Alt-BEAM Archive
Message #10244
To: beam@sgiblab.sgi.com
From: Dave Hrynkiw dave@solarbotics.com
Date: Tue, 15 Feb 2000 10:46:18 -0700
Subject: [alt-beam] Re: ....still more questions, thanks.....
At 02:04 PM 2/14/00 , Scolman,Jim wrote:
>the two motor ones, why do they run on just the tubing covered
>motor shafts?.......why not wheels of some sort?.......is it because of the
>mechinical leverage envolved, a large wheel has a long lever arm, etc.
You got it exactly. Pager motors are very low on torque (their ability to
turn stuff), but high on the rotational speed. So to get any useful work
out of them, we use the tubing to make the motor shaft act as a tiny
diameter wheel, which it has less problem spinning (at high speeds).
Regards,
Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com
10245 Tue, 15 Feb 2000 14:04:24 EST [alt-beam] The jump-noid beam@sgiblab.sgi.com BUDSCOTT@aol.com The official name for my new project, the jump-noid. (hehe) anyways, i finnally gotten all the final planning down for the specs on this bot. I'm going to use a heavy gauge wire to make two legs, that space about 3 in. apart and 1 in. out. I'm gonna mount the solenoids on the ends of these. This way the bot will drag its butt (cap) forward by pulling itself with the legs. i'll glue the center of the harness (legs) on top of the 100k potetiometer, that will hold its head up. This should work out cool because now i can mount the solenoids at a 45 degree angle and not have to worry about tipping (wider is better) because of the 3in wide harness. The solenoid itself, unfortunately, should be a pull, thats okay. I can mount the solenoid in backwards, and make a special armature attachment that will extend from the armature to the back of the solenoid, this will simulate a push solenoid. Hopefully i should have the parts by the end of this week, possibly, and finish the bot by the w!
eek after. total coolness. Keep on BEAMin!
-Spencer
10246 Tue, 15 Feb 2000 12:57:32 -0600 [alt-beam] Re: solar cells alt-beam@egroups.com Ben A Micklin Wow! 100 Qty? What do you need that many for? Robo-t-rex?
Try Solar-botics. Are you looking for a 3.5 6 mA kind?
Or a 2.7 16 ma one?
~ben~
On Mon, 14 Feb 2000 22:35:11 -0800 songki26@hotmail.com writes:
> I am looking for solar cell of Sunceram(panasonic). Please let me
> inform about solarcell. I want to buy at least 100qty .
>
>
>
------------------------------------------------------------------------
> Save cash today!
> http://click.egroups.com/1/1414/5/_/5594/_/950596524/
>
> -- Talk to your group with your own voice!
> -- http://www.egroups.com/VoiceChatPage?listName=alt-beam&m=1
>
>
________________________________________________________________
YOU'RE PAYING TOO MUCH FOR THE INTERNET!
Juno now offers FREE Internet Access!
Try it today - there's no risk! For your FREE software, visit:
http://dl.www.juno.com/get/tagj.
10247 Tue, 15 Feb 2000 12:15:31 -0600 [alt-beam] Re: Electronics Xpress alt-beam@egroups.com Ben A Micklin Hey,
THat sounds easy. What brand of motor? Namiki?
It include pcb and solar panel?
THanks for the help! Looks like I might get into BEAM after all.
~ben~
On Mon, 14 Feb 2000 22:39:44 -0700 Senior writes:
> Hello everyone!
> A major thing with newbies is not being able to get all the parts
> from
> one place (Besides solarbotics, which is "overpriced"). Well, fear
> no
> more! Electronics Express has a solar cell/motor kit you can use,
> plus
> flashing leds and pcb fabrication kits and all the other parts. But
> two
> of the motors for a photovore.
>
> Solar roller: $15
> Photover: $17
>
> Have fun!
>
> Kyle
>
>
------------------------------------------------------------------------
> Save cash today!
> http://click.egroups.com/1/1414/5/_/5594/_/950596964/
>
> -- Create a poll/survey for your group!
> -- http://www.egroups.com/vote?listname=alt-beam&m=1
>
>
________________________________________________________________
YOU'RE PAYING TOO MUCH FOR THE INTERNET!
Juno now offers FREE Internet Access!
Try it today - there's no risk! For your FREE software, visit:
http://dl.www.juno.com/get/tagj.
10248 Tue, 15 Feb 2000 11:19:47 -0800 [alt-beam] Re: ....still more questions, thanks..... beam@sgiblab.sgi.com Bruce Robinson
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content-transfer-encoding: 7bit
"Scolman,Jim" wrote:
>
> ... the solarpopper style robots....the two motor ones,
> why do they run on just the tubing covered motor shafts? ...
> ... is it because of the mechinical leverage envolved, a
> large wheel has a long lever arm, etc.
Exactly.
You can, however, use an idler wheel between the motor shaft and the
ground. This does not change the overall mechanical ratio, but it does
provide you with a wheel that can roll over cracks and uneven surfaces.
See attached.
Typically, the motors are mounted on the robot frame with the shafts
parallel to the ground. The wheels are mounted on small pivot arms, so
the motor shafts are pressing down on top of them. This is quite
different from mounting the wheels ON the motor shafts.
Steve Bolt has used this arrangement on a number of his robots. Look at
http://www.xs4all.nl/~sbolt/Other/suneater.html
Regards,
Bruce
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Attachment: Idler.gif
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10249 Tue, 15 Feb 2000 20:46:01 +0100 [alt-beam] Re: Beams and robotics net "Olivier lory" Maybe on tomorrow on the link http://www.botic.com
Wait and see
Cheers
Olivier
----- Message d'origine -----
De : William Cox
À :
Envoy‚ : lundi 14 f‚vrier 2000 18:10
Objet : Re: Beams and robotics net
> What would the URL be?
> http://www.asdlfsakdfjlasdf.com/asfdsdf/sadfsdf/sadfsdf/yourname?
> -William
>
> ----- Original Message -----
> From: Robocom Technologies
> To:
> Sent: Saturday, February 12, 2000 3:04 PM
> Subject: Beams and robotics net
>
>
> Hi there,
>
> This message will be, probably, interesting for the robotic fans around
the
> world and I hope this will help you, the only thing I need is your
feedback.
> So what I want to do, is to give you the tools to express yourself, to
give
> ideas to the others ...with everything you need on the net:
>
> a dedicated server for the robotic world...
>
> So for the ones who are interested in that project, they will receive an
> unlimited space on this server, Emails, Ftp account, chat, forums... for
> nothing !
>
> I don't know if it's a good idea or not but I need your feedback on this
and
> I hope you will help me to create, design this project for the fans as
you.
>
> Best regards,
>
> Olivier
>
>
>
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