I am trying to add momentum to BLI n scale locos but it does not work. I increased both cv 3 and 4 to 60 and 40 respectively but it has not changed how the loco starts and stops. The engine acknowleged the change with the normal beep. Start voltage is set at 1. I even increased both cvs to 255 but no change? Am I missing something? Also I thought there should be “brake sqeal” when the engine is stopping? No brake sqeal. Anybodyhave any hints? I’m pulling/pushing 6 cars on zero grade. Thanks
Darryl,
Did you verify that CVs 3 & 4 changed to any of the values you entered for them? And did you also cycle power after you changed the CVs?
Tom
I am having the same issue with my BLI N Scale 2-8-8-2 steam locomotive with Paragon 4. I can change CV3 & CV4 to whatever value and it doesn’t change anything with momentum. I am using JMRI & Digitrax to make the program change, and verify by reading the decoder to check the values, which are what I program them to, but no change. Every other CV I change makes a difference to that setting, just not the momentum.
Thanks for any insight.
Wesley
It looks like per the Paragon 3 manual that CV 209 controls the brake sound. The default setting is ‘1’, so maybe try a higher number. However it also says:
“Automatic brake set and brake release may be enabled by setting bit 0 of CV227 to 1.”
But then later in the manual it says CV227 turns the automatic horn / whistle sound off and on? I guess I’d try different numbers in 227 and see what happens, I’ve sometimes had decoders where I’ve had to just try each number one at a time til I hit the one that works.
CV 3 and 4 go all the way up to 255, so maybe you need to set them to a much higher number than you have been? You could also try setting CV 120 to a low number (default is 25) if you have Back EMF activated. CV 120 is ‘Speed Step Smoothing’, the lower the number the smoother the transition from one step to another, which apparently has a similar effect to adding more momentum.
Back EMF ought to be on (CV10 set to 1, not 0), I think
My manual says that CV4 ‘simulates heavy train’ in slowing down, and gives the example that setting it to 20 yields 20 seconds going from full set speed to lowest set speed. Factory setting is 5. It seems possible that very high values might not be proportional to how the decoder implements ‘momentum’ – if 20 = 20sec., a setting of 225 would be over 4 minutes. Are there applications where over even 40 seconds would be desired?
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