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Double Crossover - On Members Workbenches. - More Practical Help - Your Model Railway Club
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 Posted: Thu Jan 23rd, 2014 04:46 am
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Gary
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Ed wrote: Gary wrote: Ed wrote:
The Locos are the right shade of green as well :mutley


Ed

I didn't know that the LNER painted their locomotives Malachite Green.... :mutley:mutley

Cheers, Gary.

Didn't know REL Maunsell painted anything Garter Blue either :mutley:mutley:mutley


Ed


The paint shop manager was crook on that day and left the painting to the colour blind apprentice... :mutley:mutley:mutley:mutley

Cheers, Gary.

ps, apologies Max, back to the track thread...



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 Posted: Thu Jan 23rd, 2014 01:11 pm
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Ed
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Yes, sorry Max.

I saw this on 'that other forum' which appears to indicate you don't need two dead frogs (post #13) for a similar type of crossover.

http://www.rmweb.co.uk/community/index.php?/topic/34896-peco-scissors-cross-over/

I don't know, as I don't use live frogs, just thought it may be of interest.


Ed




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 Posted: Thu Jan 23rd, 2014 01:18 pm
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MaxSouthOz
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I'm not worried about the wiring, Ed.   :lol:

It's the construction that I'm learning about.  I've wired everything and pinned it to the board.

I hope to get a progress shot up soon.

I just have to tidy my bench before I can start the next stage.  :oops:



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 Posted: Fri Jan 24th, 2014 12:42 pm
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MaxSouthOz
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Step 84 . . .  the wiring . . .



Pretty straightforward.  The green wires are for the four frogs.



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 Posted: Fri Jan 24th, 2014 05:28 pm
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shunter1
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Looking good Max.
I like that brass rod idea.
Plus you have kept those couple of dead frogs to a minimum in length so only one wheel will be on a dead section at any one time.So running should be fine and it keeps switches and wireing simple.
regards,
Derek.

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 Posted: Fri Jan 24th, 2014 05:46 pm
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MaxSouthOz
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Thanks, Derek.  All of my locos are bogie-bogie, so it shouldn't be a problem.

My boxcars with the decoder controlled couplers are also bogie-bogie; although I don't see any uncoupling being done in the crossover.

Still, you never know with RR&Co.  :lol:



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 Posted: Sat Jan 25th, 2014 12:50 pm
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MaxSouthOz
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The servos are mounted . . .




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 Posted: Sat Jan 25th, 2014 07:10 pm
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shunter1
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Fascinating stuff Max.
Those servo jobs do look neat. Are those little black connectors anything to do with the polarity switching?
Or is it already built into the servo,s?
Trying to pick your brains on this electric stuff.
Hope you don't mind.
regards,
Derek.

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 Posted: Sun Jan 26th, 2014 01:32 am
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MaxSouthOz
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Hi Derek

Not at all.

I'm still not really happy with the servo mounting, but this is my first attempt.  I'd like to have less packing under them and have a closer linkage to the throw bars next time.

All of my turnouts are built on 6 mm MDF boards, which drop into pits in the base board.  The base board is a foam sandwich, similar to yacht construction.  16 mm MDF on the bottom, glued to 30 mm of styrene foam in the middle and then 6 mm MDF glued on to the top.  It makes a strong, light board but it comes with its own challenges.  Particularly the 30 mm space.

As the thread develops, I'll put up some photos of how it goes together.

I'm also trying to take this turnout through to the end, so I can see how each part affects later parts.  I've already pulled it apart a few times to go back and change things - and there are things I will do differently on the next one.  Continually rebuilding has made this prototype a bit ugly up close, but it's the only way I can try ideas.

I'm painting and ballasting the top side today, so I hope to get an idea of the finished article.

I hope that helps to explain my apparent erratic progress.

The little black connectors are just that.  Just plugs.  Each servo has a (+) and a (-) plus a third wire which is motor control.  Those connectors plug into the ESU SwitchPilot, which is connected to the DCC bus - both for power for the servos and to receive the commands to change roads.

ESU provide extension leads, or you can cut the existing ones and insert your own wires by soldering them in line.

The polarity switching is done by the SwitchPilot.  The green wires are connected to the four frogs which connect to the SwitchPilot.  So you only have four green wires coming in.  You also have one pair of red and black droppers, which connect to the brass bus bars; plus the servo leads.  There are also four isolated stub tracks on the ends of the turnout which have their own droppers so I can connect them to the adjacent Blocks.

I'm hoping it will get easier as I make more.  :lol:




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 Posted: Mon Jan 27th, 2014 01:44 pm
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MaxSouthOz
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Now, where was I?

Close up of the servo mounting . . .



. . . and from the top . . .



. . . and with the electric motor boxes in place . . .



. . . and a bit of paint; a bit of ballast; a bit of grass; a bit of wev'ring - and she's done . . .



The cradle replicates the pit where the module goes in the layout.



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 Posted: Mon Jan 27th, 2014 02:34 pm
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Spurno
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Lovely job Max,beautiful trackwork and some very artistic photos.:thumbs



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 Posted: Mon Jan 27th, 2014 04:30 pm
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Lubly jubly ...........:thumbs:thumbs:thumbs

Are the track pins to hold it all flat Max or just for aesthetics ?  They do make a difference to the overall appearance, as do the bits of  "weed" scattered here and there  :thumbs



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 Posted: Mon Jan 27th, 2014 04:54 pm
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MaxSouthOz
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Thanks, Alan.  The close ups look like that because I use a Raynox 250 times multiplier on my Nikon.  Normally I'd crop the black out, but I didn't want to lose the details on the sides.

Thanks, Peter.  They are the bog standard Peco track pins and, yes they are holding it in place.



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 Posted: Mon Jan 27th, 2014 06:18 pm
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shunter1
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Smashing job Max,
Those close up photo's are are great help.
I also like your way of building seperate point modules with their own mini base boards.
Makes things a lot easier on the back and lining things up.
I shall look further into the servo game.
regards,
Derek.

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 Posted: Tue Jan 28th, 2014 01:07 am
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MaxSouthOz
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Thanks, Derek.  The layout already had modules for the turnouts, so it was quite easy to remove the Peco's.



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 Posted: Mon Feb 3rd, 2014 12:48 pm
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MaxSouthOz
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After much gnashing of teeth and posting on both ESU forums, I'm ready for testing . . .



This test rig has a continuity monitor to check for shorts as it's wired unpowered, then the Rramp meter checks the DCC supply, while the Jesus Box follows the frog polarity.  All good.

Then connect to the Lokprogrammer to enter the addresses and then trim the servos travel using the buttons on the unit.  It also allows you to set the speed of the travel of the throw bar.

And finally . . .



It's kinda satisfying driving on one's own hand made track. 



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 Posted: Tue Feb 4th, 2014 02:29 am
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sparky
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Clever stuff Max,  neat and clean . a treat to watch.



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 Posted: Tue Feb 4th, 2014 02:35 am
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MaxSouthOz
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Thanks, Reg.



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 Posted: Tue Feb 4th, 2014 02:50 pm
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Gary
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That is some very nice handy work there Max. The whole unit is very nicely packaged, very tidy. I'm glad you know what you're doing with all the electrics etc !

Cheers, Gary.



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 Posted: Tue Feb 4th, 2014 05:07 pm
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MaxSouthOz
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Thanks, Gary.  The modules just drop into pits in the baseboard.  I used to have Peco turnouts with Peco motors, but they are too noisy to make movies with, so I've taken them out.  There are eleven of these modules.  Lots to do.



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