Wiring a crossover for DCC

Discussion in 'DCC & Electronics' started by DWP, Jan 19, 2005.

  1. DWP

    DWP Member

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    Need some help here. I am hand laying the track for my narrowgauge layout. At several areas I will have a crossover. I would like to have power
    to all points where the rails meet. I think thats the term.
    Now the fun part, I want to runs the trains without having to throw a switch every time. Thinking along the line of a auto reversing unit to check the polarity?
    thank you
    Dave
  2. Gary Pfeil

    Gary Pfeil Active Member

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    Hi Dave, are you talking about crossovers between two parallel tracks? There would be no polarity problems as long as both "north rails" of the two tracks are wired to the same DCC bus wire. Or are you talking about a crossing of two routes?
  3. DWP

    DWP Member

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    If I can get the terms right. I'm talking about track "A" crossing over track
    "B". Like an X??
    Looking at a template from Fast Tracks there are two opposite points
    that are isolated from the rest of the rails. As train on track "A" passes
    over track "B" I need a way to change polarity.
    Hope this makes sense.
    Dave
  4. Gary Pfeil

    Gary Pfeil Active Member

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    Yes Dave, it makes sense. I'm at work now and can't post a drawing, which would be worth a thousand words. I will try to do so from home later. Basically you have four spots where the rails intersect. As you stated above, only two of these bring rails of opposite polarity together. What I do is use styrene strip the width of the rail to create the point where the two rails come together. It can be filed with to the shape of the rail web. The two rails butt up to it. It provides a gap which won't be spanned by the wheel threads. And is so short it doesn't present a problem for electrical pickup. Then the four rails which form the diamond have feeders soldered and are laid. Instead of using solder for the frogs I use epoxy. I use the solid kind you mix together in your hands. It can be filed for the flangeways. This method eliminates having polarity problems at the cost of an insulated section which is wider than the flangeway by the width of a rail. Let me know if this makes sense to you.
  5. DWP

    DWP Member

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    Gary
    Thanks That is something I didn't think of. Another idea I had is to wire it to the turnout as the train will only use the crossover when the turnout is thrown. This is a back woods narrow gauge, so some "duck tape engineering" would of been used.
    Dave
  6. Gary Pfeil

    Gary Pfeil Active Member

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