cross-posted from: https://programming.dev/post/36230046
Let’s be honest: The current generation of robotic lawn mowers sucks. Basically all of these bots drive in a random direction until they hit the border of the lawn, rotate for a randomized duration and repeat. I think we can do better!
Therefore, we have disassembled the cheapest off-the-shelf robotic mower we could find (YardForce Classic 500) and were surprised that the hardware itself is actually quite decent:
- Geared sensored brushless motors for the wheels
- A sensored brushless motor for the mower motor itself
- The whole construction seems robust, waterproof and all in all thought through
- All components are connected using standard connectors, therefore upgrading the hardware is easily possible.
The bottom line is: The bot itself is surprisingly high quality and doesn’t need to be changed at all. We just need some better software in there.
You can’t compare indoors and outdoors directly. I think random has its means in an uneven environment. It simply doesn’t matter if the odometry sucks, if the wheels stick in muddy earth or small sticks block on side.
Advanced sensors such as GPS and cam isn’t very precise outdoors. That’s why newer models come with its own positioning sender.
I was mostly talking about roombas/indoor. For outdoors you have GPS with RTK which most mowers use that work without a boundary wire, afaik.