Th rollers shown below are to allow for resistance reduced change of direction of the cables that will turn the heads of two owls. The cables will serve to control the turn of the heads. One roller guides the cable to be pulled by a follower and the other guides the cable connected to the counterweight. The wooden blocks are made of poplar and will be glued to the underside of the top plate. The rollers are turned from a piece of birch dowel and the axles are 1/8" diameter brass pins. The hole in the roller is 9/64" so it rolls freely on the shaft. I made these rollers with my small Sherline lathe, but they could be made from glued, assembled disks since they do not need to be precise to do the job required.
Automata is a creative blend of my life interests , engineering, art and woodworking.