[nenoneno]

Hi!

I have the following problem in Rhino: I want to make a smooth surface which connects the Head of a guitar and the Neck. The following picture should give you an idea of what i mean. The joint has to be clean and smooth, because i need the modell later on for rendering purposes.



And here is the joint on a real guitar:




neno

[Kammo1]

That looks alot like the Ken Lawrence headstock ? not sure whether he would approve of someone copying his trademark headstock :nono:.. anyway it looks like a good model for sure.

[bostosh]

I can put a surface in that area,
What radius to the flat? or
do you want a smooth tangent curve?

[nenoneno]

Thanks for the replies!

1.) Yes, it is a Ken Lawrence Explorer and it's pretty accurate I think. However I just modell it for rendering purposes, not for building and sharing it I need the neck joint actually for a Les Paul-like model

2.) To bostosh: You mentioned it: a smooth tanget curve

neno

[bostosh]

neno,
I can make it look just like the original, I need to think a little, about exactly how.

[nenoneno]

Nice to hear

Thanks!

neno

[fabconv]

hi, i'm a solidworks user
send me an iges and i finish it (should take less than 5 minutes)

[nenoneno]

Thanks fabconv for your offer!

You see, I want to know how I can modell that in Rhino, because there must be a way and I will need to know how to solve this "problem" for future projects. I also don't want to annoy you by sending you 10 modells and saying: "pls make this again" . I'm sure you are kind and would do that but you know what I mean

If I don't find a solution I will gladly accept your offer!

Thanks!

[LN-JET]

Try to connect the surfaces of the headstock, so that they form a single edge. Or duplicate edges and make a single curve of it.
Make lines closest to the fretboard and use as cross sections, else you will not get a straight connection at the sides.
Then you either use the neck and headstock curve as rails, and do a sweep with your three cross sections, alternatively try my favourite; the curve network command.

Lars

[LN-JET]

Well, none of my methods yielded very good surfaces, but I found another way that can be adapted to the situation.



First extend your original lines until they meet.
Then do a surface from curve network. Specify tangency to the neck surface edge.
Then do a split in the desired plane, and cap the opening. Voila!

You may have to adjust the height of the curves to get a nice radius at the split line.

Lars

[nenoneno]

Hi!

Thank you very much LN-JET for your help!!!! I think that's it. I currently don't have time to try it but I will post my result as soon as I can!

Thanks again

[nenoneno]

Hi!

I've tried the solution and it's good but not 100% smooth.

Here is what I get:

[LN-JET]

Ok, I see the problem. Your surfaces are somewhat more complex than my example.
What if you make the small surface B afterwards, and make the edge tangent to A?

Lars

[bostosh]

This is interesting,
A perspective now,
With these powerful graphics systems it is extremely easy to generate surfaces,
With experience one can generate correct surfaces and view them.

This stuff was done in the past with care and experience without graphics, Same principals of tangentcy, surface continuity apply with graphics.

[nenoneno]

I think I got it! it's not yet perfect because I don't have the time to try it again. I'll get rid of the edge in the middle of the neck.

Here is my result:


Thanks LN-JET for your help! You brought me to think about it in another way!

I will post the process of how I did it later. Currently I'm short in time.

Thanks again

P.S.: as you wisely said bostosh - it's all about tangency