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Author Topic: Dawlish Warren  (Read 8022 times)

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Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #30 on: December 30, 2019, 01:33:45 PM »
It all went together quite well.


Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline exmouthcraig

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Re: My new project - Dawlish Warren
« Reply #31 on: December 30, 2019, 02:05:34 PM »
You'll be running by end of Jan @Chris Morris  :thumbsup:

Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #32 on: January 03, 2020, 09:04:42 AM »
I am a little ahead of what I am publishing here just in case things go wrong. This post is out of sequence as it refers to point control.  I have just posted this on another topic on this forum so I think it is right to post it here at the same time.

I decided to use mostly unifrog points because that is where things are going. The points look fine but it has to be said they are primarily designed to be used with DCC rather than analogue. I prefer analogue and propose to remain that way for the foreseeable future. The main reason I prefer analogue to DCC is that when you change a point you automatically have control of the loco that the points are set to. With Unifrog points this is not the case. Yes you can mess about cutting the wires underneath the point but I tried this and didn't think it was easy( the wires fell off at the wrong place for me) or a good thing to be doing.

I still wanted to use the Unifrog points and I still wanted to have the loco on the track selected to automatically be live when the points changed. My solution is to use latching relays working in unison with the Peco point motor to change the polarity of the frog and automatically provide power to the correct track. It also means that I no longer have to rely on the point blades making electrical contact. This has not been a major problem in the past but it has been an occasional minor irritation.

So here is the diagram for my self latching relay set up.



Basically the coils on the relay are linked to the feeds to the point motor. The frog feed will get power from the track which will change when the point changes. The tracks in the loop are isolated and have feeds from the relay. This feed also changes when the point motor changes.

More photos of the track (which is now mostly laid ) next week.
« Last Edit: January 03, 2020, 09:06:13 AM by Chris Morris »
Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline DCCDave

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Re: My new project - Dawlish Warren
« Reply #33 on: January 03, 2020, 11:00:48 AM »
A couple of questions Chris,

Would those relays work with a DCC track signal, it's pseudo AC.
Where would you attach LEDS to that for display on a mimic board.

Cheers
Dave

Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #34 on: January 03, 2020, 11:13:48 AM »
Sorry I really don't know how those relays would work with DCC. I would expect that if you have something that can interpret the DCC messages and turn them into a pulse of power then it should work. The great thing about these relays is that they are so cheap that you can afford to experiment. I paid 2.89 each off eBay but apparently I was done - you can get them for less than 2 each!
Regarding the led feed you leave out the track feed and replace it with your led feed. Power goes from LED feed to middle top blob on the relay in my diagram. The two blobs to the right are then connected to the LEDs and return power goes from the LEDs to the LED power source return.
Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline Gizzy

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Re: My new project - Dawlish Warren
« Reply #35 on: January 03, 2020, 11:54:13 AM »
Another great layout construction for me to watch....
Gizzy

Gentleman, scholar, railway modeller....

Offline belstone

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Re: My new project - Dawlish Warren
« Reply #36 on: January 03, 2020, 04:32:48 PM »
I used self-latching relays for frog switching on my last layout (which included a live frog diamond crossing) and they worked perfectly, much better than microswitches.  I think the design life on them is something like 100,000 operations so they should last reasonably well.  If I did it again I'd be tempted to get some PCBs made up for them to keep things neat and also allow a relay to be swapped easily if it fails at a show: I used Veroboard and ended up with wires everywhere.

Looks like a very promising project: I visited Dawlish Warren as a small boy and have a photo somewhere of a "Western" passing through on an express. I'm not entirely sold on your visible curves yet but I'll wait and see how it looks with some scenery.  Good luck with it, I'm hoping to start baseboards on my new project this weekend.

Richard

Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #37 on: January 09, 2020, 10:50:38 AM »
With baseboards complete a dry run with some track.

Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #38 on: January 09, 2020, 10:56:05 AM »
The track fitted the pre cut baseboard tops quite well and so I got on with permeant track laying. Followed by testing. Though I say it myself I rather like the transition curve leading into the station on the down track.


The curve at the other end will be the sea wall. I have Built the widest curve possible on the 40" baseboard.




Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #39 on: January 09, 2020, 10:59:21 AM »
Please note that this is ruff testing only. Once the Scenery is in place there is no way a Western with full yellow end will be allowed anywhere near chocolate and cream coaches.
Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #40 on: January 09, 2020, 01:09:17 PM »
Another photo at what will be the East end of the station

Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline Jeremy Edwards

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Re: My new project - Dawlish Warren
« Reply #41 on: January 11, 2020, 02:19:31 PM »
I can't wait to see it 'with its clothes on'.  It looks a very interesting project.

Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #42 on: January 14, 2020, 09:08:21 AM »
It will be some time before the layout "has its clothes on". Recently I have been working on the station buildings as they were in the 1960s. You can get an idea of what they looked like here - https://images.app.goo.gl/UaJmQeEMH78Z3d95A

There is more work to do on these but they are now intact.
Up platform. A wooden building built coca 1912. It became a railway museum from 1974 until 1984 and bunt down in 2003.



The original down platform building only lasted until
1924 before it succumbed to fire. It was replaced by a smaller corrugated iron building which I think was demolished in the 1980s.


Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline Chris Morris

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Re: My new project - Dawlish Warren
« Reply #43 on: January 14, 2020, 09:11:34 AM »
My thoughts are now turning to the platforms. This will be interesting as they were far from normal. Up until the late 1970s the platforms were entirely supported on timber posts. Now modelling that is going to keep me quiet for a while...
Working doesn't seem to be the perfect thing for me so I'll continue to play.
Steve Marriott / Ronnie Lane

Offline weave

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Re: My new project - Dawlish Warren
« Reply #44 on: January 14, 2020, 10:20:14 AM »
Hi Chris,

Just had a look at old photos of the station. That is a job. Perhaps you could find some sort of lattice fencing and adapt it somehow? As Lesley Nielsen says in Airplane, 'Good luck, we're all counting you'  :D.

The buildings look great by the way.

Cheers weave  :beers:


 

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