Update: I've posted a few more angles and a brief description of how it works on my company's channel: • Tripteron Robot - Simpler Than It Looks?
This is a proof of concept for an XYZ platform design built on top of a pair of Zaber Technologies linear stages. https://www.zaber.com/products/famili.... This specific implementation is original, but the kinematic design came from Laval university and the idea for a single long base axis came from @NicholasSeward.
The joints and platform I machined myself, and the linear stages and controls are off-the-shelf components. I work at Zaber so have access to stages and motors and controllers and CNC machines for prototyping ideas like this.