This is a single axle with a hub that mounts to our 6 inch tires. The end opposite the hub is bored to fit an 6mm shaft. It is intended to be direct driven by our IG32 motors. The hub is welded to a steel 1/2" diameter shaft.
Beacons are mounted on walls or ceilings to measure distance to other beacons and “hedgehog” using ultrasonic pulses. They communicate with router wirelessly in ISM band. Powered by LiPo battery or USB. Indoor Positioning System (IPS)