Re: Two Fixed Polarities Confusing AR Units


emrldsky
 

Answers are imbedded plus comments after.

Mike,
What happens when a loco rolls from the south main line into reversing
section A-R #1? Note that that the polarity of the south main line is the
same as that of the south turnout you are calling "A". - The loco stops, the
AR unit shuts down.


Are you sure a loco can traverse all the way around loop #3 and pass through
the North-most turnout in both directions?

It does if AR-1 is not connected. If AR-1 is connected the loco stops
crossing the gap on either the main or diverging route and the AR unit shuts
down. This happens going either direction.

Can a loco from "B" successfully take the North-East route around A-R #3 to
A-R loop #2?

It does if AR-1 is not connected. If AR-1 is connected the loco stops
crossing the gap on the main route and the AR unit shuts down. This happens
going either direction.


If you disconnect the output of A-R unit #3 from loop #3 tracks and power
only tracks of A-R #1 from it, does the problem still occur at A-R #1? (this
should be the same as having a separate AR unit for the wye tracks of A-R#1,
except that loop 3 is dead) - Yes, same problem
DonV



Note: The fixed polarity section on the east side, the north west corner,
and the reference polarity for the AR-3/1 unit is B.

Thanks,

Mike G.

-----Original Message-----
From: WiringForDCC@yahoogroups.com <mailto:WiringForDCC%40yahoogroups.com>
[mailto:WiringForDCC@yahoogroups.com <mailto:WiringForDCC%40yahoogroups.com>
] On Behalf Of emrldsky
Sent: Wednesday, November 24, 2010 11:31 AM
To: WiringForDCC@yahoogroups.com <mailto:WiringForDCC%40yahoogroups.com>
Subject: [WiringForDCC] Two Fixed Polarities Confusing AR Units

I do not know what better title to use.
If you want to refer to a diagram, see the file "One Solution.pdf", located
in http://groups.yahoo.com/group/WiringForDCC/files/ReverseLoops/.
<http://groups.yahoo.com/group/WiringForDCC/files/ReverseLoops/>
The Southwest turnout and its lead track is of fixed polarity, call it "A".
Then comes AR-1. AR-1 is driven from the same AR unit that controls AR-3.
The track in line is between AR-1 and AR-3 and has fixed polarity "B". The
reference fixed polarity for the AR unit is "B".
When a loco approaches AR-1 from the Southwest turnout, the AR unit shuts
down. The turnout has all power routing removed. The layout passes the
quarter test. When I test the AR-3 polarity changing by shorting the track,
it works fine. When I test the entrance to AR-1 from the Southwest turnout,
it shuts down.
Could this be caused by the AR unit somehow being confused by the fixed
polarity A adjacent to the AR-1, track wise? I ask this because when the
loco enters or exits the AR-3, there is only the one fixed polarity, B, to
deal with. It is also the reference polarity for the AR unit.
The AR unit is a PSX-AR.

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