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-   -   How much does your robot weigh? (http://www.chiefdelphi.com/forums/showthread.php?t=125859)

c.shu 05-02-2014 12:50

How much does your robot weigh?
 
So after wieghing our own robot last night. I was thinking that we could see some really lightweight bots this year.

So:
  • How much does your bot weigh?
  • Are you planning on adding weight to reach the max 120lbs?

HumblePie 05-02-2014 12:56

Re: How much does your robot weigh?
 
We project our total (functional weight) to be around 100 lbs. I have a soda on the "under". Our final weight will definitely approach 120 lbs. Why? One word: Ballast :D

Dan.Tyler 05-02-2014 13:49

I am forseeing another sub-90lb bot coming to a regional near you.

Why? One word: maneuverability.

pilum40 05-02-2014 14:06

Re: How much does your robot weigh?
 
As of last night...50 lbs without electrical and motor controller boards.

Dr.Gusta 05-02-2014 14:12

Re: How much does your robot weigh?
 
With everything except one part which will end up weighing like 5lbs our robot is 63lbs. We are going to drive it with and without added weight and see what we like the best.

c.shu 05-02-2014 16:14

Re: How much does your robot weigh?
 
Honestly did not expect anyone to vote for the 0-30 lbs option. I wonder what that bot looks like.

pntbll1313 05-02-2014 16:38

Re: How much does your robot weigh?
 
Quote:

Originally Posted by c.shu (Post 1338098)
Honestly did not expect anyone to vote for the 0-30 lbs option. I wonder what that bot looks like.

I'm pretty positive that is a joke... A better question would have been
-Under 70lbs
-70-90
-90 to 110
-110 to 120

chrisfl 05-02-2014 16:38

Re: How much does your robot weigh?
 
Close to 120lbs
Why: sexiness and trying new drivetrain and other mechanisms(Like really sexy)

BobbyVanNess 05-02-2014 17:20

Re: How much does your robot weigh?
 
We're approaching 120lbs much more quickly than any of us would like... But after all, μ*Fn=Ff, right? :D

BBray_T1296 05-02-2014 18:43

Re: How much does your robot weigh?
 
Quote:

Originally Posted by bobby5150 (Post 1338127)
We're approaching 120lbs much more quickly than any of us would like... But after all, μ*Fn=Ff, right? :D

Correct, more weight = more friction. It is very likely that low-gear 6CIM drives are traction limited, rather than torque limited, so while you are sacrificing acceleration (and possibly top speed) you are gaining a huge pushing advantage in the low gear

DampRobot 05-02-2014 18:45

Re: How much does your robot weigh?
 
We're weighing it about 85 now and will probably ship at around 95.

AdamHeard 05-02-2014 19:24

Re: How much does your robot weigh?
 
Quote:

Originally Posted by c.shu (Post 1338098)
Honestly did not expect anyone to vote for the 0-30 lbs option. I wonder what that bot looks like.

How comp bot currently weighs less than 30 lbs.

azcalg 05-02-2014 19:30

Re: How much does your robot weigh?
 
We were at 79 pounds when we last met, with a pneumatic shooter and a herder on either side and all the electronics and stuff. We've been working on a catapult powered by surgical tubing that'll add some functionality and we've estimated it'll add ~10 pounds at most. We're probably going to try and fit on a blocking device for playing goalie in the next couple weeks so we'll basically be able to apply every possible tactic and still be underweight =)
This is pretty exciting for us because last year we realized we were overweight the weekend before ship night and lost our full court shot in the process of making it lighter.

BBray_T1296 05-02-2014 20:08

Re: How much does your robot weigh?
 
I think the new frame sizing rules (112" vs 28"x38") have really made it more trivial to achieve <=120lbs. It seems like less of a pressing issue to worry about weight, unless you are in more extreme circumstances (ie trying to do everything)

DampRobot 05-02-2014 21:09

Re: How much does your robot weigh?
 
Quote:

Originally Posted by BBray_T1296 (Post 1338221)
I think the new frame sizing rules (112" vs 28"x38") have really made it more trivial to achieve <=120lbs. It seems like less of a pressing issue to worry about weight, unless you are in more extreme circumstances (ie trying to do everything)

Last year the frame perimeter was the same, and it was a struggle for a lot of teams to make 120.


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