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Just converted to DCC and need some help

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  • Member since
    August 2017
  • 55 posts
Posted by Scandinavian on Sunday, August 6, 2017 9:12 AM

Thanks for your answer,

I set the CV3 to "0", no change
I set the speedstep to "128" no change

Then i set the CV30 to "2" (reset to factory) and there was a change, to loco can run much slower - prefect!, but it still "jumping ahead forward" when increase the trottle, but with smaller intervals, like - 1mph, 3mph, 5mph, 7mph

Anyway, progress :)

Where to go from hear, i have no clue...

Regards
Pete

 

  • Member since
    September 2004
  • From: Dearborn Station
  • 24,281 posts
Posted by richhotrain on Sunday, August 6, 2017 9:01 AM

I'm thinking that the wires are not connected tightly on the decoder or else the gears need to be cleaned in the trucks. Since the loco is new, it isn't likely that the gear lube is the problem, but you never know.

Rich

Alton Junction

Moderator
  • Member since
    June 2003
  • From: Northeast OH
  • 17,249 posts
Posted by tstage on Sunday, August 6, 2017 8:19 AM

Pete,

It could be two things - one or both:

  1. Is your momentus set too high? - Set it to "0"
  2. Is your decoder set to 28 speed steps - Set it to "128"

It's possible that the multiMAUS is fighting the "dithering" (BEMF) of the NCE decoder?  You could try resetting the decoder to factory settings then confirm how it runs on address "3".

Tom

https://tstage9.wixsite.com/nyc-modeling

Time...It marches on...without ever turning around to see if anyone is even keeping in step.

  • Member since
    August 2017
  • 55 posts
Just converted to DCC and need some help
Posted by Scandinavian on Sunday, August 6, 2017 3:53 AM

Hi Guys,
First post for me in this forum... Smile

I'v been in the hobby since 1985 apox. when i joined a Sn3 narrow gauge guild, but now i'm modeling diesels in the H0 scale and looking forward to an 2x9 foot switching yard.

I thought the DCC seemed to be a step in the right way so i bought an inexpensive Roco mulitMAUS 10810 controller. And then ordered an NCE D13J decoder for my new WaltherProto EMD SD9 (SP).

It was just a plug and play 9pin connection, no problem there...
And the mulitMAUS was used before so it was just a "start up and go".

The problem i trying to overcome is the jerky running, the loco starts very nice and slow, but when i increase the trottle... there is nothing for a while, then the loco jumps ahead to a faster speed, then there is nothing again, and the jumps ahead.

Its like there is: 1mph 5mph 10mph and nothing between.

I tryed to set different values on the CV's, but i'm not close to a smooth ride.
(when i save a new value the loco jump forward half an inch, is that ok)

I have scanned through a lot of post in the forum but not found a workable solution. Hope some one here can shine a little light over the matter.

Its quite a high learning curve from DC to DCC if yu want to grasp all of it Black Eye

Thank you very much
Greetings from: Pete

 

 

 

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