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Here's the place for discussions about those 3D creations for Tguage...and lets not forget the trials and tribulations of designing and printing.

Ribblehead Viaduct for Blea Moor

Postby martink » Sat Nov 18, 2017 6:50 am

The model of Ribblehead Viaduct for my new layout Blea Moor will be entirely 3D printed. It is designed using OpenSCAD, and printed on my FlashForge CreatorPro in ABS with standard (0.2mm) resolution.
Building such a large model pushes OpenScad quite hard - its rendering is notoriously slow when dealing with a large number of polygons, especially brickwork or stone blocks.

The model is built from three distinct pieces: 2x abutments, 3x king piers and 4x 6-arch viaduct sections.

The model attempts to reproduce most of Ribblehead's distinctive features, including the two rows of 5 protruding blocks, thicker base and drain pipes on each pier. The dimensions, including curvature and width, are as accurate as I can manage. The overall length is approximately 36", turning by 4" (14 degrees) over its length. The piers and abutments are printed right-way-up, but the 6-arch sections are printed upside-down to minimise the need for supports and ensure very clean and crisp arches. Since the trackbed is then underneath, that area tends to be a bit dirtier.

To minimise the annoyance of OpenSCAD's slow rendering, the arches and their normal piers are generated separately and combined into a single printed component in the Slicer. A block of 6 just barely fits into the build volume.

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Re: Ribblehead Viaduct for Blea Moor

Postby zdrada69 » Sat Nov 18, 2017 8:03 am

Impressive project. Looking forward for progress in the project. I had a possibility to see this Viaduct 25 years ago when I was a student on Tempus Programme at University of Bradford.
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Re: Ribblehead Viaduct for Blea Moor

Postby martink » Sat Nov 18, 2017 8:19 am

The last of the CAD images and my collection of small test builds, improving steadily from crude to almost-there...

The three final (!) test pieces are being printed at the moment.

via-cad4.jpg
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via-test1.JPG
via-test1.JPG (194.17 KiB) Viewed 241 times
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Re: Ribblehead Viaduct for Blea Moor

Postby martink » Sat Nov 18, 2017 1:09 pm

... and the full set of final test pieces. Probably time to switch to that reel of white filament. :-)

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DSCI0031.JPG
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Re: Ribblehead Viaduct for Blea Moor

Postby Nutter » Sat Nov 18, 2017 2:08 pm

you know you want to do it in yellow really :lol:
Looking good so far.
Mike based on the Southern side of London

All spray painting done outside, cleaning in ultrasonic done on dry days when i can have a window open.
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Re: Ribblehead Viaduct for Blea Moor

Postby martink » Fri Nov 24, 2017 2:31 am

And here is the full thing. Assembly and painting will be deferred until the layout is ready for it.

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DSCI0035.JPG
DSCI0035.JPG (144.12 KiB) Viewed 183 times
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