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James90012

Electrofrog Point Peco Surface Motor Polarity

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Hello all

 

I think I've bitten off more than I can chew. I have an electrofrog point which I'm looking to power with a Peco surface point motor.

 

I've modified the point as per DCC electrofrog instructions and used insulfrog joiners, and then wired to a BUS.

 

I've then wired in a relay (GM 500) to change the frog polarity with a switch etc. 

 

However I've got a strange problem, when I run a loco I get a short but only when a loco runs on one of the routes set and hits the point V.

 

If I swap the wires around on the relay, the route that shorts switches.

 

Any thoughts or diagrams I can cross check the work against?

 

James

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Have you tried swapping the wire from the track bus over on the relay?

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Hi Ray - tried that but it just swaps the short to the other route. 

 

So if the blue wire is connected the train runs well with the point set straight. If I switch to the brown wire the curved route works well but the straight route now shorts.

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It sounds as though the relay isn't working. Have you got a test meter to check it?

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Thanks Ray - your post got me thinking and I've managed to fix it.

 

My wiring from the CDU to the relay was wrong, I swapped the positive and negative and hurrah it works!

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Glad it's sorted.

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Update: worked temporarily now I'm back to square 1 and I have 2 points wired up the same way with the same problem.

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I notice there are two versions a GM500 and a GM500D - the latter is 'DCC friendly', not sure if that will make a difference for you.

 

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