Thanks for the article. It's interesting to see a bit insight into what they were thinking. Yes, 10% of the 7m mower market would be a good goal, but not when...
I don't believe that GPS has the fine resolution required for mowing where an error of just a few inches could place the mower in the path of road traffic in...
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Dan Barclay
Dan@...
Nov 2, 2009 11:37 pm
You are correct, GPS won't do it. Part of one of my perimeters is alongside my pool. and I don't have a pool deck! The edge of the pool is two bricks wide...
I've looked at the problem for awhile. Even the best "differential GPS" (which means they use one of the publicly broadcast radio signals for corrections)...
... No it doesn't. Another alternative is to bolt three fixed transmitters around the house and triangulate off of them. That would give enough accuracy....
I have an RL 500 that is for sale along w/ a new in the box stake system. I was going to stake the yard this year, but my yard has some large trees with big...
Can anyone point me to where I can get a gear case for my RL500. Maybe any needed software updates as well? Ole' yeller is runnin fine, just needs some fine...
Thanks for the article. It's interesting to see a bit insight into what they were thinking. Yes, 10% of the 7m mower market would be a good goal, but not when...
Hardcoding safety protcols into the board leads to a board redesign which costs FR money in R&D. If friendly robotics is trying to license the technology to...
I agree, pure GPS is too general. Hopefully they'll upgrade the satellite system in the near future to correct for this variance. However, you don't need GPS...
You are not taking into consideration obstacles. Three transmitters is not sufficient to triangulate a full yard from. Austin ... From: jabraham@... ...
Actually, generally no. Because the speed of light is extremely fast, most of the problems are in timing the signal and have little to do with the satellite...
16560
Dan Barclay
Dan@...
Nov 3, 2009 9:04 pm
Mapping off tire size/odometer won't work at all in my yard. Mud here and there, enough for it to slip. It needs actual position or perimeter. As for...
16561
Dan Barclay
Dan@...
Nov 3, 2009 9:04 pm
Absolutely correct that it's possible. The survey unit$ are a good example$ of that. Aviation units using WAAS (wide area augmentation system) come close as ...
Perform a search of "Dooly" at this list. I live in an area of VERY fine sand and my RM would get "stuck-on-stupid" (SOS) at almost every outing. Steve...
WAAS corrections are now built into every consumer unit. Still, the best accuracy is about +/-4m, not enough to navigate a mower by. Being in Houston near the...
... Reliable -- like the wire is?? This summer my RL500 crossed the perimeter and a 3' deck then continued into the deep end of my pool. Despite my almost...
16565
Dan Barclay
Dan@...
Nov 3, 2009 10:42 pm
It happens. After running RL1000's since the first green models appeared I had one go in the pool twice within a few weeks this summer. Never had a problem...
That's why I have a DMZ (DeMowerized Zone)....... a wide buffer zone along the seawall. I'd rather mow that strip with my electric push mower than risk a...
My two cents ... for what it's worth: GPS has to be so accurate that it also must incorporate Einstein's Theory of Relativity into the programmed location...
Yes, relativity is always used in the calculations. That's part of every calculation which starts with a pseudorange and ephermeris (satellite orbital path)...
The discussion has gone a slightly different direction than I thought/intended initially. However, isn't very inspiring? It keeps coming back to the fact that...
I am a pragmatic rationalist.... and empirical agnostic. I am an engineer (ret). And I'm an American. We have a machine for laying cable, it's a modified...
I feel the need to expand the previous thoughts. I was an industrial psychologist before I went back to school to earn the engineering degree. (then later,...
16572
Dan Barclay
Dan@...
Nov 4, 2009 4:18 pm
I've never had a problem installing perimeter wire. If you are trying to bury it then you're working too hard. Follow their instructions and it works just...
Just an advice on how I installed the wire; I buried it about an inch in the ground. I took an old circular saw and cut a line in the grass and dirt and just...
Use an edger. Some are better than others at this and can go really deep. I had really dry soil and the dirt tended to fall into the little trench formed. So...
Interesting. Thanks for the info. Of course it's technically feasible to triangulate off of three local transmitters (not sure what the other poster meant by...
