Alt-BEAM Archive
Message #12209
To: beam@sgiblab.sgi.com
From: BUDSCOTT@aol.com
Date: Mon, 20 Mar 2000 16:30:52 EST
Subject: [alt-beam] Re: Question about vibra-popper mechanics
To make the bot go forward, it looks like you need to either move the motors
up in front, or move the motors up front. if you just try to put the center
of wieght forward, it will go backward even more, the real problem is that
you have your motor mounted in back of the robot, try em in front, might be
difficult, but worth it!
-Spencer
12210 Mon, 20 Mar 2000 16:34:26 EST [alt-beam] Re: attaching solar cells beam@sgiblab.sgi.com BUDSCOTT@aol.com What kinda bots ya make, if you have symets or anything that remotely
resembles a solar engine, look on solarbotics, under d/ls, there you can
download a .pdf file of how to freeform a solar engine to fit under a
solarpanel. If you made a photopopper, just elaborate, above all, be creative!
-Spencer
12211 Mon, 20 Mar 2000 16:28:49 EST [alt-beam] Idea to tumble proof your bot... beam@sgiblab.sgi.com Toby503@aol.com What if you could put some sort of "roll cage" around one's robot made of
paper clips (maybe inside some heat-shrink) in case it falls of the table?
Anyway, if it doesn't work the roll cage would look cool...
Rusty
12212 Mon, 20 Mar 2000 17:01:43 -0500 [alt-beam] Re: Funky idea... beam@sgiblab.sgi.com "Sathe Dilip" Sorry to disappoint you but this won't work (very efficiently) for
multiple reasons.
I think what you heard about the resistance (if you mean NO resistance)
is the thermal resistance (high thermal conductivity) & not the friction
equivalent of resistance (viscosity) or the electrical resistance. When
you fill a motor with oil, the rotor will have increased friction with
the medium (as compared to its rotating in air).
Compared to air filled motor (whatever free space it has), an oil filled
motor will be heavier & less buoyant.
If you do not have effective seals for the oil, water will still get in
(& oil out) due to the pressure seen by the oil (difference in density).
All in all, having a air filled motor with good seals around the shaft
will be more efficient than what you are proposing.
Lastly, the oil has to have near infinite electrical resistance.
Otherwise you will short circuit the computer.
Dilip
-----------------------------------
William Cox wrote:
>
> Sorry, I mean NO resistance.......
>
> > >cooled mineral oil, because it has infinite resistance.
--
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The early bird may get the worm, but the second mouse gets the cheese.
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12213 Mon, 20 Mar 2000 17:08:53 -0500 [alt-beam] Re: Question about vibra-popper mechanics beam@sgiblab.sgi.com "Sathe Dilip"
> Richard Caudle wrote:
>
> > Using a similar concept, the bot can be built like a turtle shell with
> > springy legs that are always within the (hard) shell.
>
> Edmund Scientific has clear acrylic domes.
Acrylic is not as shatter resistant as polycarbonate. Polycarbonate is
the material used for bullet proof glass & safety glasses.
Dilip
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The early bird may get the worm, but the second mouse gets the cheese.
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12214 Mon, 20 Mar 2000 16:11:29 -0600 [alt-beam] Re: Question about vibra-popper mechanics beam@sgiblab.sgi.com bill_r@inetnebr.com (Bill Richman) I seem to recall some research done on inertial propulsion systems for
spacecraft quite a few years ago. Basically, the setup was a hollow tube
with a cylindrical weight inside. You "threw" the weight down the length of
the cylinder as rapidly as possible, and then pulled it back comparatively
slowly. This produced a net motion in one direction, although I can't quite
visualize which way. I'm not sure if you just let the weight slam into the
far end of the tube, or if you would want to bring it to a gentle stop.
Might be worth playing with, though...
Bill Richman
http://incolor.inetnebr.com/bill_r
(Home of the COSMAC Elf
microcomputer simulator!)
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