2D / 3D measuring system

youmagine

I came across a design from fablab_ruc_dk, but without any encoders on hand, I decided to play around with some old mice and optical end stops before ordering them from China. The holes are the perfect size for 6mm Shaft 600P/R Incremental Rotary AB phase Encoders, and the extra wheels with 120-degree holes are there to mount laser-cut encoders. I haven't created any mounts yet for the mouse innards or opto endstops because this part is an experimental hack; another thought was to try high-grade, high-precision potentiometers in a potential divider circuit then use ADC inputs on the Arduino. So here's my re-design: the encoders are based on a 0.15mm to 0.17mm laser kerf and are at 2-degree spacing - any closer would leave nothing left. I added an Arduino mounting area so it's all kept together on one platform. Original design can be found at http://fablab.ruc.dk/diy-digitizer/. For mouse repurposing, check out these links: https://sourceforge.net/projects/mousesensor/files/, http://thedenneys.org/pub/robot/encoders/, http://ferretrobotics.blogspot.co.uk/2011/01/interfacing-optical-mouse-usb-with-pic.html, http://www-bsac.eecs.berkeley.edu/~sbergbre/research/publications/OpticalMouseHack.pdf, http://diy3dprinting.blogspot.co.uk/2015/05/diy-contact-3d-scanner-with-arduino-and.html, and http://www.wildcircuits.com/2013/03/optical-mouse-hacking.html.