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Unread 07-02-2011, 13:59
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uh, should that be smoking?
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Re: pic: Team 1504 minibot final

cool, exactly what I was planning on building this week
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Unread 07-02-2011, 16:52
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Re: pic: Team 1504 minibot final

What kind of switch is that little red/blue one on the left end? Is that a Tetrix switch or a common household light switch?
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Unread 07-02-2011, 23:43
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Re: pic: Team 1504 minibot final

It looks like a limit switch to me.
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Unread 08-02-2011, 08:01
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Re: pic: Team 1504 minibot final

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Originally Posted by DeepWater View Post
What kind of switch is that little red/blue one on the left end? Is that a Tetrix switch or a common household light switch?
I just grabbed a bunch of switches at radio shack. Not part of the minibot.

It uses two neodymium magnets. They are still testing so I doin't know what the speeds are.
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Unread 08-02-2011, 09:58
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Re: pic: Team 1504 minibot final

How big are the magnets and where did you get them?
Bruce
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Unread 08-02-2011, 10:03
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Re: pic: Team 1504 minibot final

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Originally Posted by Bruceb View Post
How big are the magnets and where did you get them?
Bruce
Not sure if he used the ones I got from Harbor Freight. There is a section around the watch tools in Harbor Freight that has ceramic magnets and 100-250# magnets. They may have used these or purchased neodymium mags somewhere else. I have a note into the mentor for he minibot to come over here and give us an answer.
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Unread 08-02-2011, 11:16
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Re: pic: Team 1504 minibot final

www.allelectronics.com has a pretty good assortment of neodymium magnets.

Edoga
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Unread 08-02-2011, 11:20
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Smile Re: pic: Team 1504 minibot final

I found some magnets that we are going to try from McMaster-Carr.
Ultra-High-Pull Neodymium Ring Magnet 1" OD, 1/2" ID, 1/2" Thick, 21.4 Pull lbs. Part # 3360K79
My thought is to add a small bearing in the center and mount it so that it allows the minibot to travel in the vertical plane without falling away from the pole.
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Unread 08-02-2011, 19:14
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Re: pic: Team 1504 minibot final

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Originally Posted by froutson View Post
My thought is to add a small bearing in the center and mount it so that it allows the minibot to travel in the vertical plane without falling away from the pole.
What'cha gonna make your bearing out of? Something in the list in <R92> I hope.
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Unread 08-02-2011, 19:08
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Re: pic: Team 1504 minibot final

Quote:
Originally Posted by R3P0 View Post
Not sure if he used the ones I got from Harbor Freight. There is a section around the watch tools in Harbor Freight that has ceramic magnets and 100-250# magnets. They may have used these or purchased neodymium mags somewhere else. I have a note into the mentor for he minibot to come over here and give us an answer.
There is one magnet in the middle of the mini bot. It is a 52 lb pull neodymium from applied magnets. I got some smaller 27 lb pull ones too, but I threw the 52 ones into the cad mock up so they got used. One word of caution when using these magnets, BE CAREFUL! they are a pain to get apart with no spacers in and can easily draw blood(i know from experience). You shouldn't need anything stronger then a 52 lb pull magnet. We probably could of gotten away with using the 27 on our mini bot.
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