topic, I picked up a copy of Router Magic by Bill Hylton (as recommended by Bj). Theres lots of great info and jigs inside and today I built the Trammel Baseplate. I made it out of 3/4" plywood for the base and hard maple for the t-slide. It will cut a hole or a disk from about an inch out to about 16". After building it I had to try it out on a piece of scrap mdf. Rather than attaching it to a sacrificial bench top and routing all the way through. I drilled a through pin hole and plunged just less than half way through from both sides, then popped the circle out by hand. This way you can actually do it on your good bench top and then clean up the jagged little ridge with a short template bit (did I mention how much I love my new giant router table).
All of this is leading up to a project using the skis I built. Now I have a good way to produce round templates. I got a set of large guides and just need to get going on a jig holder.
__________________ Rusty  If You Want It Bad, You Get It Bad The Worse You Want It, The Worse You Get It  |