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HelicopterOff Topics › RC lawnmower?
09-10-2007 08:59 AM  10 years agoPost 1
MX400 DUDE

rrApprentice

Oklahoma

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Hey guys I drove by a house today that had 1 of those automatic mowers and as soon as I got home I ran up the cost of those things $900.00+!!! not to mention I live on almost 2 acres and it would take it 2 days to mow the grass so I thought...How about build a rc mower. I'm throwing around some ideas and I figured I can get a used self propelled mower for about $100.00 or less then I need about 4-5 high torque servos and need to mod the front wheels for steering. Sounds like fun I don't know If I will attempt this or not but I think it would be allot of fun to do. Even if it isn't practical and most likely it isn't but the enjoyment of the first grass cutting would be worth it Any suggestions or ideas would be nice.

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09-10-2007 09:06 AM  10 years agoPost 2
Slipknoter

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London UK

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Maybe give it a go? If it doesn't work you can always use the servos for something else I think JR DS8911 or DS8711 would be the best option for servos, both High torque (25.0 Kg)

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09-10-2007 09:13 AM  10 years agoPost 3
MX400 DUDE

rrApprentice

Oklahoma

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I was actually thinking of using some futaba standard servos that have like 100ounces of torque simply because they are cheap. If this doesn't work I really don't want a hole bunch of cash in it. I think I can make this hole thing work of under $300.00

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09-10-2007 09:28 AM  10 years agoPost 4
Nick Jones

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anderson

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http://www2.towerhobbies.com/cgi-bi...p?&I=LXLWS8&P=0

http://www2.towerhobbies.com/cgi-bin/wti0093p?&C=MAG

Thats what i would go with, alot cheaper too. Since weight doesnt really matter....

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09-10-2007 02:58 PM  10 years agoPost 5
midwestpilot

rrElite Veteran

Crystal Lake, IL

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To get the steering to work

You need to get some big @ss servos... little ones will not take the abuse that the yard is going to give them.. and you need to make it turn the wheels sharply. This is going to be harder than you think with standard gear.

I would think you would need to make a basic rack and pinion set up or look into industrial servo actuators...

I know when I mow my yard the mower is bouncing all over due to the bumps in the grass (need to roll my yard) It will be quite stressful on the steering.

In life there is no spacebar!

Rich Erikson AMA 6175

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09-10-2007 03:17 PM  10 years agoPost 6
JEEPWORLD2002

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BLUEBELL PA USA

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best way to do it is to spike in the center and tie to the front tire then as the rope winds around the spike it pulls it in. I seen a guy near my house do it with a graden tractor. then he sits and watches it from his lawn chair in the shade drinking his beer nothing but rope and a spike.

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09-10-2007 03:24 PM  10 years agoPost 7
Darren Lee

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Woodstock, GA

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09-10-2007 03:26 PM  10 years agoPost 8
Rotor Trash

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Higginsville, MO

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09-10-2007 03:36 PM  10 years agoPost 9
legoman67

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Nanoose Bay B.C, Canada

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YOU CAN KILL SOMEONE, AN ANIMAL OR A ROSE GARDEN
LOL

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09-10-2007 05:28 PM  10 years agoPost 10
MX400 DUDE

rrApprentice

Oklahoma

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I would think 660oz of torque on steering would be enough, maybe not. I will look at some industrial type servos like they used on mythbusters to steer the full size cars.

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09-10-2007 06:14 PM  10 years agoPost 11
playfair

rrKey Veteran

Rochester, NY

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That wheelchair modded mower is pretty sweet!
I'd want failsafe with engine kill, and video telemetry would be nice to make sure you "stay on the line" since that's probably not so easy from across the yard (or around bushes)!
Remember, no aircraft frequencies here, though you guys will likely use DSS anyways!


The sky is our canvas

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09-10-2007 06:44 PM  10 years agoPost 12
MX400 DUDE

rrApprentice

Oklahoma

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Your right, keeping it going in a straight line will be tough but it can't be any harder than flying a heli LoL.

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09-10-2007 07:45 PM  10 years agoPost 13
Topher

rrVeteran

Rochester, Michigan

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This has been done many times. My school actually develops autonomous technology for robot lawn mowers. I would mount a camera on the front of it to make going strait a little easier. There is really nothing to it. Its the same thing as an RC car but with a huge blade underneath.

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09-10-2007 08:06 PM  10 years agoPost 14
OUCaptain

rrApprentice

Heli Addict Rehab Center

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Your right, keeping it going in a straight line will be tough but it can't be any harder than flying a heli LoL.
Nothing a heading hold Gyro wouldn't fix. Just make you set it properly. I don't want to see any threads about your lawn mower's tail wagging

"Human beings are viruses with shoes"

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09-11-2007 12:37 AM  10 years agoPost 15
MX400 DUDE

rrApprentice

Oklahoma

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Hahaha I hope my lawnmower's tail doesn't start wagging lol. Well I have done plenty of rc cars so I should be alright.
Topher do you have a suggestion for a camera? I was looking at some servos and I'm really not sure what I want but I do think 2 160oz servos should be able to handle it I have put my Futaba servos through hell and back without ever a problem. So Heres what I think I need,

* steering servos
* a couple more servos to work the hand controls
* some sort of receiver setup
* and maybe a camera? I think I can get away without a gyro for now although a cheap CSM might be in order.

Any other thoughts? Or suggestions? Oh yeah Isn't there a way to mod the servos so they rotate a full constant 360degrees and back the other direction?

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09-11-2007 02:54 AM  10 years agoPost 16
OUCaptain

rrApprentice

Heli Addict Rehab Center

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Oh yeah Isn't there a way to mod the servos so they rotate a full constant 360degrees and back the other direction?
Don't they have servo's for sail boats that do that. I think they use them for the winches so they should be pretty high torque.

Don't forget about the power system. I think it'll take just a bit more than a rx pack to run all the gear long enough to mow 2 acres. A big 6V gell or lead acid should do the trick. I've seen the 6V power wheels batts on clearance at Wamalart for $10.

"Human beings are viruses with shoes"

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09-11-2007 03:02 AM  10 years agoPost 17
OUCaptain

rrApprentice

Heli Addict Rehab Center

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Here's a mod for the servos and it only costs a couple bucks.
http://www.seattlerobotics.org/guide/servohack.html

Something tells me an R/C lawnmower isn't quite worth a gyro or anything. You might want a bit of expo to get the lines really straight.

"Human beings are viruses with shoes"

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09-11-2007 04:43 AM  10 years agoPost 18
Envision

rrVeteran

MI

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The last 'Farm Show' mag we get at work had an article on a guy that converted a riding lawn mower to remote control. It has a wireless camera on it... Uses a tv with picture in picture so he can watch tv in the air conditioning while controlling (mowing)from his recliner. I'll see if I can get a pic of the article tomorrow. The website won't let me get to it.

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09-11-2007 07:39 AM  10 years agoPost 19
MX400 DUDE

rrApprentice

Oklahoma

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That would be cool Streetwize id like to see it. OUCaptain thanks for the link, I will try it on 1 of my cheap servos first. I wish I still had that CSM gyro that I sold for $45.00 on ebay lol. Anyway I think this should be a really fun project. Oh yeah I just had another idea for controlling the steering, couldn't I use a high torque motor of some sort rigged with a speed controller setup on the rudder channel that way it centers when the stick is centered?

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09-25-2007 01:39 AM  10 years agoPost 20
nojohnny101

rrElite Veteran

10 miles north of Cincy, OHIO

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hey
how's the project coming???

Thanks
~Will-i-am~

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