81F Posted August 5, 2012 Share Posted August 5, 2012 I wish Hornby (or anyone) would produce a list of optimum CV settings for use with Hornby Decoders and each type of loco. Last time I looked on the net there was something listed for a few of the older blue box company locos with someone elses chip. Link to comment Share on other sites More sharing options...
Icurus Posted August 5, 2012 Share Posted August 5, 2012 That would be a nice idea. I have come across a few that have been included in with a review of a decoder's installation. But I guess its a personal thing, and will cause many a discussion on whats best for which loco etc, but would help to provide a good starting point! I think if you use Railmaster connected to your Elite to run your layout, you can select scale speed and this will utilise a set of custom speed cv's for your loco's? Link to comment Share on other sites More sharing options...
Gregd99 Posted August 5, 2012 Share Posted August 5, 2012 Does railmaster really populate a set of custom CVs or does it just adjust the throttle setting it uses to approximate a realistic top speed? Link to comment Share on other sites More sharing options...
Fishmanoz Posted August 5, 2012 Share Posted August 5, 2012 Hornby documentation for Railmaster clearly says it contains data for hundreds of Hornby locomotives going back many years. I'm not sure what it defines though beyond cruising and shunting speeds. Link to comment Share on other sites More sharing options...
Gregd99 Posted August 6, 2012 Share Posted August 6, 2012 I would guess that they just have stored a couple of throttle settings that run the corresponding model at "reasonable"shunt and cruise speeds. Hopefully they leave all the CVs alone. If someone has tuned their CVs then it would be disappointing to have them overwritten:-( Link to comment Share on other sites More sharing options...
Blackbird Posted August 7, 2012 Share Posted August 7, 2012 DCC decoders, Hornby and 'other makes' are supplied with default CV values. It would be nice to know if a table of ALL loco settings was available, but practically, is that reasonably attainable? Evey individual loco whould have it's own values! The fact that the CV settings can be (easily) adjusted to the requirements of the operator is sufficient. Link to comment Share on other sites More sharing options...
81F Posted August 16, 2012 Author Share Posted August 16, 2012 Blackbird said: DCC decoders, Hornby and 'other makes' are supplied with default CV values. It would be nice to know if a table of ALL loco settings was available, but practically, is that reasonably attainable? Evey individual loco whould have it's own values! The fact that the CV settings can be (easily) adjusted to the requirements of the operator is sufficient. I agree, however it would be nice to have a starting point. Say something for an old ringfield, an X04, The newer type motors etc. I'm mainly after values to give smoother running at lower speeds without the lurch that some locos give when slowing to a stop or pulling away. Link to comment Share on other sites More sharing options...
Fishmanoz Posted August 17, 2012 Share Posted August 17, 2012 I think effectively they do that by having loco types with those motors defined in RM. if you were to then interrogate the CV settings for loco types with each of those motors, you should start to get an idea. Link to comment Share on other sites More sharing options...
Gregd99 Posted August 17, 2012 Share Posted August 17, 2012 the hornby 8249 decoder has limited CVs supported so sophisticated cv tuning isn't really an option. the 8245 gives many options for tweaking.... I do wonder sometimes whether you can reasonably use them all! I have found that a common cause of "lurching" is the back emf fighting with the motor/drive mechanism. if you do have lurching it worth experimenting with EMF Feedback Cutout" - CV10. This CV is supported by the 8249 decoder. Link to comment Share on other sites More sharing options...
markSandD Posted August 18, 2012 Share Posted August 18, 2012 Gregd99 said: the hornby 8249 decoder has limited CVs supported so sophisticated cv tuning isn't really an option. the 8245 gives many options for tweaking.... I do wonder sometimes whether you can reasonably use them all! I have found that a common cause of "lurching" is the back emf fighting with the motor/drive mechanism. if you do have lurching it worth experimenting with EMF Feedback Cutout" - CV10. This CV is supported by the 8249 decoder. Link to comment Share on other sites More sharing options...
markSandD Posted August 18, 2012 Share Posted August 18, 2012 CV settings can be tweaked to suit locomotives, but as is true of many things in life, the more you spend, the better the end result! The more expensive 'R8245 Sapphire decoder' is definately worth the money, there is so much more potential to adjust the locomotives performance and behaviour. Especially if you are interested in 'double heading' different classes of steam locos. Some models, such as a certain 'rival firms' models, require 2 settings for 'back EMF', this is (im my opinion) due to the poor quality motor that they use. I have found however, that all of the latest Hornby '5 pole motor locos' that I own, are superb runners even with the cheaper R8249 decoder. In these instances, the default settings work just fine. The rival 'Blue Box' firm is not as good as it used to be. They may make a pretty model, but their models dont seem to have the same 'reliabilty and performance' (in my experience) that Hornby models have. Some people will disagree with me, but over the last few years, I would say that hornby makes the better models, and you dont really need to alter any CV settings. Link to comment Share on other sites More sharing options...
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