Phil,
some motors don't draw enough current for the ACK to be detected by
SPROG/Decoder Pro. You may need to hold the wheels or some such to
increase the current draw.
Ian



In message <f9skl0+kst9@eGroups.com>, Phil Dunlop
<pndunlop@...> writes
>
>Good Day all;
>
>I have the above set up, and just recently, like yesterday, tried for
>the first time to program a digitrax TF-4 function only decoder.
>What a dismal failure, sigh.
>
>I've never had a problem with this set up before, done Tsunami,
>Loksound, Soundtraxx, and Digitrax motor control decoders, all with
>no problem.
>
>Don't know if it's a sprog or decoderpro problem. I tried direct to
>decoder connections, and various resistor ideas trying to simulate a
>motor load, etc. Decoderpro reports an error "stopping due to no
>locomotive detected". It's pretty adamant about it. It's not the
>decoder, I was able to program one on a digitrax programming track.
>Did Digitrax design a decoder that only works on their system in
>spite of what the instructions say? Am I doing something stupid??
>Any ideas would be appreciated.
>
>Cheers
>phil d
>
>
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>13/08/2007 10:15

--
Ian Birchenough