Automated Train Switch

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This topic contains 7 replies, has 3 voices, and was last updated by Profile photo of Greg Schubert Greg Schubert 3 weeks, 2 days ago.

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  • #22446
    Profile photo of Sean Collins
    Sean Collins
    Participant

    So I’ve been thinking a lot about this automatic train switcher since we started talking about it because of the winter display thing. So now I want to build it. My problem is i dont own a 9v train set. So my question.. would anyone be willing to work with me on this by supplying me (obviously more of a borrow thing) a 9v train set with at minimum of 4 track switches. In the mean time I’m going to start working on the layout, programming, and getting a 3rd nxt brick (since the 1st i had got from some one was broken -_- ). The other nxt brick is would handle train switching exclusively for up to 4 trains (maybe more if i do a binary system) but in the mean time the one working one i have will have to do. hahaha

    #22457
    Profile photo of Sean Collins
    Sean Collins
    Participant

    so this is what im came up with so far

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    #22461
    Profile photo of Tim
    Tim
    Participant

    As a practical matter, one usually wants to avoid having a turn out immediately after a curve. The trains (at least 9-v) tend to bind up and have difficulty maintaining momentum. It usually is a good idea to have at least 2 pieces of straight track after the curve before another curve or turnout.

    #22463
    Profile photo of Sean Collins
    Sean Collins
    Participant

    The layout is really just concept as im unfamiliar with the Lego train system 9 volt 12 volt battery operated any of them

    #22468
    Profile photo of Greg Schubert
    Greg Schubert
    Participant

    The layout of 9V track can be tricky, and I am sure there is lots of advice online about what to do and what not to do, ex.

    Track Layout Geometry

    I personally do not know for certain whether different sections of the track will be energized / de-energized by throwing the switches.

    Also, I cannot tell whether a particular configuration will result in a short circuit, even temporarily while the switches are being moved, if the pairs of switches (before and after each length of track) are not moved at precisely the same moment.

    I would seek out advice online from a LEGO train forum. Someone has probably solved many of these problems already.

    #22469
    Profile photo of Greg Schubert
    Greg Schubert
    Participant

    Here is an idea for a switching mechanism.

    Would you need a sensor to know when one train has come in for some down time so you could release a fresh train?

    #22470
    Profile photo of Sean Collins
    Sean Collins
    Participant

    Would you need a sensor to know when one train has come in for some down time so you could release a fresh train?

    In the program I account for a switch system to check when trains have docked. As soon as the current train laps 5 times the 6th time it triggers itll start the docking process. Each time the systems switches track the system will cut the power to the line and repower once the switch has been completed. The only issue i have is i dont own a 9v track to test and tweek the program on. As far as everything else I already own what i need for a working prototype.

    #22553
    Profile photo of Greg Schubert
    Greg Schubert
    Participant

    I am willing to try out the train switching stuff with you … next week, because I’m getting ready for / attending brickfair this week.

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