From prototype to production
WOI Robotics is developing the robotic weed eater through a series of progressively refined prototypes. Testing includes drive performance, trimming performance, stability, electrical systems, safety features, structural durability, instrumentation, and manufacturing methods.
Prototype 1
The first prototype had a single small wheel in the front with the weed eater in front of that. Initial testing demonstrated that there was way too much up and down motion in front, so the height of the weed eater varied dramatically. So we decided to build a second prototype with 2 larger swivel wheels and move the weed eater to the other end.

Prototype 2
The second prototype performed much better in initial testing. However, it is too heavy on the weed eater drive end.
The initial testing is being performed using a remote control.
