tstage richhotrain tstage Hmmmmm...Is there a reversing loop somewhere on the layout??? That might explain the sudden change in direction... Tom Why would a reversing loop cause the loco to change direction? It's as if CV29 is being activated somehow. Seems like a problem with the MRC Prodigy system. Rich Rich, My thought was that perhaps a temporary short inside the tunnel with the longer locomotives might fool the reversing loop detector to think that it needed to suddenly switch polarity, which is what it does. Granted, a stab in the dark (tunnel) but... Tom
richhotrain tstage Hmmmmm...Is there a reversing loop somewhere on the layout??? That might explain the sudden change in direction... Tom Why would a reversing loop cause the loco to change direction? It's as if CV29 is being activated somehow. Seems like a problem with the MRC Prodigy system. Rich
tstage Hmmmmm...Is there a reversing loop somewhere on the layout??? That might explain the sudden change in direction... Tom
Hmmmmm...Is there a reversing loop somewhere on the layout??? That might explain the sudden change in direction...
Tom
Why would a reversing loop cause the loco to change direction?
It's as if CV29 is being activated somehow.
Seems like a problem with the MRC Prodigy system.
Rich
Rich,
My thought was that perhaps a temporary short inside the tunnel with the longer locomotives might fool the reversing loop detector to think that it needed to suddenly switch polarity, which is what it does. Granted, a stab in the dark (tunnel) but...
Alton Junction
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
Overmod Did he not say 'wireless'? That has me thinking 'multipath' as a first knee-jerk response. I don't know enough to substantiate how that would cause the actual issue, though. Is this in fact happening with DCC data received via the rails? And if not, is there a way to test the track and locomotives using wired DCC data transmission temporarily, to confirm it is a 'logic' issue?
Did he not say 'wireless'? That has me thinking 'multipath' as a first knee-jerk response. I don't know enough to substantiate how that would cause the actual issue, though.
Is this in fact happening with DCC data received via the rails? And if not, is there a way to test the track and locomotives using wired DCC data transmission temporarily, to confirm it is a 'logic' issue?
On my NCE PH-Pro 5 amp wireless system, I also have cables to tether the throttles to ports along the layout. If the OP has a similar arrangement with his MRC Prodigy Wireless system, it would be worth a try to tether the throttle and see if the results are different.
Since the strange behavior occurs inside the tunnel, there may be signal interference, causing the loco to reverse itself due to erratic CV changes.
What about the plug to the tender
Could be loose or the Radis on the curve causing something weird in the connection
can any dcc locos go thru the tunnel without a problem?
greg - Philadelphia & Reading / Reading
What is really weird is the fact that the loco reverses direction in DCC. If feeders were crossed, you would have a dead short in DCC, not a reversal of direction. Something else is going on here. Is the track in the tunnel simply a straight run? Any turnouts?
Probably doesnt. Didnt read very well.
A bit more info would help. Have the locomotives with the problem ever worked OK in the area of the problem? Is the Prodigy System new? Are the locomotives new. Has the Prodigy had problem before this problem.More history of your DCC operations will help. Mel My Model Railroad http://melvineperry.blogspot.com/ Bakersfield, California I'm beginning to realize that aging is not for wimps.
CGW103Sounds like you have the track wires reversed in the tunnel.
How does that explain that sometimes it works normally and sometimes it doesn't? The layout ought to be shorted from the get go.
That said, I don't have a clue as to what would explain it. Randy to the White Courtesy Phone.
Henry
COB Potomac & Northern
Shenandoah Valley
Sounds like you have the track wires reversed in the tunnel.