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-   -   Let's Talk About The Bridge: (http://www.chiefdelphi.com/forums/showthread.php?t=99415)

davidthefat 07-01-2012 20:42

Let's Talk About The Bridge:
 
Does anyone think an active balancing mechanism, like a moving heavy object, on the robot to balance 3 robots? My guess is, like most years, the majority of the robots will be around 120 lb and it would be relatively easy to balance one or two on the bridge. I had the idea of putting the battery and electronics on a platform that can be shifted from the front and back of the robot and anywhere in between to actively balance the robot. Having the weight shift back and forth instead of the actually moving the robot will be better when trying to squeeze 3 robots on the platform.

Any one have any objections to that? Relatively, it would only add a weight of a motor and the mounting. All the other weight will come from other necessary components such as the battery and other electrical components, perhaps even the shooting mechanism itself.

BrendanB 07-01-2012 20:44

Re: Let's Talk About The Bridge:
 
It'll be a whole lot easier to just move the base at a slow speed then to actively shift the weight in your robot.

davidthefat 07-01-2012 20:46

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by BrendanB (Post 1098574)
It'll be a whole lot easier to just move the base at a slow speed then to actively shift the weight in your robot.

Elaborate, what do you mean by move the base?

gyroscopeRaptor 07-01-2012 20:46

Re: Let's Talk About The Bridge:
 
It would be very likely in your idea that the cord could get caught or yanked from the connectors. The battery alone could work well if nothing would tangle on its cord, but a dead weight (if the robot has weight allowance enough for it) would serve the purpose just as well. No math to back this up, but anything lighter than the battery may not be worth spending the weight or motors on.

Daniel_LaFleur 07-01-2012 20:47

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by BrendanB (Post 1098574)
It'll be a whole lot easier to just move the base at a slow speed then to actively shift the weight in your robot.

... and an understanding of who will move and (more importantly) who doesn't move to get the proper balance

Ninja_Bait 07-01-2012 20:48

Re: Let's Talk About The Bridge:
 
I was thinking of a lead screw with a "nut" that was just a huge chunk of steel with a threaded hole. But I also agree with BrendanB, that just careful driver control can be sufficient.

BrendanB 07-01-2012 20:48

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by davidthefat (Post 1098578)
Elaborate, what do you mean by move the base?

Instead of having a mechanism move, just have your driver move at an extremely slow speed.

Kevin Sevcik 07-01-2012 20:49

Re: Let's Talk About The Bridge:
 
I'll second Brendan. Why not just move the whole robot instead? You presumably already have that system on your robot and working. Why make even more work for yourself when you already have a shooter, pickup, and bridge slapper to design and build?

davidthefat 07-01-2012 20:49

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by gyroscopeRaptor (Post 1098580)
It would be very likely in your idea that the cord could get caught or yanked from the connectors. The battery alone could work well if nothing would tangle on its cord, but a dead weight (if the robot has weight allowance enough for it) would serve the purpose just as well. No math to back this up, but anything lighter than the battery may not be worth spending the weight or motors on.

I've thought about the battery connector, since the electronics are on the platform with the battery, that would be fine. But the cords for all the other components to pose a threat, but isn't that black plastic, snake like thing, for exactly this application?

davidthefat 07-01-2012 20:51

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by BrendanB (Post 1098584)
Instead of having a mechanism move, just have your driver move at an extremely slow speed.

Thought about actively balance the bot that way, it is a viable option for 1 robot on a platform, but with 3, it gets really tricky because there simply is no room to move.

BrendanB 07-01-2012 20:53

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by davidthefat (Post 1098594)
Thought about actively balance the bot that way, it is a viable option for 1 robot on a platform, but with 3, it gets really tricky because there simply is no room to move.

The only way you are fitting three is with 3 robots that are at least 28 inches wide and you'll have 11 inches of overhang at best.

Daniel_LaFleur 07-01-2012 20:55

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by BrendanB (Post 1098598)
The only way you are fitting three is with 3 robots that are at least 28 inches wide and you'll have 11 inches of overhang at best.

Believe me, a 38"wide robot can be valuble in the elimination rounds ;)

BrendanB 07-01-2012 20:57

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by Daniel_LaFleur (Post 1098605)
Believe me, a 38"wide robot can be valuble in the elimination rounds ;)

That's what we were thinking too but everyone on your alliance needs to think that way in order to get that bonus!

In the eliminations how does the coopertition bridge play out? I can't find that anywhere.

akoscielski3 07-01-2012 20:57

Re: Let's Talk About The Bridge:
 
I am wondering how robots are going to make the bridge go down form the neutral position. That may be hard. Is it just gonna be you run into it and it will move? or will we have to make a mechanism to lower it for us? Any thoughts?

davidthefat 07-01-2012 20:58

Re: Let's Talk About The Bridge:
 
Quote:

Originally Posted by akoscielski3 (Post 1098608)
I am wondering how robots are going to make the bridge go down form the neutral position. That may be hard. Is it just gonna be you run into it and it will move? or will we have to make a mechanism to lower it for us? Any thoughts?

Like I said before, little t-rex arms.


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