Ken
In my experience of NX real world systems, stopping and reversing would be two separate moves set up by the signal control system ( signalman ) so trying to work out which way the train sets off would not occur, he knows, he initiates it.
Setting off would be a new manoeuvre set up in NX. I don¡¯t understand why JMRI wrestles with solving a non prototypical situation.
Be pleased to have an explanation if I¡¯m missing something
Thank you
John Pearson
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On 4 Jun 2019, at 12:58, Ken Cameron <kcameron@...> wrote:
Maybe borrowing from the prototype might help. As I understand it, some
country's prototype railroads use optic sensors. Here a sensor spot is
really two sensors very close together. The result is that it knows which
direction (and speed) the train is passing. It then is doing an axle
counting to tell if a train has finished passing or not. So if 50 axles
passed into a block, it doesn't consider the block empty until 50 have left.
These might not be just optic sensors but what I read said it was a place on
the track to determine when the block was clear or not by doing the axle
counting.
The worst case to figure out is when a train stops over the sensor spot,
then the train goes into reverse. Give it some thought and you would see
getting it right every time is not simple.
-Ken Cameron, Member JMRI Dev Team
www.jmri.org
www.fingerlakeslivesteamers.org
www.cnymod.com
www.syracusemodelrr.org
