| Project
date: started July 2007. I am building a rotary encoder (or shaft encoder) for a robotic project. This is a device that digitally measures an angle of rotation. Or, if you configure it so that it stretches out a length of line like a tape mesure, it can measure distance. First, I needed some gray code patterns on plastic. Having those, I printed a 7-bit version (that's all the precision I need for my project) on a transparency at FedEx/Kinko's ($0.75US per copy), and cut it out with scissors. Then I cut out a plastic disk (using my Bosch jigsaw) to match the size of the overlay Then I peeled off the protective blue covering and placed the overlay on top My next step is to build the optical encoder overlay for the disk. |
