Robot mowers

[dieselscout80]

One thing I have a question about is how the RPM of the blades compares to the blade speed of engine driven mowers?

I think high blade tip speed equals cut quality.

 

[Rdrcr]

And its on sale for $2200 last day today.

Lymow One - Robotic Lawn Mower with Brain and Brawn

Lymow One delivers hassle-free mowing without perimeter wires, using RTK-VSLAM for precise navigation and smart obstacle avoidance. Its tracked treads handle tough terrain, while the dual-blade mulching system powered by 1200W motors ensures a clean cut on any grass. Perfect for modern...

www.lymow.com

At $2200 it’s really tempting. I’d probably buy one if I knew it could mow somewhat rough terrain on my property with reasonable results. I like the idea, I’m just not sure it would work on my property. Plus, I’d love to see a triple blade option for a better/more consistent cut.

Mike

 

[Torvy]

One thing I have a question about is how the RPM of the blades compares to the blade speed of engine driven mowers?

I think high blade tip speed equals cut quality.

That axiom works when dealing with traditional mowers that are essentially cutting with a relatively dull piece of iron.

My understanding is these have much thinner, much sharper steel blades. It's more like shaving than mowing.

 

[dieselscout80]

That axiom works when dealing with traditional mowers that are essentially cutting with a relatively dull piece of iron.

My understanding is these have much thinner, much sharper steel blades. It's more like shaving than mowing.

Thanks

 

[quicksandfarmer]

I have some experience with RTK, which is the technology that the Lymow uses. See this thread from a few years ago where combined RTK with mapping for field layout:

Using GPS to lay out a field

Recently npalen started a thread (https://www.tractorbynet.com/forums/build-yourself/423698-any-electronics-gurus-out-there.html ) on using a laser level to automate a box blade. I talked a bit in that thread about using differential GPS (or DGPS) and I thought it would be worthwhile to do a...

www.tractorbynet.com

Based on what I know about RTK, and what I've read about the Lymow, I'm super impressed. In my experience using RTK and GPS I could pinpoint location to within about half an inch. If they're able to get that working on a lawnmower it's a powerful combination.

 

[newbury]

That axiom works when dealing with traditional mowers that are essentially cutting with a relatively dull piece of iron.

My understanding is these have much thinner, much sharper steel blades. It's more like shaving than mowing.

Does that mean we have to keep them razor sharp?
To me that's an advantage of trimmer line if they can solve the "advancing the line" problem.

 

[Torvy]

Does that mean we have to keep them razor sharp?
To me that's an advantage of trimmer line if they can solve the "advancing the line" problem.

No clue how often they need to be sharpened (more likely replaced). I would guess about like shaving.

The line is heavy, comparatively. That's not good for battery life. The line doesn't cut better.

My earlier comment was more about if you use a string trimmer on uneven ground, you can adjust the angle to cut it relatively evenly.

 

[Fixastuff]

The thing to remember about current robo mowers. They don’t operate like you would with a z turn. You’re not going out and knocking inches off the grass weekly. They are made to run so often the grass always looks the same.

I don’t know about rough ground the yard I’m using it on is pretty smooth but has steep slopes. This thing is mowing areas where it’s hard to walk with a weedeater!

 

[Fixastuff]

This mower uses “traditional” type blades the others I’ve seen use a wheel you bolt regular two sided razor blades too.

 

[jwmorris]

I took this video of one the builder was nice enough to invite me over and show me how he made it and set everything up.

There are a number of folks who have built them using ardupilot for creating the path.

Best gear for starting ArduPilot Mower

Hello, My name is Jan and I would like to start experimenting with Ardupilot. My question is about the best gear (possibly budget to mid-range gear) to be able to create Gps Mower. I plan on using two servos to be able to convert my Toro 32 mower to an autonomous one. To my knowledge and...

discuss.ardupilot.org

Planning a Mission with Waypoints and Events — Rover documentation

ardupilot.org

Creating lawn mower grid missions with reversing back and forth

Yes. At the scale you are mowing, a lack of correction data would result in significant deviation from the desired path.

discuss.ardupilot.org

For ditches and rough spots, this style might be a better choice.