No wires, no rails — today's robots steer by satellite, cell signal, cameras and lasers. Here's the whole system, explained with the same tools we use to check real lawns.
Your phone's GPS is accurate to a few meters — useless for mowing stripes. RTK (Real-Time Kinematic) adds a correction signal from a fixed base station that knows its exact position, cancelling out atmospheric error. Result: the mower knows where it is to about an inch.
The catch: it needs to see the satellites. Trees, roofs and fences block the signal — the dial shows how a real yard loses satellites (hollow dots) behind tree cover. Fewer than ~12 usable and the robot pauses or wanders.
That's why the first thing we check on any lawn is the sky above it — zone by zone, across the whole day.
Two ways to get that RTK correction signal — and one of them depends on your cell coverage.
A small antenna on your roof or dock broadcasts corrections directly to the mower. No internet needed once it's set up.
Corrections arrive from a regional station network via cellular data. No antenna to install — but now your mower's accuracy depends on the bars in your back yard.
This is why we model cellular strength per zone at your address — it decides which setup we recommend.
AI vision is an onboard camera + neural net that recognizes grass, beds, toys, hedgehogs and hoses in real time — it keeps mowing accurately through spots where RTK drops, and stops for anything that shouldn't be mowed.
LiDAR spins a laser to build a 3-D map of its surroundings — like the dial on the right, but in points. It works in the dark and under dense trees, which is why LiDAR models are the pick for heavily shaded yards.
Most 2026 mowers blend all three: RTK for the map, vision for safety, LiDAR for the shadows. The right mix depends entirely on your yard — which is the whole point of checking first.
Each dot = a laser return. Thousands per second become a live 3-D obstacle map.
Robots don't mow like you do. Instead of one heavy weekly cut, they trim a little on several days — clippings vanish as mulch, and the lawn always looks fresh.
Mow days alternate with rest days held for rain. The robot leaves its dock, cuts until the battery runs low, returns to recharge, and goes back out — all unattended. Battery packs are rated in charge cycles, so a lighter schedule literally makes the battery last more years.
Your satellite sky, your cellular, your mow times — free, in about two minutes.
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