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Unread 13-01-2012, 23:01
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FRC #0832
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Re: pic: We've got balance, how bout' you?

Quote:
Originally Posted by notmattlythgoe View Post
The bridge 2363 built is not acting like the one in the video. We tried the battery test and it is nowhere close to what the video shows. Is anybody else having this same scenario?
We saw a bridge constructed by another team, and it was WAY more sensitive as determined by the battery test.
Quote:
Originally Posted by Peter Matteson View Post
We did some testing last night to see if that would fix our issue but it seems like we need to add ~50lbs to each side IIRC.

We think there are missing springs or something in the drawings that are supposed to be there.
Quote:
Originally Posted by Brandon Holley View Post
The real field bridge is going to be considerably heavier than the wooden one I would guess. I don't know if its 100lbs, but that certainly can account for why the bridges do not act the same.

We used bungie cords underneath each side and tuned until the bridge matched the video.
Adding weight to both sides will not help. The addition of springs, or bungee cords, or similar, and fine tuning it with the battery test should make it react like a competition bridge.

A more sensitive bridge is better for practicing balancing - it is more difficult, so if you can do it with a sensitive bridge, you will find it easy with a competition bridge.

But, if your mechanism to pull it down relies on the bridge to be very easy to pull down, in competition you may find that it doesn't work well.
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