I wanted to try making a wooden slide rule. I wrote a program to draw the rules and used a three ply construction to capture the slide.
My first attempt is not a complete success: the ticks are too dense at some points to be useful, the assembly is fiddly, and my first idea of just using registration pins and glue didn’t work out (I ended up using wood screws through the registration holes). There isn’t a cursor yet. Maybe a box-style construction would be better.