GeoffW Posted May 20, 2020 Share Posted May 20, 2020 Hi all, can anyone help me outhere I have a couple of O gauge locos whos running is great except at low speeds I seem to vaguely remember it is something to do with a CV setting but which one and how much to charge ? G Link to post Share on other sites More sharing options...
RMweb Premium JimFin Posted May 20, 2020 RMweb Premium Share Posted May 20, 2020 Usually CV 54 and 55 which are the load control parameters. Range of values depend on the decoder manufacturer, need to look up their CV table first. Read what is there and change by about 5 and then fine tune. If the decoders are Lais I would caution against changing them as I had an issue, there seems to be a software glitch that others have encountered as well in that these CV's can mess up the acceleration curves. Link to post Share on other sites More sharing options...
GeoffW Posted May 20, 2020 Author Share Posted May 20, 2020 Is it something to do with back emf? Link to post Share on other sites More sharing options...
RMweb Premium JimFin Posted May 20, 2020 RMweb Premium Share Posted May 20, 2020 Yes Link to post Share on other sites More sharing options...
Crosland Posted May 21, 2020 Share Posted May 21, 2020 10 hours ago, JimFin said: Usually CV 54 and 55 which are the load control parameters. . Range of values depend on the decoder manufacturer, Which manufacturers? Those are manufacturer unique CVs and can have very different functions. Nothing to do with load control in Zimo decoders, for example/ 1 Link to post Share on other sites More sharing options...
RMweb Premium JimFin Posted May 21, 2020 RMweb Premium Share Posted May 21, 2020 38 minutes ago, Crosland said: Which manufacturers? Those are manufacturer unique CVs and can have very different functions. Nothing to do with load control in Zimo decoders, for example/ Agree - thats why you need to be looked up. Valid for ESU, TCS, LAIS Link to post Share on other sites More sharing options...
RexAshton Posted May 26, 2020 Share Posted May 26, 2020 It's worth considering turning dc off in cv29 and removing any tv suppressant capacitors that are factory fitted to the chassis. Both will smooth out operation massively. Link to post Share on other sites More sharing options...
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