Jump to content
 
  • entries
    172
  • comments
    1,473
  • views
    376,503

Keeping in Control – DC Panels and Controllers


Silver Sidelines

3,121 views

An outline of the current layout would not be complete without reference to the controllers and switch panels.

 

8251749195_b3e9bf5790_b.jpg

Diagrammatic Controllers and Panels 2005

 

At the start of construction in 2005 there was a lot of trackwork and rolling stock from previous incarnations dating back to the 1980s. In 2005 DCC was not considered and the layout was to be operated by quality Gaugemaster controllers using ‘cab control’. The diagram above shows the initial layout of control panels and controllers.

 

Originally it was planned to use Gaugemaster E and D controllers. However at an early stage I came across one of Gaugemaster’s inertia controllers with brake simulation and subsequently two Model P and one Model DS controllers were purchased. The control panels are diagrammatic representations of the track layout with press buttons (momentary contact) for point operation, single pole double throw centre off toggle switches for track sections and single pole single throw toggle switches for isolating sections.

 

As currently configured the layout contains 120 points and crossings and the trackwork is divided up into 60 operating sections with a further 58 isolating lengths for loco sheds and bay platforms.

 

8250462444_6dd1aa0068_b.jpg

Panels 1 and 2 - the Main and Branch Junctions

(NB RL = Reversing Loop, PL = Passing Loop, DD = Diesel Depot)

 

8250460700_80f96c7175_b.jpg

Panels 3 and 4 - the Main and Branch Termini

 

Controllers A and B provide the power source to Panel No.1 – the Main Junction and double track continuous run. Controller A is also one of the power sources for Panel No.2 – the Branch Junction – the second power source for this panel being Controller D positioned by the Branch Terminus. Controller C provides the power source for Panel No.3 – the Main Terminus and Controller D provides the power source for Panel No.4 – the Branch Terminus, for both Panels 3 and 4 the second power source is provided by Controller A.

 

My wife was looking over my shoulder at these pictures and was asking why the controllers appeared to be lettered back to front. My answer is that Controller A is the Main Controller and is wired through to all four panels and hence was able to control a train anywhere on the layout.

 

There is a slight anomaly regarding the Reversing Loop (labelled RL on Panel No.2). The Reversing Loop is really part of the double track continuous run and the associated double pole double throw centre off toggle switches should really have been located on Panel No.1. However to optimise the size of the individual panels it was convenient to place the switches for the Reversing Loop on Panel No.2 powered by both Controllers A and B.

 

8132241273_ebc24d7a7d_b.jpg

Underside of Baseboards between Control Panels Nos 2 and 3.

 

The layout uses ‘cab control’ with a common return. Initially all the points were connected to a common ‘bus’ powered from the AC outlet on Controller B. The view above shows the Blue and Brown cores taken from household mains cable which form the Points Bus and Power Bus (common return) respectively. Also at the top of the picture there are red, black and copper conductors stripped from another mains cable (labelled the Panel Interconnector). The red cable links Controller A with Panel Nos.3 and 4, whilst the black cable links Controller D (Branch Terminus) with Panel 2. The bare copper wire carries the AC supply from Controller B to the push buttons on Panel Nos. 3 and 4.

 

8252439588_5fb9bf4682_b.jpg

Diagrammatic Controllers and Panels 2012 – with Extension

 

In 2011 the layout was extended into its present configuration. The Main Terminus was converted into a double track through station and a second reversing loop was added. For control purposes Panel Nos 5 and 6 were added, powered by a second Gaugemaster DS controller (Controllers E and F).

 

8250458954_b664cab1f4_b.jpg

Panels 5 and 6 - the Extension

 

Panel 5 operates the double track exit from the station whilst Panel 6 uses double pole double throw centre off switches to operate the second Reversing Loop and hidden sidings.

 

The extension is connected to the same Power Bus (common return) as the rest of the layout. However the points for the extension are powered separately from a Points Bus connected to Controller F.

 

8249521947_b973c6cebf_b.jpg

Close up of Controllers E and F showing changeover switch ‘X’ used to connect to Controller A

(NB the Blue Carpet Tile under the Controller to deaden the 'Mains Hum'.)

 

In order to provide a link between the old and new parts of the layout the three cores from another mains cable were disassembled. One of the cores was used to bring power from Controller A (the Main Controller) to the changeover switch labelled ‘X’ which is used to switch the input to Panels 5 and 6 between Controller A and Controller E, and hence maintaining the ability of Controller A to operate the whole layout.

 

8249523633_fee01c516b_b.jpg

Close up of Controller C showing changeover switches ‘X’ and ‘Y’ used to connect Controllers E and F to Panel No.3

 

The two other cores from the disassembled mains cable are used to connect Controllers E and F to changeover switches ‘X’ and ‘Y’ positioned above Controller C explicitly to give Controllers E and F full control of Panel No.3. By means of these two toggle switches Controllers E and F can if required operate the complete Main Terminus / Through Station.

 

Occasionally I allow my mind to wander and I think about Digital Control. Quality controllers like the Gaugemaster DS and P units provide stepless control from zero output – so very smooth operation. I have a significant number of steam outline locomotives. In order to pull a realistic length train up the gradients on this layout I have had to use the spaces provided for digital control chips to add extra lead ballast. All my rolling stock has metal wheels and all the points are Electrofrog. It is very therapeutic to hear the

of the wheels across the points. Do I want ‘other sounds’ – station announcement, engines ticking over, wheels screeching? I suppose the answer is yes, but perhaps all that is needed is some background noises played through some strategically placed ‘decent’ speakers. For the moment ‘going digital’ does not seem to offer any benefits – in fact quite the reverse.
  • Like 5

6 Comments


Recommended Comments

Ray,

 

It's like reading where my own blog should be in a year or two's time!! I too have chosen Gaugemaster inertia controllers (and some of my own making - a blog entry to come), but for now am also making use of a couple of old Duettes - no comparison.

 

I have also elected cab control - but using signals to change controllers. There are also changeover switches like yours, to switch out a panel for one man operation.

 

I looked at DDC but for the same reasons, opted against it.

 

Your panels and wiring look so good. Neat and tidy.

 

It is good to be able to see what my layout might one day be like, there are so many similarities. It's (hopefully) like a time machine.

 

I look forward to reading about your continuing developments.

 

Regards

 

Rich

Link to comment

........ but using signals to change controllers

Rich

Rich, now there you have me - more details please.

 

Love the comments about Duettes - all good modellers will have owned one - the wire wound rheostats wore out on mine:

 

3061506924_20024f31f1_o.jpg

 

Thanks Ray

Link to comment

Ray,

 

Loving the match sticks in the auxillary output! I've just done that again as a temporary fit up for the CDU!! The plugs are in my work box.

 

My plans for cab control are that all signals and points are operated by servos using MERG Servo 4 boards. They are triggered by simple on off switches, so I have bought DPDT switches for each signal or point. One side of each switch works as a simple on off for the servo and the other side can either be used to "lock" some of the signals to points or to switch power feeds from one controller or another to a track section ahead of the signal. I use common return wiring just like you.

 

The rationale behind this is that whilst the Starting signal remains "on", the local controller has operation of the station. However, when that operator pulls the Starting signal "off", he hands control over to the operator in advance. There will have been an exchange of bell codes prior to that. When the Starting signal is pulled "off" and the route shown as clear, the local operator sends "train on line" to the man ahead who then drives the train towards his own station. When it arrives, he sends "train out of section" to the man in arears and the Starting signal can be restored, putting control back to the local man.

 

I hope that make sense.

 

The similarities between our layouts are uncanny, but you are years ahead of me - and much neater!

 

Rich

  • Like 1
Link to comment

 

Loving the match sticks in the auxillary output! I've just done that again as a temporary fit up for the CDU!! The plugs are in my work box.

 

Rich

Rich - thank you for the detailed reply - I think I can feel the need to do some Googling. My layout is essentially 'one man' operation (sequence). You are well ahead of me as regards signals. Your idea of interlocking the switches for points, signals and sections is sounding very like the real world. What make of signals have you in mind or will they be a blend of home made?

 

Yes I wondered about 'posting the picture' of the matchsticks - I think the temporary situation lasted quite a long time.

 

Regards

 

Ray

Link to comment

Ray,

 

That's the way of layouts - once its working, there's always something else to do.

 

I have some Ratio kits for the Christmas break - both the Quick Assembly and the "detailed" ones. I also have more Merg kits to solder - and my first inertia controller to finish.

 

I bought 5 home signals from ebay. A chap called "track and signalman" (ebay name) makes them. I think the Ratio Quick Assembly kits are the best ones. Two bracket signals are stuck somewhere in the post!!!

 

The breakthrough for me was the servos and Merg kits. The servos can be programmed to move quite slowly and you can also get a "bounce" at the end of the pull - and they also need on/off switches, instead of passing contact. I don't know of anyone that makes a double pole switch where one side is passing contact for sollenoids and the other is on/on for section switching.

 

First priority for me though is to get the reverse loops working again. I have a short somewhere. Also to make it all as clean as possible and find a way of keep it clean and working in a fool proof manner. It's too fickle at present and I need to build the Junction station over it. I'm working out in my head how to work under the Junction for wiring and servos and to get to the loops if needs be. Yes I know I should have sprted it more at the planning stage........ It is all sounding like a hinged baseboard and cut rails at each end. Oh well.

 

Do you have a blog or are all your bits on separate sections?

 

Regards

 

Richard

 

Regards

 

Rich

Link to comment

Silly me. I've found your blog points.

 

Talking of running to a sequence, have you thought of going against the clock? I've found a pc progtamme called fast clock. Not only does it put a big digital clock up on the screen, whic can run from 1:1 up to any speed you want - say 3:1, but it can show your timetable moves as they come up on the clock if you want.

 

As you do, I wrote out a fully worked timetable whilst on holiday in the summer. I hadn't even got the loops and continuous run built by then! Oh well.

 

Rich

Link to comment

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...