Alt-BEAM Archive
Message #04411
To: beam@sgiblab.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Thu, 10 Jun 1999 16:06:01 -0500
Subject: [alt-beam] Re: thoughts from a day at the zoo
Such a method WOULD hoever work nicely on a 4 legged 8 motor walker (i
believe I mentioned this). For the 2, 3, 4, & 5 motor walkers comonly
built for BEAM this might not be the best bet, BUT like I said before,
if each leg can separately lift and drop, and can push forward and
backward, this is actualy a useful idea. Continue the up/down motion of
all legs (keeps legs from twisting or dragging while turning). To make I
turn around a wide radius, stop the front back motors on one side of the
robot. to turn on a dime, reverse one side of the robot. Rather simple.
I even designed a logic circuit that can command a 4 leg 8 motor walker
to do all that with only 5 inputs (a master stop signal, forward,
backward, left, and right). It can be driven with a simple 6 unit Nv
Microcore or a 6 bit shift register.
Gadagada@aol.com wrote:
>
> In a message dated 99-06-09 00:06:22 EDT, sparkyg@seark.net writes:
>
> << I
> realesed the brake (flippin lever up w/foot) on ONE wheel, and started to
> push, the stroller went around in a circle as applied the force. Using the
> remaining locked wheel as a pivot (a good one).
> sooooo... i thought hmmmm... maybe thats it, say you had a four motor
> walker with a "Head". the head turns toward the light (lets say you want
> it phototropic, or "voric" or watever) and then locks on leg in place the
> leg remains locked, (simply not turned on) till the body is in line with
> the head and then all leg motors are operational again. >>
>
> Interesting idea. But as someone has said, not for a walker. However, how
> about a wheeled bot. You could attach a head onto a photovore so that as it
> turns towards the light, it would turn a pot thereby changing the speed of
> the motors so that the bot begins to turn towards the light. I'm always
> looking for new and interesting ways to implement phototropisms in wheeled
> bots, and this one is mighty interesting. The finished product would look
> neat too. Thanks for the inspiration!
>
> Gary
--
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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