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Fishmanoz

Signature: and thanks for all the fish

Bio: 65 years old and new to railway modelling

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Fishmanoz

9840 posts

Whilst I run the risk of being seen as part of the "mates' club", might I reflect on how this post has developed with a view to seeing if we can now be more kind to each other leading into the "festive season".  And might I start by observing that, if Hornby's since-departed dedicated forum administrator Adam had still been on duty, I believe this topic would have been shut down by now.  Simple reason is the question has been asked and answered and subsequent posts are detracting from rather than adding to technical and observational replies.

 

Returning to my reflection - new contributor Ken (I'm Aussie, I like to abbreviate names of more than one syllable and lengthen those with only one, my apologies) has asked a simple question about performance of a Gaugemaster decoder. He's received a number of useful replies, one in particular listing a range of adjustments he might make to improve performance and observations from others with experience using the decoder, more bad experiences than good.

 

But there's more.  Ken's first reply is from Chris, a highly experienced forum moderator, giving the same reply he gives to many - steer clear of the blue button when replying.  Chris is one of our more technically competent contributors with excellent documentation skills that show in his replies. All the blue button achieves in 99% of cases is duplicating in a yellow box someone's previous reply, often also trapping their own content in the box.  Ken misses this tip, and in his first reply uses the blue button, adds his reply below, then copies and pastes the yellow box contents and adds it again below his own reply.  Chris, as a matter of clarity and good content, removes Ken's reply with its duplicated content and adds back Ken's contribution on its own such that it is easier for contributors to see.

 

But there's more - Ken's most technically detailed reply comes early on from Flashbang, one of our more knowledgeable contributors.  In my opinion, Flashbang comes in the top 3 for overall model railway knowledge on the forum, particularly DCC knowledge.  His technical reply is thorough and to the point.  However his first line reflects on what many know to be the case - often this forum is deficient in knowledge of non-Hornby products when compared to other forums, hence asking on these other forums can often lead to better advice than this one.  With hindsight, Flashbang might agree that he could have worded this line better, but that is up to him.

 

From this point in my opinion, replies go downhill.  They are either further clarification of the lesser knowledge of non-Hornby products on the forum or, more seriously, claims and counter-claims that replies might be interpreted as being abusive, or in fact are abusive.

 

In my lengthy experience on this forum, I have rarely seen contributors setting out to be abusive and, when it occurs, it is usually shut down by forum administration very quickly.  I don't believe any contributor to this thread intended to be abusive, only that some on reflection  might have chosen their words more carefully, taking into account that intention behind the message can be misinterpreted when only the written word is available.

 

So returning to my first point, could we all try to be a little kinder to each other?  This has not been a good year for many reasons but that does not excuse as from being at the least polite, even when we disagree with others.  

Finally, others may disagree with what I've said above and wish to express their views in further replies.  They may even think this is Fishy attempting to claim the moral high ground, but that is not my intention.  However, I think I have said all I wish to on this topic, so please accept my apologies if I don't reply further.

and thanks for all the fish

Fishmanoz

9840 posts

Using Hornby gear, via a USB connection from an Elite to your computer. Cannot be done with a Select.

 

You might also re-read the 2 yr old thread first page that you've added to.  It is explained there. 

and thanks for all the fish

Fishmanoz

9840 posts

Might I give a simple summary of the 3 pages of hypotheses and conclusions to this simple original question and supplementary question (ignoring the burnt out item):

 

Must you fit a decoder to the non-motorized dummy car - No

 

What features do you miss out on by not fitting one - directional lighting that can be switched on and off on DCC

 

What do you get on DCC with the blanking plug fitted - lights on all the time.

 

What do you get on DCC without the blanking plug - no lights.

 

and thanks for all the fish

Fishmanoz

9840 posts

As Chris intimated, being able to write CVs is pretty much independent of being able to read them.  

To write CVs 1 (short address), 3 (accel), 4 (decel) and 29, just follow the instructions in the RM manual to do it via your eLink.  Can't remember if you can have long addreess (running number?) with it is an 8215.

and thanks for all the fish

Fishmanoz

9840 posts

Colin, I too think HB should be more careful with his suggestions. 

After all, trailing wool is sure to catch and damage something around the layout and Murphy decrees that whittle shavings (or is that spoon shavings) will get caught in the most inconvenient places - I would think drive trains. 

and thanks for all the fish

Fishmanoz

9840 posts

Am I missing something here?  Speaker needs to be 8 ohm, not 4 ohm.  Rob, I hope you mean your 4 ohm ESUs are in series not parallel?

and thanks for all the fish

Fishmanoz

9840 posts

To mix a couple of metaphors - with no ini file contents, RM won't know if it's Arthur or Martha and there will almost certainly be tears before bedtime sometime soon.

 

What I would suggest to recover from this "mistake" is to delete the empty ini file then, making sure everything is turned on and operating, download the latest RM from the link at the top of the forum and install (even if you did that only yesterday).  That will cause RM to create the default ini file for your setup.  RM does this when no ini file is present but won't change even an empty ini file if it finds one. 

and thanks for all the fish

Fishmanoz

9840 posts

Adding to Flashbang:

 

3) The loop should not be so long that more than one train can be entering or leaving at the same time. 

and thanks for all the fish

Fishmanoz

9840 posts

It certainly does Rob, by not having any CVs for it.  Given my understanding, and as I said above, it would be 4th order in any case. 

and thanks for all the fish

Fishmanoz

9840 posts

Yes, your next step is to experiment with CVs 153 and 154 with CV150 on 1, or you can put it back to 0 and do similarly with CVs 151 and 152.  Here are some links to where this has been covered previously:

 

https://www.hornby.com/uk-en/forum/getting-smooth-running-from-tts-decoders/?p=1

 

https://www.hornby.com/us-en/forum/hornby-class-60-decoder-problem/?p=1/

 

https://www.rmweb.co.uk/community/index.php?/topic/129827-tts/page/3/

 

The lower CV of each pair is your P value and the higher your I (Colin, there is no D).  The main adjustment is P and you will see from the links, you start with it at a low value, increase in increments of 10 until it stops being jerky then continue on steps of 10 until it goes jerky again.   Now decrease in steps of 5 until non-jerky again.  This is now your optimum P value.

 

You can now do similarly with I using CV 152 or 154 (depending whether CV150 is 0 or 1).  If I'm reading this one correctly, you again start at 0, increase until it gets jerky again, then back off to smooth. 

For the technical, what you are doing here with P is to have the change in motor speed to be critically damped when you adjust the controller.  Then as you increase I, this gets you to the critical damping point more quickly (steeper leading edge on the speed curve).

 

Putting it another way, the first order change you make is which is better of motor algorithm 1 (proportional) or 2 (linear).  Then the second order is the optimum P for the better algorithm.  Then the third order is the best I value for optimum P.  Colin, D would be fourth order if it was there.

 

Trust this helps.  Please read my words in conjunction with the links provided.

and thanks for all the fish

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