You want recreate the shape faithfully?  Or you just want to make
something with roughly the same size and reproduce it's functionality?

I would make an octagonal wave spring, pretty simple.  Looks
like fun and useful...

I actually do need button battery cases, I only find one particular size
at the local supply, which addressed my need for now, but it maybe
worth having all sizes available.  Use copper tape for conductivity...

--
View this message in context: http://forum.openscad.org/Wave-spring-tp14948p14951.html
Sent from the OpenSCAD mailing list archive at Nabble.com.

Looks to me like a slight variation of the wave-cylinder.scad demo
from https://github.com/openscad/list-comprehension-demos :-).

ciao,
Torsten.

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use <scad-utils/transformations.scad>
use <list-comprehension-demos/sweep.scad>

r = 20;
w = 10;
s = 2;
step = 4;

shape = [[0,0,0], [w,0,0], [w,1,0], [0,1,0]];

path = [for (a=[0:step:360-step])
rotation([90,0,a]) * translation([r,ssin(a3),0])
];

sweep(shape, path, true);

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