On 4/2/2019 9:43 PM, Greg Guarino wrote:
On Tuesday, April 2, 2019 at 1:39:34 PM UTC-4, Leon wrote:
On 4/2/2019 9:36 AM, Greg Guarino wrote:
https://www.flickr.com/photos/gdguar...n/photostream/

It will be 34.5" long, with a 32" radius according to Sketchup. I imagine some of you might do it with a band saw and a spindle sander, but that's not an option for me.

I have done pattern routing in the past, with success. But I wonder if with this large a curve it might be easier to whip up a jig with a pivot point 34" from the router bit. I would of course roughly cut out the shape with a sabre saw before routing in either case.

Advice?


I have a piece of plywood that I attach my router on to and I pivot the
router and plywood piece as you are mentioning. Just make the cut in
3~4 passes.

When I have a ellipse type arc I print the ark at full scale on
Sketchup, tape the pieces together, glue the drawing to the board and
cut out with either a band saw or jig saw. Then smooth with a spindle
sander.

In my case, I will definitely be using a router. I doubt that I could approach the accuracy I'll get with a router with any other method that is currently available to me. The question is should I make a template or make myself a circle jig.

Make a circle jig if your arc has a continuously same radius, IOW not an
ellipse. Sorry if I was unclear on that.




The template I certainly know how to do. I was curious to see if anyone here used a "jig" - as you mention, just a piece of ply with a couple of holes in it. I may give that a shot. Do I understand you correctly that you do not even cut out the curve roughly beforehand? You make the entire cut with the router, getting deeper with each pass? I do have a plunge router, but I had not considered that.

Yex, I do not cut close to the line, I let the router take a full width
cut and go deeper with each pass.