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    • July 11, 2020 7:37 AM EDT
    • Did you add the extra capacitor for dirty track?  If so then try disconnecting it.

    • July 5, 2020 6:56 PM EDT
    • My first suggestion is that some of us would appreciate a real name to address you by, in case we can be of assistance.

       Thank you in advance for your kind co-operation.

        Fred Mills

    • July 5, 2020 4:13 PM EDT
    • Unfortunately, the other engines don't have the same board.  

    • July 5, 2020 12:30 PM EDT
    • Would it be possible or worth the effort to swap a decoder from another engine to see if the problem is with the board?

    • July 5, 2020 12:02 PM EDT
    • Did a decoder reset.  Did not resolve the issue.  Sometimes the engine blows right through the block without slowing at all, other times it will do as described above, and other times it seems like it starts to slow, then speeds up, then slows, then speeds back up.  Almost as if it is getting an intermittent stop signal.  But this is the only engine doing it.  My other 3 stop as programmed. 

      I wonder if the decoder needs a software reset?  I hope not.  

    • July 10, 2020 8:04 AM EDT
    • Note that when CV29 is 34 the speed table gets its info from CV 2, 5, 6.  If you use CV29 =50 then the speed table is in CV 67 to CV 94 and you can reprogram these values.


    • July 10, 2020 12:11 AM EDT
    • Strange response from TCS. I have two locos with Pitman motors equipped with the TCS Wow decoder. My BBT-equipped "Connie" is about as good as it gets in terms of sound and control. My C-19 is a bit quirky with regard to the motor's BEMF and the chuff, but otherwise it's fantastic. Certainly no motor speed issues. Smooth as silk, both of them. 





    • July 8, 2020 1:42 PM EDT
    • I have been thinking about why this happened and I think I have an answer, I just noticed one of my cvp T5000 has some issues with buttons sticking and not depressing all the way. Im thinking in one of my programmings for functions it must have put in some wrong cv's and messed up the decoder. The big problem was it wouldn't reset with the convrtr 60. When I disconnected it from that and hooked it up directly to my Lenz system it seemed to reset everything and now it is back to original. If I didnt have another DCC system I would never know. Bottom line is motor and decoder is fine with higher voltages. If they would have listened to my first email and the resting issue it wouldn't have been 3 weeks of frustration. Oh well all is good now.

    • July 8, 2020 12:56 PM EDT
    • I find this interesting in that I have an Airwire T5000 TX and a Bachmann K27 with a G2 RX. I custom installed the G2 such that I can run either with 18 volt battery pack or (through a bridge rectifier) track power using a Meanwell 24 volt switching power supply. I have no issues with either configuration.


      Not being familiar with DCC in general I went to the TCS page for this decoder and looked for the specs for the board.  Having reviewed the Description and Specs tab, I do not see any references to max operating voltage. All references to voltage are for 12 volts DC. From what I am seeing this is what I would refer to as a small scale unit, meant for 0 or smaller scales running on a 12 volt system. That is not to say there are not DCC decoders capable of 18 or 24 volts, by what I read not this one.


      As for Pittman motors not able to run on PWM, that is horse puckey. A motor (without any additional electronics) is nothing more than copper wire would into electro-magnets. PWM is nothing more than a variable frequency (length of on) on-off switch pulsing full power to the motor for a variable length of time. The shorter the pulse (on) cycle the slower the motor runs, the closer to continuous power the faster the motor runs until it reaches maximum power/maximum speed.  Electronic circuit boards on the other hand generally don't like PWM.


      My opinion based on engineering logic and empirical experience.

    • July 8, 2020 9:22 AM EDT
    • Interesting.  I wonder if 24v is max voltage for this motor, and its cranky when its operating right at its limit.

    • July 8, 2020 7:42 AM EDT
    • This is not meant to be a battery vs no battery issue, rather a confusion on why 24 volts is not good for large scale trains/motors in trains.

      While Steam engines mostly run slow, modern diesels run fast and I do have 24 volts on my DCC system and I also have 24 volts DC for engines I did not convert.  I have not had any issues with DCC decoders running in diesels/electrics (Genesis and LCE) at full track voltage and these run great even on DC.  (my layout has a dc system available at the throw of a DPDT switch).


    • July 7, 2020 4:56 PM EDT
    • Ok, as usual I have the weirdest problems with electronics. I was going to swap decoders from another engine when I decided to try it one more time. I brought the engine into my O scale narrow gauge layout, removed the airwire 60, hooked it up to the service track with jumpers then did a complete reset one more time using my lenz system. Took it back to the shop bench and tried it one more time making sure that I only had 18 volts from the battery as per his email. Wouldn't you know, it now works fine. Man am I glad I didn't rip apart the engine.

    • July 7, 2020 1:18 PM EDT
    • I received an answer for Dan at Tech support after he requested info on the motor in the loco.  I feel like I'm being blown off. Here is his answer. I cant believe this is true because my other Accucraft engines have the same motor and run fine and my batteries are 18volts. Anyone have any thoughts on this, is it true?



      I looked up these motors, and despite the overwhelming lack of information about them, our engineers have told me that these are motors that are not designed for model trains. While Pittman was well known for locomotive motors back int eh day, today their manufacturing is not focused on the hobby, and motors such as these are not ideal for this application. What you want, optimally, in a locomotive is a 12V (HO) or maybe a 16V (O/G) 5-pole skew-wound DC motor. The fact that this motor is designed for 24V continuous operation is not ideal for model trains. Our decoders, and subsequently our motor control, are spec'd and optimized for DCC systems operating with 11-18VAC on the track. This works out well for 12V motors (or thereabouts). While it is true that G scale runs at higher voltages, in reality you are not trying to control a motor at the same voltage as your track. We don't claim to be experts when it comes to G or O scale, but running a train above 18VAC is generally unnecessary. Running at higher voltages will introduce excessive heat, more fluctuations in the power supply, and more apparent irregularities in the motor control. (Not to the effect of what you are seeing, however.) 


      After talking it over with the people smarter than I, we agree that changing out the motor is pretty much guaranteed to solve this issue for you. Simply put, these motors are not designed for the PWM frequencies and motor control methods DCC decoders use.



    • July 6, 2020 11:47 PM EDT
    • I didn't notice it on 128 but I was busy trying to calibrate it with the audio assist. never tried 14,  Ill give it a try and report back

    • July 6, 2020 11:37 PM EDT
    • How does it react on 14 or 128 speed steps? (Yeah, 128 speed steps on the T-5000 throttle is a %#@$!, but it's worth checking to see if it's a speed step thing.) 



    • July 6, 2020 1:48 PM EDT
    • Well I received communication for Dan at tech support. supper nice guy, however he had never seen this before, it's being sent up the chain of command. I know they have a goof proof warranty but the install was done in such a way in the boiler that taking it out is a real pain. I hope someone can help me figure it out. Funny thing is it wont reset all the way. I have mentioned this a billion times, you would think that would be a sign somethings really wrong with it. Oh and No, its not locked.

    • July 5, 2020 10:54 AM EDT
    • QUOTE: On your C-19 an adaptor board for the pnp in the tender may help?


      This from the advertising on the C19:

      * advanced nonproprietary plug-and-play electronic printed circuit board to accommodate the control systems of your choice, including DC power, NMRA/NEM DCC, and/or RC operation
      * choose track or battery power pickup, operation according to NMRA or Large Scale railroading practices, and motor power on/off
      * choose either DCC or DC operation of the smoke unit, cab lights, realistic firebox flicker and ash pan glow, and classification lights
      * two optical sensors, one in each cylinder, give you the option of adjusting the timing and count of steam chuffs
      * factory-installed speaker, with wire pigtail, for easy installation of optional aftermarket sound system

      It got delivered on Thursday, but I am not home to read the book yet. I am hoping this means that any DCC boards should PNP.

      Thank you,


    • July 5, 2020 11:57 AM EDT
    • Resetting seems to have fixed this issue.  Thanks.