mts anolog blank off track reverse engine travel when in use

Must admit I'm trying to understand why there would be DCC sections and isolated analogue sections on the same layout? The only reason I can think of is the "Brake on DC" technique which some decoders support, but I'm not sure if this is very prevalent in large scale decoders? If this is indeed a use of Brake on DC then yes the polarity of the analogue sections needs to be swapped if the loco goes in the opposite direction when it crosses into such a section. It shouldn't cause a short as the DCC and analogue electrical circuits are separate.
 
Thanks for your info on this and I will try changing over the isolated track connections. The reason i run analogue and DCC together is because
i have a 50/50 mixture of both types of engines and also 3 gauge one engines analogue, and the cost of decoders for the analogue engines would be high
but it may have to come to that. I'm sorry for my use of non technical language and causing confusion but we live and learn.
 
I wonder if I am having a lightbulb moment here. Does Mike have two circuits one Analoge the other DCC with a Blanked off (Isolated) section to join them? If so as Gardenbahner and possiby ithers intimate the difference between the two would define possibly the way things are going due to the different conventions between wiring. So goes left to right on Analogue. Right to left on DCC?

Certainly running between the two should not be attempted as Gardenbahner says.
 
If the lightbulb moment is assumed, and that I have read the other posts correctly....

1) Non Decoder fitted loco is being run on MTS using the loco "0" (analogue) feature.
2) When running on normal Analogue power it moves in the expected direction (for example, forward if the controller is turned clockwise).
3) When same loco is run on the DCC track with Loco 0 selected and the controller turned in the same direction, the loco runs backwards.

If this is the case (and it is the case for all analogue locos) then the easiest solution would be to swap the DCC feed wires around. This will cause the power bias to swap and the effectively change the polarity of the voltage as seen by the analogue loco.
DCC locos will not be affected as "Go forward" means "go forward" regardless to orientation on the track.
 
dunnyrail said:
I wonder if I am having a lightbulb moment here. Does Mike have two circuits one Analoge the other DCC with a Blanked off (Isolated) section to join them? If so as Gardenbahner and possiby ithers intimate the difference between the two would define possibly the way things are going due to the different conventions between wiring. So goes left to right on Analogue. Right to left on DCC?

Certainly running between the two should not be attempted as Gardenbahner says.
Click to expand...
Thanks for extra info.I'm running this through the LGB central station mts system using LGB control boxes for switch points and isolated sections
these boxes which are yellow and orange plug into the the mts system,the system allows me to run 1 analogue engine at any time with the digital system
so i was hoping to isolate the analogue engine and thereby be able to run another analogue engine mainly when i'm running my gauge 1 engines.
i know I'm expecting a lot from my LGB 45mm track i may have to rethink my gauge 1 as it's these engines the reverse running problem arises.
Thanks everyone for your help in this problem.
 
mikeked said:
Thanks for extra info.I'm running this through the LGB central station mts system using LGB control boxes for switch points and isolated sections
these boxes which are yellow and orange plug into the the mts system,the system allows me to run 1 analogue engine at any time with the digital system
so i was hoping to isolate the analogue engine and thereby be able to run another analogue engine mainly when i'm running my gauge 1 engines.
i know I'm expecting a lot from my LGB 45mm track i may have to rethink my gauge 1 as it's these engines the reverse running problem arises.
Thanks everyone for your help in this problem.
Click to expand...
Aha understand so much better now. The concept of Isolating an Engine is sound even on DCC. I used to do it quite a bit when more than 1 Engine was on the line with the same Chip Number. I wond if you have the wires reverced on your Box. As I explained recently to Sarah DCC is so very different from analogue in that we do not have Pos and Neg, so you need to think of Outside and Inside Rails. once you have this concept then feeding the correct rail via your switch box should not be a problem if indeed that is the issu.
 
I'm pretty sure that the issue is down to the "Gauge 1" models being wired to the NMRA standard and the "G (or Large) Scale" ones to LGB's standard.

Three possible courses of action.

1/ Be aware of the situation, accept it and change nothing.

2/ Reverse the pickup wires on the "Gauge 1" models.

3/ As 2 but with the "G Scale" locos.

Before attempting 2 or 3 double check that the loco in question isn't fitted with a polarity reversal switch. Many MTH Gauge 1 locos have one as do a fair few Bachmann large scale examples.
 
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