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Building a remote control mower

Discussion in 'Electronic Basics' started by Nick Huckaby, Mar 5, 2005.

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  1. Nick Huckaby

    Nick Huckaby Guest

    We are building a robot mower so we don't have to bear the cold
    winter. I have a 120V AC mower and a gas powered mower that cuts
    a leveled 20'x40' grass field perfectly fine. I have a remote control
    and a receiver capable of a hundred meters that can switch a relay to
    get a DC motor to go in forward or reverse. I also have two 8-Amps DC
    motors and two indrustrial drill AC motors.

    We've never built a mower like this before so we don't know if we should go
    with AC or DC motors or know the best way to transfer power to the
    wheels. How should we begin building a robot grass cutting mower?

    Thanks
     
  2. carl mciver

    carl mciver Guest

    | We are building a robot mower so we don't have to bear the cold
    | winter. I have a 120V AC mower and a gas powered mower that cuts
    | a leveled 20'x40' grass field perfectly fine. I have a remote control
    | and a receiver capable of a hundred meters that can switch a relay to
    | get a DC motor to go in forward or reverse. I also have two 8-Amps DC
    | motors and two indrustrial drill AC motors.
    |
    | We've never built a mower like this before so we don't know if we should
    go
    | with AC or DC motors or know the best way to transfer power to the
    | wheels. How should we begin building a robot grass cutting mower?
    |
    | Thanks

    1. How can you get AC power to the mower without it being wireless? If
    you plan on using a wireless system and AC motors, then you have a lot of
    electronics learning to do first.
    2. What happens if the batteries in the receiver go dead? Will it just
    mow right over your neighbors cats?
    3. A receiver that can switch a relay for a DC motor is highly unlikely
    strong enough for a high current DC motor from a cordless mower. You will
    need a second, more powerful relay/contactor for that job.
    4. Get on some robotics forums and groups and learn a lot more. RC
    groups are good, but in this case, there's a lot of crossover and more basic
    robotics than RC.
    5. RC servos can be modified to run as motors with proportional
    control. A pair are popular for robots, but if you go for motors big enough
    for your robot you need to go with purpose built designs. Visit
    surpluscenter.com for a couple useful drivetrains.
     
  3. Clint Sharp

    Clint Sharp Guest

    Sound's like an ideal selling point for me, maybe you could upgrade it
    to seek and destroy? Especially for evil faced black and white cats that
    *do NOT* bury their crap after they've left it in my garden every day.
     
  4. WoofWoof

    WoofWoof Guest

    You can cut grass in your "cold" winter?
     
  5. Lane

    Lane Guest

    Sound's like an ideal selling point for me, maybe you could upgrade it to
    A seek and destroy for those pesky moles that leave hills all over my yard
    would be idea. I'd buy it.
     
  6. He already has the remote control snowblower.

    --
    Regards,
    Robert Monsen

    "Your Highness, I have no need of this hypothesis."
    - Pierre Laplace (1749-1827), to Napoleon,
    on why his works on celestial mechanics make no mention of God.
     
  7. Chris W

    Chris W Guest

    In electric RC cars, the same battery that spins the wheels powers the
    receiver, and the wheels stop spinning long before the battery is to low
    to power the receiver. The real question is, what happens if it goes
    out of range or there is some kind of radio interference?


    --
    Chris W

    Gift Giving Made Easy
    Get the gifts you want &
    give the gifts they want
    http://thewishzone.com
     
  8. jim dorey

    jim dorey Guest

    for completely wireless i'd suggest you use the gas mower and an
    alternator. you pull the starter cord off and you can usually bolt a
    spool to the top, add a pulley under the spool and you have a place for
    the alternator to go, which of course means you'll use dc(though not
    necessarily).
     
  9. ff

    ff Guest

    RC receivers have a failsafe mode that they go into if the transmission
    is interupted. For example my plane's receiver is preprogrammed to idle
    the engine and circle left until it gets further instructions (or it
    hits the ground)
     
  10. Rich Grise

    Rich Grise Guest

    Remote Control Mower?

    Like this one?
    http://www.flyingthingz.com/videos/Whatisit.mpg

    Cheers!
    Rich
     
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