LGB Fully automated alternating station circuit wiring

curtis

curtis

Registered
27 Nov 2018
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Germany
Diodes arrived today in the post. Your recommendation worked a charm!

Ended up setting the entire length for the stations to had the voltage dropper so even passing through trains will slow down.

Thanks for the help, Greg. Much more pleasing to the eye (and in some part to the motors, I guess!)
 
J

john493

Registered
19 Jul 2014
18
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somewhere
A long while ago I built a simple garden layout like this. There were three sidings, and two trains. One train would leave its siding, make a complete loop via the empty middle siding, then return to its own. Then the other would do the same, in the opposite direction. It was all done (pre DCC) with regular MPL turnouts and sensors. There was one LGB "relay" (just a point motor with the switch block, not attached to a point) that controlled direction. I could try to reproduce the wiring if anyone is interested.
 
dunnyrail

dunnyrail

DOGS, Garden Railways, Steam Trains, Jive Dancing,
25 Oct 2009
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St.Neots Cambridgeshire UK
A long while ago I built a simple garden layout like this. There were three sidings, and two trains. One train would leave its siding, make a complete loop via the empty middle siding, then return to its own. Then the other would do the same, in the opposite direction. It was all done (pre DCC) with regular MPL turnouts and sensors. There was one LGB "relay" (just a point motor with the switch block, not attached to a point) that controlled direction. I could try to reproduce the wiring if anyone is interested.
Yes please, tried something some time back with EPL, managed to get 3 trains working with Station stops ok but never managed to understand how I could relate it to a reverse and change passing loop situation.
 
J

john493

Registered
19 Jul 2014
18
1
somewhere
I used a separate, stand-alone relay (not attached to points) for track direction. Apart from that, everything was done by contacts attached to the relays of the 4 points involved, which in turn were operated by LGB magnetic train detectors.
 
dunnyrail

dunnyrail

DOGS, Garden Railways, Steam Trains, Jive Dancing,
25 Oct 2009
16,857
1,523
72
St.Neots Cambridgeshire UK
I used a separate, stand-alone relay (not attached to points) for track direction. Apart from that, everything was done by contacts attached to the relays of the 4 points involved, which in turn were operated by LGB magnetic train detectors.
Understand that I think, I assume that an LGB Switch attachment can be used as a relay to change the polarity. My mind had difficulty working out where the track contact would be to throw it and how it would be disabled (latched) till required again to reverse the polarity. I feel that location location location will be relevent for the actuator?
 
J

john493

Registered
19 Jul 2014
18
1
somewhere
Thinking about it some more, with just two trains and a simple loop, it's very easy, and you only need two detectors, one at the entrance to the isolated section at the departure end of each of the two sidings. Each train flips both points for the other train to run. You attach contacts to one of the points that reverse the polarity to the whole layout, and feed the isolated sections via diodes so they are only fed when the polarity is right for the train.
 
dunnyrail

dunnyrail

DOGS, Garden Railways, Steam Trains, Jive Dancing,
25 Oct 2009
16,857
1,523
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St.Neots Cambridgeshire UK
The one that I saw in depesh had 2 loops and 3 trains so a little trickier, but perhaps the diodes are part of the solution. But certainly each of the bits between the loops needs a reversal with 2 trains going one way and the other the other way. Said twas not easy! My vid in an earlier post shows the layout only all the trains going the same way, want one to go the other way.