Subject:
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Re: Back wheel construction advice
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 18 Mar 2003 17:34:01 GMT
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Viewed:
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881 times
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In lugnet.robotics, Gus Jansson writes:
> > I don't understand why you'd choose a wheel with such a wide 'grippy'
> > tire. You want the wheel to spin on the spot with minimum friction,
> > so wouldn't you want to use a large pulley with a thin tire?
>
> Sure, you can make a caster with the pulley wheel and thin tire though I
> think it is a little less elegant. For one thing, since the pulley wheel is
> only 1/2 unit wide, it will slop around unless you use a longer axle and
> bushings on the ends to keep it centered. The pulley wheel is also larger
> in diameter so it requires a slightly different construction in the caster
> assembly to keep it from rubbing.
>
> BTW, I do have robots that use the pulley wheel as caster.
>
> Gus Jansson
A better idea yet is to use the pulley wheel without a tire. There is no
need for traction in the caster. A hard plastic wheel allows the caster to
act like a skid sometimes and minimizes the caster steer experienced when
straightening out casters that have grippy tires.
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Message is in Reply To:
 | | Re: Back wheel construction advice
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| (...) Sure, you can make a caster with the pulley wheel and thin tire though I think it is a little less elegant. For one thing, since the pulley wheel is only 1/2 unit wide, it will slop around unless you use a longer axle and bushings on the ends (...) (22 years ago, 18-Mar-03, to lugnet.robotics)
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