Alt-BEAM Archive
Message #04906
To: beam@sgiblab.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Sun, 27 Jun 1999 12:17:46 -0500
Subject: [alt-beam] Re: A new life is born
Wow! That thing is a fancy looking little bugger!!! With that aluminum
frame and all! Geez! What tools did you use and what size and where did
you get that aluminum.
The name is highly fitting!!!
A little tip, if you're happy withh the leg design with the coat
hangars, you could use them as models to bend the welding rod, so then
it'll all be silverish.
It looks... too proffesional to be BEAM!!! A robot with a frame that is
fabricated so nicely is just un common. Wire pieces, coat hangar and PCB
material usualy holds most BEAM bots together!!!
If you had the transparent plastic servos, you might reconsider their ugglines!
Shoot, maybe grab some silver paint for plastic models and paint the
servos silver to match! Not sure gow great that would look though. I
think it looks very nice now! maybe just use the welding rod for the
legs. It's great!!!
SG wrote:
>
> Hello All! Just like to introduce you to "Lotus I"
> My first walker.
> Based on Ian's "Almost compleate walker" circut found at
> http://www.beam-online.com/Robots/Circuits/circuits.html
> ALTHOUGH:
> 1.used 20 uf Cap instead of 30, this is for reverser, bigger cap, longer
> reverse time, .. (20 even seems to be even too long for me)
> 2.couldn't get 1.6M resistors, so used 1.5M
> 3.guys at many diff shops told me there was no such thing as a 2.5M
> resistor, had choice of 2.0 or 2.7, used 2.7M
> 4.used an IC socket, (i reccomend this for newbies when you get +and- mixed
> up, you can replaced the ic you just fried.
>
> I can say once and for all that YES this circut does werk and not too
> shabby either in my opinion! The reverser works like a dream too although
> i havn't got my Tactile sensor attached to the frame yet. touched the wire
> to grnd, and it backed perfectly.
> keep in mind this is my FIRST bot, havn't built a solar roller or
> photopooper yet. Heck i havn't even touched a soldering iron till i started
> this project!
> Thanks to IAN! what a help your page has been! (watch the H-Bridge be sure
> to read the NOTE on step 3. I think i'm the one that discovered this)
> Also thanks to you folks on this mail list for your input too!
> FRAME:
> Aluminum angle bar (very light) 7" lng. notched for angle at front
> held together with small machine screws. used rubber O-RINGS for washers
> where IC PCB is attached to frame.
> Has LED's showing when legs fire (very nice touch i thank whoever
> reccomended this)
> MOTORS:
> two CS-61 Hobbico Standard Servos $10 each (boy i think they're ugly, i
> much prefer the look of bg micros motors i've seen in pics)
> LEGS:
> Originally used 1/8" welding rod, but needed to practice on the leg
> semmetry a LOT, now using COAT HANGERS. Too bad, welding rod was silver
> like the frame. leg ends coated with plasti-dip. used longer (1-1/4")
> machine screws for "stops"
> POWER:
> 1.4V rechargable Batt. Manager at radio shack gave me ALL he had (5) for
> $10, he wanted em off the shelf. (they getting rid of them? try making
> offer to manager at R.S. in your area) attached to frame by electrical ties
> (not bad!)
> COMMENTS:
> still need to werk on legs, havn't got the shape quite right, front lift
> is only about 1/8 of an inch,... but other than that i feel like a proud
> parent.
> still need to add tactile sensor, i'll probably add two on each side of
> front to give that "bug" look. (though you only prob. need only one)
> lemme know yur comments i'm interested in wat you think.
> -Sparky
>
> ------------------------------------------------------------------------
> Name: lotus1.jpg
> lotus1.jpg Type: JPEG Image (image/jpeg)
> Encoding: base64
>
> ------------------------------------------------------------------------
--
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
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