Lawnmower+stake+rope=Analog robotic lawn service

posted Apr 26th 2010 3:04pm by
filed under: home hacks, tool hacks

[Kirov], a regular reader and one of our most notorious commenters, tipped us off about this lawn mowing hack. On one hand we’re wary that this is bait for a huge flame war, but on the other hand it’s a hack that brings a smile to our mischievous faces. By pounding a stake into the center of the yard and connecting a mower to it with a piece of rope, [Korey99] has achieve an automated lawn mower. He tied the self-propelled mower’s throttle bar down to make the machine run unattended. There’s no kill switch or any kind of remote control for the lawn mower so we wonder what happens when the rope gets all wound up?



74 Responses to Lawnmower+stake+rope=Analog robotic lawn service

  • Voice of Wisdom says:

    Fail

    Actually a pretty cool hack.

  • The Manatee Miltia says:

    Awesome. I half expected to see a kid or a dog walk into frame.

  • MadAndy says:

    This was in Popular Science or Popular Mechanics a million years ago. Maybe 30 years ago. Geeze I’m old.

  • Dan says:

    “If the women don’t find you handsome, they should at least find you handy.”

  • Csae says:

    Yeah i remember this being a pretty old hack on TV.

    Wonder if one can get sued if a dog happens to walk into the yard and meets the machine… i would imagine smart animals would survive it without a scratch but i can see some annoying little yap thingy meeting it head on….

  • Darkfibre says:

    MadAndy: You are quite correct: It was Popular Mechanics, the Dec 1948 issue, 3rd item on page 161.
    I remember it clearly now. :)

    http://books.google.com/books?id=NtkDAAAAMBAJ&pg=PA161&dq=lawnmower+spiral&lr=&as_pt=MAGAZINES&ei=RhLWS5_oAoWOzASOhKHaCQ&cd=2#v=onepage&q&f=true

  • Hirudinea says:

    This is a lawsuit waiting to happen.

  • PsyKotyk says:

    Lovit. Simple and it works.

  • vonskippy says:

    Wonder if he used math or Tlar to figure out the diameter or the center rope winder.

    As others have mentioned, that “hack” probably occurred the day after the first self propelled mower hit the streets.

  • Bob says:

    There I fixed it ;)

  • anon says:

    and your serious,

    a mower on a rope.

  • B1rdm4n says:

    This is awesome. I’m not concerned about the safety, but cutting the grass in the same lines is not good for it…

  • Jtaylor says:

    OK, if he is using this it’s probably obvious that he doesn’t care about the grass…most likely he is like me and views it as a nuisance. I say burn it all and pour green tinted concrete…..

  • dooglehead says:

    Wasn’t there a TV commercial recently with a lawnmower tied to a stake, just like this.

  • legendeveryone says:

    My next door neighbor has been doing this for years. I thought as a kid that he must’ve been a genius, but now I see that he probably got the idea from Popular Mechanics

  • T313C0mun1s7 says:

    @B1rdm4n Naw, next week just move the stake over a foot.

  • Kurt Neufeld says:

    Seeing as most properties are square it won’t get your entire yard, and that stake has to be well driven in otherwise the neighbor’s cat is going to get a haircut. But otherwise it’s a simple yet ingenious hack. Good work!

  • Kurt Neufeld says:

    Also I’m certain that if you know how long it would take for this contraption to mow your lawn down to the second you could figure out a way to release the throttle bar just in time. Frozen Rubber bands that you know will only last for so long, or some robotics maybe.

  • haineux says:

    What will happen when the rope runs out?

    A) Nothing, the mower will just sit there, perhaps spinning its wheels.

    B) The mower will manage to rip the stake out of the ground and continue in a straight line until it hits an obstacle.

    My bet is for A then B. I don’t think it’s likely at all that the mower runs out of gas.

  • Luke says:

    True hackers do it the lazy way!
    Seriously though it is great.

  • Commander Dave says:

    I remember this from an old movie or TV show where a kid(?) was an inventor… but for the life of me, I can’t remember what it was.

    I do remember thinking how cool it was and how much I wanted to try it, but alas, we didn’t have a self-propelled mower in those days!

  • Stpq says:

    What if it unwound itself from the stake, and, in addition, had a slightly shorter length of rope that tied to a sort of clamp that would work its way off as the mower got too far away? Thus, enabling it to turn itself off when its work was finished.

  • supershwa says:

    @dooglehead – yes, the commercial you’re thinking of was by Discovery Channel, which related to their “I love the world” commercial. The actor was singing the song, while hammering a stake into the ground, tying a rope up to his mower, then kicked back in a lawn chair while the mower did circles in the yard.

    I didn’t know about the Popular Mechanics reference (then again, I wasn’t around in 1948…)

    Mike — you pullin’ a Krafty Caleb? ;P

  • Tyler says:

    Diameter of the post=(Diameter of your mower deck MINUS 2 inch overlap)/pi

  • dooglehead says:

    @supershwa – Yes! that was the commercial I was talking about. I remember it now.

  • greycode says:

    Hey Wile E. Coyote! Put the ACME catalog down and step away from the lawn mower! You know this is going to end with you missing a lawn mower sized strip of fur up the middle of your back.

    No matter how many times you watch the cartoon, it always ends the same way.

  • kirov says:

    Would be better if it had some kind of throttle throttle control to kill it when it got to the end of the rope. I suppose it moves at roughly the same speed and it would be very simple to attach a timer to turn it off after a couple of minutes so you could set it and come back later.

    Or you could go the high tech route and get some sort of proximity sensor to shut it off at exactly the right time instead of ballparking it, but that doesn’t mesh as well with the ghettofabulous stake and rope nature of this hack.

  • fanulous says:

    That is absolute genius.

  • gcat122 says:

    The CIRCUMFERENCE of the spool should be less than the mower swath. And the rope wrap makes it change as the lawn gets mowed. Fun! Add a kill switch and watch for safe operation and wandering darwin candidates.

  • Nate says:

    This was on the Red Green show and I’m sure other places, not really that innovative of a hack.

  • 24601 says:

    Just figure out the mower’s fuel consumption rate, then give it just enough gas to get to the center post, where it runs out of gas and dies. too easy.

  • bemis says:

    As I watched the video all I could picture was “Towlie” of South Park fame, eyes blood shot with a joint clutched between index finger and thumb just a few inches from his mouth saying “This is a really good idea!”

  • BigBubbaX says:

    Being able to remote control a lawnmower still appeals more to me, but a thrifty hack nonetheless.

  • namek303 says:

    Hmm I will throw 30 of these on eBay.

    First bid $20

    Automated string and stake set for modding lawnmower for autonomous use.

    *lawnmower not included.
    **may cause injury or death if used while unattended.

  • Tane says:

    I love the simplicity of this!
    @ Kurt Neufield – the simplest solution to all of these problems is to just give the mower exactly the right amount of fuel, so that it runs out when it hits the center. :)

  • Anon says:

    Hurrrrrr look at me, I’m posting hax.

    Jeez I know you were trying to start a flame war as you said, but c’mon, get with the times.

  • musso says:

    Shutting it off is too simple… use and electrical mower… wind the power cord up with the rope and have the mower go from the inside out instead of the other way round… when it gets to the end it’ll unplug itself. The gas powered equivalent would be to tie a string to the gas line leading to the mower’s carburetor.

  • Mav says:

    You can tell a load of Americans hangout here
    “This is a lawsuit waiting to happen”
    God I hate the American attitude to Sue everyone and anyone for anything.

    Blame the State and Sue them for putting up a lamp post you walk into as its their fault for putting it there ! When really its the dumb asses fault for not watching where their going thats what EYES are for.

    My view would be this… A little yapper goes onto my lawn and gets turned into mince meat by this sort of madcap contraption.
    It’s the owner fault for not keeping it on a leash as it shouldn’t be on my property in the first place.

    FLAME BAIT :D

  • PKM says:

    All the people wondering how to shut off the mower at the appropriate point- this is not a hack for leaving unattanded, this is a hack for watching from a lawn chair with a beer, basking in
    a) sun
    b) your own inventiveness

    When the mower finishes, you get up and stop it.

  • captain obvious says:

    Accurate and simple kill switch is not difficult and does not require retardedness like proximity sensors. Add a bumper switch to the side (think the front of a roomba) that will hit the spool when it is all wound up and have that switch ground the coil.

  • James says:

    Doesnt work on my triangular garden, I now have no bedding plants… :)

  • Richard says:

    I think I’ve seen Goofy do this in a Disney cartoon.

  • davo1111@work says:

    Awesome, but there is no arduino :(

  • strider_mt2k says:

    Now THIS one is SURE to back up into the mains and killaguy!

    AAAACK!

  • theodore says:

    This is how the robot uprising starts! LOL

  • Dubious says:

    Is it me, or is that mower really – really fast? I was going to say it was sped up video, but the pitch of the audio was about right.

    hmmmmm.

  • Dubious says:

    Oops. Duh. Just watched on Youtube, video sped up by 4x. Guess I got to clean my ears, or have more coffee.

  • adam says:

    if only i had a circular backyard this would be perfect!

    looks like it wraps inwards so at the end its just going to get stuck around the stake, relax grab a lemonade and watch the mower do the work (and make sure it doesn’t run over anything)!

  • Cynyr says:

    @Tane
    Simpler yet is to give it to your kid and have him do it. No extra expense needed, if you happen to have a child of the right physical and mental abilities needed.

  • DrDoug says:

    @adam, http://smithsrus.com/lazy-lawn-mowing/ about 25 seconds in, but i think he’d got a beer

  • Awesomenesser says:

    I love the ads. Just to let you know for only $5.00 ($44 today) you can let your kid cast little toy solders out of lead (Page 311). Yay lead

  • beakman says:

    I saw this very hack YEARS ago on TV. Some story about an old fellow that did all sorts of stuff like this. He had a plane (hell, he might have built that too — can’t remember) so he had a grass runway for it. He had a series of “sockets” down the center of the runway to hold his bar/spool setup. He had some sort of kill switch figured out to cut it off when it ran out of rope/cable. He’d fool around in his shop or whatever while the mower ran. When he heard it stop, he’d go out and move it to the next socket.

  • M4CGYV3R says:

    Absolutely hilarious. The ultimate lazy man’s hack.

  • jdog says:

    nothing could go wrong with this. nothing at all.

  • zzz says:

    looks like he could use a slightly larger post

  • Gabriel Dibble says:

    (: award for new way to make crop circles

  • This isn’t new…

    I’ve seen the same done with a horse. I don’t know which is more dangerous.

    The horse also seems to have sufficient intelligence to avoid winding it’s rope up during the mowing process.

  • nubie says:

    Bend the front wheels to approximate an ackerman angle http://home.howstuffworks.com/synchro-steer1.htm

    Also you can accomidate safety and auto-shutoff by making a simple front bumper that kills the engine, possible by shorting the spark plug to the chassis/engine case (older engines sometimes had a metal strap poised above the spark plug for such a purpose).

    Place a movable plywood wall where the mower should stop.

    4. Profit (or beer I guess)

    Bonus points for installing a round border to your yard to end trimming. Plant roses or flowers in it and pretend it is a planned garden. Add “peeing kid” or “topless unarmed lady” birdbath for the mower to start from, that way you don’t have to ever pull up the stake in the middle.

  • Mike says:

    “we’re wary that this is bait for a huge flame war”

    Whatever. This is an awesome hack. Just um, don’t leave it unattended?

  • Cole says:

    Why not just buy a goat and let him do his thing. That is a truly automated lawn mower.

  • Kirov is a pussy for not letting the video play out until it got to the end!

  • Hacksaw says:

    The farmer on Sean the Sheep did this in “The Goat” using well…A Goat! I did it 25 years ago in my back yard had a string tied to the plug wire so when it wound up all the way it pulled the wire off.Cost me a shoe and a baseball also lost 3 months allowance replacing the neighbors window when the golf ball that I didn’t know about took flight

  • Alan Parekh says:

    This is great. Too bad the video wasn’t a bit longer, I wanted to see how the thing was stopped. I can see it being a bit hard to tame at the end of a cut. :)

  • Sigg3 says:

    “There’s no kill switch or any kind of remote control for the lawn mower so we wonder what happens when the rope gets all wound up?”

    You’re not seeing the big picture here, also featuring the porch and the proud owner crushing beer cans. By the time the mower hits the pole it’s about time to replenish the beer supply anyway.
    He probably timed it too!

  • Roly says:

    @Cole – “Why not just buy a goat and let him do his thing.”

    Not had a lot to do with goats then? :))

    After mowing a paddock with a slasher I can testify I would rather follow this around just to avoid the vibration. An oldie, but a goodie.

  • Groug says:

    So that’s how crop circled are made!!

  • jamieriddles says:

    OMG! Its ingenious!
    (no sarcasm intended)

  • Lanny says:

    When the rope runs out, this happens:

  • Frogz says:

    FOLLOWUP! now has auto shutoff

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