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Unread 01-11-2012, 08:19 PM
Xenozero Xenozero is offline
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Mecanum on the bridge?!

Well, as the title implies, I found a youtube video online of FIRST robotics team 2084 RobotsByTheC apparently driving onto the bridge with full mecanum drive, is it legit? you decide.

http://www.youtube.com/watch?v=tHQuO...eature=related
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Unread 01-11-2012, 08:32 PM
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Re: Mecanum on the bridge?!

Well done and congrat on the FIRST team to post video
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Unread 01-11-2012, 08:51 PM
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Re: Mecanum on the bridge?!

A robot that could do this would be a welcome to any alliance, assuming the shooter/scoring function works.
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Unread 01-11-2012, 08:57 PM
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Re: Mecanum on the bridge?!

Good. Now how does it fair against the steel bump?
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Unread 01-11-2012, 09:08 PM
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Re: Mecanum on the bridge?!

How are they planing to tilt the bridge? or are they planning to have an alliance member tip it down for them?
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Unread 01-11-2012, 09:16 PM
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Re: Mecanum on the bridge?!

I believe this is a test with there 2011 bot to see if mecanum would work for the bridge. Nothing more.
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Unread 01-11-2012, 09:19 PM
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Re: Mecanum on the bridge?!

This is withing no doubt a 2011 robot they are using for proof of concept. I'd like to see a video of them against barrier next.
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Unread 01-11-2012, 09:21 PM
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Re: Mecanum on the bridge?!

Quote:
Originally Posted by the man View Post
Good. Now how does it fair against the steel bump?
Mecannum wheels are going to get absolutely wrecked on that bump this year.
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Unread 01-11-2012, 09:22 PM
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Re: Mecanum on the bridge?!

Quote:
Originally Posted by biancs15 View Post
lol. Mecannum wheels are going to get absolutely wrecked on that bump this year.
I don't think so. I feel like if you go slow over the bump it wont hurt the wheels. The 2010 bump didn't hurt ours at all. But that's why it would be nice to test.
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Unread 01-11-2012, 09:54 PM
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Re: Mecanum on the bridge?!

Quote:
Originally Posted by mr.roboto2826 View Post
I believe this is a test with there 2011 bot to see if mecanum would work for the bridge. Nothing more.
Exactly. We should have a video of automatic balancing out in a few days.
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Unread 01-11-2012, 10:13 PM
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Re: Mecanum on the bridge?!

Good find Xenozero!

I'm team captain of RobotsByTheC, and I filmed that video. That is in fact our robot from last year. I was kind of surprised the robot was able to do it. Its incredibly top heavy with its center of mass far in the front. The material on the bridge actually has about half the friction of lexan, the material used on the actual bridge. We used fiberboad, because lexan is expensive. I'de be happy to take any other questions.
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Unread 01-11-2012, 10:19 PM
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Re: Mecanum on the bridge?!

While I can't say anything about the legitimacy of the video, I can say that what you saw is possible as we tested for that on Monday and got results saying that it can be done.
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Unread 01-11-2012, 10:51 PM
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Re: Mecanum on the bridge?!

Check out the 1:00 minute mark on this video for confirmation that mecanums can climb.

http://www.youtube.com/watch?v=gyn9e...eature=related

With Jaguars and the cRio, building a feeback system to ensure that it climbs straight should be much easier than driving with the open loop controls we had on the robot when we climbed this ramp.

Jason
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Unread 01-11-2012, 10:54 PM
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Re: Mecanum on the bridge?!

Our team tested our mecanum wheels from last year on the bridge and it was able to go over it perfectly. As for the bump, I think that would be only be possible with shocks.
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Unread 01-11-2012, 11:00 PM
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Re: Mecanum on the bridge?!

I would like to say congrats! But the isn't the playing surface different?
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