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Easy - the directional arrow is from the viewpoint of the locomotive, not an external view of the train. There is no N/S/E/W - you, the engineer, are controlling the loco to go forward, or backward. IOW, direction is relative to the loco, not the layout.To really understand this, I guess you'll need to borrow the TRW shrink-ray so you can fit in the cab.
Whether you view this from the standpoint of the engineer or not, I find this behavior annoying when I'm using throttles that have a toggle switch for direction (like the Digitrax UT4). I just can't get comfortable with the notion of throwing the switch to the RIGHT in order to have the locomotive move LEFT. However, when I'm using a throttle that just has a button to control direction (e.g., a Digitrax DT200), it doesn't bother me at all, perhaps because the Digitrax system has a little locomotive icon, and a directional arrow that appears at the front or rear of the locomotive icon in the LCD screen - so if I look down and seen the arrow at the rear, I know the train is in reverse and vice versa. Since I'm not physically throwing a toggle switch in one direction or the other, it doesn't bother me. But it bothers me so much with a toggle switch that in my main yard and on my local trains, I set them up so that the direction of the toggle switch is always in sync with the direction of the train. That means one of my locals is technically running it's engines in reverse (though you don't notice it because I use 2-unit diesel consists coupled back-to-back, so one of the diesels is always pointing forward). But my mental state is much improved!John C.
I added an extra relay to my throttles. This relay is called the direction relay. When a train goes through some kind of reverse loop, the computer throws this relay automatically. My throttle has forward and reverse and that stays true no matter what. When I am setting a train up to run, I have a indicator on the computer screen that tells me the direction. I just have to make sure it is set correctly at the start.
What Marc describes is something I considered. I am also running regular DC.I have home-made throttles with push-buttons to set direction. They are lighted pushbuttons with an illuminatedarrow in them, so you push, a latching relay closes, and the arrow lights up.The whole layout is a strictly one-train-at-a-time operation, so I could rig an extra sensor and relayto flip the orientation of the buttons and lighted arrows based on where the train is.But that is really getting complicated.I think the key is to get rid of the arrows, and replace them with "F" and "R" (for "Forward" and "Reverse").Honestly, the original suggestion seemed best to me. Once you think about direction as though you are sitting in the cabof the engine, all the rest is simple, whether DC or DCC.
My old power pack had a switch to change direction .. and depending on how i hooked the power pack up ... it would either go one way or the other .. same difference .. if you flick the switch and the loco goes in the wrong direction, throw it the other way ... don't over think this ..
No... the first suggestion really was the best one. Just think of the direction as though you are sitting in the engine,forget about "East" "West" or "Left" "Right", and just think Forward/Reverse.