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1995 stock tube train in N scale - On Members Workbenches. - More Practical Help - Your Model Railway Club
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 Posted: Fri Jul 1st, 2011 03:23 pm
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Burkitt
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When I first tried to fit the body over the chassis they were a bit tight and I didn't want to force them together in case they broke - or got stuck. Having given the chassis and inside of the body a going-over with fine sandpaper, I've now successfully tested the two parts together. I did think I'd have to use small screws to hold them together, but the fit is sufficiently tight that I don't think that will be necessary.



Paul

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 Posted: Sun Jul 10th, 2011 09:55 pm
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Burkitt
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As well as working on the first printed driving car, I've also been making some changes to the CAD model to incorporate some improvements. I wasn't happy with the underframe details, but couldn't find any good photos of it on the net, so I took a ride to Edgeware to take some of my own. Using them I have been able to increase the accuracy and detail quite considerably.

Before


After



Other modifications to the design have been made to improve the fit between the chassis and body, strengthen some vulnerable parts, and allow more space for the bogie to rotate in. I have also been working on the CAD models for the intermediate cars. The whole lot should hopefully be available to order on Shapeways within a couple of days.

Paul

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 Posted: Mon Jul 11th, 2011 07:55 am
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ddolfelin
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Can't wait for the paint to go on.
Fascinating work.



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 Posted: Thu Jul 14th, 2011 06:30 pm
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Burkitt
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Thanks Ddolfelin. I've got a couple of coats of paint on now, still several more and lots of sanding to go. I think I'll also need to use a scalpel to remove a bit of paint from some of the details where they have become slightly clogged.









I have also tested assembly of the trailing bogie. The fit between the sides and centre was a bit sloppy so I have tightened it up on the design, as well as reducing the thickness of the bogie sides to improve clearances.




With modifications to the design and design of the intermediate cars now complete, I have made the 95 stock models available to order from Shapeways. There are three vehicles, the driving motor, the trailer car, and the uncoupling non-driving motor. Each includes the body, chassis, and bogie parts. The driving motor and uncoupling non-driving motor are available in two versions, one unpowered with parts for two trailing bogies, and one designed to be powered with a Kato Portram bogie, with parts for one trailing bogie and sideframes only for the power bogie.
If anyone is interested they can be ordered from my shop on the Shapeways site http://www.shapeways.com/shops/amr(link posted with permission of Robert).

Paul

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 Posted: Sat Jul 16th, 2011 09:13 am
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ddolfelin
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Paul, there seems to be heavy 'graining', especially on the rebated edges of the windows etc.,.
While I realise this can easily be remedied, I wondered if it is in the manufacture or the paint.
Not a criticism, just interested in the process.

Also, unless you are going to fully fit the interiors, I would paint inside first for preference but I expect you have this under control.



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 Posted: Sat Jul 16th, 2011 08:03 pm
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Burkitt
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Ddolfelin, the grainy texture is a result of the layers of plastic being laid down during the 3D printing process. It is visible on all 3D printed models, though much less so on Frosted Ultra Detail than with earlier materials. With several coats of paint and plenty of sanding it should all become smooth.
With regard to the interior, the detail that needs painting, is all on the chassis. The wall panelling on 95 stock is plain white, so I gave it a coat with the same spray as for the exterior.

Paul

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 Posted: Sat Aug 27th, 2011 05:38 pm
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Burkitt
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Following several more coats of paint and lots of sanding I thought I'd post another couple of pics to show how the 95 stock is getting on.



The rough surface of the printed plastic seems to have been mostly smoothed out by the paint and sanding. Luckily the details have not got lost under the paint, despite being only 0.1mm deep.



The ends still look a bit rougher, but since the front will be painted red getting the white perfect is not so important as for the sides.

Paul

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 Posted: Sun Aug 28th, 2011 02:42 am
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Gwiwer
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Definitely watching with interest here. Tube cars are tiny at the best of times and to achieve this sort of detail in N is amazing.

I've also alerted Adam (Photoman) to this topic as another N-gauge modeller who might be interested in the technique.

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 Posted: Sun Aug 28th, 2011 12:40 pm
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georgejacksongenius
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Very,very interesting!(I sound like the German sniper from Rowan & Martins'Laugh-In):mutley
I do really think at some distant point in the future,you should consider buiding a full layout for this to run on.

Cheers,John.B.:thumbs

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 Posted: Tue Aug 30th, 2011 12:05 pm
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Chubber
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Absolutely fascinating!  I'm thinking window frames, Georgian porticoes etc, as moulds for plaster/resin casting.....

I wish I had that degree of mastery of SketchUp, too. :thumbs

Thanks for posting,


Amazed Doofer.



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 Posted: Wed Aug 31st, 2011 05:15 pm
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Photoman
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That is some fantastic work! I do love 3D printers.

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 Posted: Tue Oct 4th, 2011 03:52 pm
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Burkitt
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Thanks for your comments all.

Two trailer cars have been delivered from Shapeways.



The quality of the cleaning of the model by Shapeways seems to have improved considerably since the first DM, there is none of the yellow wax and the plastic looks almost clear.



I have added much more detail to the underframes for the new vehicles, though this is difficult to see without any paint on. Two more updated DMs are also on order, so I will be able to put together a slightly shortened four car train.

Paul

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 Posted: Tue Oct 4th, 2011 04:10 pm
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Petermac
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Those bodies look super Paul but I see you still have a banana for a chassis .................:???::roll:  Is that a heat problem with the mouldings ?



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 Posted: Tue Oct 4th, 2011 04:25 pm
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Burkitt
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Thanks Petermac. I think the banana resemblance issue is to do with the very thin chassis not having any longitudinal vertical faces, eg sidewalls. It is not a problem though as the bodies are very rigid and provide all the strength to the car, the chassis really serve only as floors.

Paul

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 Posted: Tue Oct 4th, 2011 08:27 pm
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Petermac
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That's good news.  At first, I wondered if they were specially designed to negotiate all the switch-back gradients you find on the tube ...........:roll::thumbs



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 Posted: Mon Oct 10th, 2011 07:45 pm
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Burkitt
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Having sprayed and sanded coats of white paint to the point that I am happy with the surface of the 95 stock driving motor, I have now started adding the other colours. There don't seem to be any exact colours available as enamels, so I'm using the closest matches from the Humbrol and Revell ranges. The blue is done, but a few more coats of red are needed, then the grey front and rear panels, roof, and black details.
I have ordered a complete four car train of a later, slightly improved design, so this DM is serving as a testbed for finishing and painting methods.

Paul

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 Posted: Wed Dec 7th, 2011 02:03 pm
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Burkitt
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After a long delay, which included Shapeways losing the model, then reprinting it banana-shaped, before finally getting it right, I now have a complete four car train of 95 stock. The wait hasn't been too bad either, as Shapeways have been very generous with compensatory vouchers.



The finish seems to be very good on the latest prints, though a bit of waxy residue is left, so cleaning will be needed before painting.



Hopefully I'll be able to get the train painted and finished over Christmas.

Paul

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 Posted: Wed Dec 7th, 2011 02:30 pm
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ddolfelin
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Starting to look something now, Paul.



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