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# Is shapesway charging for empty space?

Is shapesway charging for empty space? [message #58194] Fri, 07 December 2012 20:36 UTC
I am designing a tube and according to Shapeways it is 30.4W x 11.6D x 11.6H = 333cm(cubed).

The thickness of the tube is 2mm.

So this tube is hollow which would give me a Volume of 14.5cm(cubed).

Shapeways estimate: \$8 x 333 = \$2664

My estimate: \$8 x 14.5 = \$166

For stainless steel at \$8 this is quite a difference.

Seems your equations are based on outside parameter only? Is this automated computer error or is this just how the 3D printing machine works?

Why is the price for a solid tube the same for a hollow tube???

Shouldn't you be charged by material used not for air space? I am using less material so doesn't the 3D printer finish quicker? OR does it not matter with the 3D printer because is takes the same amount of time to create a hollow or solid object?

Also I am being charged by the widest dimension which is 11.6D...my part only has the Diameter for 20% of the part....the rest of the part is at 6cm D. So the volume of the part is charged not by actual material but the outer most dimension?

or am I not creating the object correctly for the computer to pick up the hollow shape?

Just would like to know how the machine works so I can create with it. But at this juncture this makes my project undo-able otherwise I would be ordering 10 right now.

Thanks

 Is shapesway charging for empty space? By: ExoFlow on Fri, 07 December 2012 20:36 UTC Re: Is shapesway charging for empty space? By: Youknowwho4eva on Fri, 07 December 2012 20:42 UTC Re: Is shapesway charging for empty space? By: ExoFlow on Fri, 07 December 2012 20:58 UTC Re: Is shapesway charging for empty space? By: Youknowwho4eva on Fri, 07 December 2012 21:19 UTC Re: Is shapesway charging for empty space? By: ExoFlow on Fri, 07 December 2012 23:06 UTC Re: Is shapesway charging for empty space? By: JACANT on Sat, 08 December 2012 00:14 UTC Re: Is shapesway charging for empty space? By: stonysmith on Sat, 08 December 2012 01:15 UTC Re: Is shapesway charging for empty space? By: Fredd on Sat, 08 December 2012 02:23 UTC Re: Is shapesway charging for empty space? By: ExoFlow on Sat, 08 December 2012 03:08 UTC Re: Is shapesway charging for empty space? By: JACANT on Sat, 08 December 2012 14:27 UTC Re: Is shapesway charging for empty space? By: ExoFlow on Mon, 10 December 2012 05:34 UTC Re: Is shapesway charging for empty space? By: psalmu on Fri, 07 December 2012 23:58 UTC Re: Is shapesway charging for empty space? By: Fredd on Sat, 08 December 2012 02:27 UTC
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