Search found 216 matches

by junctionmad
Sun Dec 16, 2018 2:28 pm
Forum: Baseboards and Carpentry
Topic: Scenic modules
Replies: 26
Views: 7127

Re: Scenic modules

Very nice , I like the idea of storage over the layout but I’m always freaked that I’ll drop something onto the layout

Dave
by junctionmad
Sun Dec 16, 2018 2:21 pm
Forum: Scenery and Structures
Topic: painting paving stones and platform copings
Replies: 14
Views: 2631

Re: painting paving stones and platform copings

This is a gwr station modelled on the badminton line and as you say has the typical mix of gravel Coping and paving stones Like you say I have some colour photos and shows a general dilapidated “ concrete “ style colouring but clearly it’s not concrete ( nor can contemporary photos be replied on ) t...
by junctionmad
Sat Dec 15, 2018 11:53 pm
Forum: Scenery and Structures
Topic: painting paving stones and platform copings
Replies: 14
Views: 2631

painting paving stones and platform copings

I always struggle with deciding on suitable colours Id like guidance on how to paint my station platform paving stones and platform copings , I think the colour is light stone , grey but I also have to weather it to represent its conditions in the 1950s I mainly use Tamiya to airbrush Any help much ...
by junctionmad
Tue Nov 27, 2018 6:14 pm
Forum: Signals and Control Systems
Topic: Lever Frames
Replies: 93
Views: 73262

Re: Lever Frames

I’m an embedded systems engineer , so the technology is fully accessible to me Hi Dave, Ah - that makes a huge difference. Even though that might mean that such a solution will not be available to every one, I hope you will still post details of how it is done as I think plenty of people would like...
by junctionmad
Mon Nov 26, 2018 10:32 pm
Forum: Signals and Control Systems
Topic: Lever Frames
Replies: 93
Views: 73262

Re: Lever Frames

My intention is to implement simple “mechanical “ interlocking , electronically. The software is custom and runs on a processor directly interfaced to the switches on the frame. All I will use is an independent light ( bi color ) led , at the foot of each lever , moving a lever incorrectly , will ca...
by junctionmad
Thu Nov 22, 2018 10:43 am
Forum: Signals and Control Systems
Topic: Lever Frames
Replies: 93
Views: 73262

Re: Lever Frames

I’m just about to go to a pcb for a microswitch solution for the Mk2 lever frame , this fits under the frame and also provides a base plate for the frame I’ll post soon with details Personally with electric switching , I see no point in mechanically locking the frame, electrically interlocking is ea...
by junctionmad
Wed Nov 21, 2018 12:46 am
Forum: Tools and Techniques
Topic: Best Rolling road
Replies: 15
Views: 3715

Re: Best Rolling road

Thanks for everyone’s opinion

Dave
by junctionmad
Mon Nov 19, 2018 12:24 am
Forum: Tools and Techniques
Topic: Best Rolling road
Replies: 15
Views: 3715

Re: Best Rolling road

Thanks chaps
by junctionmad
Fri Nov 16, 2018 12:10 pm
Forum: Tools and Techniques
Topic: Best Rolling road
Replies: 15
Views: 3715

Best Rolling road

I asked this on rmweb then thought this might be a better place

Leaving aside cost , Whats the best rolling road , Multi gauge , self contained, strong , well made and rigid

thoughts ?

regards
Dave
by junctionmad
Sun Oct 14, 2018 11:17 pm
Forum: Signals and Control Systems
Topic: Mk2 Lever frame musings
Replies: 54
Views: 10802

Re: Mk2 Lever frame musings

Err , I meant , great thanks , quite happy to buy an mk1 etch to get the numbers Ah - that is different :thumb ... perils of forum misunderstandings ... :D Best WIshes, no worries ! I just ordered the DCC Concepts numbering system, DCS-CS99, panels are 5.5mm by 9mm, so should be nice , numbers run ...
by junctionmad
Sun Oct 14, 2018 10:34 am
Forum: Signals and Control Systems
Topic: Mk2 Lever frame musings
Replies: 54
Views: 10802

Re: Mk2 Lever frame musings

Just an update re lever numbers , I notice DCC Concepts do a separate pack of brass numbers for their lever , which might be useful to number the mk2 levers
by junctionmad
Thu Oct 04, 2018 9:37 am
Forum: Couplings
Topic: The ‘Burford’ Auto-coupling
Replies: 4
Views: 1524

Re: The ‘Burford’ Auto-coupling

I read the document , very comprehensive text wise But short on diagrams ( no side or front view diagrams )

And As has been said a couple of photos would be very useful

Thanks again Martin

Dave
by junctionmad
Sat Sep 29, 2018 4:43 pm
Forum: Electrics
Topic: Scalefour lever frame & Cobalt point motors
Replies: 9
Views: 1669

Re: Scalefour lever frame & Cobalt point motors

Cobalt IP motors have a built in terminal specifically for this function In the case of the classic omega , the pin marked feedback is simply a ½ resistive divider of the motor supply voltage Hence on split supplies you get a +5 and -5v from the feedback pin but only as long as the motor voltage is...
by junctionmad
Fri Sep 28, 2018 8:37 pm
Forum: Couplings
Topic: Auto- Couplings , what choices - decisions
Replies: 36
Views: 5891

Re: Auto- Couplings , what choices - decisions

While I agree auto couplings are a personal choice. Or more correctly , the layout chooses them. But I do think there are engineering benefits that mark one coupling over another. The fact that under optimum benign conditions most autocouplings work very well , but then so does everything

Dave
by junctionmad
Fri Sep 28, 2018 8:32 pm
Forum: Signals and Control Systems
Topic: Mk2 Lever frame musings
Replies: 54
Views: 10802

Re: Mk2 Lever frame musings

OK, so I could buy an etch to get the numbers , great , thanks dave I don't recall anyone suggesting that for a moment. The etches Paul was referring to are all in the scrap boxes up and down the land. I have quite a large pile of them as it happens. Err , I meant , great thsnks , quite happy to bu...
by junctionmad
Fri Sep 28, 2018 8:28 pm
Forum: Electrics
Topic: Scalefour lever frame & Cobalt point motors
Replies: 9
Views: 1669

Re: Scalefour lever frame & Cobalt point motors

The lever frame is designed for a SPDT microswitch. In order for this to operate a colbalt directly , you will need a split DC supply ( ie , +12, -12, 0v )
Alternatively you can use the microswitch to operate a DPDT relay , and hence use conventional single sided DC power supplies
Dave
by junctionmad
Thu Sep 27, 2018 3:06 pm
Forum: Signals and Control Systems
Topic: Mk2 Lever frame musings
Replies: 54
Views: 10802

Re: Mk2 Lever frame musings

A plate and numerals 1-9 several times would be sufficient , numbers could be soldered on etc My question was if anyone is doing something like this already ? Anyone who has built one of the Society's Mark 1 lever frames should have a large number of spare plates lying around. Each etch comes with ...
by junctionmad
Wed Sep 26, 2018 10:36 pm
Forum: Couplings
Topic: Auto- Couplings , what choices - decisions
Replies: 36
Views: 5891

Re: Auto- Couplings , what choices - decisions

..... even if I don’t encounter them myself (sorry, I’m not trying to sound smug but I was taught the coupling by the above named gentleman who had probably sorted most problems before most of us were even born) Ever thought of demonstrating at Scaleforum ;) I for one would love to sit down and wat...
by junctionmad
Wed Sep 26, 2018 10:32 pm
Forum: Signals and Control Systems
Topic: Mk2 Lever frame musings
Replies: 54
Views: 10802

Re: Mk2 Lever frame musings

Howard my comments come as I build this 59 frame and are based on my experiences My “ wish list “ is just that nothing more The reason I mentioned a test baseboard is that is difficult to “ test the lever frame “ as the micro switches arnt an integral structure and hence as I build each 5 lever set...
by junctionmad
Mon Sep 24, 2018 7:44 pm
Forum: Layouts and Operations
Topic: Traverser locking
Replies: 10
Views: 2492

Re: Traverser locking

I have one of those knife switches , I don’t know about yours But there is considerable slop in the mechanics
by junctionmad
Mon Sep 24, 2018 7:39 pm
Forum: Signals and Control Systems
Topic: Mk2 Lever frame musings
Replies: 54
Views: 10802

Re: Mk2 Lever frame musings

Howard my comments come as I build this 59 frame and are based on my experiences My “ wish list “ is just that nothing more The reason I mentioned a test baseboard is that is difficult to “ test the lever frame “ as the micro switches arnt an integral structure and hence as I build each 5 lever set ...
by junctionmad
Mon Sep 24, 2018 5:51 pm
Forum: Signals and Control Systems
Topic: Mk2 Lever frame musings
Replies: 54
Views: 10802

Re: Mk2 Lever frame musings

I wonder has anyone sourced a suitable plate/numbers that could be soldered to the lever ?

Dave
by junctionmad
Mon Sep 24, 2018 5:48 pm
Forum: Couplings
Topic: Auto- Couplings , what choices - decisions
Replies: 36
Views: 5891

Re: Auto- Couplings , what choices - decisions

I await the write up with interest

My project is an exhibition layout. And I agree with the general comments around the reliability of the AJ coupling. I found it brilliant when accurately aligned but it’s toofragile for exhibition use
by junctionmad
Thu Sep 20, 2018 10:17 pm
Forum: Layouts and Operations
Topic: Traverser locking
Replies: 10
Views: 2492

Re: Traverser locking

Guy Rixon wrote:As with turntables, discussed elsewhere on this forum, a round-ended plunger pushed into a v-shaped or conical notch is a good way to get repeatable positioning.

Correct

And simple microswitches can be arranged to power the appropriate road , there’s no need for wiping contacts
by junctionmad
Thu Sep 20, 2018 10:13 pm
Forum: Couplings
Topic: Auto- Couplings , what choices - decisions
Replies: 36
Views: 5891

Re: Auto- Couplings , what choices - decisions

Couplings seem to me to be one of those Cinderella subjects and often an afterthought whereas the coupling adopted can have a big effect on layout planning; especially operation. Is it possible that, that which, in the UK at least, we seek to replicate is a flawed system in the first place. That is...

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