Any ideas about how to make complementary curves?
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Replies
My first thought was twin sisters.. But.. not related to woodworking.
I am not sure what you are asking.
Will,
Like Wolf-man Jack used to say,
"Baby, if you've got the curves, I've got the angles."
Ray
Wolf-man Jack .. THANKS for remembering .. Old Chicago boy here.. Loved listining to Blues at night.. None around anymore that I can find on the radio! Damn!
If your looking for good blues try 88.7 WBFO out of Buffalo. WBFO.ORG on Saturdays and Sundays from 11AM to 5PM and 10 to 12 midnite those days. They broadcast over the internet. I listen to Jim Santella every weekend. Wouldn't miss it. Bob
There can be (at least) 2 approaches:
First make a paper template of the curve you want to achieve, and cut into 2 portions with a knife or scissors.
1. The normal way would be to make a separate template using each side portion of the paper cutout. The template can be in masonite, MDF, whatever you like. You need to file, sand, connive, the 2 templates to be a perfect fit. Then use a router and flush-trimming bit to make each part with its own template.
If the fit is critical, or this is a commercial setup, it would pay to have the templates made in aluminum plate by someone with a CNC.
2. If the pieces you need to produce are too small to reasonably set the template on them, then you would need to work from the waste side, which is also possible but a bit more complex:
Draw a new line on each of your paper templates, set back from the curved edge by exactly the diameter of your flush trimmer, and reduce the templates to this line. This is the critical stage...you must measure correctly. Depending on the shape, a improvised curved-face marking gauge can be very useful here.
Transfer your newly cut patterns to a material like masonite, MDF, or whatever you like and make the actual templates for the router bearing, smoothing the edges with file, sandpaper, etc.
Clamp the template to the waste side of wood and rout to get your finished piece which will fall off.
David Ring
http://www.touchwood.co.il/?id=1&lang=e
Edited 11/1/2008 2:09 am by ring
A way to do it is with the right combinations of router bit sizes and router guides. This is easier with some routers than others. Bosch makes its router guides in sizes that make this possible. Triton router guides are made for sign making and worthless for themplate work. (Grumble, grumble, ....)
The basic principle is to create a template for one piece and then use that to create the template for the mating piece. It requires some measurement of bit and guide diameters and some math or CAD work, to figure out which combination will create a template that can be used with another combination to cut the mating piece. There are some books on routers that can explain this in detail and probably some on-line resources too.
See FWW no.75.
When I click the links in your message, all I get is pictures, not the article that goes with them.
Get FWW 75.
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