Alt-BEAM Archive
Message #06696
To: beam@sgiblab.sgi.com
From: Mike Kulesza mikekulesza@hotmail.com
Date: Tue, 12 Oct 1999 23:26:31 -0400
Subject: Re: What do I Need? - J Wilson's Gearmotors
>
> I was one of the people that bought james Wilson's $5 gear motors. I
screwed
> in and epoxied a long screw to the center of the output gear, and had the
> legs attached about 5 - 8 cm form the gear on a thingy that you put in a
> wall, it flips open, and you cant pull it back out. (I forgot the name,
but
> its two halfpipes, attached by a spring, that causes it to open and
close).
> The legs were pressed tightly against a screw to this device. However,
this
> walker is now scrapped, since the motors were quite weak, were to fast,
and
> a quite heavy. I measured about 75 rpm @ 5V. The walker could not even
lift
> its legs. I image that the source of these motors was from some sort of
> recorder...
>
> Oh well, this time i used hand made gear motors, made of plexiglass, and
> smaller motors. They have very high torque, and are quite effective. As
for
> James Wilson's gear motors, they will probably be incorporqated into a
> head...
>
> >From: "James Wilson"
> >Reply-To: beam@sgiblab.sgi.com
> >To:
> >Subject: Re: What do I need?
> >Date: Tue, 12 Oct 1999 18:55:30 -0400
> >
> >A while back I came accross some very efficient gear motors and sold some
> >of
> >them over the list at 5$ cdn each I thought that it was a great deal.
Many
> >of you complained b/c they did not have an out put shaft, so much for
> >ingenuity!. I have recently had some time to get back into beam and
built
> >a
> >walker out of them, my mechanics need a little work but one thing to
> >remember is that not a single walker design calls for 360ø of rotation
for
> >a
> >leg or leg pair. The largest one could possibly utilize is a swing of
90ø.
> >But that too is impractical. The optimum is, imho, between 30ø and 60ø,
> >which my motors will easily accomodate. They turn nearly 180ø with my
> >current setup, I drilled a hole in the out put gear and screwed the leggs
> >to
> >it. These have built in mechanical stops and heaps and heaps of torque.
> >The most recent mucking about I have done is with Chiu's Two Motor Walker
> >and I used 5M resistors in my microcore instead of 1.5M and an LS driver.
> >The walker woked really well, almost to much power! But like I said my
> >mechanics need some work cause the darn thing gets it leggs stuck and
then
> >just flips it self over and goes into saturation but as with all beam
stuff
> >I will tweak and triumph. Last night I tried them with the beam ant
> >circuit
> >using an acx for a driver works great! So for those out there that are
> >willing to tweak I can get more motors the price is the same just let me
> >know!
> >
> >James :-))
> >----- Original Message -----
> >From: Senior
> >To:
> >Sent: Monday, October 11, 1999 10:59 PM
> >Subject: Re: What do I need?
> >
> >
> > > Well, you'll have to do a bit of studying and decision making.
> > > Some comments:
> > > 1 - It's hard to get 2 motor walkers to do much, like turning, but
> > > reversing is no problem, and you could most likely tweak it to get it
to
> > > turn.
> > > 2 - It aint gonna be cheap. Motors that walkers use are extremely hard
> > > to come by and especially when their cheap. You could use servos,
which
> > > are 10 bux a peice, but that right there is 20 dollars, which is out
of
> > > my budget.
> > >
> > > Uh... that's about it.
> > > You could use the traditional walker from:
> > > http://www.golden.net/~amiller/
> > >
> > > Or the bicore walker thing from Ian's site:
> > > http://www.beam-online.com
(it's in there somewhere...)
> > >
> > > And check out the FAQ:
> > > http://people.ne.mediaone.net/bushbo/beam/FAQ.html
> > >
> > > After reading each of those sites carefully, you will know how to
build
> > > a walker! Ta da!
> > >
> > > Happy Beaming,
> > > Kyle
> > >
> > > Chris wrote:
> > > >
> > > > Ok, Here's my deal. Since I'm only 15 and do not have a job I want
to
> >get the most bang for my buck. I need to know what I need to make a 2
> >motor
> >walker with 4 touch sensors, 2 photodiode eyes, that can go backwards,
> >right, left, forward, is nocturnal. By nocturnal I mean uses a solar
cell
> >in daytime to charge its batteries when it bicore is off, then at night
it
> >turns itself on. So I need to know what I need because I don't want to
> >have
> >to pay shipping and handling twice (or more). And I need a site that
tells
> >me how to hook these things up.
> > > >
> > > > I'm new to all of this BEAM stuff, but I pick things up fairly
easily.
> > > >
> > > > Win a LAPTOP Computer and get your FREE E-mail Account at
> >http://mail.chek.com
> >
>
> ______________________________________________________
>
6697 Tue, 12 Oct 99 22:20:49 -0600 [alt-beam] Re: What do I need? Ian Bernstein Hi,
>I have recently had some time to get back into beam and built a
>walker out of them, my mechanics need a little work but one thing to
>remember is that not a single walker design calls for 360=B0 of rotation =
for a
>leg or leg pair.
Just for the records I had "Mantis" hooked up so that when he bumped =
an object his front legs would spin around a few times causeing him =
to turn. Worked well and could work even better if the walker was =
designed for that.
PS: Sorry I don't have the CW2 scematic on my site yet. I have it =
done but I want to finish up a couple other things before I upload =
it. You'll be VERY happy when I'm done, trust me!!!!
Laterz
--------
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