• Welcome to AnyRail Model Railroad Forum. Please login or sign up.
September 18, 2021, 04:15:38 pm


Due to heavy spamming attempts on this forum, automatic registration has been disabled. We will approve registration requests as quickly as possible (unless you're a spammer of course :) )

Short Circuits on my Kato n gauge layout

Started by drbob01, September 15, 2021, 12:32:45 am

Previous topic - Next topic


I have designed a layout I really like on my 3 1/2 by 9 foot table, but after install it, with 12 turnouts, I continually get shorts when running a loco or if switching a turnout.  I know there needs to be some insulators placed but I cannot figure out how to get this done...I know there is a reversing loop but hoping it could work with properly placed insulators, etc.  Really need help to get this done... Any help would be GREATLY appreciated!
( I cannot upload pdf, etc, since the directory for upload is full...please let me know when it's available...thanks!


You should be able to upload your plan or a pdf as an attachment to your post.

If you have a return loop, you need to have a way to switch the polarity in the loop.
So you need to create a section in it that's fully isolated, so both rails, at either end.

Next, you need to make sure that when a train enters this section, the rails at the isolation have the same polarity as the wheels go over it.

Once the train is fully in the section, you need to switch the polarity of the section to ensure it matches the rails at the exit of the section.

You also may need to swap the train direction if the driving direction depends on the polarity. For DCC this is not needed as the direction is in the decoder.

The whole process can be automated. There are several commercial solutions that either depend on incoming train detection or quickly reversing polarity when a short is detected.
David Hoogvorst. Founder and Owner of DRail Software. Creator of AnyRail.