Yelrow Posted May 26, 2014 Share Posted May 26, 2014 Hi, my peppercorn tornado, on DCC, is very quick, but my new A4 sparrowhawk, runs a lot slower. I have tried adjusting maximum speed, but it makes no difference.Is this because it needs running in, or is there a way to increase speed. Having said that, pulling 5 coaches, or alone, the speed remains constant, john Link to comment Share on other sites More sharing options...
Fishmanoz Posted May 26, 2014 Share Posted May 26, 2014 Are they both Hornby or not John? The reason for the question is that RM sets scale Shunt and Cruise speeds for Hornby locos. For non-Hornby you need to follow the scale speed instructions in the manual to set them. Link to comment Share on other sites More sharing options...
poliss Posted May 26, 2014 Share Posted May 26, 2014 Which CVs did you adjust? CV2 is start speed, CV6 is mid speed and CV5 is top speed. Link to comment Share on other sites More sharing options...
Yelrow Posted May 26, 2014 Author Share Posted May 26, 2014 Fishy, hi, yes, both hornby. Poliss, Nothing technical like that, just increased the cruise speed on RM. Your question, was what i wanted to know. So , you can adjust CVs, if necessary. It has been running for about 30 mins, and has picked up a bit, hence my running question.Dont really want to tinker, john Link to comment Share on other sites More sharing options...
Yelrow Posted May 26, 2014 Author Share Posted May 26, 2014 POLISS, still slow, can i put on programming track and adjust CV, and if so, which to what, thanks, john Link to comment Share on other sites More sharing options...
poliss Posted May 26, 2014 Share Posted May 26, 2014 Isn't there a thingy in Railmaster that sets the CVs for Hornby locos? Link to comment Share on other sites More sharing options...
Yelrow Posted May 26, 2014 Author Share Posted May 26, 2014 Poliss, yes, when you select a loco from the list, it advises cruising and shunting speed.Thats the thing i increased to no effect. Are you saying i should not play with actual CVS, john Link to comment Share on other sites More sharing options...
poliss Posted May 26, 2014 Share Posted May 26, 2014 Depends on whether you feel comfortable adjusting CVs. There's a guide on how to do it here. http://www.nmra.org.au/gndu/EasyDCC/Decoders.pdf Link to comment Share on other sites More sharing options...
Fishmanoz Posted May 26, 2014 Share Posted May 26, 2014 There is lots of detail in the manual on how to do it and some threads where HRMS provides some clarifying info particularly on setting IDs. But go back to Brian Lambert DCC section and you are sure to find some detail as this is basic stuff. You can go way beyond this with what are known as custom speed curves, but forget about them for now and stick with the simple looking at Vstsrt, Vmax and Vmidpoint as poliss says. Link to comment Share on other sites More sharing options...
papajulietdelta Posted May 27, 2014 Share Posted May 27, 2014 Hi I presume Hornby assumes certain values for CVs 2, 5 & 6 when it sets maximum scale speed for a Hornby loco in Railmaster. I believe shunt and cruise speeds are a factor of this maximum. It would be useful to know what settings they expect. Standard Hornby decoder? Cheers Link to comment Share on other sites More sharing options...
Fishmanoz Posted May 27, 2014 Share Posted May 27, 2014 PJD, RM doesn't adjust CVs to get the shunt and cruise speeds for each loco, it just sets the right speed step to make them correct. You can still adjust the throttle up to maximum if you wish without being limited by any Vmax CV setting. HRMS confirmed this on the forums some time ago. Link to comment Share on other sites More sharing options...
St1ngr4y Posted May 27, 2014 Share Posted May 27, 2014 yelrow said: Fishy, hi, yes, both hornby. Hi John, I've been looking for A4 Sparrow Hawk without success - is it a new model? Ray Link to comment Share on other sites More sharing options...
Yelrow Posted May 28, 2014 Author Share Posted May 28, 2014 Hi, ray, R 2991XS BR A4, look on ebay, item no 171337542472, cant answer your question, as bought from advert in france. Mine was brand new, but dont know whether it is an old model. It has full sound etc. Take a look at the one on ebay, and come back to me, john Link to comment Share on other sites More sharing options...
Yelrow Posted May 28, 2014 Author Share Posted May 28, 2014 RAY, forgot to mention, the insrtuctions only give canada and germany addresses, for contact, so dont know whether hornby make export only models, curious, john Link to comment Share on other sites More sharing options...
Fishmanoz Posted May 28, 2014 Share Posted May 28, 2014 Take a look at http://www.hornbyguide.com/item_details.asp?itemid=3923 Link to comment Share on other sites More sharing options...
Yelrow Posted May 28, 2014 Author Share Posted May 28, 2014 Fishy, thanks, thats interesting, as mine was not a uk sale, but was brand new in sealedbox, with additional parts still in sealed envelope. Obviously thats why Ray could not find. The one on ebay, is first i have seen, other than mine, john Link to comment Share on other sites More sharing options...
papajulietdelta Posted May 28, 2014 Share Posted May 28, 2014 Hi Fish I appreciate RM does not adjust or even read CVs when setting up a loco. My point was that if you select a Hornby model it assumes a scale top speed. Whether the loco can actually achieve this speed will depend on the CV settings. Maximum speed could be CV5=256. Top scale speed might be 60mph for a particular loco. So RM might instruct step 64 out of 128 to get maximum speed. If CV5=180 say, and RM instructs step 64 then the loco will run at 64/128 of 180/256 of its maximum speed. Am I making any sense? Are RM speeds dependent on CV5 value or the speed table set? Cheers Link to comment Share on other sites More sharing options...
Fishmanoz Posted May 28, 2014 Share Posted May 28, 2014 Sounds like you have it spot on PJD. Default simple speed table is just the three start, midpoint and max points. In fact, for the basic 8249 decoder, it doesn't support custom speed tables. Also, default for CV5 is 255 I'm pretty sure, so that is always going to be above the scale speed selected by RM. Link to comment Share on other sites More sharing options...
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