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0-6-0 locos stalling on points


annagr

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96RAF, have you not noticed that you have quote replied to a 3 & 3/4 year old post resurrected by Ian.

 

 

I am always being tripped up by these old posts. We have tried to get an auto-age lock on them but to no avail and trawling for and manually locking old posts is a no-no job.

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Even though it is an old topic, there is some useful info within. I think Mr Lambert's contribution was under appreciated, I used his website for reference quite a bit early on. Make sure it isn't a short cutting the power rather than a stall.


Identifying the actual problem makes solving it potentially much easier. To that end, even a simple, cheap, auto-ranging multimeter is a very useful tool. An audible continuity tester is an essential function on one.


With the track power off, having a prod around with a multimeter can be quite revealing. If you hold one lead against a known working bit of rail and move the other over the point and all of the rails that should be live you will identify a dead-spot if there is one. It can happen if the contact between the switch rail and the stock rail becomes dirty for example.


On the Hornby and Peco points choice, I will say that Hornby points have a bigger dead spot at the "frog" which is better for older stock with course wheels that can short across the frog on the Peco points. This is more of a problem if you use point clips or feed power from all three ends of the point. The both have their pros and cons.

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Good summary Barry, and no undervaluing of Brian Lambert (Flashbang) here, one of my most used sources (confirmed in General forum stickies).

But one piece of advice missing - ensure your points are dead flat using a straight edge. Pinning in the middle most often is the solution, or filing the tops of frogs if sitting proud.

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... course wheels that can short across the frog on the Peco points. This is more of a problem if you use point clips or feed power from all three ends of the point. The both have their pros and cons.

 

 

This is why I would always advise against "back-feeding" power into the frog end of any point - even dead frog types. I've seen similar issues with wheels bridging and shorting at the frog in other scales (N and G for example).

I treat all points the same as Peco Electrofrog: power only ever fed in from the toe end (blades end) of a formation of points, and isolating joiners on any frog V rails which have a power feed further along.

 

 

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  • 4 weeks later...

The thing I have noticed is the difference in "stay alives" and the relationship with the decoder. I found using the same LaisDCC "stay alive" on a Zimo and a Train O Matic decoder on the same 0-6-0 loco, the loco ran longer on the Zimo decoder. I must admit I was surprised

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