The Guitar Modelling Thread!

Discussion in 'Luthiery, Modifications & Customizations' started by AwDeOh, Jun 3, 2013.

  1. Phon

    Phon SS.org Regular

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    Finally figured out how to implement multiscale calculation in Autodesk Inventor, thanks to cross-checking scale lengths between DXF and SVG format.

    [​IMG]
    [​IMG]

    FretFind's DXF output for fanned frets really threw me for a loop, since the frets looked like this:

    [​IMG]

    After many days of frustration, I realized that SVG and DXF output was correct, the SVG's frets are not colinear after all (due to non-vertical string paths),
    and that simply joining the scales of the outer string paths would produce negligible intonation errors (on the order of microns!).

    Though in the end I really had nothing to worry about, I figured I might share my experience with FretFind2D so others won't get caught in the non-issues that I tried to solve!
     

    Attached Files:

  2. vansinn

    vansinn SS.org Regular

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    Cool! Did you write a Visual Basic script or arrange the calculus in the parameter file?
    Or maybe I've misunderstood, as it seems likely you simply imported the already done numbers from fret2find into Inventor..
     
  3. Phon

    Phon SS.org Regular

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    I simply imported the parameters (and added a few new ones) listed in the screenshot below:

    [​IMG]

    Sketch constraints and equations control the final fretboard shape. Winspear implemented the same thing in Solidworks,
    though he uses some different variables than the ones shown here. His is more geared for actual CNC work, where mine
    is simply for idea sketching. :)
     

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  4. Phon

    Phon SS.org Regular

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    Single string version of 'kickass' bridge, WIP:

    [​IMG]
     

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  5. Phon

    Phon SS.org Regular

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    Decided to do a six string fanned-fret version of the Gecko Upright :)

    [​IMG]
     

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  6. Phon

    Phon SS.org Regular

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    Carved out truss rod channels and trying out a scalloped nut profile:

    [​IMG]
    [​IMG]
     

    Attached Files:

  7. Phon

    Phon SS.org Regular

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    Custom dual-coil pickups with proportional string spacing

    [​IMG]

    Preliminary string paths

    [​IMG]
     
  8. Phon

    Phon SS.org Regular

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    Added fretboard dots and split the neck up into a 5 piece laminate. The woods - Bubinga/Wenge for the neck, and Macassar Ebony for the fretboard:

    [​IMG]

    Additional images:

    Scarf joint detail
    2160p, full 3/4 view
     
  9. turenkodenis

    turenkodenis SS.org Regular

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    Fantastic modelling skills!
     
  10. Phon

    Phon SS.org Regular

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    Finished string paths:

    [​IMG]

    Grabbed some Schaller M4 Light tuners I had modeled previously and stuck them in this test assembly.
     
    Solodini likes this.
  11. knispler

    knispler SS.org Regular

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    Nice Work on the Tuners and the string winding!:yesway::yesway:
     
  12. Phon

    Phon SS.org Regular

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    Did the truss rod cover, and spent another 2 days hand-tracing the Gecko outline to engrave:

    [​IMG]
    [​IMG]

    I'm not sure if I want to trace the Warmoth logo at the moment... had enough tracing for right now. :ugh:
     
  13. Feathertone

    Feathertone Vendor

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    Ahoy !

    Some super nice modelling jobs up here. Niice!

    Here's my latest.. although a bit boosted after rendering the top view.. ;)

    I've done my modelling with Autodesk Fusion, using drawings and references drawn in Autocad.

    Cheers!

    -L

    Feathertone_Zangao8_cover_photo_2.jpg
     
  14. Phon

    Phon SS.org Regular

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    Dude that's a pretty sick build you have! What's the scale length/fan?
     
  15. Phon

    Phon SS.org Regular

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    Did the truss rod in the style of Stewart Mac's Hot Rod, since they had enough critical dimensions to make a reasonably accurate replica.
    I had to cut into the fretboard a little, or else the neck would have been less than 1mm thick at the beginning of the volute!

    Section View
    Side View
    Truss Rod Detail

    Rod length is 33.875", nut length is 2.625", total length 36.5".
     
  16. LiveOVErdrive

    LiveOVErdrive CNC hack

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    To any of you who do 2D modeling on the computer, what software do you use?

    I've tried Manga studio (basically photoshop in this context) and it works okay for me. But I'm thinking Inkscape might be a better choice.

    Also where do people go to print out their plans full scale. The local print shops will do poster size stuff with nice semi gloss paper and such but I really don't need anything with a nice finish. Something cheaper and less fancy would be great.
     
  17. KnightroExpress

    KnightroExpress Guitar Nerd Vendor

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    For 2D, I use AutoCAD. Inkscape has always been oddly crashy for me, but your luck may be different.

    For printing, try Fedex/Kinkos, I've always had good and cheap results there.
     
  18. Phon

    Phon SS.org Regular

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    Do any places do paper sized beyond A0? My upright bass is ~61" long, so it requires a 2A0 size to make sure it is a full scale print.
     
  19. LiveOVErdrive

    LiveOVErdrive CNC hack

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    Biggest I've seen is 3'x4'. And that is like 60 dollars. The trouble is these print shops are doing high quality glossy color prints when I basically just want a big black and white laser print job on flat normal paper. I can't find anyone who does that though.
     
  20. KnightroExpress

    KnightroExpress Guitar Nerd Vendor

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    You might have luck with a custom wallpaper printer or someone who does banners. Like....big banners.
     

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