LNERGE
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Everything posted by LNERGE
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It has taken a lot of effort to get mine to run satisfactorily, way beyond what I would say is reasonable for a new model. I think I am there with it now. The real test will come later. My 8 year old lad wants to use it for some shunting.
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It’s a Heljan class 14 with a 21 pin decoder. I’ve tried an MX638D, DCC Concepts and AE decoders. All produce the same results
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I’ve tried several decoders. One headcode panel is alight all the time. The head and tail lamps are fed via the decoder/stay alive. The headcode panel goes out if track power is lost. Any ideas what’s up?
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Mr Quick on the uptake here noticed my D9545 was looking rather clean about ten minutes before the Hattons email arrived.
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COVHOPs/BRT Whisky Grain Hoppers: how were they filled?
LNERGE replied to GraemeWatson's topic in UK Prototype Questions
I have one of these.. https://scalescenes.com/product/t037-low-relief-grain-silo/ I think it came in a Hornby Magazine? Very much like the grain facility at Sandy. sort of.. Edit to add… and this is simply perfect… https://www.shapeways.com/product/K8GPY2Q2V/4mm-british-rail-shunting-tractor -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
It should be a cleaner more efficient magnetic circuit. They look and sound damn good. -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
Did the yolk across the coils etc make a difference? -
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Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
Relay contacts are made from silver and silver impregnated carbon so they are near impossible to weld under fault conditions. Plunger contacts can be brass to brass as in the commutator in this token machine. The plunger contacts are brass to brass also but in this case a small disc of brass is riveted into a piece of spring steel. -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
A diode across the coils will delay the release of the armature. -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
Here’s the oddball relay.. I’m not suggesting you build one just posting for the fun of it.. This has three coils. Two are in series with the bell line between two signalboxes. The third coil is standing between the two coils and earth. When box A plunges the armature moves one way. When box B plunges it moves the other. One contact will operate a gong. The other a bell. When placed at an intermediate level crossing the keeper can determine the direction of the train from the bell codes etc. This one is going to be installed on a key token circuit over the winter. -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
That looks magnificent. I’ll try and post something oddball tomorrow that’ll get you thinking. A crazy day today trying to do stuff between trains. A bit calmer tomorrow I hope. -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
IRSE green book No6 is a good read. It’s quite detailed regarding magnetic circuits. Dead impressed with what you’ve done so far -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
You’ll find they are opposing each other. Reverse the polarity of one and all should be well. For UAX6 the bell and block together -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
There is a relay attached to the bell line to the adjacent box. This relay operates the bell. Not required in your case I suspect. The residual gap in your picture looks good. -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
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Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
Have a look at this. Better than my ramblings.. The diagrams show the lines of force etc. http://www.samhallas.co.uk/repository/edu_pamphlets/ep_technical_electricity_1_1.pdf -
Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
This will complete a magnetic circuit linking both coils. You will need to make sure your armature is not capable to touching the iron cores or it will latch up and stay put regardless of current flowing etc. A residual pin is made from brass or copper in the end of each core stopping the armature touching the iron cores directly is essential. I hope to take some photos tomorrow but it is going to be a busy day. -
I wonder what damage was done..
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Home made block bells
LNERGE replied to ikcdab's topic in Permanent Way, Signalling & Infrastructure
It looks like you have made two coils that are simply acting as electro magnets to attract the armature. I'm in no doubt this will work but some effifiency may be gained by placing a steel yolk between the two cores at the oposite end to the moving armature. You may need to reverse the way the current flows through one of the coils if you try this. There are various adjustments of differing styles available. I can post some pictures if required. -
Thank you for the reply. I’m impressed with the stay alive.
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Has anyone tried the asymetric brake on these? There is mention that cv27 is decoder automatic stopping. No other mention anywhere else though?