Alt-BEAM Archive
Message #09479
To: beam@sgiblab.sgi.com
From: "Travis D." beam_bot@yahoo.com
Date: Sat, 22 Jan 2000 21:55:12 -0800 (PST)
Subject: [alt-beam] Gear Motors
Does anyone remember the part # and page # for those
herbach and rademan "BGmicro" motors?
Thanks in advance,
Travis
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9480 Sat, 22 Jan 2000 21:58:23 -0800 (PST) [alt-beam] Re: Monocore circuit beam@sgiblab.sgi.com Darrell Johnson
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content-disposition: inline
here's the Monocore circuit that Wilf came up with and
posted to the list last spring sometime, for a
worm/snake circuit, just keep adding slaves. Vary the
resistors on both the master and the slaves to get the
desired timing.. takes a bit of tweaking to get the
most efficient wave.
I think a master slave bicore chain could work well
for making a slithering bot similar to the ones at:
http://www.snakerobots.com/
you could have a completely autonomous snake-bot,
phototropic, or obstacle avoiding, or both.
Hope this helps,
darrell
--- Jim Taylor wrote:
>
> I was thinking of making a tutorial of the servo
> snake bot. Basically I
> ripped off Darrel Johnson's BG micro motor snake
> fist. Looking at the truck
> load of servos sitting on my workbench (20 or so) I
> decided to make a servo
> version, so others could more easily rip me off :)
> Darrel's snake page said he used a monocore,
> however I couldn't seem to
> find any info on the list archives about wilf's
> Moncore. Currently I'm
> moving my BG micro snake bot around with a simple
> bicore, with two motors
> attached to each output. Then coupling segments
> together. Working very
> well, and is very adaptable. It will start to make
> forward progress no
> matter what position it's placed in. I did improve
> on the mechanics of
> Darrel's snake just a bit. I added a light seeking
> head to the front
> segment. It essentially picks up and moves the bot.
> Providing effective,
> (however ugly) one motor turning.
> I'm not sure if, or how I'm going to turn the
> servo snake. It's of
> course a bit wider, and I don't believe the approach
> I used on my other
> snake will work effectively. So I'm either going to
> make a 5 segment snake,
> with 2 DOF for each segment, or make a 10 segment
> snake with only 1 DOF, and
> find some other way to turn the beast.
> The biggest surprise to me, is that so far, it's
> my most adaptable BEAM
> bot. Able to navigate to a light source
> effectively, and also climb over
> objects almost 7 it's height. Objects that it
> doesn't climb over, it simply
> moves around. I really was tired of BEAM bots that
> could only navigate on
> smooth terrain, even my big footed 5 motor walker,
> cannot navigate terrain
> the snake can. I also note the failings of those
> pager motor photovores,
> sure they are small, but how can they possibly be
> used in our world? Almost
> all wheeled robots, and walkers with less then like
> 4 DOF per leg, will have
> trouble navigating anything in our 3 dimensional
> world.
>
> Well I'm done raving for one night :)
>
>
>
> James Taylor
> URL: http://fly.to/springmeadows
>
> ----- Original Message -----
> From: Richard Caudle
> To:
> Sent: Saturday, January 22, 2000 4:31 PM
> Subject: Re: Monocore circuit
>
>
> > Hey Jim!
> >
> > Share your schematic/pix with us! We all are
> interested in innovations
> and
> > novel approaches to robots.
> >
> > You may also want to check out Justin Johnson's
> HEMICORE circuit.
> >
> > www.adaptobotics.com
> >
> > Richard Caudle
> > www.geocities.com/frankendaddy
> > Home ICQ - Frankendaddy
> >
> > Guardians of the sacred words: Nee, Ptang, and
> NeeWhon!
> >
> >
> >
> >
>
>
=====
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Attachment: monocore.gif
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9481 Sat, 22 Jan 2000 23:41:19 -0700 [alt-beam] Thank you very much! (was: Monocore circuit) beam@sgiblab.sgi.com Jean auBois
At 09:58 PM 1/22/00 -0800, Darrell Johnson wrote:
>here's the Monocore circuit that Wilf came up with and
>posted to the list last spring sometime, for a
>worm/snake circuit, just keep adding slaves. Vary the
>resistors on both the master and the slaves to get the
>desired timing.. takes a bit of tweaking to get the
>most efficient wave.
Thanks for posting the schematic. I've added it to the Rigter Archive on
the Heretics site. Although the design is rather different than the one
that Tilden used in his lamprey (which is of the unicore/bicore variety),
the report from the '98 Telluride Neuromorphic Workshop (see
http://zig.ini.unizh.ch/telluride98/report98/node48.html)
may be helpful
with regard to the coupling resistors.
jab
http://www.serve.com/heretics
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