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DCC - effect on old Farish loco's

8135 Views 17 Replies 10 Participants Last post by  jeremyshotts
My first posting but I'm sure you guys can help me.

I'm starting a layout after many years absence and reading through this forum and the usual publications it seems obvious to go down the DCC route for a new layout However I have a number of old Poole built Farish loco's that I would like to convert to DCC but I'm not sure what effect DCC will have on these as they were built to either be running or left in an isolated section. They were not built to sit idle in a powered section of track, is it likely to burn out the motor and should I plan to add some isolated sections or do the decoders help protect the motor? Finally I only intend to use two function wired decoders on the loco's (can't see any reason for more functions as I don't plan to use sound), are there any types I should avoid installing on Farish kit.
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... in the end I put in 50 for acc, and 10 for dec, and it totally smoothed out the problem...
I find it surprising how little use is apparently made of CV's 3 and 4. For 'road' traction that has to move heavy trains, 50 is about as low as I start. Values in excess of 150 in CV3 will deliver a good representation of a steam loco starting an unfitted freight at the heavy end of its load rating, picking up one wagon at a time at below walking pace so the guard isn't thrown off his feet, then gradually grafting up to the usual circa 20 mph line speed.

I am regularly disappointed at exhibitions when DCC operated locos snatch an unfitted freight all into motion within two seconds, and are running at circa 20mph within a train length.

Seeing such an operation at one show on a very well modelled layout, and the DCC system in use was Lenz which I have, I asked whether I could demonstrate what was possible. The loco was already programmed so it ran at scale for 20mph at speed step 12. I used PoM to set CV3 to 180, then resumed control and started it away by entering speed step 12. Predictably enough it smoothly and slowly eased into motion, and went away gradually grafting up to line speed. Opinion was violently divided. One of the exhibitors was most impressed. The other three wouldn't consider it: why would we want to do that?; we exhibit to drive the trains...
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