Nest smoke alarm: How to create the "fibonacci-like" hole-pattern

Forum|Forum|12 years ago
December 4, 2013
5 replies
19290 views

I just came across this Nest smoke alarm, and got curious about the pattern on the front: https://nest.com/blog/2013/10/08/meet-the-nest-protect-smoke-and-co-alarm/

Is it possible to somehow through one or more pattern features to create something like on the attached picture? I can't crack it myself. Help is appreciated

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General

Best answer by TomD.inPDX

Interesting patterns came up when trying to do this without the reference. For the most part, I got the jest of how to make sure it could be mirrored. I used the arc to get a good pattern and the linear pattern with a "twist" for hole sizing and extrusion.

Full version of Creo 2.0 attached (minus the underlay image so it doesn't mess anyone up).

T

TomD.inPDX

17-Peridot

This can be done with a sketch and patterned.

It looks like it follows a simple arc increasing diameters.

You can just 2 guide arcs and make the holes tangent.

P

ptc-4890452

Author

1-Visitor

Ah, I see.
My mind was stuck on the fill pattern, but I can see how it is possible with a sketch and a pattern around the center axis. I'll give it a try.

Thanks.

-----------------

Quick and dirty test:

It needs some adjustment to look more like the pattern on the nest, but it's definitly possible. Thanks for the help.

D

DavorGranic

16-Pearl

Maybe:

pattern1:Arc with holes increasing in size as they go outward

pattern2:revolve pattern 1

P

ptc-4864603

1-Visitor

you could create that in less than 5 minutes with grasshopper3D

heres a similar example done in it.http://bit.ly/1kfaVgv

Isn't it basically offset circles from the corners of a square with points on the intersections?

T

TomD.inPDX

17-Peridot

Its not fibronacci... more like spirograph with control of a common web thickness.

It wouldn't be hard to duplicate by using the image as an underlay and finding the right guide arcs.

It is a very nice industrial design application.

Esben, looking at yours, it is "drifting"? I was thinking you need to look at the mirror to see if it overlays correctly in both directions. I haven't tried it yet but I may give it a shot just for fun.

P

ptc-4864603

1-Visitor

Here's a more examples in Grasshopper with a grab of how you would do it in there. You might be able to look at the nodes and extract an idea of how to do it. I could give you more info if you have any questions, I'd give a detailed response now, but I don't have time.