Sokratesz, on 05 June 2011 - 12:00 PM, said:
Please allow me to ask a few noobish questions regarding these huge layouts:
- How do you prevent it from gathering dust if you let it sit like this for months?
- Does it all run on one stock power supply?
You can if you want to (I tried out my blue 12V power supply, it has no problems with three 12V train motors. I'm sure the same goes for the gray one too).
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- I always get problems on large tracks with the trains running slower if they get further away from the power connection piece - easy to solve with multiple leads, obviously, but how do you do this?
For a large track, you need a multimeter to check for bad connections. If you have a 100 track piece 12V loop, there should be litte slowdown *IF* all connections are good. For a 150 track piece loop, I use only 2 leads (that's for 12V track, for a 150 track length 9V track I would use 4 leads).
For your 100 track piece loop, you have a total of 200 connections (2 per midrail). If even one of them is bad, you can have a pretty big slowdown on the track. A multimeter is very helpful to find it. When you insert one midrail into the next one, sometimes you feel no friction on one side, that is potentially a bad connection. If you give the female connector side a bit of a squeeze, then insert the next midrail, if you feel some friction (on both sides) when you put it in, then you know you'll have a good connection again.
If you have a relatively small loop, and if you have a bad connection in one spot, then the electricity can simply go around the other way, and the train runs fine. But if you have a long loop, then the electrical path (to go around the other way) becomes too long, so that one bad connection leads to a big slowdown (i.e. voltage drop) in certain parts of the track. So for a large loop, all your connections (two per midrail) need to be good (either that, or you have to add more leads).
How long is your loop? If it's less than 100, and if you see slowdowns, then all you have to do is to find and fix the bad connection.
For longer loops, I don't use the lego connectors to connect to the track. I just connect the wires straight to the midrails (you can connect them at the bottom, you can bend open those clips, insert a wire, and bend them closed again). This way it's easy to have as many leads as you want. I use 20AWG wires (has a little bit less resistance than lego wires, so you can cover some distance without losing much volts).
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- What's the best way to clean rust and dirt off of the midrails?
Go to a hobby store and buy some track cleaner. Helps a lot. Don't worry about rust, or other visible imperfections. Those things don't matter. It's the dirt that you can't see, that's what's blocking your electricity. Put some track cleaner on a cloth and clean it. Keep cleaning it until you see no more dirt coming off (for some reason I don't understand, you can see the dirt when it's on the cloth, but you can't see it when it was still on the track).