In a previous thread I mentioned I was working on a "real" Sketchup drawing - versus just playing around. I picked up a copy of Making Mechanical Marvels in Wood by Raymond Levy. It's a neat book and has plans for a number of models - kinda sorta.
I thought this was a perfect opportunity to really learn Sketchup in more detail. Things like scanning, then importing printed templates from the book and creating them in Sketchup, follow me, making components so I can use some parts in subsequent drawings etc.
It took a bit of doing, but I finally got the piece built and assembled. Had a bit of an issue with follow me kind of going flaky on me instead of closing. I made it work, but I need to figure out what I am doing to insult the programming.
Anyhow, here's the model from SU. I guess I should have a pic of it from the book. This model demonstrates turning rotational movement into verticle movement with some dimensional control via the cam profile. Simple, but good exercise. Turn the cam and the cam follower will move up and down based on the cam profile. Simple machine to start with.