Alt-BEAM Archive
Message #01667
To: Chris Daniel popjester@hotmail.com
From: James Niemasik jfn@best.com
Date: Sun, 21 Mar 1999 17:46:45 -0800
Subject: [alt-beam] Re: walker process probs....
A PNC is a "process neutralization circuit". You can use a manual switch or
you can make an "auto-PNC" that will destroy all processes but one
automatically. Look at Andrew Miller's walker tutorial
(http://www.xs4all.nl/~vsim/amiller/microcore.html),
BEAM Tek
(http://people.ne.mediaone.net/bushbo/beam/main.html),
and Chiu's page (look
at his walkers which use auto-PNC's) at
http://www.geocities.com/SouthBeach/6897/beam2.html.
Hope this helps.
Chris Daniel wrote:
> What is a PNC? I think I had the exact same problem when I tried to make
> my last microcore, which still doesn't work! With the LEDs there are
> always two on at the same time when motors are attached, but without
> motors (just the LEDs) I can get the circuit it work (it's supposed to
> look like four "chaser" lights right? - 1, 2, 3, 4, 1, 2...)
>
> Chris
>
> \
> >yes, i understand your situation, it happend to me a few months ago...
> >normal though, ... anyways,
> >
> >1. do u have a PNC in your uCore?
> >
> >2. Do u have a pnc that has a time constant too short? -- i tend to
> use
> >something like a 1meg resistor and 10 uF cap, that way its real long
> and
> >kills everything. then releases 1 pulse
> >
> >3. yes that thing when both motors move at same time is the saturated
> >state, it does not seem useful really for a two motor walker, because
> one
> >leg pushes forward and the other pushes backwards,,, not very
> >productive.. so u need to use a pnc and then see if anything happens..
> >good luck
> >
> >jonathan wolter
> >
> >
> >>Maybe you guys could help me out. I've breadboarded a 'miller-style
> >>walker', but am having some problems controlling the microcore. If
> >>I
> >>disconnect the 74HC245 motor driver, I can get the microcore to
> >>produce the
> >>results I'm looking for. I can cycle through the processes properly,
> >>and
> >>add or subtract processes from the loop, but as soon as I add the
> >>motor
> >>driver, it goes into its 'saturated' state. My walker does achieve
> >>forward
> >>motion, but it does it by rotating the front motor clockwise and the
> >>rear
> >>counter clockwise at the same time and visa versa. As I understand
> >>it, it
> >>should move the front motor clockwise, then the back counterclockwise,
> >>then
> >>the front counter, with one motion coming after the other. Is this
> >>normal?
> >>Should it be moving two motors at the same time???
> >>
> >>Any advice would be appreciated.
> >>
> >>Thanks boyz...
> >>
> >
> >---------------------------------------------------
> >Jonathan Wolter
> >NE. IN, USA
> >email.... j.cobbs@juno.com ICQ: 27102252 talk to
> me!!!
> > please
> >aol instant messanger: jcobbers
> >
> >___________________________________________________________________
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> >
>
>
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