Is it just me, or are the parts REALLY expensive to produce?
I downloaded the plug in, and created some simple models of cubes (they don't get any simpler than that!) The cubes were 10 mm, 20 mm, 50 mm and 100 mm side. The cheapest material I can find is White SL Accra 25 SLA process - basic finish. The prices I was quoted are as follows:
Part - Side (cm) - Volume (cc) - Quoted Price - Price per cc
10_mm_Cube.stl - 1 - 1 - $54.28 - $54.28
20_mm_Cube.stl - 2 - 8 - $59.50 - $7.44
50_mm_Cube.stl - 5 - 125 - $255.90 - $2.05
100_mm_Cube.stl - 10 - 1000 - $3,063.10 - $3.06
(OK, I understand that they must use some sort of "magic formula" that means large parts are relatively cheaper than small parts, both volume and surface area are taken into account, etc.)
If I order all 4 parts together, I am offered a bulk discount of $686.55, for a total price of $2,746.22, which works out at $2.42 per cc for the 1,134 cc combined order. Assuming the material has a bulk density of around 1 gram per cc, this works out at around $2,400 per kg!!!!!
Compare this with the pricing for other on-line 3D printing services; e.g. Shapeways can supply basic models from $0.75 per cc ("Full Color Sandstone"
http://www.shapeways.com/materials/fullcolor ) - and this rate applies for SMALL models. They quoted me $715.42 to make the 100 mm cube in their "White Strong & Flexible" material
Again, I understand that different rapid prototyping processes can have hugely different cost structures, but I don't think I will be making much use of this service! Heck, for an outlay of not much more than $1,000, you can buy a fully assembled 3D printed (or build one yourself for about half that much) AND several kilograms of feedstock to make these models yourself!