Help with creating a Mandolin top

Help with creating a Mandolin top

PvdBos
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Help with creating a Mandolin top

PvdBos
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Hello, I want to create a Gibson junior Mandolin Top from 1920 The top is broken so I will make it by my self.

But I have some help with this.

I have create some lines so that I can fill it up with the patch tool but this will not working.

Am a hobbyist so for my it's a challenge

can someone help me with this!

I have my fusion file attached.

thanks

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TrippyLighting
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Could you provide a few photos from different views ?

Have you scaled the canvas in your design  ?

 

Due to the existing symmetry, usually you would only sketch and model half of it and then mirror.


EESignature

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PvdBos
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Hello, I have some photos add to this with some text about dimensions.

I have used the photo Gibson A1 inside.jpg as canvas.

also I have scaled it to 315mm of total length.

Can you help me with this?..

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TrippyLighting
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Consultant

I can help, but you'll have to be patient. If this would only be a modeling task this is not at all a beginner project given that you are also trying to math an existing physical artifact.

 

The photos don't really help, as I am trying to get a better understanding of the geometry where the neck attaches to the body.   Also, please don't attach photos. Images can be directly embedded into a post by dragging them from a folder into the message body, or screenshots can be pasted from the clipboard directly into the message body.

 

I am noticing that your images are quite distorted (lens distortion). 

 


EESignature

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PvdBos
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Contributor

Gibson A1 body.jpg

The neck is attached to the body and the fingerboard is over the neck and the top. 

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TrippyLighting
Consultant
Consultant

Yes, I know that 😉
What I am trying to get a better understanding of is how the curved top surface transitions into the mostly rectangular surface the neck attaches to. As such, these flat, top-down photos don't convey that information. A few more images from different angles would help.


EESignature

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PvdBos
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Contributor

F5.jpg

I have a drawing of a F5, this is similar with an A1. And it has not exact be the same after milling the oversize top it must by hand make it fit.

I hope that this helps for you.
 

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PvdBos
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Contributor

Sorry I have no drawing of this Gibson Mandolin.

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wersy
Mentor
Mentor

@PvdBos  schrieb:

Sorry I have no drawing of this Gibson Mandolin.


You could make templates.

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TrippyLighting
Consultant
Consultant

I wasn't looking for drawings. I was hoping for more photos from different angles.

 

Question: Once you have a model, what do you intend to do with the model?


EESignature

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PvdBos
Contributor
Contributor

I would like to restore this mandolin if I have a model that is similar to the original then I will make G-code for it and mill it on my CNC machine.

What for photo's must make and from what for angles.

 

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PvdBos
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Contributor

The Fusion 360 file what I uploaded is on scale of the canvas photo.

The back/inside of the mandolin top is already done.

is only the top/ouside of the mandolin.

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TrippyLighting
Consultant
Consultant

I took a screenshot of a model I had. Obviously not a mandolin, but another string instrument with similar construction.

I am interested in one or more pictures of how that area circled in red looks like.  

 

TrippyLighting_0-1689880874781.png

 


EESignature

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PvdBos
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Contributor

is this what you mean?

Gibson A1 body_A.jpg

Gibson A1 body_B.jpg

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PvdBos
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Contributor

The finger board is glued on the neck and the top of the body

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PvdBos
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Contributor

is there anyone who can help me make a model similar to what I posted at the beginning Gibson A1 Top v16.f3z

If it's just a little bit like it so I can adjust it.

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PvdBos
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Contributor

From the back.jpg

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TrippyLighting
Consultant
Consultant

That is a good photo. Tells me exactly what I want to see. 

I am attempting this using T-Splines, btw.


EESignature

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PvdBos
Contributor
Contributor

I don't know what you want to see

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matthewrjacobs
Advocate
Advocate

I took a stab at this over the weekend.   Used your canvas,  but pretty much started from scratch.   It's a bit down and dirty and the surface transitions could use some tweaking.  Also, the inside "carve" is pretty crappy, it was quickly modelled.  to do it correctly you'd need to build the inside surface similar to the outside surface. 

 

matthewrjacobs_0-1690241827422.png

matthewrjacobs_1-1690241869797.png