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 Post subject: Making A Radius Dish
PostPosted: Wed Jul 23, 2008 9:09 pm 
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Brazilian Rosewood
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Joined: Sat Jun 21, 2008 10:58 am
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Location: Tampa, Florida USA
http://youtube.com/watch?v=tvGemvizrz4


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 Post subject: Re: Making A Radius Dish
PostPosted: Mon Sep 01, 2008 10:11 am 
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Contributing Member
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Joined: Thu Jan 24, 2008 8:01 am
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Location: Houston, TX
First name: Chuck
Last Name: Hutchison
City: Houston
State: Texas
Country: United States
Focus: Build
Status: Amateur
Man, that's a cool idea. Wonder if you could use an electric motor instead of your router? Love the casters idea to help keeping it straight.

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"After forty-nine years of violin building, I have decided that the search for a varnish is similar to the fox hunt. The fun is in the hunt."
Jack Batts Maker and Repairer of Fine Violins


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 Post subject: Re: Making A Radius Dish
PostPosted: Sat Sep 06, 2008 3:34 pm 
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Brazilian Rosewood
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Location: Tampa, Florida USA
I don't see why not. If I build one into my work bench I was going to use a slow rpm. motor with a drive roller McMaster Carr. You would need to make a motor bracket with a spring tension adjustment something like on a contractors table saw. I also planned on putting the drive roller in one of the corners instead of one of the casters. I think it would make for a clean look and remove one less caster. I'd also step up the casters to have bearings.


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 Post subject: Re: Making A Radius Dish
PostPosted: Sun Sep 14, 2008 5:42 pm 
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Koa
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Location: United States
First name: Dave
Last Name: Livermore
State: Minnesota
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Chris,
Great idea. Wonderful tutorial.
I'm working on building one of these right now.

This link to help anyone doing the with the math.
http://www.1728.com/circsect.htm

Really the circle calculator has helped me for a couple years in figuring all kinds of cool stuff related to the various radii on the guitar.

Dave


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 Post subject: Re: Making A Radius Dish
PostPosted: Sun Sep 14, 2008 8:05 pm 
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Brazilian Rosewood
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Joined: Sat Jun 21, 2008 10:58 am
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Location: Tampa, Florida USA
Thanks for adding the link here Dave. That will help. Here also is a spread sheet that Massimiliano Monterosso made up.
http://www.maxmonte.com/utilities/radiusing.xls


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 Post subject: Re: Making A Radius Dish
PostPosted: Thu Apr 23, 2009 11:56 am 
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Walnut
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Joined: Wed Feb 18, 2009 7:59 am
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What do you use for the abrasive? What rind of sand paper will conform to the convex geometry?


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 Post subject: Re: Making A Radius Dish
PostPosted: Thu Apr 23, 2009 12:36 pm 
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Brazilian Rosewood
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Joined: Sat Jun 21, 2008 10:58 am
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Location: Tampa, Florida USA
You can glue on strips across the dish or buy 24" sanding disc that are used for sanding wood floors or get them from Blues creek guitars. The radius of the dome isn't that small to affect the paper as it conforms with no problem.


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