Spinnerness...

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bitternboy
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Post by bitternboy »

After AWS, I've been thinking about any new robot I may make. Jigsaw won because a) it had a good flipper, b) it was well driven and c) it got under everything.
I think I may focus on this last quality for a potential alternative to a spinner i.e. a 2 wheel push bot done properly.

I have therefore been looking around for suitible micro air pumps to put on the undeside at the front to "suck" the front end down and stop anyone getting under it. I know scott made a version of void with such a system and don't know what he used but so far I have found these:
http://www.smartproducts.com/pumps_seri ... _pumps.php
Which are good if only they would take higher voltages (running a motor with a nominal V of 3 at 7.2v probably wouldn't be a good idea) and so would need a regulator. Does anyone know of a micropump that has a realistic weight and size but takes 6 volts? :-?
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alasdair
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Post by alasdair »

I was thinking of doing something like this on my new bot- it has a spinner on the front, and as the spindle goes through the base i would attatch an impeller to suck it to the ground.
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earthwormjim
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Post by earthwormjim »

A fan sucking the bot to the ground would be easier.
The Brabham BT46 F1 car did this in 1978. You can see the big fan on the back here...
http://en.wikipedia.org/wiki/Brabham_BT46

It was immediately banned after winning its first race!!
I think that this idea could be used realistically in an antweight?!?!
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Remote-Controlled Dave
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Post by Remote-Controlled Dave »

I think that this idea could be used realistically in an antweight?!?!
It's been done successfully already Jim. Vacuum from SWEDEN, Pete Waller's Succulant and Smartant 2 and 3 all had vacuum pumps to stick them to the floor. In fact, Smartant 3 was a walking, full body spinner with a vacuum cup on each foot! We had to fight it with a clusterbot at AWS18, that was fun.
Last edited by Remote-Controlled Dave on Mon Nov 01, 2010 2:05 pm, edited 1 time in total.
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Flippt
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Post by Flippt »

*ehum*
Vacuum from SWEDEN, thank you.
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earthwormjim
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Post by earthwormjim »

DOH! :D
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Remote-Controlled Dave
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Post by Remote-Controlled Dave »

*ehum*
Vacuum from SWEDEN, thank you.
Whoops! Haha, Joacim doesn't post for ages but as soon as I make a mistake about Sweden he's on it like a magnet :D
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Flippt
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Post by Flippt »

Well its my duty to keep everything in the right order 8)
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bitternboy
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Post by bitternboy »

Anyway, It all comes down to how much suction you need. Too much and you cant move, too little and you might as well not have bothered. I think the smallest one on the page I linked would suit, yes?
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peterwaller
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Post by peterwaller »

It is rather tricky although I have been contemplating revisiting it again.
I found that pulling down the front didn't move the only way I could get it to move was to pull down around the drive axis so the load went through the wheels and increased the grip.
Succulant
http://i109.photobucket.com/albums/n66/ ... 140213.jpg
Underneath
http://i109.photobucket.com/albums/n66/ ... 140216.jpg
Diagram of suction pad
http://i109.photobucket.com/albums/n66/ ... tion-1.jpg
An idea of how many attempts it took to get a working unit
http://i109.photobucket.com/albums/n66/ ... 140219.jpg
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