Alt-BEAM Archive
Message #12960
To: beam@sgiblab.sgi.com
From: SG [mailto:sparkyg@seark.net]
Date: Mon, 3 Apr 2000 14:22:58 -0400
Subject: turning walker...pics
ok, many of the newbies have been asking for pics, so i have a few
quickies fer ya.
again, let me stress that the turning of the bot is a result of the
Mechanical design, not the electrical circuit.
take a look at the pics for a general idea and i'll answer questions as
well as i can.
pic can be found at the Yahoo Beam Robotics club, in "various member's pics"
under "scorpio"
-Sparky
12961 Mon, 03 Apr 2000 13:17:00 -0500 RE: Almost Complete Walker beam@sgiblab.sgi.com SG --=====================_954803820==_
At 08:33 AM 4/3/00 -0700, you wrote:
>Hey, that's great!
>
>I'm anxiously awaiting the birth of a son (August 6) and I like to imagine
>teaching him to build bots.
12962 Mon, 03 Apr 2000 13:32:22 -0500 Re: Almost Complete Walker beam@sgiblab.sgi.com Richard Piotter I was wondering...
Can brass servo "horns" be purchased anywhere? That'd be perfect for
mounting legs to servos!
"Phillip A. Ryals" wrote:
>
> Hey, that's great!
>
> I'm anxiously awaiting the birth of a son (August 6) and I like to imagine
> teaching him to build bots. How old was Kyle before he really got into it?
>
> The bit about attaching the legs to the servos... Has he tried epoxy? I
> just use old clothes hangers cut to the proper length, bend them, and attach
> them to the servo horns. I put in an extra bend in the center and rough it
> up with some cutters so there's plenty for the epoxy to grab onto. It works
> like a charm.
>
> Tell him congrats, btw.
>
> -phillip
>
> ----- Original Message -----
> From: David Simmons
> To:
> Cc:
> Sent: Sunday, April 02, 2000 8:26 PM
> Subject: Almost Complete Walker
>
> > Hey All,
> >
> > Almost complete walker complete, almost.
> >
> > I mentioned last week that Kyle (9 going on ten for those that don't
> > know) had started to breadboard the almost compete walker circuit of
> > Beam Online fame. I expected several failures the first time round due
> > to the pure number of connections. Consider, the addition of the two
> > H-Bridges, and LEDs to indicate gait. However he made only one mistake,
> > missing a pin with one of the .22uf caps, which didn't long for him to
> > debug.
> >
> > The same day he started to layout the circuit on pref. board, was nearly
> > complete when he had to put it to the side for a few days. The week was
> > nuts so he wasn't able to get back to the project until yesterday.
> > Yesterday he completed the pref. board and the frame work and hooked it
> > all up with jumpers. At that moment he was ready failure, or at least
> > major problems. At first it just wiggled around in one spot, with a
> > quick flip of the connections for the back servo and it started to walk
> > across the table. He tested the reverse, and the started to finish off
> > the body etc.
> >
> > Today he was busy right from the morning to get everything just the way
> > he wanted it so it will ready to show off to a few friends, grandparents
> > and so on. Making the tactile sensor, mounting it, mounting the battery
> > pack and so on.
> >
> > For the entire project my involvement was limited to a little dremel
> > work, and paying for the parts. This one he wanted to do all on his own.
> >
> > O.K. the proud Dad part is over.
> >
> > There is some work left to be done, he plans on making some better legs
> > once he finds a better way to mount to the servos and gluing down the
> > power switch. Just little details like that.
> >
> > Thanks to all the talk about the almost complete walker over the past
> > few weeks that I've been passing onto Kyle he was well prepared for the
> > problems that occurred and to avoid most of them all together.
> >
> > Regards,
> > Dave
> >
--
Richard Piotter The Richfiles Robotics & TI web page:
richfile@rconnect.com http://richfiles.calc.org
-- Make Money by Simply Surfing the Net or responding to E-Mail!!!
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12963 Mon, 3 Apr 2000 14:43:42 EDT Re: Conductive Epoxy? beam@sgiblab.sgi.com JVernonM@aol.com In a message dated 4/3/00 2:29:15 PM Eastern Daylight Time,
flytch@hotmail.com writes:
> I believe you only
> make money with it if you can reuse your screens for an extended time???
Or
> have I not seen disposable screens???
No, you are correct. Wilf's idea got me going in another direction. I was
thinking of using conductive plastisol inks. They remain open (won't cure)
forever. The hardening process occurs in a tunnel dryer. The screens would be
completely reclaimable. And one could come up with a lot of different
applications. I was just curious as to what kind of sensor could be made this
way.
See ya,
Jim
http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
ICQ# 55657870
12965 Mon, 03 Apr 2000 19:34:39 +0000 Re: Almost Complete Walker beam@sgiblab.sgi.com "Phillip A. Ryals" The problem is that different manufacturers use different sizes for that little
plastic part that they mount on to. I have a few different brands and none of
their servo horns work together. So I'm *guessing* that you'd have to find one
specifically for Futaba, Airtronics, etc.
You're right though, they rock. If a source of metal horns could be found, they
would be even better. I'd love to be able to solder the legs on.
-phillip
Richard Piotter wrote:
> I was wondering...
>
> Can brass servo "horns" be purchased anywhere? That'd be perfect for
> mounting legs to servos!
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