Two-circular-arc cam generator

I want to drive a mechanism with a cam, and as cams are quite complex things, i thought doing a cam-generator might be a good idea.

So I read about cams and found the 2-circular-arc cam as a first "simple" approach. The work from [Emre Arabaci](https://ms.copernicus.org/articles/10/497/2019/ms-10-497-2019.html) shows an approach of dimensionless variables to specify the design of the cam only by giving the desired travel and three variables.

So i fired up openSCAD to make a two-circular-arc cam generator.

One can give the desired travel (sMax) and play with three parameters to alter the shape of the cam:

Lambda
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This alters the relationship of the base radius to the top radius
lambda=r2/r

Psi
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This alters the relationship of the travel to the base radius

Mu
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This alters the angle of the 2nd arc (well it's a bit more complicated)