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Offline ellim  
#1 Posted : 10 October 2025 07:09:35(UTC)
ellim

Sweden   
Joined: 03/10/2025(UTC)
Posts: 4
Location: Stockholms lan, Stockholm
Hi all
Have anyone tried to see how long distance
locos with buffer capasitor can bridge?
Offline JohnjeanB  
#2 Posted : 10 October 2025 10:48:57(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 3,653
Location: Paris, France
Hi Ellim
I think buffer capacitors can bridge a few centimeters so much so that they need to be limited so that they don't bypass a stop section or stop too late
See in page 7 of Märklin Buffer Capacitor the CVs to adjust https://static.maerklin....ccb897bad71634561299.pdf
Ideally the buffer should allow the loco to continue for 1 or 2 cm before behaving as if there was a stop section as in many layouts stop sections are approx 36 cm long.

Here is a video about installing buffer capacitor in a mSD3 or mLD3

Cheers
Jean
thanks 4 users liked this useful post by JohnjeanB
Offline ellim  
#3 Posted : 10 October 2025 11:40:57(UTC)
ellim

Sweden   
Joined: 03/10/2025(UTC)
Posts: 4
Location: Stockholms lan, Stockholm
Thanks John for your answer
I dident even think about stop sections
But what can make a track be powerless for so short distance?
Offline 1borna  
#4 Posted : 10 October 2025 20:42:28(UTC)
1borna

Croatia   
Joined: 21/12/2012(UTC)
Posts: 1,539
Location: Hrvatska
Enough to prevent the locomotive from stalling due to poor contact on a dirty section of track or when crossing a switch.
thanks 3 users liked this useful post by 1borna
Offline xxup  
#5 Posted : 11 October 2025 03:29:58(UTC)
xxup

Australia   
Joined: 15/03/2003(UTC)
Posts: 9,645
Location: Australia
I had never thought about buffer capacitors and modern model railway software. Normally, when I calibrate a loco the braking effect has to be turned off as the software itself controls the rate of acceleration and braking. This way the software is able to bring the loco into a station within millimetres of the expected stop. I think that the difference here is that there needs to be an actual power loss to trigger the buffer capacitor, but in digital control the power is constantly on, even when the loco is stopped, which means that it should not "activate" the buffer capacitor.

Stop sections that actually take away the power are a very different story - fortunately, I don't (or didn't) use them on my layout.
Adrian
UserPostedImage
Australia flag by abFlags.com
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Offline bygger01  
#6 Posted : 11 October 2025 09:43:47(UTC)
bygger01

Denmark   
Joined: 23/11/2008(UTC)
Posts: 234
Location: Herning in Denmark
I have a couple of locomotives with an Esu buffer, here you could set the power (how long the locomotive can run).

Don't ask how, because it happened in a shop!

But it was at a minimum, because I didn't want to have problems in my brake modules.

Best regards
Jørgen St. from Herning in DK
H0 / Märklin K track / CS3+ / full digital / Epoke III +/-
Offline Copenhagen  
#7 Posted : 11 October 2025 10:58:28(UTC)
Copenhagen


Joined: 23/04/2019(UTC)
Posts: 509
Location: Copenhagen, Denmark
For the ESU loksound 5 decoder with power pack the manual says that the time for the power to be active can be set with the value from 0-255. Each increment giving a time of 0.032768 seconds. So 255 would give a bit more than 8 seconds of run time (in theory at least). The factory preset is a value of 127 (4 seconds).
thanks 1 user liked this useful post by Copenhagen
Online Kiko  
#8 Posted : 14 October 2025 06:01:53(UTC)
Kiko

Canada   
Joined: 13/02/2017(UTC)
Posts: 173
Location: Ottawa, ON
Hello All,

I have lots of Marklin locos converted to LokSound 5 decoders running DCC. All these locos have the ESU buffer capacitors installed. I set mine to 2 sec. and have no problems running trains on the layout with software control (Train Controller). Locos always stop withing a few milimeters of where they should (note: all locos are calibrated).

Just my 2 cents worth...

Cheers,
Andry
Andry
// Marklin HO K track; ECoS; TrainController Gold; Marklin & ESU decoders; Arduino controlled Switches, Semaphores & Accessories (DCC); Win 11 //
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