Different speeds when consisting

[JRP]

I have two new Athearn Genesis F3's (A&B) and have been able to consist them together (using "basic consisting" with addresses). The problem is the "B" unit moves faster when I turn the throttle than the "A" unit. I want them to both move at the same speed no matter the speed (fast or slow). I thought I read when you consist, the "lead" or "top" address locomotive will overide the other loco CV's attached to it as long as they are a consist. I went to adjust the voltage starts (CV 2, 5 AND 6), but that does not work (maybe that is NOT what I am supposed to do). I also checked each units CV's in the beginning and they were the same. Before I made the consist, they both ran at the same speed with just a slight turn of the throttle (slow creep). That's when CV1 was at the default of 03. All I did was change the CV1 addresses and left all other CV's alone. Is "Advanced consisting" the solution? Thanks JRP

[rrinker]

 No, consisting does not override the settings in CV2, 5, and 6. Try adjusting these first to see if you cna get a decent speed match, before resorting to more complex things liek speed tables. It just has to be close, not perfect.

                    --Randy

 

[DigitalGriffin]

http://cs.trains.com/TRCCS/forums/p/184022/2013087.aspx#2013087

[JRP]

These are the same decoders, not different. Both came as a package from Athearn. Would "speed matching" apply here?

[Hamltnblue]

How much difference in speed are you talking?

[DigitalGriffin]

speed matching is what you are doing

you can either use the 28 speed step table OR adjust start, high and mid

I had the same issue with my Genesis F7 units.

[JRP]

Well guys, Whatever you suggested worked. I cleared and re-set the B unit (again) to factory default, then just added a new address and nothing more. The A unit I tweaked CV's 2, 5 and 6 and made sure to remember to add 16 to CV29 to activate them so that I would control the speed. The units are almost in perfect sync. I guess I assumed here that if both decoders and motors came from the same manufacturer and were pre-programed (at least to run) on address 03 out of the box, that they would run at the same speed. Guess that's not the case. And yes, these are Genesis also. Thanks. JRP

[BIG JERR]

John; I myself like to give my AB sets the same address ,they still have to be speed matched but I dont plan on seperating em so giving them same address saves spots on the zephyr and makes it a bit easyer on my memery cells ,a few of my gp &rs units share an address too ,allows one sound an one no sound again saving spots on the Zephyr...just a thought   Jerry

[richhotrain]

JRP

The units are almost in perfect sync. I guess I assumed here that if both decoders and motors came from the same manufacturer and were pre-programed (at least to run) on address 03 out of the box, that they would run at the same speed. Guess that's not the case. And yes, these are Genesis also. Thanks. JRP

That is a fair assumption. Two similar or identical locos from the same manufacturer should run at the same, or nearly identical, speeds.

Rich

[rrinker]

 You do not need to change CV29 when using CV2, 5, and 6. You only add 16 to CV29 when enabling the complex speed curves, where you need to put values in CV67-94. If you did the add 16 to CV29 without programming values in the actual speed curve CVs, you could have erratic operation if there are random values in there.

                     --Randy

 

[JRP]

Randy, You're correct. I'll need to go back and re-set CV29 to where it originally was (6 I believe) Thanks for the headsup JRP

[rrinker]

6 would be 2 digit address, with DC operation also turned on.

Here's a handy calculator to figure out values for CV29: http://www.2mm.org.uk/articles/cv29%20calculator.htm

Just check the options you want and it will tell you the value needed for CV29.

                             --Randy