Subject:
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RE: Casters
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 23 Aug 2000 16:04:52 GMT
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Original-From:
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Wilcox, Doug <doug.wilcox@i{AntiSpam}mckesson.com>
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Viewed:
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2026 times
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Although it's not obvious from the pictures, I do use two plates separated a
2-plate distance on the axles. I'm also using a cylinder piece (2x2), placed
upside-down as a bearing, which moves easily while helping to keep the
caster straight.
-----Original Message-----
From: news-gateway@lugnet.com [mailto:news-gateway@lugnet.com]On Behalf
Of Juergen Stuber
Sent: Wednesday, August 23, 2000 8:46 AM
To: lego-robotics@crynwr.com
Subject: Re: Casters
"Adrian Drake" <tremor@apk.net> writes:
>
> It might be thus: When the motors engage, there's some torque in the body
> that would tend to lift the nose of the vehicle up (think of a dragster, • how
> it pops a wheelie under acceleration). Thus, when under acceleration, the
> front of the vehicle is lifted slightly, loosening up the friction in the
> caster joint and allowing it to swivel more easily.
Yes, that's my impression too.
> From the pictures it seems that the caster joint is made
from a single plate with holes, which creates a lot of
friction because the axle cants(?) under weight. A better
design would be to use two plates at some distance.
Jürgen
--
Jürgen Stuber <stuber@loria.fr>
http://www.loria.fr/~stuber/
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