Subject:
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Re: Automated RT - Acceleration with RCX
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Newsgroups:
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lugnet.trains
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Date:
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Sat, 2 Dec 2000 21:59:38 GMT
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Viewed:
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932 times
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On Sat, Dec 02, 2000 at 09:07:55PM +0000, Rebel Transcanner wrote:
Your idea sounds similar to something Tom Cook and me worked on a while
ago. Take a look at :
http://www.peeron.com/pics/loop/
we had a simpler setup though - 1 track, to be used for 2 way traffic, and
two stations. We also wanted to run 3 trains, so one train had to be
running at all times.
> So... I've got an eastbound/westbound track. Station A, B, and C would all
> be connected to one of three outputs on the RCX. I'll figure out sensing
> later. The sections of track between the stations, which are insulated from
> the stations themselves (I'm assuming it's possible to isolate sections -
> how might I do that?), would be powered via a speed regulator at some
> constant voltage. Ideally I'd have two trains (although that's a little ways
> away; I'll likely just start up with one and see how that goes), so let's
> start at Station A.
Isolating track is fairly simple - you just disconnect the track, and hold
it in place 1 stud apart... The trains don't mind it at all, though it
does mess up lego geometry if you're not careful.
> RCX Output A would accelerate the train, by presumabally ramping up the
> power output (from 0-7) at some spaced time interval between the PWM level
> shifts. A snesor would say "ok, we've cleared the platform and the train is
> on the powered section". Train proceeds on the Westbound track to station B.
> On reaching station B's block, a sensor begins the PWM rampdown to
> decelerate the train, and stop it at at that platform for some dwell. Chime.
> Accelerate train, travel until cleared of station B block onto the
> continuous voltage section... and into terminus at Station C.
We never played with speeing up the trains via RCX - we just did an on/off
switch... from Off to Full power.
> Here, the train would stop, dwell, chime... then leave. Spring switches? Can
> that be done with 9V? I'm hoping so... because that'll simplify the
> direction change sequence.
It is possible in some situations... Just pay attention to short circuits.
> So I guess I need... jeez, 8 of those clips that go from the 9V connector to
> the rails. Are those available separately as a S@H item?
Only way I know of getting them, without a full train set is via
http://guide.lugnet.com/set/4548
but you end up with a bunch of controllers... perhaps dacta sells some?
--
Dan Boger / dan@peeron.com / www.peeron.com / ICQ: 1130750
<set:8832_1>: Roadster (LEGO/TECHNIC), '88, 85 pcs
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Message has 3 Replies:
Message is in Reply To:
 | | Automated RT - Acceleration with RCX
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| Hello, I don't have any 9V trains; but I'll probably be geting the 4561 (Blue Express Railway) for either Birthday or Christmas (December birthdays suck!). Anyway, I'm really fascinated with ATO and subway/metro/rt technology... I've come up with a (...) (24 years ago, 2-Dec-00, to lugnet.trains)
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