Subject:
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Re: Versions 2 and 3 of micromotorized crossing gates.
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Newsgroups:
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lugnet.trains
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Date:
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Fri, 5 Sep 2003 16:23:00 GMT
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Viewed:
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2479 times
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In lugnet.org.us.indylug, James Powell wrote:
> > Awesome looking crossing. I like the small size of the motors. What do you
> > use to control this? I was in a hobby store last week looking at DCC stuff
> > and they had crossing sensors for this sort of thing.
>
>
> That's what a RCX with a extra light sensor is for (or homemade light sensors).
>
> Either option beats the pants off how I did my first automatic crossing system-
*snip*
You mean RCX w/light sensor as one option and DCC as another option? How would
you tie in the logic for it, if not using manual controls via DCC? Just
curious.
> > Also, what happens with the gate is down? Do you have to manually stop the
> > motor so it doesn't burn out? I've been thinking about how to fit a
> > microswitch in to a 1x2 brick with a 1x2 tile on top as the sensor for when
> > one of these type of gate is up or down. Has anyone done any work with
> > this??
>
>
> I'm assuming here that the crossing uses the normal style of micromotor driving
> crossing gates via a rubber band- you don't need to be fancy, just use the dwell
> time. Drive the gates down slightly longer than the reverse time, so they come
> to a complete stop against the lower stops. Simple, and it works. Be warned,
> that doing so with the micro motors direct coupled to the crossing arms is not
> recommended, since it tends to lock the micromotor solid, requiring human
> assistance to get it to turn again.
Excellent point - take James' advice on this!
Ed
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Message has 1 Reply:
 | | Re: Versions 2 and 3 of micromotorized crossing gates.
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| (...) I've been thinking about this one. In the current state of LDCC, a fully automated and LDCC-integrated (and pure LEGO) crossing gate could look something like this (ASCII art follows): Train presence sensor------+-------+ + RCX 1 | (...) (23 years ago, 7-Sep-03, to lugnet.trains)
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