shape violin background

[carry]

Hello everyone
I am asking for help to shape the bottom of a violin of which I attach a draft of sections 2d.
Someone would give me directions on the procedure.
Thank you in advance
carry

 

[User1]

Hello everyone
I am asking for help to shape the bottom of a violin of which I attach a draft of sections 2d.
Someone would give me directions on the procedure.
Thank you in advance
carry

Maybe you should think about a cad 3d! autocad does not meet 3d modeling needs or better you could do it but it is a real casino!:finger:

 

[User1]

carry! That scarraphone on your avatar tricks me every time I see this discussion! Hell is too strong!:biggrin:

 

[Ezio Olivato]

you could try with coons surfaces, because with solids it becomes really complicated.
only condition is that the profiles of the sections are united to the profile of the base.

 

[carry]

thanks to you for the attention
according to you can use loft with trajectories?
Tonyproge I will call it scarf....thank you

 

[Giorgio Mandelli]

Hi, I'll write you a couple of straights.

if you want to shape for educational purposes the body of a violin then the layout of the curves could go well, place that they should be treated and organized better so that they are coincident in the final vertices

If you need to model the violin to make it "work" let me tell you that it is completely wrong to start from the cad.

there is a fresh thread, which has been closed, within which some indications are given regarding the approach to the design:finger:
.
the base of your violin will never play because it lacks a whole series of details that will eventually make the difference. (see photos). according to me the correct approach will be to scan a correct body, made to manina by a luthier, and only from this to trace the right sections. . .

I can confirm that it is far from easy to start modeling a form like this...

If you want the slate, I can give it to you, so you study a little...

 

[carry]

Hello
have you already dealt with the topic I see, for construction or for teaching?
I would like to have a stl to study it a bit.....mclisp61@gmail.comyou would also give me the link of the "fresh"
Thank you.

 

[Giorgio Mandelli]

Hello
have you already dealt with the topic I see, for construction or for teaching?
I would like to have a stl to study it a bit.....mclisp61@gmail.comyou would also give me the link of the "fresh"
Thank you.

There you are:

http://rapidshare.com/files/432621051/violins.rarGood job

 

[carry]

Thank you
I downloaded the file but with the password you sent me returns the following error:

! c:\users\mauro\desktop\violins.rar: crc failed in the encrypted file model.stl (wrong password ?)
Hi.

 

[Giorgio Mandelli]

Thank you
I downloaded the file but with the password you sent me returns the following error:

! c:\users\mauro\desktop\violins.rar: crc failed in the encrypted file model.stl (wrong password ?)
Hi.

http://rapidshare.com/files/432630653/violino.rar

 

[Giorgio Mandelli]

http://rapidshare.com/files/432630653/violino.rar

I'll send you a pvt.

I don't know why but if I pass the link on rapidshare, the rar...

 

[carry]

♪
Thank you very much I sent a pvt
Bye.

 

[marcof]

the base of your violin will never play because it lacks a whole series of details that will eventually make the difference. (see photos). according to me the correct approach will be to scan a correct body, made to manina by a luthier, and only from this to trace the right sections. . .

In fact, the luthier starts from those sections, the "quinte" and the "sesta" to shape the external face of the bottom (or of the table) after which with references to its model and the thicknesses in correspondence of those sections realize the internal excavation determining. obtaining therefore with a cad the theoretical 3d model of the harmonic table or of the bottom starting from those curves is formally correct.

I can confirm that it is far from easy to start modeling a form like this...

It doesn't rain on that. make a form with beautiful curves continuous respecting the parameters of that violin model (here, thirst and thickness) as a good liutaire is not trivial at all

 

[carry]

But no one has any ideas about how to do it?

 

[Giorgio Mandelli]

In fact, the luthier starts from those sections, the "quinte" and the "sesta" to shape the external face of the bottom (or of the table) after which with references to its model and the thicknesses in correspondence of those sections realize the internal excavation determining. obtaining therefore with a cad the theoretical 3d model of the harmonic table or of the bottom starting from those curves is formally correct.

the luthier will also leave from those sections but we want to use them a cad environment then we have to reason differently; In fact, those sections are not in themselves wrong, but they must only be considered as a reference. if we use them as they are forced the designer to produce a series of surfaces with evident points of singularity as well as a whole series of other problems.

I think the approach must be different. I'll give a brief idea. Just give me the time to verify that it is not a "holiday". ..:finger:

 

[marcof]

the luthier will also leave from those sections but we want to use them a cad environment then we have to reason differently; In fact, those sections are not in themselves wrong, but they must only be considered as a reference. if we use them as they are forced the designer to produce a series of surfaces with evident points of singularity as well as a whole series of other problems.
I think the approach must be different. I'll give a brief idea. Just give me the time to verify that it is not a "holiday". ..:finger:

right, but the final result must be those sections in those positions, for what I said is not a simple modeling at all. I think it's hard for you to leave, somehow, the "here" and the "sesta".

 

[Giorgio Mandelli]

right, but the final result must be those sections in those positions, for what I said is not a simple modeling at all. I think it's hard for you to leave, somehow, the "here" and the "sesta".

Among other things, I was looking right now, that those sections are wrong because the thickness of the body is not constant, in fact to produce the correct harmonics there are a series of shortcomings that the liutaire inserts using the chisel

for this reason modeling an object of this type and making it work is a very complex work



here are the steps to do so analogically; if you try to reproduce them pedissequamente a cad do not get anything good
http://www.violini.net/costruzione_violino_03.htmlIf you do everything to cad following the abc of the cad you still get nothing good...

I think it's one of those rare cases that the cad "if the lap in the bag." .

different is the didactic speech... on this point we can embroide over what we want... there are some systems to make a "fake violin"

 

[marcof]

Among other things, I was looking right now, that those sections are wrong because the thickness of the body is not constant, in fact to produce the correct harmonics there are a series of shortcomings that the liutaire inserts using the chisel

those sections represent the body of the bottom of the violin before working the internal surface to obtain the definitive thicknesses. more than anything else are wrong just for the form they have, especially the 4 external scenes at the edge.

here are the steps to do so analogically; if you try to reproduce them pedissequamente a cad do not get anything goodhttp://www.violini.net/costruzione_violino_03.html

It is clear that you cannot transfer the manual processing process of a maple block to the cad to obtain the finished bottom of the violin. to the cad you must have as references the shape of the plant, the quintes and the sixth. as it arrives to the final form is obviously not related to the operations that make the liuthier.

If you do everything to cad following the abc of the cad you still get nothing good...
I think it's one of those rare cases that the cad "if the lap in the bag." .

They are less rare than you think. search on cad3d under "proserpine cloves" :tongue:

different is the didactic speech... on this point we can embroide over what we want... there are some systems to make a "fake violin"

would be a good exercise and however it would be a fake also a background or a harmonic table of reconstructed violin starting from a 3d scan, model cad 3d and working on the cam. the adjustments that are made in the thicknesses working the internal face of the harmonic table and bottom depend on the answer of the wood and therefore on the "manic" of the liuthier.

 

[Ezio Olivato]

this is only a start from the extrusion of the two side and base profiles.
Then we have to work the piece in a bit of a liutaire.
Look if it inspires you.
Hi.

 

[AntonioV]

good ezio, as always use the mouse as a basket.. .

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