Hornby Select DCC Controller malfunctioning
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Have you contacted Hornby Support
http://www.hornby.com/support/ ? - it may even pay to join the Hornby Forum.
Ron
NCE DCC ; 00 scale UK outline.
NCE DCC ; 00 scale UK outline.
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It sounds very odd. I could come over on the weekend and have a peek if you like.
Cheers
Max
Port Elderley
Port Elderley
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:thumbs;-):cool:
web-cam 2.2.74.174:8081
if the lights are off no cam
if the lights are off no cam
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Max
Port Elderley
Port Elderley
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Ron
NCE DCC ; 00 scale UK outline.
NCE DCC ; 00 scale UK outline.
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Maybe I'm missing the point here, but I am a little puzzled. Why do you use switched 'dead sections'? I have always believed that the whole idea of DCC was that all the track was live all the time. You should be able to drive as many locos as you want onto one piece of track without needing to use any switched sections.
Is it possible that the switching of these sections is somehow causing an intermittent short somewhere? This could be enough to send the controller's processor into a bit of a flap. Is it even possible that the switches themselves are sending an electronic 'spike' that is confusing the controller?
Perry
Due to cutbacks, the light at the end of the tunnel has been switched off.
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It might be worth trying each section separately Neil to see if it's one particular switch/sequence/section causing the problem.
I have heard of people using dead sections with DCC to be able to "turn off" a loco (or a train). For example, if you have coach lighting - I have a rake of lit Pullmans - and you want to park it up - you can't turn the lights off unless you can kill the section. :roll: It looks odd sitting in a siding with all the lights on. You can't kill the lights on the Bachmann Derby Lightweight - at least I can't on mine ……… Also, I wonder if stationary locos draw any current ? Maybe you could get to the overload point with lots of locos just sitting there - I don't know - maybe they only draw current when on the move …………:roll:
'Petermac
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Perry
Due to cutbacks, the light at the end of the tunnel has been switched off.
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I think you are right with regards to the number of loco's that are actually running. I'm sure I read to allow up to an amp per loco and if you had lights and other functions, this may be more. You also have our old friend volts drop to contend with on top of that.
As far as stationery loco's go, I'm not sure but I thought they were ok as long as lights, sound, carriage lighting etc was switched off.
I hear what you are saying with regards to lighting Petermac. The carriage lighting I was reading about was retrofit which was wired to a decoder function which was controllable.
My understanding of stationery loco's sitting on the track is that a negligible amount of power has to be drawn as the decoder needs to be able to recognise the signal when called upon. This should be a tiny power draw I would think.
What are the dimensions of the layout. Mines is 10 feet by 12 and when buying the NCE system I opted for the 5 amp power supply as the standard 2 amp version would have been cutting it fine. I'm talking volts drop and deterioration of the signal over distance.
Cheers
Toto
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Toto, at one amp per loco. it would have to be a very old loco as modern motors draw under 200 milliamps ( with lights & sounds - it may stretch to 400 milliamps ) and voltage drop would only occur if the power bus cables are very light gauge .Hi,
I think you are right with regards to the number of loco's that are actually running. I'm sure I read to allow up to an amp per loco and if you had lights and other functions, this may be more. You also have our old friend volts drop to contend with on top of that.
Cheers
Toto
The exception is Heljan locos which can draw over 500 Milliamps so that is why the early decoders were burning out.
Last edit: by Sol
Ron
NCE DCC ; 00 scale UK outline.
NCE DCC ; 00 scale UK outline.
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Max
Port Elderley
Port Elderley
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Hi Max and everyone else that has tried to offer help to fix this problem - I have found out whats causing it and purely by accident. Turns out that one of the recently installed hornby curved points is not liking the fitment of the DCC Electro Power clips to it. With the points angled to allow the inner track to access the main line it was causing a short with the dcc clip installed. In the main straight ahead position there was no problem so I have removed both electro dcc clips from the curved point and "hey presto " everything works fine without the clips. I am still baffled as to why that point does not like the dcc clips installed as I have 3 other curved points and a heap of straight points all with clips installed and none have caused this malfunction to the Select Controller. Anyhow its fixed and when I get time I will disconnect the "rogue point" and check underneath to see if theres a fault in manufacture that could cause it to short when dcc electro clips are installed. Regards Neil
Neil, actually a track plan and which point is giving you grief would help clear this up.
The clips are designed for DCC as they bond stock rail to blade so that blade contact is not a problem.
The clips then feed power to both rails of the V all the time & dependant on what is on the other end of the V - both the main & branch lines may create a short circuit.
Ron
NCE DCC ; 00 scale UK outline.
NCE DCC ; 00 scale UK outline.
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Ah, now I geddit!!! :thumbsHi Perry - yes you are entirely right with the way dcc operates. My idea to introduce some dead sections was that when a loco was travelling around the mainline I could redirect it into a hidden fiddle yard and when it hits the dead section it would stop before popping out of the tunnel. I can leave it there for any amount of time and reconnect the power when I want it to reappear. Same with a dead section at the end of a station - the train will pull up in the right position and then when I want it to pull out of the station I throw the switch and off it goes. Dont know if this system makes sense or goes against the grain of Railway operation but to me it gives a"breather" to go an operate another loco whilst you have others stopped in various locations. Let me know your thoughts mate. Regards Neil
That's a very cunning plan.
The sudden stop in the hidden fiddle yard is fine, but I guess you approach the station stop fairly slowly - otherwise it will look like a full-on emergency stop!
As for "going against the grain of Railway operation", it's your railway, and you run it exactly how you want. I don't think anyone here would say otherwise.
:cheers
Perry
Due to cutbacks, the light at the end of the tunnel has been switched off.
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