Two-circular-arc cam generator by Knochi

Last crawled date: 4 years, 8 months ago

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 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
This alters the relationship of the base radius to the top radius
lambda=r2/r
Psi
This alters the relationship of the travel to the base radius
Mu
This alters the angle of the 2nd arc (well it's a bit more complicated)