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  #16   Spotlight this post!  
Unread 28-01-2011, 15:56
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Re: pic: 816 as of 1/25/11

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Originally Posted by ajlapp View Post
That's a clean looking bot.

What does the underside look like? How do you put the wheels in?

Also, I don't see any chain tensioning features....care to expand.
We have a similar drive and have never had to tighten our chain, ever from the time we put the robot together until the end of the season. We do 4-5 events per season as of late, plus demos.
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  #17   Spotlight this post!  
Unread 28-01-2011, 23:52
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Re: pic: 816 as of 1/25/11

Looks great Dustin. I am liking the tower and the robust chassis. I also like how you and your team evenly distributed your weight to compensate for your arm base (putting the compressor and the battery on one side, with your arm in the back). Looking forward to seeing the final robot at NJ.

Curiosity, are all 6 of your wheels in contact with the floor, or is it a rocker?
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  #18   Spotlight this post!  
Unread 02-02-2011, 08:53
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Re: pic: 816 as of 1/25/11

Quote:
Originally Posted by delsaner View Post
Looks great Dustin. I am liking the tower and the robust chassis. I also like how you and your team evenly distributed your weight to compensate for your arm base (putting the compressor and the battery on one side, with your arm in the back). Looking forward to seeing the final robot at NJ.

Curiosity, are all 6 of your wheels in contact with the floor, or is it a rocker?
Thanks Eric. The weight distribution might still need a little work, but it's not all that bad. With more of the Pneumatic system in place and the pound and a half of Brass fittings we had to add onto the compressor and tanks the weight has shifted a bit farther forward than expected. Once the claw, arms, arm motors, and Mini-Bot system are in place it should come in somewhere around 50/50, though I'm hoping for a split closer to 45/55 or even more rear biased if possible.

Technically, the drive is a rocker, though the rock isn't much. The Center wheel is offset approximately 1/8" lower than the outer two wheels, so it has a little bit of rock but it's barely noticeable on carpet. I'm really not a fan of some of the higher offset rockers we've used in the past, they almost seemed to rock too much, but I think we've nailed this one.

Nick and I had a chance to beat on the chassis last Saturday and were thoroughly impressed with it's speed, agility and stability. Hopefully some time this week he and I will have a chance to put it through some quantitative testing to get a real feel for how it'll hold up in competition.
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