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Steves 3D printing workbench (81F aka 81E on other forums) - On Members Workbenches. - More Practical Help - Your Model Railway Club
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 Posted: Fri Apr 21st, 2017 08:46 am
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The Q
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Allan, perhaps this video will help, she prettier than me anyway...
https://www.youtube.com/watch?v=e0rYO5YI7kA

Q



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 Posted: Fri Apr 21st, 2017 05:52 pm
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allan downes
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Thanks Q
Unbelievable but my old worn out brain just couldn't handle it !

Allan

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 Posted: Sun Apr 30th, 2017 09:37 pm
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GagginForraPint
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Another method is called SLS (selective laser sintering) and this can be either plastics or metals.
This method fuses a thin layer of powder using a laser, the 3D part is built up in successive layers. Accuracy is around +/- 0.1 mm on dimensions, the smallest detail around 0.5mm.
You will need some method of creating a computer model of what you want to print.
I've used the process to produce nylon parts at work,with great success, but haven't yet tried it for model purposes.
I can post the companies I've used if anyone is interested?

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 Posted: Sun May 7th, 2017 09:30 am
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81F
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Hello Allan,

Sorry for not getting back but the other half has kept me busy with DIY around the House!

I think the others have explained the process but in simple terms you create a 3D virtual model on a computer aided design package and send it off to a 3D printer. I do not own a 3D printer myself so I use a firm called Shapeways.

The 3d models themselves are built up from cubes, cylinders cones etc. which are stretched and combined to shape whatever I am after. These shapes can also be subtracted from a model to make holes and hollows.

Unfortunately there are limitations. Some materials do not print finely enough or have a rough surface particularly the sintered varieties, but others can be almost as good as die casting, but these come at a price and fine components can be fragile.

So far I've not had much luck with buffers, while I can get them printed the heads trend to snap off unless I make them overscale so I tend to buy commercial castings or turnings.

Also it is good if you want several identical objects since you can just order multiple prints



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Modelling the GWR in the Welsh Borders, and the Glyn Valley Tramway with quite a few bits from elsewhere!
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 Posted: Sun May 7th, 2017 09:31 am
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81F
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One of my latest creations - a GWR Cordon after some fettling (to get the tanks cylindrical, painting and a few bits of wire and Markits buffers and brake stanchion.



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Modelling the GWR in the Welsh Borders, and the Glyn Valley Tramway with quite a few bits from elsewhere!
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