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Old Ideas - New Technologies - Scratchbuilding. - More Practical Help - Your Model Railway Club
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 Posted: Tue Apr 8th, 2014 09:59 pm
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wahiba
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A topic that I am quite fond of. of topic for a start take photography. I like using my old cameras with film. However while processing film is messy printing with an enlarger is (to me) a pain. However, using the technology of the scanner and printer I can scan the negatives and print the result without the need to a dark room.

Back to model trains it was my retro throughts of DIY tin printing - really a non starter that re-introduced my to card modelling. Thanks to IT creating and printing ones own models is relatively easy.

Anyone any other thought s on this line?

David



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 Posted: Wed Apr 9th, 2014 12:24 am
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Bod
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I'm looking forward to the possibilties of 3D printing.
Apart from printing whole models imagine the 2D texture sheets we have now in 3D.
Incorporate Wills Sheet or Scalelink windows and doors directly into your design.

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 Posted: Wed Apr 9th, 2014 04:12 am
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Wizmacnz
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Bod wrote: I'm looking forward to the possibilties of 3D printing.
Apart from printing whole models imagine the 2D texture sheets we have now in 3D.
Incorporate Wills Sheet or Scalelink windows and doors directly into your design.

At the moment it isn't quite cost competitive to print the equivalent of  Wills sheet. A scale mortar course in 4mm scale is about 0.16mm. The minimum detail width in the cheaper of the 3D printable materials using selective laser sintering technology is in theory 0.2mm. To achieve a printable texture you need to move to a more expensive technique using acrylic polymer, which can print a rebate down to 0.1mm in width. Unfortunately this is currently more than twice as expensive. However printing costs will fall and resolutions will improve. 

Both of the above is using commercial 3D printing equipment. I have a desktop 3D printer at home and that isn't capable of delivering that level of detail.

I think Wills are safe for a while yet. I think the simpler window profiles are already printable, but the brass etch will still be unchallenged for a while when it comes to the more intricate, small cross section glazing bar stuff.



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 Posted: Wed Apr 9th, 2014 09:55 pm
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wahiba
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Another use for 3D printing is printing with a wax which is then surrounded with plaster. This is then warmed up and through a hole the wax runs away and replaced by metal to produce a casting. The oldest known method of casting and modern technology.

I believe Rolls Royce are looking into/using this technique in engine production. Will be interesting if a hobbyist wax becomes available.

David



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