Variant of the Carl Arendt SAP Line

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lesmond
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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sat Oct 07, 2017 8:35 pm

This one is due out at the NDMRS show in April of next year, so its all hands to the pump to get it done.

The turntable is crucial to the alignment of the rest of the track, so today I glued the track to the mdf top, and once that was set added one of the plastic sides to level the top with the top of the sleepers. I'll add the second one tomorrow, and then start planking it with gakked coffee stirrers, with one or two planks in fresh wood to show repairs. I painted the edges of the rails with a Humbrol light brown acrylic, dry brushed lightly with black when dry, to take the shiny off the sides.

The wiring will follow the turntable installation, so using MS Publisher I made the insert for the control panel:

Imagepoop panel by lesmond2009, on Flickr

This will be laminated tomorrow and the holes made for the switches etc, before I fit it to the mdf back panel.

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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sun Oct 08, 2017 9:46 am

Second acrylic side added, planking will start later:

Image2017-10-08 09.24.57 by lesmond2009, on Flickr

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Re: Variant of the Carl Arendt SAP Line

Postby docnjoj » Sun Oct 08, 2017 2:29 pm

Looks quite interesting. Watching and learning.
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Re: Variant of the Carl Arendt SAP Line

Postby johna » Sun Oct 08, 2017 5:57 pm

Looking forward to seeing it in Bangor next April.
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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Tue Oct 10, 2017 7:22 pm

Be sure and say "hello" :)

I've added the power feeds to the rails, and started planking the turntable:

Image2017-10-10 17.48.14 by lesmond2009, on Flickr

The other side will have an inspection hatch set into the planks, and the whole thing will be trimmed and sanded into a circle slightly bigger than the plastic once the planking is all on.

I've also printed, laminated and cut the control panel overlay. The aluminium panel was made ages ago, next is to glue both together and open the holes for the switches and LED.

Image2017-10-10 17.59.45 by lesmond2009, on Flickr

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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sat Oct 14, 2017 5:11 pm

Planking finished, just to add "nails" and finish the inspection hatch (currently a square piece of styrene):

Image2017-10-14 17.44.24 by lesmond2009, on Flickr

It looks fairly ok (I think, anyway) in place:

Image2017-10-14 17.50.01 by lesmond2009, on Flickr

That'll do for today as my neck is killing me :(

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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sat Oct 21, 2017 8:24 pm

Minor progress over the last couple of days. The control panel has now been drilled out, section and other switches added, and the whole thing trial fitted to the back mdf panel:

Image2017-10-21 20.59.56 by lesmond2009, on Flickr

Image2017-10-21 21.00.29 by lesmond2009, on Flickr

Just the pot. for the volume and lucky green LED to add, then connect it all up, then I can think about laying the track.

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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sun Oct 22, 2017 4:49 pm

Today I made a start on the track sections. Alignment with the turntable is crucial, so I made the section which runs into the shed first. This is a piece of Hornby OO straight track with 1/2" or so trimmed off. It joins to the Atlas square crossing inside the shed. It will be buried in the ground cover (DAS) so the sleeper spacing etc doesn't matter.

Image2017-10-22 17.04.33 by lesmond2009, on Flickr

The track which will act as the fiddle yard inside the shed is a piece of Peco On30 flex track which needed trimmed by 3/4" or so. It was the nearest in length piece of track I had to hand, and really won't be seen, so in it went.

Image2017-10-22 17.04.41 by lesmond2009, on Flickr

I also had a look at the curve at the right hand side. I'm not sure whether to use the 3D printed track base here as it will be lost in gravel and weeds, so might well use another full length of Peco On30 flex track run through the rail bender instead. The 3D printed base will give a steadier curve, though.

Image2017-10-22 17.06.02 by lesmond2009, on Flickr

That's it for today.

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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sat Oct 28, 2017 5:12 pm

A bit of a bonkers week in work, so no progress until today.

I've made and fitted all of the track sections except for the curved one. These were cut to length with Xuron cutters, and stuck to the foam base with caulk. All expense was as ever spared. It now looks like this:

Image2017-10-28 17.19.27 by lesmond2009, on Flickr

and with the mock up loading bay in place:

Image2017-10-28 17.19.53 by lesmond2009, on Flickr

Power feed were soldered to each track section prior to fitting and dropped down through the pre-positioned plastic tubes. Care was taken (and a meter used) to keep the polarity of each piece correct. The track sections are now held down with heavy lead / acid batteries, and will stay that way until the morning.

Just the curved bit to go.... :shock: :shock:

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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sun Oct 29, 2017 4:29 pm

Now that the track is down and set firmly in place, some revisions and modifications have been suggested.

From the start I've always wondered if there was room for another track coming off the turntable, without taking away from the design and also without the whole thing looking cluttered. There was some discussion last night on the Gn15 & G9 Facebook group last night, and it was mentioned that this arrangement:

Image22905005_1639693049384716_4785283942454401114_o by lesmond2009, on Flickr

would add to the operational potential (big words and everything today :) ), which seems like a good idea to me.

The area of the loading bay will need to be reduced, which is no problem and means I can make it a wooden structure rather than brick / concrete as was originally planned, but on the plus side I'll have room to store full loads of litter ore for processing as well as empty flat cars awaiting bagged cat litter for dispatch as well as making shunting that bit more interesting. The turntable will hold one wagon plus locomotive, so there could well be lots of short movements.

The space at the end of the current short siding will become locomotive fuelling and light maintenance. with a bit of a lean to added to the brick wall which makes up the side at that end.

The control panel will also need to be modified. This works out well as I've one of the small switches left over and felt a bit sorry for it as it wasn't going to be used and I felt it was lonely and crying in the switch drawer.

So, taking full advantage of being up an hour early this morning, I cut a short piece of On30 track to length and stuck it down. I left well enough alone for a bit, then bodged up some wiring and a controller to test it:

https://www.youtube.com/watch?v=WWYzMr- ... e=youtu.be

Happily it appears to work ok. I need to add sleepers to the turntable ends of the two sidings, and will when the turntable comes out again.

Next is to make the curved track for the right hand end. I'm going to make this in two pieces, with the first piece joining to the square crossover, and ending half way down at the side where there is 1 1/2" or so of a straight. Once this is made and stuck down, I'll add the second piece to meet up with the turntable. This will hopefully make things a bit easier to fit and align.

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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sun Oct 29, 2017 8:09 pm

Last for today. There is wine with my name on it.

The curved section which has given me plenty of anxiety turned out to be not too bad, but another interesting problem has arisen. More of that later...

I had a look at the amount of track needed for the curve which turned out to be roughly 2/3 of a length of Peco track. After some head scratching and all previous ideas binned I made it from one piece of track, cut slightly too long and then joined to the square crossing with fishplates, stuck loosely down and trimmed to length at the turntable end. It looks like this:

Image2017-10-29 17.52.50 by lesmond2009, on Flickr

From outside rail to outside rail is just under 10". I've no idea how to calculate radius but it is as tight as I'd want to go without pre-bending the rails first. Power is fed in from the crossing end only as its one continuous rail. It works, too:

https://youtu.be/9y2TX_ExWb4

Using a lot of jump leads to power the track, I tested running on to, off and across the turntable. Thankfully, with very careful alignment, it worked too, although there is no margin for error at all. Wagons, especially when empty, will need to be heavy and consistent in their weight to ensure reliable running. Thankfully I have plenty of lead :) .

The original left hand siding needs to have its rail height lowered by 1/2 mm or so as it is causing occasional derailment when moving left to right on to the turntable. This should happen by fitting a sleeper and sticking it to the foam base.

The differential between the code 83 square crossing and the code 100 Peco track will be addressed with a file as there is a bit of a bump there too.

The most annoying thing is that the dead section of the square crossing matches the wheelbase of the Bachmann 0-4-0 perfectly, resulting in a stop unless travelling at speed. I refrained from harsh language once I found this, and will try to think of a cure which does not involve major track surgery. Thankfully the area in question is off scene, so if the big hand is needed its not the end of the world.

As an experiment, I tried some other 4 coupled locomotives to see if a suitable substitute would work. The Hornby "Smokey Joe" type doesn't like the radius at all (so no visits from the fireless crane or vertical boiler locomotives), a Bachmann On30 Porter 0-4-2 derails the trailing bogie. I've an 0-4-0 as well, but couldn't be *rsed didn't take the time to get it out. A Model Power Hustler also doesn't like the radius. There is a Spud in a box with some other bits which should be ok, but I can't currently find it as it was bought in January and is under some layers.

So.. that's the track down, and mostly working. I'm happy with progress today, and will let the whole thing sit until (hopefully) tomorrow evening when I'll have a look at the revised control panel. I've taken advantage of the revision caused by the new siding to move some of the text round a bit and amend the name to "Patented Olfactory Obfuscation Products (Feline) Ltd" in case there is confusion over what sort of litter it actually is. Best to be careful with these things.

Les
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Re: Variant of the Carl Arendt SAP Line

Postby DCRFAN 3 » Mon Oct 30, 2017 4:57 am

Why do you need a dead a section in the crossing? I'd power it.

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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Mon Oct 30, 2017 8:51 am

Its the nature of the piece of track. Its a bit like a dead frog point - there are plastic sections between the powered rails.
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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Fri Nov 03, 2017 6:06 pm

I'm away this weekend (unsupervised, too) so there probably won't be a lot done. In light of this, 'cos I was home early from work (1pm finish on a Friday), I fitted the back and side mdf sections. They'll likely be off again, but with them in place I can get the wiring done. I reprinted the control panel to reflect the new siding through the week, and drilled / fitted it on Wednesday evening.

It now looks like this from the front:

Image2017-11-03 16.28.35 by lesmond2009, on Flickr

The left hand end will have a very low relief 2 1/2 storey office building back, probably made of brick, with a door out to the loading dock and blacked out windows. The back will have a corrugated iron shed from the end of the mdf panel joining to the offices, extending out to the edge of the brown paint. The curved roof will attach to the top of the mdf panel.

The track from the turntable will run into the shed through a sliding door, with just enough room to hold a locomotive and one wagon on the square crossing. The hand of Les will deal with unloading after the locomotive reverses and the door closes. 

This is it from the back, with plenty of provision for access. The control panel lives above:

Image2017-11-03 16.29.45 by lesmond2009, on Flickr

There is also access from the end, just in case:

Image2017-11-03 16.30.59 by lesmond2009, on Flickr


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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Sun Nov 12, 2017 6:53 pm

After a busy week in which nothing was done at anything much, I settled down yesterday afternoon and yesterday to connect up the wiring. It isn't quite finished yet, 'cos I need a yard of grey wire (none in the local Maplins, none in stock thin enough) to connect up the last track section. So, not finished or tidied up yet, it looks like this:

Underneath:

Image2017-11-12 16.44.29 by lesmond2009, on Flickr

Top, back panel inside (will be hidden inside the shed):

Image2017-11-12 16.42.59 by lesmond2009, on Flickr

The new bit (a "distribution node" which tells me I'm watching too much Star Trek) beside the control panel deals with some "topside" bits. There is the power for the lights, the trigger for the MERG "EzyPoints" servo module to operate the door, and the connections for the speaker.

The visible bit of the control panel looks like this:

Image2017-11-12 16.44.49 by lesmond2009, on Flickr

One of the switches (the one for the Lucky Green LED) broke while I was refitting it after soldering the wires to the back of it, so a slightly larger substitute was used in its place.

So.. after a soldering marathon, I applied power to the whole thing. And, to my delight and also some surprise, it all worked :D .

I initially tested the 12v circuits, everything switched on and off as it should, so then connected a Mk4 controller and tested the track voltages and isolation switches. All good again, with one slight problem of my own making. The fiddle track to the left of the square crossover and the curved section of track are meant to be two separate electrical sections. As I forgot to add insulating fishplates at the square crossing there are currently one big section. I'll cut a slot in the rails with a fine disk before too much more happens, as I'd like these sections to be electrically separated and switched.

Finally, the first train ran. P.O.O.P no. 1 (the as yet unmodified Bachmann Davenport) pushed the prototype skip wagon to the front siding, reversed, and parked up on the "new" siding. As the skip has no couplers that was as far as it went.

Next is to order some grey wire and finish the connections. I'll need a lot for this and future projects (grey is "track section +, switched" in my wiring scheme) so 100m ought to do for a while.

I'm going to take the next couple of weeks playing with the trains testing the running, making more skips and flat wagons, as well as locomotive no. 2. Then its on to ground cover and buildings.

Les
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Re: Variant of the Carl Arendt SAP Line

Postby Bilco » Sun Nov 12, 2017 8:48 pm

It's looking good, Les, if rather more complicated than I'd be happy to do ...
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Re: Variant of the Carl Arendt SAP Line

Postby lesmond » Mon Nov 13, 2017 11:33 am

Thanks, Bill. Its quite straightforward, just a little squeezed in. Having each track section switched does mean I can have three locomotives "on scene" at once... :D :D

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Re: Variant of the Carl Arendt SAP Line

Postby docnjoj » Mon Nov 13, 2017 1:26 pm

If I need a specific color insulated wire I have been known to paint it. Tacky is as tacky does.
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