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Wow diesel decoderV4. Odd behaviour when decelerating.

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  • Member since
    October 2016
  • 8 posts
Wow diesel decoderV4. Odd behaviour when decelerating.
Posted by Peterjh on Monday, June 19, 2017 12:05 PM

I have installed the above decoder in an Athearn Gp 38. all works well, but for when I slow the diesel down. the loco has a jerking action at every speed step decreased. I have reset the decoder over and over again. I increased the momentum to a value of 100 , and still the same action. I have never before had this situation with any of my other wow sound decoders. What am I not getting here?Any thoughts as to how I can sort this out?

Tags: WOW sound
Peterjh
  • Member since
    June 2004
  • From: From Golden, CO living in Puyallup (Seattle), WA
  • 750 posts
Posted by Renegade1c on Monday, June 19, 2017 1:29 PM

its most likely an issue with Back EMF (BEMF). I have for the most part turned it off on the few TCS decoders I have. I speed curve all my locomotives to a common speed curve to the BEMF doesn't seem to play well with that in my experience. Others may have different opinions on it. 

there is a section in the manual about calibrating the BEMF. you may want to look at that as it may be part of the issue. 


Colorado Front Range Railroad: 
http://www.coloradofrontrangerr.com/

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  • Member since
    April 2004
  • From: Ontario Canada
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Posted by Mark R. on Monday, June 19, 2017 9:19 PM

(Edit) - Sorry - Misread the OP's post ....

Mark.

¡ uʍop ǝpısdn sı ǝɹnʇɐuƃıs ʎɯ 'dlǝɥ

  • Member since
    February 2002
  • From: Reading, PA
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Posted by rrinker on Monday, June 19, 2017 9:58 PM

 It's a WOW, not Loksound. TCS does an automatic tune without activating the feature like ESU. 

                                  --Randy


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

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