Shapeways HOn30 small diesel

 
  sinn city Station Master

Hi there. Very new to the Railpage, this is quite possibly my first post. Today I received in the mail a shapeways 3D printed HOn30 small diesel body to fit on an n scale bachmann plymouth. My plan is to do a little basic detailing so it resembles a clyde cane loco, not looking for ultra accurate detail, just want to run it for shirts and giggles with some minitrains cane bins. I have to say, the little bugger looks great. So good in fact, I have just fired off an order for a closed cab version, and for a closed cab and a centre cab to fit on a spare kato 11103 unit I have. Was not sure what to expect, but I do like what I got. Not as impressed with the 6 foot wheel base rolling stock frames I also bought, they will require some tidying up, but the loco body looks schmick. If anyone is interested I will try and upload a photo.

Cheers all, and hope everyone is having a happy and safe festive season.

Daryl

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  Aaron The Ghost of George Stephenson

Location: University of Adelaide SA
Daryl,

Can you put up a photo? Which process/material was it pronted in? Shapeways 3D printing ability has a reputation of being inconsistent and not too good generally. I had them print four identical items one time, when they arrived none of the four matched the dimensions planned, and the four were all dimensionally different to each other, one had warped in transit and one had delaminated slightly.
  jrcar Chief Train Controller

Location: Rosanna
My most recent models from Shapeways have been quite nice, they appear to have improved recently.

you can see some pictures on my blog:

http://austnscale.blogspot.com.au/

specifically




I have not cleaned this up at all, just painted it in undercoat.

Cheers

Rob
  Aaron The Ghost of George Stephenson

Location: University of Adelaide SA
Dimensionally how do they compare? Photos and parts might look nice, but when they're 3% oversize and not repeatable what is the use?
  jrcar Chief Train Controller

Location: Rosanna
G'Day Aaron,

sorry haven't and can't measure them physically at the moment. However; when I made the tram, I used two different drawings, in two different materials (Frosted Ultra Detail for the body and White Strong Flexible for the chassis), and they fitted exactly. What you draw you get, to within a very fine tolerance. I have heard of no one having significant problems.

On the VFTY the body was a little bowed over the length, I have modified the design to improve it.

Cheers

Rob
  blue520 Train Controller

Aaron, I just received a set of HO scale locomotive body sections that I designed from Shapeways. The material is the white and flexible, the quality is acceptable for what I need and to the level I expected in using a cheaper material (there is some visible stepping that can be cleaned up).

Using digital callipers (not the greatest, rated accuracy of 0.02 mm) and referencing against the digital model. In 2 axes, walls below 2 mm in width are consistently +0.05 mm greater than what they should be, above 2 mm they are accurate to the digital model (to the level I can measure at).   In the vertical axis (assumed from the stepping pattern) there is an approximate +0.1 mm (range +0.09 to + 0.12) increase. For my uses this is perfectly fine and is well inside Shapeways stated accuracy for the material (± 0.15mm, then ± 0.15% of longest axis). The biggest problem with Shapeways is that there is no consistency between printings of which axis which, that is one of the horizontal axis could be the vertical next time around. In this case it is not an issue but if it was something with ultra-fine detail and especially if it fitted together it might be a major one as one printing may be fine and the next printing problematic.
  Aaron The Ghost of George Stephenson

Location: University of Adelaide SA
Aaron, I just received a set of HO scale locomotive body sections that I designed from Shapeways. The material is the white and flexible, the quality is acceptable for what I need and to the level I expected in using a cheaper material (there is some visible stepping that can be cleaned up).

Using digital callipers (not the greatest, rated accuracy of 0.02 mm) and referencing against the digital model. In 2 axes, walls below 2 mm in width are consistently +0.05 mm greater than what they should be, above 2 mm they are accurate to the digital model (to the level I can measure at).   In the vertical axis (assumed from the stepping pattern) there is an approximate +0.1 mm (range +0.09 to + 0.12) increase. For my uses this is perfectly fine and is well inside Shapeways stated accuracy for the material (± 0.15mm, then ± 0.15% of longest axis). The biggest problem with Shapeways is that there is no consistency between printings of which axis which, that is one of the horizontal axis could be the vertical next time around. In this case it is not an issue but if it was something with ultra-fine detail and especially if it fitted together it might be a major one as one printing may be fine and the next printing problematic.
"blue520"
They seem to have maybe got a little better then, but you're right about the axis rotations, and that is generally why I find their repeatability to be rubbish.

Edit: but seemingly not much better just properly reread the ± 0.15mm, then ± 0.15% of longest axis properly. Initially I read that as just ± 0.15%.

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