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Track power connections across baseboard modules - Layout Design, Trackwork & Operation. - Getting You Started. - Your Model Railway Club
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 Posted: Wed Oct 24th, 2018 04:42 pm
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Passed Driver
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Hi Nigel. Thank you for your reply. Funny thing that, your reply seems to have cured the forwarding problem?Your idea is excellent, but, I have already purchased and wired up the connections. I began the end of track copper clad today, and then I read how long I should be expected to wait for the Araldite to set, “ waiting for glue to dry again”
Best wishes Kevin 



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 Posted: Wed Oct 24th, 2018 06:43 pm
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:off topic

Hijacked Paul's thread yet again  :sad:



Ed



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 Posted: Wed Oct 24th, 2018 06:57 pm
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Hi Paul,
My apologies. Offending posts deleted.

Nigel



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 Posted: Mon Jan 7th, 2019 10:17 pm
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Hi guys ...quick update and a snag encountered - having acquired the DB15 breakout terminals and all wiring complete with power flow tested over Christmas, the DB15 (DA15 Game port) cables shown in the linked posting below ... 

http://yourmodelrailway.net/view_topic.php?id=15440&forum_id=6&page=2#p282280
.. are causing me issues as the shortest cable lengths I could acquire were 1 metre lengths. These breakout terminals and cables are being used to connect the point wiring (and CDU feed) across 2 4 foot layout modules but as I'm using 16/02 wiring for all the point wiring runs and with these 1 metre length DB15 cables, I'm afraid i'm losing voltage to drive the 5 individual points on the connecting module - the other module that hosts the CDU works perfectly for 3 individual points on that module. 
To test connectivity, I have bypassed the DB15 breakout terminals and DB15 cables temporarily by connecting one of the point feeds and CDU feed directly across the modules using choc blocks and hey presto, power voltage more than adequate to drive the point.

So .. I'd rather not waste the DB15 breakout terminals so perhaps I'll try and cut / shut the DB15 cable to make it much shorter (which not looking like an easy option) or bite the bullet and ditch the DB15 idea completely and install more connecting choc blocks .... best laid plans :-(    

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 Posted: Wed Jan 9th, 2019 01:11 pm
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As suspected I cannot trim down these cables as it would be far too messy ... and after further testing the small core wiring in these DB15 cables seems not to be able to push through enough voltage from the CDU to trigger the points, based on 16/02 wiring either side of the cables on each module. If all the wiring for the points was 24/02 then it would work (confirmed ... as I have 24/02 feeding all power supplies and switches and connected across the modules using the same DB15 small core cables)
I've ordered some DB15 socket / plug connectors from Railway Scenics and will solder in my own 16/02 wire to make a short cable ... which I am hopeful will do the trick.

If this fails (which I cannot see why it would) then my last option is connecting choc blocks .. will keep you posted.

In the meantime the second control panel is now being wired up ... photos of everything so far to follow.

Paul

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 Posted: Thu Jan 10th, 2019 04:27 pm
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I'm very, very late in on this one Paul but, on speed-reading it through, you seem to be investing quite a bit of cash in the board to board connectors.

I haven't totted it up but wonder if it might have been a better option to have each board free standing - i.e. independently wired from it's neighbour and each with it's own CDU.  That way, you could have used simple banana plugs to power up your main bus wires board to board and have everything on each board wired off those buses ..................... :hmm



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 Posted: Thu Jan 10th, 2019 10:13 pm
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HI Paul, 
I am with Peter on this one and if you look back on the thread I suggested RCA plugs and sockets which you can use with heavier wire and they should take a lot of "punishment" over a time.  You will need 8 Jumpers each between modules 1 and 2  and modules 3 and 4  and 4 jumpers between modules 2 and 3.  

An advantage would also be that you could use thicker wire and voltage drop would be a lot less from your two control points.

I can do an illustration but will be away till tomorrow night unless I can sneak in a few minutes tonight  if you feel the need ...  Bus wiring is straight forward because it is straight through connections which in my field we actually called "train lining" but like a lot of wiring work, it is simply slog...

Hope this helps,

Regards

Trevor


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 Posted: Thu Jan 10th, 2019 10:44 pm
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Hi Trevor .... I am Paul, not Kevin ... seems you called me this before in this thread for some reason.?
Thank you but no need for an illustration ... I did a reply a few mins ago but the posting failed and I lost my text completely :-( ... I'll write it out again tomorrow.

Also Peter ... the cost of the DB15 connectors and cables were not that expensive ... slow boat from China as I was in no rush :-)

More tomorrow
Paul 

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 Posted: Fri Jan 11th, 2019 01:53 am
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Hello Paul

Call it a Senior Moment... I was actually reading a news bit about Kevin Rudd about 2 minutes before I saw your post!!  
Sorry Mate,

Regards

John  Peter  Trevor



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 Posted: Fri Jan 11th, 2019 07:06 pm
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Hi again Peter & Trevor, 
For clarity I have been following Trevor's excellent advice on the electrics throughout my build so far and did consider using RCA or banana plugs - but I'm not sure it would have worked out any cheaper or simpler really. As mentioned, the DB15 terminal breakouts & cables came from China and were pretty cheap if not the fastest of delivery. 
To be clear, I have my 24/02 wired power connections for the isolating blocks successfully connected and working with perfect power across (as per Trevors design) so all good there. Where I DO have a problem currently is the point wiring (7 points on the 2 modules I'm connecting currently) which is using 16/02 wiring throughout and each module feeds into the DB15 terminal breakouts which can handle 10 amps - example below


I've testing and looped a couple of these physically with 16/02 wiring from breakout terminal 1 to breakout terminal 2 (across baseboard modules) thereby bypassing the DB15 cable ... and the points work ok from the East end control panel. As such, the conclusion is the 1m cable is too long and also the small core wire within it is simply not up to the job to transferring and retain the voltage (perhaps tha is why there were cheaper !!). I now have 'virgin' DB15 (DSUB) male and female cable connector ends (75p each from railwayscenics) and will carefully solder 16/02 wiring and make my own cable ... which I'm certain will then work .. also meaning everything you see in the photo remains intact and not wasted - and hopefully still very neat. 

Naturally, the soldering will have to be done carefully and be a little fiddly but I think I'm up to it :-) .. otherwise there is a soldering demonstration and tips stall at the Chiltern Model Railing Exhibition this weekend          http://www.cmra.org.uk/exhibition.html where I can get some extra tips.


Hope this explains better what I'm trying to achieve and that the cost overall has not been excessive at all ... after all there are many ways to connect baseboards :-)

and Trevor, no probs with calling me Kevin ... I also have senior moments myself for sure :-)

cheers

Paul    

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 Posted: Sun Jan 13th, 2019 01:55 pm
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Padster wrote: Hi Trevor .... I am Paul, not Kevin ... seems you called me this before in this thread for some reason.?
Thank you but no need for an illustration ... I did a reply a few mins ago but the posting failed and I lost my text completely :-( ... I'll write it out again tomorrow.

Also Peter ... the cost of the DB15 connectors and cables were not that expensive ... slow boat from China as I was in no rush :-)

More tomorrow
Paul 
I should B. hope not.  Best wishes Kevin 



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