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## Re: Conch shell in Creo Parametric

This is interesting.

## Re: Conch shell in Creo Parametric

You can use Creo View Express to view this file (conche.prt.2😞 http://www.ptc.com/products/creo/view/express/

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## Re: Conch shell in Creo Parametric

Thank you all for you interest and pointers.  I now need to work out how to create the curve for the sweep path using a trajpar function.  If someone with more mathematical acumen than I can lay out the formula for me I would be most grateful.  I think I can work out the relations to set the section to vary.

Regards John E Forth

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## Re: Conch shell in Creo Parametric

John,

You started quite a buzz internally here at PTC. Check out this blog, http://blogs.ptc.com/2011/12/01/the-fibonacci-conch/

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Regular Member
(in response to JohnF)

## Re: Conch shell in Creo Parametric

Those Mathcad guys are always showing off. I think we can do this in basic Creo... maybe with a datum graph. Trajpar is a wonderful thing but it's also not necessary all the time... there are other ways to create interesting helicals and strange sweeps without it.

Hmm... finally something fun to play with!

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Regular Member
(in response to JohnF)

Hi Mark...

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## Re: Conch shell in Creo Parametric

Brian,

You should be able to right-click on the link and select Save Target As from the pop-up menu to save the part (rather than open it). If not, let me know and I'll email it to you.

Looking forward to seeing what you come up with!

Cheers,

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## Re: Conch shell in Creo Parametric

Hello John

I try to create Fibonacci Spiral through Golden Rectangle with creo Parametric.

Here is some examples of my 3D model "Fibonacci Spiral" (I use some sketch and variable section sweep with Trajpar functions)

If that's what you need, I can make a short video demonstration. Let me know

Golden Rectangle and Fibonacci Spiral

3D Fibonacci Spiral

3D model of Fibonacci Spiral

Best Regards

Best Regards,
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## Re: Conch shell in Creo Parametric

Here it is, just in case

http://apps.ptc.com/schools/conche.zip

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Regular Member
(in response to JohnF)