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#1
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pic: Omni Robot
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#2
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Re: pic: Omni Robot
This is a really cool design nice work. It looks like the frame is made of Lexan or is that just a product of the rendering?
Also whats the green thing in the middle? Last edited by Andrew Bates : 18-05-2008 at 21:13. |
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#3
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Re: pic: Omni Robot
It is a cool design. It would be pretty darn expensive though. Victors are 150 dollars atleast and the omni's are not cheap. It would be pretty nifty to see this thing in action
-Vivek |
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#4
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Re: pic: Omni Robot
looks like the green thing in the middle might be a battery cell pack.
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#5
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Re: pic: Omni Robot
It is made out of 3/16 lexan, the green thing is a 10 D-cell 12v 10AH battery pack.. ill give more details later i gotta go finish my term paper lol
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#6
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Re: pic: Omni Robot
If this robot does not have to be FIRST legal, then why not use HB-25's instead of victors. They work just as well, but are only 50 dollars.
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#7
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Re: pic: Omni Robot
HB-25 Link provided for aforementioned speed controller. (We have enough Vic's)
Nice design. It looks like it'd be fun to drive. I think we have plenty of Victors in the shop. Last edited by Akash Rastogi : 19-05-2008 at 01:20. Reason: linkage |
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#8
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Re: pic: Omni Robot
Depending on the motors used, using HB-25 speed controllers could be an expensive mistake, since HB-25s have about 37% less continuous current capacity than Victor 884s.
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#9
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Re: pic: Omni Robot
Lexan can also allow for a good amount of "flex" in the frame, which can be good with this style of drive, along with mecanum also.
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#10
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Re: pic: Omni Robot
Yes, victors are expensive, but when can get them for free because you have so many around the shop, they're the best way to go. That's why he has the blue 60 mm fans on there. The ones he found don't have fans. I'll leave the rest of the explaining up to Max. Haha.
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#11
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Re: pic: Omni Robot
Yeah, make sure to use a healthy supply of cross-bracing in between each layer to minimize that flex. A Lexan chassis is very feasible, you just have to make a good, sturdy design and then follow through in manufacturing. Goodluck!
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#12
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Re: pic: Omni Robot
Quote:
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#13
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Re: pic: Omni Robot
Quote:
Since it is an omni-directional drive system, it should be relatively easy to get out of a situation where you are stalling motors. That said, lukevanoort has a good point, when using the HB-25s using some 30A breakers is a very good idea to protect your investment. Remember the breakers for the Victors, too, I'd say. By the way, how fast is this thing supposed to go? |
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#14
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Re: pic: Omni Robot
If you cant get waterjetting done easily, something like this could be done relatively well with a bandsaw and jigsaw and a wonder file. It would just take longer and not quite as smooth, but it would work.
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#15
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Re: pic: Omni Robot
Quote:
Also, make sure you have a way to stop the wheels from spinning. I was the driver this year and we had an omni bot like your design. Trust me, it is really hard to drive, especially if you have no way of stopping the wheels. Joey |
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