Designing an omni wheel robot platform with Arduino
Omni wheels are devices that look like wheels with extra rollers positioned along their circumference. This allows robots to move forwards and backwards, as well as slide and spin depending on how the wheels are powered. Maker Jeremy S. Cook decided to create his own version, and after some consideration and careful design work, constructed a cylindrical frame out of MDF and PLA.
The Roomba-like unit features an Arduino Nano, which controls four NEMA 17 stepper motors via Easy Driver boards, while a Bluetooth module enables smartphone operation. Once a few intermittent motion issues are worked out, the stepper motors should provide precise positioning for further robotics experimentation.
Code for the build can be found here.