Subject:
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Re: Point Motor Instructions
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Newsgroups:
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lugnet.trains
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Date:
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Fri, 8 Feb 2002 00:52:45 GMT
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Viewed:
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944 times
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In lugnet.trains, Ed McGlynn writes:
> In lugnet.org.ca.rtltoronto, Jeff Elliott writes:
> > Hi folks,
> >
> > I still occasionally get requests for information on my old automatic point
> > motor. Well, I've long since moved to a more compact and reliable model, and
> > after the rtlToronto Train3 show last weekend, I've decided to post the
> > instructions for the new model.
> >
> > http://www.brickshelf.com/cgi-bin/gallery.cgi?f=10867
> >
> > This arrangement continuously cycles from one direction to the other - it's up
> > to the operator to stop the motor when the desired position is reached.
> >
> > When run from a 6xAA battery box or train regulator, I've had no trouble with
> > this setup, even on sticky points.
> >
> > I usually use a polarity switch setup on a single train reg to run each loop,
> > siding, and point motor in any desired combination.
> >
> > Note - you'll have to build the mirror-image of the model if you wish to use
> > the other 'handedness' of point. Not a difficult proposition, I'll leave it as
> > an exercise to the student :)
> >
> > Jeff Elliott
>
> Jeff -
>
> That looks like a very tight and solid design. I've made some reciprocating
> designs for point motors, but they all had some slop built into the design
> that lead to some delay in the switching action. On the outside (I haven't
> built it yet) your design looks like there's really no significant delay in
> action. Do you have to plan ahead for the action as the train approaches
> the switch? It's great to be able to have a very quick response when you
> realize last minute that a collision's about to happen.
>
> The functionality from an full throttle 9v train regulator or 6AA battery
> box is important, and it sounds like you've test your design with that in
> mind. Sure beats setting reduced power settings and using 9v train
> regulator output, don't you think? Less wiring, no wrong power setting
> mistakes, available to others to do the swithcing at train shows, etc.
>
> Thanks - nice work!
> Ed
I built Jeff's motor design, and I can answer these questions now...
This design is really much better than most I've seen, as it passes many
benchmarks for low number of pieces, predictable motion, solid switching, and
remains integral after numerous cycles.
It handles a full power 9v battery box or train regulator, and reciprocates in
about 4 seconds. The response is as quick as you can get with that length of
throw on the switch, and hats off to Jeff! Winning mechanics in this one.
I'l probably try and dress it up slightly by hiding the motor endcap on the
side of the building, but it's pretty complete as is. I suggest others try
this one out.
Thanks, Jeff.
Ed
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Message is in Reply To:
 | | Re: Point Motor Instructions
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| (...) Jeff - That looks like a very tight and solid design. I've made some reciprocating designs for point motors, but they all had some slop built into the design that lead to some delay in the switching action. On the outside (I haven't built it (...) (22 years ago, 31-Jan-02, to lugnet.trains)
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