Mechano is such a great prototyping tool!
Back up a step. I am working on building the Y-Axis for the CNC machine. My first attempt was to drill holes through the Z-Axis assembly, insert brass bushings and slide the Z-Axis assembly along hardened steel rods (from a printer).
Great in theory, however, both rods must be perfectly parallel. Unfortunately, they weren't. The binding was too much.
I've been thinking about how to create rails and run bearings along the rails as most CNC machines do. Looking at my junk, I started to think about the suspended ceiling tile track I have left over. Wondering how to build the trucks that would run along this rail, I spotted my Mechano set, and the lights came on!
A bit more scrounging around the shop, and I found some old curtain railings. Basically an I beam with mounting clamps. Again, Mechano to the rescue to create a lower truck that squeezes the rail and keeps the unit stable.
The assembly is a bit stiff. The next steps are to mount the threaded rod with the stepper and see how well it all works.