Subject:
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Re: LEGO 7996 Crossover Motorized and Ballasted - Pictures
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Newsgroups:
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lugnet.trains
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Date:
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Tue, 8 Jul 2008 12:28:09 GMT
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Viewed:
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27475 times
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In lugnet.trains, Mark Bellis wrote:
> In lugnet.trains, Ondrew Hartigan wrote:
> > In lugnet.trains, Scott Wardlaw wrote:
> > > > The real broblem with the 7996, wether you metalize it or not is the linked
> > > > switch controls. My next project is to split the controlls and add solenoids for
> > >
> > > I wish that I had read this a few months ago (when I should have). I just
> > > bought a 7996 with the intention to convert it to 9V.
> > >
> > > I am very disapointed that you can not have both of the parallel straights
> > > switched to go straight at the same time. The switching only allows for one to
> > > be straight and the other must curve.
> > >
> > > I'd be happy to know if you have a good method of splitting the controls and
> > > adding solenoids!
> > >
> > > Does anyone else have experience with splitting the 7996 controls, or adding
> > > solenoids to a regular 9v switching point?
> > >
> > > Thanks,
> > > Scott
> >
> > splitting the controls for the doubble crossover can be done in a couple of
> > ways. as soon as i get my hands on a set i will write up some instructions for
> > everyone.
> >
> > as for selenoids there really is no need. automating 9v/rc switches is fairly
> > straight forward. see:
> > http://www.brickshelf.com/cgi-bin/gallery.cgi?f=109777&n=47 see photos that
> > start with a "z" also there are literaly probably 100+ solutions to automate
> > all you have to do is look.
> > ondrew
>
> I have altered the crossover controls to provide for an all-straight state by
> tweaking the springs in the switching rails.
>
> I have also motorized the crossover in such a way that it can be set straight,
> TL-BR or BL-TR with two switches (both pneumatic!).
>
> My solution needs just 8 plates below track level in order for there to be no
> obstructions above ground, so that larger rail vehicles (8+ wide and 8mm scale)
> can use the crossover without grounding or hitting the mechanism.
>
> I ballasted the crossover while I was at it, so that it fits with my layout
> ballast scheme.
>
> Pictures here: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=147934
> Instructions for building it:
> http://www.brickshelf.com/gallery/mbellis/Technic/Pneumatics/Pneumo-Switch-Points/crossover_info.txt
>
> Mark
> =============================================================================
> Mark J E Bellis 8mm scale LEGO trains
Mark:
Nice work! This solution looks really trick. Another great use for the
pneumatic system. I wish this stuff was still being produced (although I'm
interested to see how the rams work on the new excavator set). I also like you
ballast work, it looks really nice. A clean and compact solution.
-Dave
ToT-LUG
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