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-   -   Team 11 - Robot Reveal 2014 (http://www.chiefdelphi.com/forums/showthread.php?t=126778)

Jscout11 19-02-2014 16:28
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by LaScooter (Post 1346321)
Link07 - We don't have exact numbers, but the traction was much higher than normal colsons. If you are planning on getting into pushing matches, I would recommend them. ;)
We were able to push Beta around in practice a little bit at least :D

EricDrost 19-02-2014 17:00
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by Lil' Lavery (Post 1346309)
What kind of performance gains have you seen from that? Did you try any other tread patterns?
Quote:
Originally Posted by LaScooter (Post 1346321)
We are planning on trying out different patterns, but the current design should be significantly better than normal colsons. :D
Sean,

I intend to publish a quantitative analysis on wheel tread eventually. But for now we've found that comparatively: straight cut > diamond cut > uncut when it comes to simulated coefficient of friction in the forward direction.

Because the cut is perpendicular to the direction of motion, the forward component receives 100% of the vector's magnitude unlike the angled cuts in the diamond pattern.

The W set of VexPro wheels follow the same logic.

DonRotolo 19-02-2014 17:21
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by EricDrost (Post 1346371)
Because the cut is perpendicular to the direction of motion, the forward component receives 100% of the vector's magnitude unlike the angled cuts in the diamond pattern.
Eric, don't forget to consider the traction from when the tread material bends, when the cuts are sufficiently close to each other. A diamond pattern has more cuts and thus some thinner profiles. I can't say if it is significant or not, but rubber car tires use angled siping just so they can get thinner profiles compared to perpendicular siping.

EricDrost 19-02-2014 17:32
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by DonRotolo (Post 1346388)
Eric, don't forget to consider the traction from when the tread material bends, when the cuts are sufficiently close to each other. A diamond pattern has more cuts and thus some thinner profiles. I can't say if it is significant or not, but rubber car tires use angled siping just so they can get thinner profiles compared to perpendicular siping.
I absolutely agree that my explanation was an oversimplification. We intend to do MUCH more comprehensive testing. But with the data points we have so far, the straight cuts are the best performing wheels we've tried.

Ryan Dognaux 20-02-2014 11:00
Re: Team 11 - Robot Reveal 2014
 
Great looking robot guys. Will surely be a contender in MAR this season!

sportzkrazzy 20-02-2014 13:33
Re: Team 11 - Robot Reveal 2014
 
Loving the bot this year. Should be a top contender where ever it goes. Looks like the in-house powder coating payed off because she is gorgeous. :)

Robotmmm 20-02-2014 14:22
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by Jscout11 (Post 1345937)
I'd love to say it was planned that way...
Not planned? So the song is "Black Sun" and the robot is black and yellow(sun) and this is totally coincidental? :yikes: Guess it was meant to be!

Jscout11 20-02-2014 15:53
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by Robotmmm (Post 1346965)
Not planned? So the song is "Black Sun" and the robot is black and yellow(sun) and this is totally coincidental? :yikes: Guess it was meant to be!
After finding the song though I almost wanted to change the name of the robot :rolleyes:

Chris is me 20-02-2014 16:26
Re: Team 11 - Robot Reveal 2014
 
I love it. A simple design that capitalizes on 11's strengths - strategy and execution. Paint job is beautiful too. I expect success similar to 2013 with this thing.

Oh, and tell Drost that I hate the music :P

EricDrost 20-02-2014 16:53
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by Chris is me (Post 1347061)
Oh, and tell Drost that I hate the music :P
Because it reminds you of your 2011 arm? :rolleyes:

Gregor 20-02-2014 23:39
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by EricDrost (Post 1347076)
Because it reminds you of your 2011 arm? :rolleyes:

Cash4587 21-02-2014 09:08
Re: Team 11 - Robot Reveal 2014
 
How did you guys make that intake roller? It looks like some sort of rubber tube?

EricDrost 21-02-2014 10:09
Re: Team 11 - Robot Reveal 2014
 
Quote:
Originally Posted by Cash4587 (Post 1347418)
How did you guys make that intake roller? It looks like some sort of rubber tube?
Polycarbonate round tube with sorbothane epoxied on. It's incredibly grippy but requires wiping down before every match or two - it gets dust/dirt on it and becomes more slick.

Overall, we're very happy with it.


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