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 - Conquer Every Inch

World's First Robotic Lawn Mower with Rotary Blades. 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, efficient lawn care.

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.

 

[Fixastuff]

Map screen. Charging will pick up where it left off once charged.

 

[Doorman63]

Posting just because……

 

[Equatorial Malaise]

I'm very interested in these and looking forward to watching the tech develop.

Managing fields and trails with equipment is ok, but I'd rather have a robot do the standard grass cutting.

 

[otlski]

It’s out mowing in the dark right now. Pretty amazing.

I am trying to ascertain how it would do in soft, wet ground. I see it weighs roughly 85 lbs without battery. With battery say it tops out near 100 lbs. Roughly scaling the contact patch of the treads. Maybe 10 inches long by 4 inches wide each?

Can you verify weight with battery and tread contact area when you get a chance?

If my guesses are close then perhaps 80 sq-in of contact supporting 100 lbs would be a ground pressure of around 1.2 p.s.i.

I have areas where if I walk after rain, I might leave a 3 inch deep boot imprint. I am guessing I am 4 to 5 times the ground pressure. I suppose I will have to measure.

What about the front "wheels"? would they dig and plow though the soft ground without turning as designed in your opinion?

Can it mower in reverse where the tracks lead the cutting blade? Would this help me in the soft ground pulling the wheels instead of pushing?

Anyway, I know you just got it; so anything you could weigh in on would be appreciated. Thanks in advance.

 

[kf4uda]

I would be grateful for some updates occasionally. My 16 year old zero turn is constantly giving problems. I would consider replacing its duties with one of these if it holds out. I am mowing about 2.5 acres.

 

[Rdrcr]

I’m okay the first couple months of the mowing season but, once we reach the dryer end of the season, my allergies are raging. The thought of having a mower that can keep me out of the clippings and dusty mess, is attractive. However, I just don’t think one of these units is capable of mowing my rough property. I really need a demo. I considered pulling the trigger at $2,200 on the Lymow but, when I checked Monday morning, they had already increased the price. Not interested.

Though, as the technology and mowing capabilities improved, I’ll definitely be paying attention.

Mike

 

[Fixastuff]

Lawn is really look good after cutting it a second time at 90deg to first cutting.

At first it seems so slow but then you realize it doesn’t matter because it’s not you. Lol.

Still have a couple portions to map and want to change some of my first zones after learning its operational preferences.

 

[jwmorris]

I am trying to ascertain how it would do in soft, wet ground.

If nothing else there will be less pounds per square inch imparted into the ground without a full size human. If you can't walk on the ground, it might be sketchy.

For that and steep angles, I'd imagine one like this would work best.

 

[litework]

I have a small Navimow to get the small, fenced-in back yard [~1/8 acre] that I can't get with my finish mower. I had to push mow it and I absolutely HATED doing it mainly because it disrupted me from mowing the rest of my yard. So, I'd skip mowing it and my back yard looked terrible. I've only had the little robot mower for a month and I love it. It was easy to set up. I just mapped out the back yard using my phone and the mower and hit mow. I haven't really improved my original mapping so my mower can't get the entire back yard on one charge but I don't really mind. It gets about 80% of the yard, returns to the charger on its own and then goes back at it when it's charged enough. I don't even know it's running. It's extremely quiet. If it weren't for the extremely bright "search light" on the front, I'd let it run at night. As others have mentioned, I run it every other day to "maintain" the yard. I don't let it go a week. The yard looks great and I'm very happy with the purchase.

I'm going to wait a little while before I buy a larger one. I have a little place a couple of hours down the road that I don't get to go to very often...just day trips. It seems like all I get to do when I'm down there is mow the grass. Maybe a robot mower would allow me to enjoy the place a bit more.

 

[Fixastuff]

MoeMow has been great and yard has never looked so good.