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Unread 11-01-2006, 17:57
Otrobotics Otrobotics is offline
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Question concerning vision target

My team recently attempted to start building parts of the field. Unfortunately, we couldn't find the box for the vision target, as well as the majority of the miscellaneous parts. I was just wondering if other groups in this competition received the the frame, since our group only received the lights, transformers and lexan cover plate. Were they included in the kit or were groups expected to custom build or buy them? If so, where can they be bought?
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Unread 11-01-2006, 18:01
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Re: Question concerning vision target

If it wasn't on the list of kit parts, it shouldn't have been included. It wasn't on the list, was it? I believe there are plans out there (I would guess FIRST website). And, the target itself (sans box) was the only part of the field provided by FIRST; you have to build your own practice field (unless another team allows you to share theirs).
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Unread 11-01-2006, 18:01
devicenull devicenull is offline
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Re: Question concerning vision target

Thats all you get for the box, you have to build the rest yourself (It's not that hard, shouldnt take too long)
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Unread 11-01-2006, 19:55
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Re: Question concerning vision target

Aside from some double-sided tape, velcro and some wooden spacers, you only need the aluminum housing, which is Hammond part # 144-26. You can buy it here:

http://www.mouser.com/index.cfm?&han...d&N=0&crc=true
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Unread 11-01-2006, 20:36
coastertux coastertux is offline
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Re: Question concerning vision target

There is a scematic in the documentation on the FIRST website. Direct link below:
http://www2.usfirst.org/2006comp/Dra...ION_TARGET.pdf
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Unread 11-01-2006, 20:58
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Re: Question concerning vision target

Why bother buying it and waiting for it to arrive when you can make it in an hour or two out of aluminum or wood?

Asides from that fact that buying it means you won't have the jankiest looking vision target ever...
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Unread 12-01-2006, 07:35
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Re: Question concerning vision target

You can certainly make it out of wood, but you should line the back with brushed aluminum if you want to replicate the reflectance of the aluminum chassis that is used on the competition version.

A wooden box will not reflect as much light off the back, and the target will appear to be less bright than the target your robot will see at the competition.
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Unread 14-01-2006, 14:17
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Re: Question concerning vision target

How about covering the inside of a wooden box w/aluminum foil?
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Unread 14-01-2006, 15:00
David55 David55 is offline
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Re: Question concerning vision target

Building the box is not a big deal.
The entire construction of the vision target took us about two hours.
We used blocks of foamed PVC to build the box, and the rest (cathodes, transformers and cover) came in the kit.



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Unread 14-01-2006, 17:57
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Re: Question concerning vision target

Quote:
Originally Posted by David55
Building the box is not a big deal.
The entire construction of the vision target took us about two hours.
We used blocks of foamed PVC to build the box, and the rest (cathodes, transformers and cover) came in the kit.



I think you need to be careful of heat on that.. metal would distribute it pretty nicely, but thats going to hold it all in..
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Unread 14-01-2006, 22:37
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Re: Question concerning vision target

Quote:
Originally Posted by devicenull
I think you need to be careful of heat on that.. metal would distribute it pretty nicely, but thats going to hold it all in..
ours is metal but we also put a small muffin fan in it to keep it cool
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Unread 15-01-2006, 12:28
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Re: Question concerning vision target

Quote:
Originally Posted by AV_guy007
ours is metal but we also put a small muffin fan in it to keep it cool
We made ours out of wood that is close to white on the inside. It is still very bright. Just for efficient cooling I plan on putting both an intake and exaust fan in it. I have yet to do that.
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Unread 14-01-2006, 18:30
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Re: Question concerning vision target

Quote:
Originally Posted by skillinp
How about covering the inside of a wooden box w/aluminum foil?
don't worry about the reflection inside the box. our wooden box was bright enough to see at any distance. and up close was so bright that it saturated the camera. of course, the plywood base was very light colored.

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Unread 14-01-2006, 19:01
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Re: Question concerning vision target

Has anyone else found that the camera seems to like lighting tubes as well as the green light? Our camera while being tested today sometimes locked on to our lighting in our facility.
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Unread 14-01-2006, 19:19
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Re: Question concerning vision target

yeah, our cam also like to follow the flouresent tube lights in the ceiling. We finally decided to call it a day and trouble shoot it tommorow.
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