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Question about technical stuff
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 Posted: Thu Apr 11th, 2013 07:27 pm
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robert_serveiss
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I'm trying to design a layout that will have one train going one way and having a second train coming from the other in like a cross track piece. My question is how or what do I need so one train will stop or slow down until the other train passes? Any help would be greatly appreciated. Thank you

Robert



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 Posted: Fri Apr 12th, 2013 02:26 am
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NathanO
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What scale are you working in? How big is the layout? How much knowledge of electronics do you have? Would you be willing to have a computer hooked up to the layout? What is your budget?

There are many options. In the 1960's my Dad and I did a layout that used relays to do the job. Today you can use a variety of items to do it, some external to the locomotives, some internal.

Nathan

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 Posted: Fri Apr 12th, 2013 03:30 am
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robert_serveiss
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the scales are g, o, ho and n scales we'd like to do this with. haven't started building the layout only working on the design of it. some electronic knowledge. and no computer hookup just looking at options on how to have one train going in one direction and stopping to let another train coming from the opposite direction to pass to a different part of track.



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 Posted: Fri Apr 12th, 2013 03:54 am
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robert_serveiss
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we also want to add an rc race track to the layout with the train and car track are together so we will need the cars to stop at the crossed section.



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 Posted: Fri Apr 12th, 2013 04:05 am
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robert_serveiss
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ooops forgot to mention adding a disney monorail to this concept and layout



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 Posted: Fri Apr 12th, 2013 10:28 am
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Tramcar Trev
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You would be wise to also include a street tramway and a funicular railway. Also Trolley busses guided using the Faller System would look super...



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 Posted: Fri Apr 12th, 2013 02:14 pm
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W C Greene
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Goodness, I don't know how many square feet you have available for all that you want but it could be a case of wanting far, far more than is possible to properly build into a layout.
Just a question...how large is the space you are considering for this layout? I have seen it many times, a 4 by 8 foot layout and the builder wants NYC, the Rocky Mountains, Niagra Falls, Grand Canyon, and San Francisco...and three railroads to serve it all. I don't mean to be flip about this but it really sounds like you are wanting more than can be built, even in a vary small scale. My advice is keep it simple, very simple.

Respecfully posted,
Woodie



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 Posted: Fri Apr 12th, 2013 04:06 pm
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NathanO
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There are two versions of what can happen. The top part of the first drawing shows both trains going the same direction and the bottom has them going in opposite directions. From the 'control' point of view they both are the same.


You have several choices of how to 'detect' a train when it is in an area. Each has it's good points. Optical detectors, ultrasonic sound detectors, and track current detectors are some of the ways to do the job.

Lets look at track power and 'block detectors' that work off the current draw of the train, the second drawing. You have to make sure the train draws current when ANY part of the train is still in a block. Keep the train length so that the whole train fits in the block. If it is a freight train then add lighting to the caboose. If it is a passenger train have lighting in the cars.


Blocks 2 and 3 of both lines need detectors as a minimum. The first train into its block 2 triggers the 'stop' of the second train when it gets to its block 2. The second train stays stopped until the first train clears its block 3. The 'turn off' of a block can be done with a relay.

If you use some sort of 'command control' system, DCC, DSC [ from MTH] or any of the other track based control systems the detector would cause a 'stop command' to be sent to the train. Once the the track ahead is clear the 'resume command' would be sent. The same type of commands could be sent if you are using an RC [ radio control] type of system.

The same 'blocks' would be set up for the RC Race Track. Detection for that needs to be looked at depending on how the cars / trucks are controlled. The monorail could be detected the same way the trains are detected.

I would recommend that you start with a simple setup of one scale and play until you feel that the system is working the way you want.

Cost will depend on how fancy you want to get. The simple relay control could be done for about $50 or less per crossing but could be the hardest to setup and keep going. All the other ways the costs will vary with the scale and if you want to use the same 'system' for all of them.

A medium priced DCC system to run all three scales, N, HO and O, with the detectors, decoders for the locomotives, and block detectors would probably run about $800. One could also add block signals and crossing gates to this at any time. The start of this system for HO scale would be under $400.

Nathan

Last edited on Fri Apr 12th, 2013 04:06 pm by NathanO

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 Posted: Fri Apr 12th, 2013 07:05 pm
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robert_serveiss
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thank you so very much on the information



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 Posted: Fri Apr 12th, 2013 09:03 pm
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robert_serveiss
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This is basically what I want to accomplish.




There will be another track setup exactly like it at the other end of the layout.



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