Alt-BEAM Archive

Message #07205



To: beam@sgiblab.sgi.com
From: "Timothy Flytcher" flytch@hotmail.com
Date: Sun, 31 Oct 1999 02:48:40 PST
Subject: [alt-beam] Re: Time Capsules


>| my r/c friends magnetize their competition motors
>| on a regular basis...
>| I have seen gains of 10%-30%
>| by disassembly of the motor
>| and magnetizing the magnets
>| and demagnetizing the armature.
>
>Tim,
>How is that done, exactly?
>
>jlz

First off we are talking about a motor that is "stock" and can't be
"modified in any way", including timing. That is the class of racing. These
are "can type" ~600 watt ~1 1/2 inches in diameter and ~2 inches long.

Now the nuts and bolts... remove the back plate and armature by bending the
tabs out with pliers. carefully remove the back plate an from the motor
housing by pushing on the shaft. removing the armature with the backplate to
avoid bending the brush springs. Then dissemble everything... Throughly
clean all seven parts. Place the case (motor housing and magnets) in the
magnetizer for 30 seconds. Place the armature in the demagnetizeser for
about 10 seconds. Then carefully assemble motor only applying lubricant only
to the shaft and bushings. Retest on dynamometer and rate it for that nights
race...

To truly be competitive in stock class takes a minimum of four hours of prep
time just before the race and ~$3,000 worth of tools... motors cost $10 to
$15 each...
Timothy...



______________________________________________________



7206 Sun, 31 Oct 1999 06:45:30 -0500 [alt-beam] Re: photoetching beam@sgiblab.sgi.com Richard Weait At 01:29 AM 10/31/99 -0700, you wrote:
>BEAMers,
>well, I have just outfitted my shop for photoetching. I bought an M.G.
>Chemicals photoetching set for around $40 canadian. I seems to work great. I
>really enjoy doing this stuff. The only problem I seem to have is getting
>the traces to look proffesional. Am I expecting too much?
>Greg

Greg, I'm sure you'll see that the artwork that you start with
has everything to do with the finished quality.

I've seen wonderful results from home photo-etching. No, Really!
Mind you they weren't _my_ results :-) The boards that I've seen
Rick D. make have straight even lines and good layer registration.
The layout, as a separate issue from the execution, is great too.
I think he might even share his secret formula with us if we ask
nicely. I don't recall if he plots directly to a transparency, or
if he plots and then copies to transparency.

Cheers,

Richard.



7207 Sun, 31 Oct 1999 08:02:19 -0500 [alt-beam] Re: Elementary, My Dear Watson... "Richard Caudle"


content-transfer-encoding: quoted-printable


---------------------------------------------------------------------------=
-----

Hello Ian et. al.,

I mentioned an article from Scientific American (from on or about 1987) cal=
led "Collective Computation in Neuronlike Circuits" a couple weeks ago that=
addreses the subject of your post. It was written by David W. Tank and Jo=
hn J Hopfield. I've yet to have the opportunity to scan this so the rest o=
f the list could have it to read. SciAm dosen't even have a copy of it! =


The flip flop circuit in the article is similar to a BiCORE, so I made the =
logical assumption that it was a ProtoBEAM circuit. Attached is my renderi=
ng of the circuit. The values are non-essential, as they're the ones that =
I always start with when building BEAM circuits (default, if you will). I =
built this one with a 74HC14, but it didn't work very well. I've yet to tr=
y a '240. I've even given thought to using a '245. =


My thoughts on this are to use a '240 or some such thing like that to use a=
s a 'plug in' memory unit that can be chained together to form larger memor=
ies. Also these memories (ideally) would be externally as well as internal=
ly initiated. By this I mean that several BEAM robots would be IR linked t=
ogether (or RF, whichever is easier) in order to make up a larger secondary=
neural network or collective network. =


This kind of thing has been bandied about quite a lot on the list, but no a=
ctual circuitry has been offered. All that seems to go on is talk...Reg wi=
ll not be taking part in any terrorist action as he has a bad back...that s=
ort of thing. Let's work together and see what we can come up with. =


It is my sincerest hope that none will be bored by this line of discussion.=
=

=

Richard Caudle
www.geocities.com/frankendaddy
Home ICQ - Frankendaddy

---------------------------------------------------------------------------=
-----

Guardians of the sacred words: Nee, Ptang, and NeeWhon! =





content-transfer-encoding: quoted-printable



>




Hello Ian et. al.,

 

I mentioned an article from Scie=
ntific =

American (from on or about 1987) called "Collective Computation in Neuronli=
ke =

Circuits" a couple weeks ago that addreses the subject of your post.&n=
bsp; =

It was written by David W. Tank and John J Hopfield.  I've yet to have=
the =

opportunity to scan this so the rest of the list could have it to read.&nbs=
p; =

SciAm dosen't even have a copy of it! 

 

The flip flop circuit in the art=
icle =

is similar to a BiCORE, so I made the logical assumption that it was a=
=

ProtoBEAM circuit.  Attached is my rendering of the circuit.  The=
=

values are non-essential, as they're the ones that I always start with when=
=

building BEAM circuits (default, if you will).  I built this one with =
a =

74HC14, but it didn't work very well.  I've yet to try a '240.  I=
've =

even given thought to using a '245. 

 

My thoughts on this are to use a=
'240 or =

some such thing like that to use as a 'plug in' memory unit that can be cha=
ined =

together to form larger memories.  Also these memories (ideally) would=
be =

externally as well as internally initiated.  By this I mean t=
hat =

several BEAM robots would be IR linked together (or RF, whichever is easier=
) in =

order to make up a larger secondary neural network or collective =

network.  

 

This kind of thing has been band=
ied about =

quite a lot on the list, but no actual circuitry has been offered.  Al=
l =

that seems to go on is talk...Reg will no=
t be =

taking part in any terrorist action as he has a bad =

back
...that sort of thing.  Let's work together a=
nd =

see what we can come up with.  

 

It is my sincerest hope that non=
e will be =

bored by this line of discussion. 

 

Richard Caudle

href=3D"
www.geocities.com/frankendad=">http://www.geocities.com/frankendaddy">www.geocities.com/frankendad=
dy
Home =

ICQ - Frankendaddy





Guardians of the sacred words: N=
ee, =

Ptang, and NeeWhon!         =


 

 






Attachment: sciamflipflop.jpg

Home