Euan Show full post »
Euan
Above a photo of the incline when I was building the layout - it is the one in the middle
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Euan
DSC_0052.jpg 
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Euan
third rail in on this photo
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AHJAY
Its getting to the point where more discussion has little value.

We think it is already quite clear that the problem is not...

1/ the decoders in general
2/ the trackwork or control system
3/ anything to do with couplers.

It can only be related to the specific decoders you bought (as exceptions tha tfailed) OR the King loco.

regards, Ahjay
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Euan
I guess so - I just find it so frustrating when I cant work out a problem!
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RAF96
Have you considered pulling the TTS decoder, installing a blanking plug and doing a motor stall current check on DC. You may find your loco hauling that amount of stock up your curved steep hill is taking the decoder to its limit. Note that the TTS decoder motor circuit is self protecting so it should not burn out unless the installation is over heat retentive.
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Euan
Hi RAF96 - could you explain all that in laymans terms? I understand the installation of the blanking plate but how do you carry out a motor stall current check in DC and what is it? Thanks!
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Euan
Also have just tested the loco again and it trips the current. Removed the decoder and everything on the layout is fine, therefore there is no protection within the decoder - it just failed. I should also add that when it failed (after about 30 minutes running) it was not on the incline but further round the layout and I was slowing it down (not that it was going particularly quickly - 15 out of 28 steps on the Procab controller) and just tripped out the layout. Exactly the same  as I had with my previous Charles II which strongly suggests a non loco related issue!

Must admit to being very frustrated as I cannot fathom what is going on - will just have to see if altering the layout (my incline  materials are arriving Monday) stops this problem occurring. Though, as you can see from Ahjay's extensive tests the TTS seems to be able to withstand excessive loading. So;
  • Either I have been mega unlucky with TTS decoders
  • or my layout design is a unique set of circumstances that make TTS decoders blow in a King Charles II loco pulling 4 coaches!!
  • alternatively, something else!

Blowed if I know!
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