I actually enjoy mowing, usually. But not when its 98 degrees like today. I just hate everything that goes with it- spilling gas, oil changes, deck lubrication, clogged carbs, flat tires, decks getting out of level, etc. I've got a pool with a mini fridge full of beer I could be enjoying instead. My main concern about robot lawnmowers is safety. I live out of town in the country. Is the mower going to run over a rabbit nest? Is the mower going to wander into the road? Is it going to get stuck on the neighbors ugly farm fence? Is some kid gonna get their foot cut off if he gets curious? Plus my yard isn't exactly level or smooth.
Probably this needs a separate thread, I’ll start an automower appreciation thread when I get a minute later on.
Answering for our husky, but probably similar for others:
- the mower does bump detection, so any objects like trees, sheds, fences, your foot, the dog, get bumped off and sit stops, turns direction and sets off again. It does make the dog jump a little, but otherwise no harm. The mower can still get stuck, so if there’s a 3x3 resting on the lawn, low enough to go under without tripping the bump, it can ride up on it and get stuck, it can also get stuck under stuff like lawn chairs - I once saw it making off with a lounger like a turtle. I don’t know what rabbit nests are like, in the uk they live in holes in the ground, and depending on the size/scale you might have issues with the mower getting hung up, we haven’t but don’t have any big rabbit holes, just the odd little one.
- almost all automowers use a buried boundary wire (“loop”), which the mower detects and will not cross, so it won’t set off for Kansas, similarly if installed correctly it’ll stop before it hooks on your neighbour’s fence (assuming it wouldn’t just bounce off it anyway). The top of the line mowers (for golf courses, schools, mansions) are starting to use a corrected gps signal to avoid the need for this. We paid a dude $300 to install the mower and boundary wire with a cable laying machine, ran it around the perimeter and any shrubs that the mower might have got hooked under. Since then Mrs F121 has moved, shortened, extended the wire as she remodels the yard.
- the husky uses three tiny blades, like a Stanley Knife blade, but double sided, that are mounted in a spinner and pop out with centripetal force. When not spinning, they just pop back in if you push on them, when the machine stops, gets lifted, can’t find the loop signal, bumps into something, is going to charge, etc, they stop spinning. Maybe if a young kid lay in a slight dip in the lawn with their arm flat on the lawn pointed in the path of the mower, they might get a small cut? Pretty theoretical, none of the dumb kids have managed to sever anything yet, the biggest casualty of ours was a roll of duct tape I left on the lawn (because I’m an idiot). We change the blades every 6-8 weeks or so, for about $10.
The mower copes well with undulations on our not-great lawns, and handles slopes well, they do a 4x4 one for ridiculous slopes but most people don’t need it. One slight issue is that because it’s a much smaller area cut in one go than our ride on, it doesn’t average the lawn length out over dips, instead it tracks the undulations so you notice it a bit more.