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Edited by user 21 November 2010 02:07:51(UTC)  | Reason: Not specified

As the operation of the motor is dependent on many factors, including the settings of the decoder, it is normal that not every set will have the same operating specs. I found that one of my Re 4/4IIs had too much pressure exerted by the spring on the brushes. Once this was adjusted, it worked as expected. I have not as yet received my 37320, but I will test it when it finally arrives on this side of the pond.

Regards

Mike C

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Edited by user 21 November 2010 02:08:17(UTC)  | Reason: Not specified

My post above is simply my intepretation of the statement that Marklin put in the manual, as TomB posted it:



Doesn't change the fact that the above statement is a disclaimer.

Marklin simply says "are designed to be operated together" - this can be literally translated that both models share the same drivetrain (gearing), motor, and decoder (settings) - ie: they share exactly the same drive characteristic from one another.

The rest of the description from the beginning of the words "If problems arise..."
seems to stand up to my earlier intepretation about it. Customers may need to make manual adjustment - that doesn't sound like a guarantee.

Now OTOH if the manual says,
"Both locomotives have been syncrhonized perfectly at the factory to be operated together."

Now we're really talking...

You are certainly entitled to your opinion, Lutz... if this is really your experience.

Anyway, rather than simply saying that my opinion is wrong,
why don't you post your settings or the techniques that you used to guarantee how two models with DCM motors will be able to run in synch for hours without any adjustments needed?

Because in my experience, even if you managed to get even exactly the same models in synch, one or both loks would soon began to "drift" from the original setting. One would began to run slower, or faster. So the distance between the two running models would always change over time.

The prototyical max. speed of both Re6/6 and Re4/4 is 140 km/h.

I first adjusted the Re6/6 to speed setting 175 (of 255). 140,2 km/h on a straight track section.
Then I adjusted the Re4/4 to 167. Also just above 140 km/h.
Both locomotives were initially set to 255.

I have set both the acceleration and decelartion time to 7,5 seconds on both locomotives.
They run perfectly in a double heading.

The adjustments are done with a CS1.

See my excel sheet:
http://www.saebonet.com/Svein/Tog/images/Swiss/37320/37320.xls

My red HAG Re 10/10 set has always run great together.--MM

"Beide Lokomotiven sind optimal aufeinander abgestimmt." = "Both engines are perfectly matched." (according to Mr Google)

Probably, but then I haven't seen the English manual......

Now who is telling Porkies,
Lutz or the rest of the participants in this topic.

NN

Unless Märklin quality controllers match each loco set to its nearest optimal, almost perfect, marklin enthusiasts: perfect running speed, I have my doughts.
The easier way out would be setting the CV's on the same par.

Any Märklin motor (except the C-Sine) has too many obsticles to run perfectley all the time, at the same speed and there is nothing Märklin can do about unless they change the:
1.) Brushplate
2.) Gearing
3.) add Ballbearings

End of story.

I personally would'nt like to run 2 locos as a double header with 2 motors all day.
Another failure is if you leave the Acceleration & Breaking delay "ON".
In my opinion it would put more strain on both loco motors if the speed is not perfect.
Both loco motors would react in the opposite direction of pulling and pushing, with other words if the front loco is going faster it would automatically trying to increase the power and the second loco is getting pushed would decrease its power.
With the breaking & Acceleration delay "OFf" it may limit the push pull friction.

The german interpretation has for some reason allowed some members to assume the word "optimal" means perfect or have been misguided by some cheap translation error.

Unless you have sensors monitoring the motor constantly of its speed and power output you will never, never, never and I say it once more, never achieve the same speed of both locos for a long period of time.

Sofar, who is telling Porkies, if you believe everything is said on this forum on its face value, you are a besotted believer and your path into heaven is granted.

John

I always tried to be a true believer, but than, so many lies are told.
When you find the absolute truth, what do you do with it ? Every body thinks you're telling lies or porkies.
Is it worth telling the truth ? and if you're not, are you a true believer ?.
I like to stick to what I know and I know very little and this makes me almost a true believer. .
What I say, hear, smell and see are 4 different believes and I can't tell you, if any of them is worth the truth.

John

I have tested a little bit more.

My earlier mentioned settings works very well at 80 km/h, with very small individual speed difference.
When changing the speed to 90 km/h the individual speed difference gets bigger.

This means that it will be very difficult to adjust the speed of the two locomotives to be accurate at any speed level.

Anyhow, I think the consist runs very well.

May the Force be with you. Live long and prosper, amen.