router cutting ovals


I have been searching for a router attachment to cut ovals. Have looked at a few co's attachments and a couple of plans on the web. My problem however is that the ovals I need do not have a big enough difference between the length and width. I am looking at making oval wood frames, various sizes but for example - 42"long by 38" wide or 48" long by 44" wide. The prof attachments all seem to have differences like 14" rather than 4". Any ideas please. Thanks very much
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'Tech',
Simple answer, if you have the time . . . initially.
A FULL SHEET of 1/4in Tempered Hardboard is about $10. You probably have some white, water-based primer on hand already. There are numerous web-sites, articles, and 'tips' to making/drawing ovals/eclipses with a pencil, a piece of string, and a couple of push-pins.
Use a roller, brush, rag, whatever to 'prime' the SMOOTH side of the hardboard {my preference is a short-nap roller}. Draw your ovals. Then carefully cut out/file/sand to finished size and use as a 'Positive' or 'Negative' template.
I use this technique to make 'Drawing' {1/8in material} and 'Routing' {1/4in material} templates. The water-based 'KILZ' primer yields a slightly matt surface that 'takes' pencil well, and allows clean erasures. Typically I will 'treat' the edges of the 'Router' templates with epoxy to give a harder, longer wearing, edge,
Regards & Good Luck, Ron Magen Backyard Boatshop

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Woodhaven makes one that will do what you want. Spendy at about $170.00. If you want to build something yourself, there are lots of plans around easily modified to any differential you want.

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Just ran across this one. Should do what you want. http://www.highlandwoodworking.com/library/infiniteovaljig.pdf

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Thanks for the links Will look into them
CW wrote:

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On 29 Jul 2006 11:29:01 -0700, snipped-for-privacy@hotmail.com wrote:

Fine Woodworking has a story entitled "Drawing Big Curves" in issue #175 (February 2005) that contains information on page 78 regarding the construction of an ellipse jig.
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