Acoustic Guitar Shapes

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Acoustic Guitar Shapes

Postby Rcnewcomb » Mon Jan 16, 2017 3:50 am

It isn't a full-blown gadget, just a LUA script. I took basic measurements of various acoustic guitar body shapes and set up the LUA script to create the bezier curves using ratios or percentages. This allowed me to experiment with the shapes using more of a mathematical approach.

It assumes the project is 24x24 with the XY datum position in the center of the material. It is set up to do one body design, but I have other shapes in the comment section.
To run the script:
1. Open a new project 24x24x0.5 with the XY datum position in the center of the material
2. open the LUA script using Notepad or Notepad++, or some other script editor
3. In Notepad Select all the text of the LUA script using Edit/Select All or <ctrl>A
4. In VCarve or Aspire select Edit/Paste or <ctrl>V

I've attached a ZIP file with the LUA script and a CRV job with 5 different shapes with the associated molds, forms, and spreaders for the waist and upper and lower bouts.
Attachments
JSJOMJ45L05_075MDF.zip
(1.19 MiB) Downloaded 112 times
GuitarShape.JPG
- Randall Newcomb
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Re: Acoustic Guitar Shapes

Postby PaulRowntree » Mon Jan 16, 2017 2:37 pm

Thanks Randall!
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Re: Acoustic Guitar Shapes

Postby sylvan356 » Mon Jan 16, 2017 3:22 pm

I can't wait to see what you have done! Thanks!!!
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Re: Acoustic Guitar Shapes

Postby sylvan356 » Mon Jan 16, 2017 4:31 pm

Randall -
I have tried to use the VCarve file and am able to see all of the work you did there. Terrific! However, I want to use the Lua script. When I follow your instructions I get in the program exactly what you posted - what appears to be a jumbo shape. How do I modify the Lua script to look at, and possibly modify, the other shapes? I tried removing the two dashes (comments) to make them active and deleted what appears to be the Jumbo instructions but when I copy and paste that (without the Jumbo) into Aspire I get nothing. Obviously I am deleting something important. I would really appreciate any help you can give me! Thanks!
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Re: Acoustic Guitar Shapes

Postby Rcnewcomb » Mon Jan 16, 2017 10:09 pm

I've attached examples where I've commented out the Jumbo and uncommented either the Dreadnought or the Gibson L-0
Attachments
DrawGuitarDreadL0.zip
(5 KiB) Downloaded 85 times
- Randall Newcomb
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Re: Acoustic Guitar Shapes

Postby mikeacg » Tue Jan 17, 2017 2:06 pm

Randall,

Can't wait to look at this! Thanks for sharing!

Mike
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Re: Acoustic Guitar Shapes

Postby sylvan356 » Tue Jan 17, 2017 2:13 pm

Randall
Thanks!!!!
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Re: Acoustic Guitar Shapes

Postby hooked » Tue Jan 17, 2017 6:43 pm

Thanks Randall,

I will have a play. If you are interested in guitar design this may be of use http://liutaiomottola.com/formulae/gthang.htm

Cheers

Daryl
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Re: Acoustic Guitar Shapes

Postby Rcnewcomb » Tue Jan 17, 2017 8:02 pm

Daryl,
I haven't used that tool, but I definitely use that site for calculating neck resets.
- Randall Newcomb
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Re: Acoustic Guitar Shapes

Postby hooked » Tue Jan 17, 2017 10:05 pm

Randall,

We may have a similar interest other than CNC. I make small guitars. :roll: http://www.darylhooke.com/pu/gallery/
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