Alt-BEAM Archive

Message #02305



To: beam beam@corp.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Tue, 13 Apr 1999 23:09:33 -0500
Subject: [alt-beam] Re: Spyder VII


I would, but most of my disks were corupted, and when I got home from my
friend's place (his Mac has a TV Tuner/Capture card), 1/4 of my pictures
were gone! Nooooooo! Also, my page host's FTP went down, so I have been
unable to access my site. I think they fixed it. At best, I can try to
get some pics of my home made, super comfortable, Pontiac Sunbird Car
seats on wheels, my new G3, and megavore (the only bot with pics that
survived the corupted disks).

I'm working on templates for my page. They should make updates easier.
Also, my video card has been delayed 3 times. March 15th, April 2nd, and
now May 1st!!! AHHHHHHHH!!! When i have that, I can do FAR more. I'll be
adding to the TI section, the robotics section,a nd fianly incorporating
the model building section, though there is VERY little content.

Dennison wrote:
>
> you built a body? I didn't catch that part. Post pictures man!
>
> dennison
>
> >I know that. I mentioned it was a _possible_ layout. I will most likely
> >stick with the current design. I was just coming up with otehr ideas.
> >The original idea was to use a head to "rotate" the signals to diferent
> >motors. It'd be able to walk in a "stair step" pattern to seek light.
> >Considering how NICE the body has turned out to be, I'm going to simply
> >install the motor drivers, battery, charger, and a header too. The
> >header will allow me to switch "brains". I'm going to try the step
> >motion 7 Nv brain and the standard 16 neuron brain with bias based
> >phototropism. Best to expiriment with as much as you can, huh! I know it
> >isn't as easy to bias, but I want to expiriment. I like the idea of a
> >robot that looks around and goes where it _looks_! Hehe! :)
> >
> >Dennison wrote:
> >>
> >> I really don't think thats possible with your layout. (and for Wilf
> there,
> >> Spyders, aren't anything to be familiar with. Spyder is the name of one
> of
> >> Mark T's bots. It's claim to fame is that it uses eight motors. Take
> note,
> >> there's a reason why there aren't more of them.) I don't think you can
> make
> >> the bot turn by biasing the NV's in your simplified design. The motors
> are
> >> all to interconnected. You can't bias one, without biasing others. It's
> too
> >> intertwined. The reason why it's a fractal type arrangemenet, and the
> pulese
> >> all "fall of the ledge" is because the central uCore is the devices CPG
> >> (central pattern generator) it generats the patters to co-ordinate the
> four
> >> Sub-CpG's which generate the sequences needed to controll the specifi
> leg.
> >> Turning is a matter mostly of changing the Central CPG, and then tweaking
> >> differently with the Sub-CPG's independently. Here the motors respond
> most
> >> to a phase shift, not a pulse durration shift. Much like when you put a
> two
> >> motor walker in reverse. Things get switched. No Nv biasing will get that
> >> done. And likewise, to turn under the condensed version of the stratified
> >> system for Stryder, I don't think it's possible. The simplified version
> is
> >> simmilar in process-firing order only.
> >>
> >> Dennison
> >>
> >> >I just know the layout. I'm still expirimenting with the leg sequences.
> >> >I want to bias the Nvs to allow it to turn. Shoudn't be that dificult.
> >> >The mechanics of the leg I did assemble (waiting for parts for the other
> >> >three legs). The one works amazingly well! It's nice! I can't wait to
> >> finish!!!
> >> >
> >> >Wilf Rigter wrote:
> >> >>
> >> >> Nice work Richard, I like the network topology pictures. I don't know
> >> >> anything about spyders. What is the leg sequence and what are the time
> >> >> constants of the network?
> >> >>
> >> >> regards
> >> >>
> >> >> Wilf Rigter mailto:wilf.rigter@powertech.bcca
> >> >> tel: (604)590-7493
> >> >> fax: (604)590-3411
> >> >>
> >> >> > -----Original Message-----
> >> >> > From: Richard Piotter [SMTP:richfile@rconnect.com]
> >> >> > Sent: Tuesday, April 13, 1999 1:23 PM
> >> >> > To: beam
> >> >> > Subject: Spyder VII
> >> >> >
> >> >> > I have an interesting variation on the microcore and specificly, the
> >> >> > branching microcore of Tilden's own Microcore Spyder. I've taken the
> >> >> > original from 16 neurons to 7!!! I noticed many Nvs shared the same
> >> >> > pulse simultaneously, so I did some thinking and came up with the
> >> >> > following Nv layout. It looks interesting. Some familiar symetry
> that
> >> >> > I've seen in more advanced neural networks, but a very simple
> layout! I
> >> >> > have a small picture. If anyone has an opinion on the variation,
> it's
> >> >> > definitely welcome...
> >> >> > --
> >> >> >
> >> >> >
> >> >> > Richard Piotter
> >> >> > richfile@rconnect.com
> >> >> >
> >> >> > The Richfiles Robotics & TI web page:
> >> >> > http://richfiles.calc.org
> >> >> >
> >> >> > For the BEAM Robotics list:
> >> >> > BEAM Robotics Tek FAQ
> >> >> > http://people.ne.mediaone.net/bushbo/beam/FAQ.html << File: Unknown
> >> >> > Document >>
> >> >
> >> >--
> >> >
> >> >
> >> >Richard Piotter
> >> >richfile@rconnect.com
> >> >
> >> >The Richfiles Robotics & TI web page:
> >> >http://richfiles.calc.org
> >> >
> >> >For the BEAM Robotics list:
> >> >BEAM Robotics Tek FAQ
> >> >http://people.ne.mediaone.net/bushbo/beam/FAQ.html
> >
> >--
> >
> >
> >Richard Piotter
> >richfile@rconnect.com
> >
> >The Richfiles Robotics & TI web page:
> >http://richfiles.calc.org
> >
> >For the BEAM Robotics list:
> >BEAM Robotics Tek FAQ
> >http://people.ne.mediaone.net/bushbo/beam/FAQ.html

--


Richard Piotter
richfile@rconnect.com

The Richfiles Robotics & TI web page:
http://richfiles.calc.org

For the BEAM Robotics list:
BEAM Robotics Tek FAQ
http://people.ne.mediaone.net/bushbo/beam/FAQ.html

------------------------------------------------------------------------
eGroup home: http://www.eGroups.com/list/alt-beam
Free Web-based e-mail groups by eGroups.com

Home