View Full Version : stairs
Has anyone thought about how to climb onto the 6 inch platform yet. We have a few ideas, but I need some help brainstorming.
BlueOrion
11-01-2004, 21:37
Just think about different wheel systems and don't forget about proper ground clearance.
~BlueOrion~
easy way get at least a 14" wheels???????????? just a thought
would front tank treads on an angle work? How would you get around bottoming out?
tkwetzel
11-01-2004, 22:19
I fyou had tank treads running the length of the bot, you should have no problem bottoming out.
I'm waiting to see the ideas that some of the more innovative teams come up with at regionals and nationals. This year's Xerox Creativity awards will all be well earned, I'm sure.
OneAngryDaisy
11-01-2004, 22:23
check out 225's robot from 3 years ago- they had a really cool wheel system.. hard to explain but basically they had 8 wheels, 2 on each side with an extra wheel attached like 0=0. they could rotate this addition so that it looked like they were tiptoeing.. that system would allow you to pick up your robot's rear as the front goes over the stair..
good luck finding a solution- i'd like to have a 1218/341 brainstorming session if possible, you guys are awesome
absolutely, let me know when you would want to and I will get my team together. We just came up with a pretty interesting idea. Trying to work it out on cad now.
Come on, I want to see some brainstorming! I say we just get these bots to fly. That would make this comp so much better.
would front tank treads on an angle work? How would you get around bottoming out?
We used this in 2001 to go over the 4x4 under the bar. It worked very well, we somehow got 4th place at VCU.
Wetzel
any pictures or cad drawings?
Mike Norton
12-01-2004, 08:51
Treads are good but out riggers with help. go and find 1999 videos. You will see how fast a robot can climb. The good robots did not even slow down going over the puck. It was done all in a nice fuild motion.
Mikey229
12-01-2004, 08:55
would front tank treads on an angle work? How would you get around bottoming out?
yes they would but about bottoming out every think about skids in front of ur back tires.
MichalSkiba
12-01-2004, 10:58
I'm not going to release details, but my hint is that following:
Think about how your body shifts when climbing stairs, and why.
Think about how your body shifts when climbing stairs, and why.
There's pictures and videos of that here:
http://www-2.cs.cmu.edu/~personalrover/Rover1/robot.html
It shows how cumbersome and ineffective it is. Although it is a solution, there are better ways.
Has anyone thought about how to climb onto the 6 inch platform yet. We have a few ideas, but I need some help brainstorming.
How about using spokes to push the robot up to the stair
M. Hicken
12-01-2004, 15:08
just thought
-rather than a caster, which will get caught on the stair, go to a semi sphere or similar delrin or teflon material, make it so it wont get cought on the angle of the stair
we're still working on a drive system for the stairs, but think about having 4wd in the rear or front, and a delrin piece in the back,make the front or back wheel in the 4wd pivot so it can "climb" the stair
this is going to be an amusing attempt, but i have no pics and cant post them even if it did
pcture this on both sides
--------------
| |
| |
| wheel |
| | make the system pivot on one wheel on both sides
--------------
| |
| wheel |
| |
| |
--------------
edit: ok it looks good in the reply page, but on the thread the spaces are all messed up
Ragin_Kage
12-01-2004, 15:22
How about using spokes to push the robot up to the stair
Spokes? you mean like something to grab the edge of the stair and pull it up...what if your, lets say, wheels where big enough and had sort of a toothed tread and it could easily grab and hold an edge and work its way up...giving you had clearence, and everything else needed...multiple wheels, 4 wheel drive...
M. Hicken
12-01-2004, 15:35
the spoke would work but look at robot specs R13, you'd have to be really careful about the technicalities of that one
If anyone remembers our 2001 bot, it had an arm with a range of motion close to 180 degrees and a rotating wrist at the end of it. Meaning that, when positioned the right way, the arm could lift the front two wheels off of the ground. I wish I had a picture of us doing this, but if you look in the CD galleries you should be able to get an idea of what I'm talking about. Although it hasn't been tested, I'm sure that it would be able to lift the front wheels enough to get up the step. Then it could rotate the arm 180 degrees to lift the back wheels up enough to get up the step. This would only be possible with a bot with 4 wheel drive though.
This is also what Team 60 did with their arm in 2001 to cross the midfield barrier.
Arefin Bari
12-01-2004, 21:15
threads and wheels are good idea.... how about think a little outside the box.. why not add a mechanism which will help you to get on the platform... ;)
Jedi Padawan
13-01-2004, 00:17
the easy way would be to just to litterally fly. but barring gas fuel or nuclear fusion I'm thinking that might be a little advanced for most teams.... otherwise I think my team figured it our you'll need almost a 16-18 inch wheel to get over the "bump" and that's provided you end up with something like 10 inch casters or you can stick to the tried and true methods of tank drive and offset wheels (one higher and the rest normal.) your real worry should be about flipping (cringes at thought of Icarus last year) :rolleyes:
Has anyone thought about how to climb onto the 6 inch platform yet. We have a few ideas, but I need some help brainstorming.
did you consider that you might not have to get up on the plaform, or that you may not want to.
I assume you are trying to go for the chin up, so consider this:
The edge of the platform is only 2 feet from the bar. so as you approach the bar, whatever you are going to use to hoist yourself up is going to have to go starit up. If it is a lifting arm or some sort, you can basically add 6" to 1' onto the arm and reach the bar without getting onto the platform
well thats my idea at least
interesting. you think that an arm or something that long could fit within the starting dimentions? If it has many pivots for folding I fear that it wont be strong enough to life a 130 pound bot
In 2001 we built a 14ft. teloscoping arm on our machine so that we could put a big ball on a goal while it was balanced on the bridge. But that was our only mechanism besides the drive system because we designed it so that it could also manipulate the goals. So I wouldn't advise devoting so much weight to such a long arm if all that you are going to do with it is hang.
In 2001 we built a 14ft. teloscoping arm on our machine so that we could put a big ball on a goal while it was balanced on the bridge. But that was our only mechanism besides the drive system because we designed it so that it could also manipulate the goals. So I wouldn't advise devoting so much weight to such a long arm if all that you are going to do with it is hang.
you could easily use that arm to get a 2x ball... and plowing the balls to the coral doesnt really take any special parts (if you dont mind doing it inefficiently)
MConte05
14-01-2004, 23:41
Yea, that is how our team seems to be leaning as far as how to get the balls, hang, and pick em up....Another thing with the arm, if the center of gravity is rather low, you could use the arm to push down on the step, causing the bot to lift, and roll yourself onto it....I think.....dunno... :rolleyes:
Well currently, my team is tweaking our design to get up onto the platform. Basically we figured you just need to have enough ground clearance and the wheels spaced rightly, and with enough momentum you should have no problem getting up. Our only problem now is our frame is getting caught up on the platform, which should be fixed by tommorow hopefully. I'd really hate to be a rookie this year :rolleyes:
vBulletin® v3.6.4, Copyright ©2000-2017, Jelsoft Enterprises Ltd.