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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
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Message has 1 Reply:
Message is in Reply To:
 | | Re: LEGO 7996 and 9V
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| (...) 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 (...) (17 years ago, 9-Mar-08, to lugnet.trains)
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