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[DPRG] DPRG Micro robots

Subject: [DPRG] DPRG Micro robots
From: David Peterson robodave1 at attbi.com
Date: Fri Nov 1 02:09:02 CST 2002

Hi Earl
   Pico is really smaller than nano. Going smallest to bigger, Femto refers
to a multiplier of  10^-15,  Pico is 10^-12, Nano is 10^-9, Micro is 10^-6.
Don't ya just love those metric prefixes? So I guess mini is supposed to be
a parallel to Milli, 10^-3, maybe. Wouldn't one class technically be 10 or
1000 times smaller than the last, rather than halves? Oh well.

   About micro-sumo weights, all I've read adhered to is the 100 g value, at
the NWRST, PARTs, and RoboMaxx where they've actually competed. If you look
at the different weights of the classes it sort of makes sense. A full size
is 20 cm by 20 cm and weighs 3000 grams, coming out to 7.5 grams per square
centimeter. A minisumo is 500 grams and is 10 cm by 10 cm, coming out to 5
grams per cm ^2. A micro at 5 cm by 5 cm for an area of 25 square should
point to 100 grams (actually less) giving it 4 grams per square cm, sort of
a close continuation. At 200 grams it would become 8 grams per square cm,
even more grams per square centimeter than Full size allows. If you assumed
similar height restriction to full sized and minisumo classes, and used a
volumetric measure, then full would be 0.375 grams per cubic cm, mini would
be 0.5 g/cm^3, micro would be 0.8 g/cm^3 at 100 grams. At 200 grams it
becomes 1.6 grams per cubic centimeter, way out of the ball park.  No weight
limit has been shown for the Nano-sumo size, just getting one built that
small is probably difficult enough. Haven't actually seen a Nano yet, but it
should be pretty cute. I do remember seeing a Micro pushing an apple around
at Robothon, pretty cool.


----- Original Message -----
>From: "Earl Bollinger" <earlwbollinger at attbi.com>
To: <dprglist at dprg.org>
Sent: Thursday, October 31, 2002 8:17 PM
Subject: RE: [DPRG] DPRG Micro robots

> Actually PICO is larger than NANO.
> PICO-? maybe 75cm cubed (a little under 3inches). 300 grams.
> Would make for a nice mini-can-can size robot for table top robotics.
> NANOSUMO is 2.5cm X 2.5cm X 2.5cm no weight limit. At this size why bother
> with weight.
> Femto-Sumo?
> There is a 1 cubic centimeter class for mouse mazes. The only robots I
> for this were made in Italy to compete in Japan where they had a number of
> them in this size.
> I thought Micro-sumo had a 200g weight limit.
> -----Original Message-----
> From: dprglist-admin at dprg.org [mailto:dprglist-admin at dprg.org]On Behalf
> Of Bob Jordan
> Sent: Thursday, October 31, 2002 1:57 PM
> To: 'David Peterson'; dprglist at dprg.org
> Subject: RE: [DPRG] DPRG Micro robots
> David,
> Hello!
> What are the standards for the sumo robots?
> Size, weight, arena size, etc.
> 1. SUMO - size is 20 cm X 20 cm and no height limit, 1000 grams,
> 2. MINI SUMO - size is 10 cm X 10 cm no height limit, 500 grams, +/-30"
> arena
> 3. MICROSUMO - size at 5 cm x 5 cm x 5 cm and 100 grams
> Do you have a URL that states this clearly? Perhaps, we could
> get a link to it on the DPRG site.
> Thanks
> Bob Jordan
> -----Original Message-----
> From: David Peterson [SMTP:robodave1 at attbi.com]
> Sent: Thursday, October 31, 2002 12:31 PM
> To: Steve Davee; dprglist at dprg.org
> Subject: Re: [DPRG] DPRG Micro robots
> Hey Steve,
>   Saw this passed by and hoped to answer you. Experiments with microbots
> have been a little limited here. Earl has been working on some tiny
> mount PCBs of various types and has some interesting little Smoovy motors
> for nanosumo I believe, and some other interesting stuff for micro,
> even a robot close to microsumo size. He could better answer his own part
> to how far he's gotten, Earl had some interesting little robots at our
> recent Tabletop Competition and Barbeque at a members home. See the DPRG
> competitions link to see some pictures from the contest, though some are
> difficult to scale.
>   As for myself, I've got some decent sized motors and batteries for a
> minisumo and a microsumo, possibly a micormouse as well. My possible
> microsumo motors are the floppy eject mechanism motors, possibly to modify
> in some manner, but not torn into yet. I look at the Microsumo size at 5
> x 5 cm x 5 cm and 100 grams, as just maybe possible, nano-size getting
> pretty scarily small. I do have some pager motors to attempt a possible
> though, just the 2.5 cm by 2.5 cm by 2.5 cm size seems somewhat difficult.
> Earl has explored further than I, so about pictures, there aren't really
> many since the bots are pretty much still in development.  It's been
> cool to read about the micros at RoboMaxx, keep hoping to see more pics of
> the event and the bots competeing there.
> Dave
> ----- Original Message -----
> From: "Steve Davee" <pxlkrz at yahoo.com>
> To: <dprglist at dprg.org>
> Sent: Tuesday, October 29, 2002 1:43 PM
> Subject: [DPRG] DPRG Micro robots
> > Howdy All,
> > Greetings from the PARTS part of the word.
> > I am curious if pictures of the small robots being
> > developed by DPRG club members are posted somewhere.
> > I've read hints of what Dave and Earl have been
> > working on, but I would love to hear more details and
> > see some pictures. Interest in smaller robots is
> > gathering up here in Oregon, we actually had 5
> > micro-sumo entrants in SORC's RoboMaxx comp. I know
> > we'd all be interested in seeing what DPRG has been up
> > to.
> > Thanks!
> > Steve
> > -----------------------------------------------------
> > Build *smaller* robots!
> >
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