Subject:
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Re: motorized points - beating a dead horse
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Newsgroups:
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lugnet.trains, lugnet.robotics
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Date:
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Sat, 2 Dec 2000 22:04:31 GMT
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Viewed:
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72 times
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"sebarile-MOBL" <steve.e.barile@intel.com> writes:
>
> Currently I am attempting to build an automated hump yard. The main problem
> I'm tackling is the RCX controlled motorized points. I've spent 7 hours over
> the last two days trying to build a motorized switch track that will run
> forever with out ripping itself off the base plates and be very *forgiving*
> at the edges of both states, turn or straight. What I mean by forgiving is
> that the motor doesn't burn up or the gears do not get stripped off.
>
> I like really simple and elegant solutions. For instance I would like to be
> CPU switched with no feedback, again forgiving at the edges of both states
> such that the motor can spin for 1.5 secs and not reap havoc. Hanging
> elaborate clutch systems with differentials and angle sensors would not be
> my first choice. Of course beggers can't be choosers.
I'm not exactly sure about your setup (I'm not into trains),
but how about a small pulley (half bushing) on the motor,
driving a medium pulley (with the six holes) on an axle on
whose other end is an 8t gear that drives a rack.
That setup works well for rack and pinion steering,
where you have similar problems.
If one pulley/rubber band is not enough you can put another one
in parallel (like in 8480), or you can experiment with the tension
of the rubber bands.
Jürgen
--
Jürgen Stuber <stuber@loria.fr>
http://www.loria.fr/~stuber/
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Message has 1 Reply:
Message is in Reply To:
 | | motorized points - beating a dead horse
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| Hi All, Currently I am attempting to build an automated hump yard. The main problem I'm tackling is the RCX controlled motorized points. I've spent 7 hours over the last two days trying to build a motorized switch track that will run forever with (...) (24 years ago, 30-Nov-00, to lugnet.trains, lugnet.robotics)
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