Alt-BEAM Archive
Message #11969
To: beam@sgiblab.sgi.com
From: Darrell Johnson beamtastic@yahoo.com
Date: Thu, 16 Mar 2000 13:28:21 -0800 (PST)
Subject: [alt-beam] Re: FW: ....microcore question....
Please use some restraint when posting attachments to
the list.... If you're going to send a black and white
schematic to the list, make sure the file size is
small. The PSH schematic I sent to the list the other
day was like 2k or so.. Your attachment was 200k.
here's a couple of tips:
-use a reasonable resolution for the picture. Try
400x400 pixels.
-if the image is black and white, save it as a 2 color
GIF file. If it is color, save it as a JPG with mid
to low quality.
If you want big, shiny pictures, post them on a web
page.
Hope I'm not sounding like a list-cop, but I don't
like my mailbox getting cluttered up for no reason.
darrell
--- "Scolman,Jim" wrote:
>
>
>
> > Hi, the enclosed circuit is described as a
> master/slave bicore.......it
<<>>
=====
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11970 Thu, 16 Mar 2000 04:00:17 -0800 [alt-beam] Re: walker motor gear ratio "Dennison Bertram" 300:1 is a little bit high, although there will be plenty of torque and they
should work fine as long as the RPMs are fast enough for you.
30:1 is a little bit too low. I wouldn't expect you to be able to build a
walker with this kind of reduction. They would work well in a wheeled bot
however. AS long as the bot was light.
More like 100:1 is a good medium value.
dennison
In a message dated Wed, 15 Mar 2000 6:43:31 PM Eastern Standard Time,
walkau writes:
> a friend of mine mentioned that he has some motors with a built in gear
> reduction ratio of 300:1. (voltages 1.5 to 12v)
>
> i was wondering if they would be useful for the BEAM walkers?
>
> thanks for any insight.
>
> niels
I believe that anything between 30:1 and 300:1 was what i was told was a
good ratio for gear motors. They should work good, you'll just have to try
it and find out!
-Spencer
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