07-02-2011 12:51

Navid Shafa

Re: pic: Team 1504 minibot final

How does this latch onto the tower? It appears as if the wheel shafts/positions are fixed...

07-02-2011 12:53

nikeairmancurry

Re: pic: Team 1504 minibot final

Also confused... Little explantion?

07-02-2011 12:58

TD78

Re: pic: Team 1504 minibot final

My guess is magnets.

07-02-2011 13:03

Domtech

Re: pic: Team 1504 minibot final

Ah. It appears to be magnet based. It kind of resembles one of our prototypes.

07-02-2011 13:52

viperred396

Re: pic: Team 1504 minibot final

I like it alot.. whats that speed on it to the top?

07-02-2011 13:59

BJT

Re: pic: Team 1504 minibot final

cool, exactly what I was planning on building this week

07-02-2011 16:52

ChuckDickerson

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?

07-02-2011 23:43

PAR_WIG1350

Re: pic: Team 1504 minibot final

It looks like a limit switch to me.

08-02-2011 08:01

R3P0

Re: pic: Team 1504 minibot final

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.

08-02-2011 09:58

Bruceb

Re: pic: Team 1504 minibot final

How big are the magnets and where did you get them?
Bruce

08-02-2011 10:03

R3P0

Re: pic: Team 1504 minibot final

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.

08-02-2011 11:16

eedoga

Re: pic: Team 1504 minibot final

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

Edoga

08-02-2011 11:20

froutson

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.

08-02-2011 19:08

ROBOTS!

Re: pic: Team 1504 minibot final

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.

08-02-2011 19:14

GaryVoshol

Re: pic: Team 1504 minibot final

What'cha gonna make your bearing out of? Something in the list in <R92> I hope.