LGB 65000 sound unit control

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Gorsebank

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To pause my MTS controlled loco,s I apply DC voltage to a short track section and the engine comes to a smooth stop and accelerates back to normal speed once the normal DCC supply is returned, this works fine. But the sound generated by the engines 65000 sound unit does not change as the loco slowest to a stop.

Is there a CV in the sound unit that can be changed to cause the engine sound to slow to a stop when DC is applied to the rails ?

Ian at the Lighthouse, Gorsebank and Bride Railway on the Isle of Mann
 
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The way I read it.. The OP wants the 'chuffs' to slow, when the loco slows on DC??
 
My guess would be you would need to use a 'chuff sensor'.. Not sure if the 'clock' connector would allow this?
 
You could try setting the "Starting Voltage Analogue" CV58 to a value that causes the sound unit to think it is stopped when it sees the DC voltage you are using to control the automated stop.

CV59 "Max Speed Analogue" is another one you could tinker with.


The "Clock" inputs are for a wheel sensor as Phil mentions, CV64 controls its use (cant remember the required values though).
 
Running a DC and a DCC supply to the track, even an isolated section is asking for big trouble. Your DCC station is a serious risk of going pop. I dont understand why you cant slow the loco under DCC
 
stockers said:
Running a DC and a DCC supply to the track, even an isolated section is asking for big trouble. Your DCC station is a serious risk of going pop. I dont understand why you cant slow the loco under DCC
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'Brake on DC' is a 'known unknown' ;) A fairly commonly supported feature. Both decoders and CS should cope with this without harm..
YMMV.
 
Agreed PhilP PhilP . think expecting the 65000 sound module to support brake on DC is a bit optimistic. I'm not sure tinkering with any of the motor decoder CVs is going to change that unfortunately.
 
I am sure that the 6500x does not know about Brake on DC, however as I do not have one here to play with, I am also not sure on its behaviour when the DCC signal is lost and replaced by an analogue one.

My assumption is that upon seeing the DC signal it will provide sounds that are appropriate for that voltage, thus my suggestion to set the "Analogue Starting voltage" [in the 6500x and not the driving decoder] to a value that will make the sound module play the idle sounds.
 
I am confused. Are you guys suggesting that the train rolls along on digital and then runs on a bit of DC to slow down.?
 
stockers said:
I am confused. Are you guys suggesting that the train rolls along on digital and then runs on a bit of DC to slow down.?
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Yes.

A section of track (preferably longer than needed for a train to stop) is connected so that it can be switched from DCC to DC. When the train enters the section and is required to stop (i.e. at a signal) the section is switched from DCC to DC. The train slows to a stop. When the train is required to go again, the DC signal is removed and the DCC reapplied.
 
New one on me mark. But I am sure it says in the instructions not to connect more than one power supply, and i have heard of people blowing central stations by also feeding DC.
 
stockers said:
New one on me mark. But I am sure it says in the instructions not to connect more than one power supply, and i have heard of people blowing central stations by also feeding DC.
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Quite often the 'DC' is supplied by a single diode from the DCC section to the DC section.. Half-wave rectified, but good enough..
 
I understand that idea Phil, that'll work - but two feeds - eek!
 
stockers said:
I understand that idea Phil, that'll work - but two feeds - eek!
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Well, to get technical, the CS output should be floating.. Does not matter what DC potential is on one leg.. The decoder should also be looking for a balanced signal, again it should not matter if there is a DC component present. :nerd:
 
stockers said:
I understand that idea Phil, that'll work - but two feeds - eek!
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I guess the trick is to use a double-pole changeover switch, with the common connectors to the track side and the two switched options being the incoming feeds, so that there is no way that both power feeds can ever be fed to the same piece of track at the same time (and equally, no way that the two power sources can ever be accidentally connected together).....

You would have to ensure that the switch was of a break-before-make design, otherwise you could get just a momentary cross-connection when the switch was thrown.

Jon.
 
Zerogee said:
I guess the trick is to use a double-pole changeover switch, with the common connectors to the track side and the two switched options being the incoming feeds, so that there is no way that both power feeds can ever be fed to the same piece of track at the same time (and equally, no way that the two power sources can ever be accidentally connected together).....

You would have to ensure that the switch was of a break-before-make design, otherwise you could get just a momentary cross-connection when the switch was thrown.

Jon.
Click to expand...
and when the loco bridges the gap.
 
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