MTH PS3 loco not responding to momentum changes on DCC

reading the instructions says CV52 must be set to 1, as you noted.

The fact that it disables the engine completely doesn't make sense.

What numbers are you setting CV 3 & 4 to?

I only run in DCS so I don't have any experience here. I left DCC because it was confusing to me just like this issue. I still have an old DCC system laying around for testing.

Every brand seemed to need special instructions, and most didn't get along with another brand.

I hope someone else here running with DCC chimes in for you.

Thanks for the comments - when I set CV52 to 1 the loco stopped responding but I can’t recall if I did a cold reboot which might be required…I’ll take another look.

are you programming the engine on the main? (POM)

not on a programming track.

rtr_set_dcc_operation.pdf (mthtrains.com)

@Engineer-Joe posted:

are you programming the engine on the main? (POM)

not on a programming track.

rtr_set_dcc_operation.pdf (mthtrains.com)

Thanks, I got it figured out -- resetting CV52 required a cold-boot to take effect and I guess I failed to do that initially. (BTW I can program the MTH loco using the NCE Powercab in either programming mode or on the main -- both work equally well.)

So the momentum variables are working, but the response seems "crude". I'll need to look at the speed curve options I guess. I'm attempting to fine-tune the switcher for operational running on NCE DCC to support a protothrottle. Interestingly, the PT worked by default right out of the box -- virtual plug and play -- but trying to run the loco "prototypically" is going to require a LOT of fine-tuning and I'm not sure yet if this is even feasible. It's pretty clear MTH's decoder is no Loksound 5!

But my biggest concern right now is that the new Railking SW1 is running really rough -- it slows down on curves and over switches for some reason and often jerks to a stop at slow speeds then lurches forward from a standing start. Hopefully this is just a break-in thing but my Lionel locos were vastly better right out of the box. 

make sure there's nothing rubbing like a tire. They do need a break in period.

The reason I settled on mainly MTH was the ease of programming and the ability to handle high power on my O and G scale trains.

I tried several brands including early Locksound. It sounded fantastic. I could not get it programmed at all back then.

Then, every brand did not get along with another it seemed. So I, like many others, picked one brand.

Lionel was a close second but the G scale outside favored MTH's system. There was no Legacy anything back then. Several other brands couldn't handle the amps. NCE had a great decoder, but no sound. Battery was primative.

I'm happy MTH has moved forward and added things like DCC equipped decoders. Yes other brands can be better, but I'm still satisfied.

I can run anything in a consist without changing stuff or worrying.

BTW, the instructions from MTH should state that!

@Garfield Irwin posted:

So the momentum variables are working, but the response seems "crude". I'll need to look at the speed curve options I guess. I'm attempting to fine-tune the switcher for operational running on NCE DCC to support a protothrottle. Interestingly, the PT worked by default right out of the box -- virtual plug and play -- but trying to run the loco "prototypically" is going to require a LOT of fine-tuning and I'm not sure yet if this is even feasible. It's pretty clear MTH's decoder is no Loksound 5!

But my biggest concern right now is that the new Railking SW1 is running really rough -- it slows down on curves and over switches for some reason and often jerks to a stop at slow speeds then lurches forward from a standing start. Hopefully this is just a break-in thing but my Lionel locos were vastly better right out of the box.

Glad you got over that hurdle.  Electronic speed control isn't a cure-all for mechanical problems, it's more like the icing on the cake.  I would disconnect everything and test the loco on straight DC until it's running as good as possible.  THEN experiment with the CVs to get it "dialed in" with the Proto-throttle.

I'm curious, which Lionel locos have you converted!?  Did you happen to post about them?  Thanks for sharing!

@Ted S posted:

Glad you got over that hurdle.  Electronic speed control isn't a cure-all for mechanical problems, it's more like the icing on the cake.  I would disconnect everything and test the loco on straight DC until it's running as good as possible.  THEN experiment with the CVs to get it "dialed in" with the Proto-throttle.

I'm curious, which Lionel locos have you converted!?  Did you happen to post about them?  Thanks for sharing!

Thanks for posting, I agree with your assessment.

I didn't convert my Lionel locos -- doing that would have required gutting them and I didn't want to go to that extreme. I bought an MTH PS3 to run in DCC in order to try Protothrottle, but abandoned that idea for now. Details here...

https://ogrforum.com/...1#184720406322269571