Three narrow robots, looks good to me!
-D
Two narrow front robots, and a wide front robot situated long ways…just shows that three narrow robots CAN in fact fit balanced on a bridge =P
Oh shnap! Gus got balance! Now let’s see you do that with all three robots being controlled, not just placed on a bridge! 
What are the dimensions on those robots on that bridge? Are there any supports/weights added to those robots? Did you drive these robots onto the bridge or did you place them?
Very impressed to see this!
Awesome.
All it takes is for two of the three robots to have identical CGs. And none of them get to move.
I’d still say wide is the way to go.
Nice! Do you have any clue about how much room for error you have when balancing the three robots?
Could all three robots drive onto the bridge? Even if you just pushed them on I’d be curious.
Thats what I was wondering as well. So you have the first two robots on, how then does the third robot then push down the ramp to get on? Or else the second robot will have to be pushed into place which will be hard with most 6+ wheel robots.
Does your ramp actually act like the one in the field tour video?
The bridge 2363 built is not acting like the one in the video. We tried the battery test and it is nowhere close to what the video shows. Is anybody else having this same scenario?
With coordination, it’s certainly possible. First robot drives onto the ramp, but doesn’t go past halfway - the ramp is still down. Second robot drives up and bumps into the first. Together, they slowly start inching up. The first robot can go past halfway, so long as the second robot is far enough back to hold the bridge down. The third robot comes in and starts pushing against them, and all three start slowly inching their way up.
The only thing that worries me is what happens when they get to the balance point - suddenly the bridge will swing down to level. Will that motion be enough to throw the first robot off balance and tip it over? Even if it doesn’t fall all the way off, as soon as part of it is being supported by the ground, the bridge is going to go back up to where it started, further tipping that unfortunate first robot.
We are having the same issues. It would seel like the low cost bridges are lighter than the actual bridges. We made shelves on the underside of the bridge and are working to add weight until is acts like the competition bridge. I hope this is accureate.
We did some testing last night to see if that would fix our issue but it seems like we need to add ~50lbs to each side IIRC.
We think there are missing springs or something in the drawings that are supposed to be there.
Who said they were placed? ;]
37 inches long for all of them. There are no supports or weights. And that’s for you to decide. ;] We’ll have some fun stuff up tonight. Thank you!
Who said that the two end robots have the same CG’s? I’m fairly positive they both aren’t exactly the same anymore, especially with lack of minibot ramp, paint, and electronics board configuration, they are fairly different now. I do agree with the none of them get to move though, regardless of weights and CG.
Fairly close to none.
Yes all three robots could drive onto the bridge with a little frame scrape, but did we drive them all together? You’ll just have to wait and see.
As close as we could get it. A little tip for anyone building the bridge is you’re going to need to add weights to each end. And quite a bit of it too.
-D
The real field bridge is going to be considerably heavier than the wooden one I would guess. I don’t know if its 100lbs, but that certainly can account for why the bridges do not act the same.
We used bungie cords underneath each side and tuned until the bridge matched the video.
-Brando
It might be a slight angle on the photo but measuring with a piece of paper and a pen on the computer screen, it doesn’t look like the same amount of bridge is on either side of the fuclrum-pivot-whatever.
Our bridge turned out to be a bit more sensitive then the one in the video, but we still managed to write some autonomous code to auto balance as well as use our Kinect to drive the robot onto the bridge and balance.
Impressed.
dang robbie that awesome keep up the work i have seen our team grow over 4 seasons let go win a regional nice kinect looks so fun almost stayed up