Alt-BEAM Archive

Message #08146



To: beam@sgiblab.sgi.com
From: Blumojo13@aol.com
Date: Tue, 7 Dec 1999 08:00:39 EST
Subject: [alt-beam] voltage problem


I'm building a beambot using a micro cassette motor(3v). I'm using a 1381 J
as a trigger and 2 3300uf caps in series. I have two 373334 solar cells
hooked up in series. The problem is the motor will turn but it looks like the
second hand on a watch. Moving in slow precise movements, like it is ticking
off seconds. Will changing to a 1381L make this bot work properly?

Blumojo13



8147 Tue, 07 Dec 1999 07:37:09 -0600 [alt-beam] Re: pshead project and 3M3D circuit beam@sgiblab.sgi.com Richard Piotter Hexapod and Quadrapod both can turn on a dime. imagine the alternalte cornered
legs moving the same direction and lifting the same too. when one of those
functions (like the fwd back motion) is reversed for a whole side, (at least for
Quadrapod), it makes it begin rotating on it's center axis. It'll lumber about
doing it, since it's leaning leg to leg, but not much though. if you simply halt
the leg motion of one side, but keep the legs lifting on a Quadrapod, you get a
wider angle turn.

SG wrote:

> Hi folks!
> i just wanted to write the list and Thank Wilf and all the others for the
> help!
> i have the solar version werking with Wilf's 1.1 circuit, but all i have is
> some 4700uf caps and the burst of power are kinda short.
> so I think I'm gonna stick with the batteries.
> All i have to do now is redo my "dome" by placing the LDRs lower and I'm
> all finished! It works great! (Thanks agin Wilf!)
>
> As for my next project, i just gotta take a crak at the 3M3D circuit Wilf
> sent a few days ago! the pause betweens pulses looks interesting and quite
> versitile with the resistor values. Has there been a Beam Hexapod before?
> I think I have the leg motion figgured out:
> 1st pulse: middle leg assembly goes down on left, provides Lift to right side
> 2nd pulse: right legs move forward
> 3rd pulse: left legs move back (pulling the bot forward)
> 4th,5th, 6th pulses are opposite
> is this right?
> I heard a Hexapod could turn on a dime.. but having never seen a Hex in
> motion, i just can't quite grok how you would make this happen!
> any thoughts?
> -Sparkahooee

--


Richard Piotter The Richfiles Robotics & TI web page:
richfile@rconnect.com http://richfiles.calc.org

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