3D Print with Sand (2011) [video] (opens in new tab)

(youtube.com)

82 pointsmichaelxia11y ago9 comments

9 comments

Nice! Reminds me of this very relaxing video:

For context, Both Max and Marcus were studying at the Royal College of Art in London at the time. Not sure about the stool, but the Solar Sinter was Marcus' graduation project, and it was quite a hit when it went public.

agumonkey11y ago

Exactly what I thought I'd see.

brink11y ago

What's more interesting is how much energy there is in just that screen's surface area of sunlight. Enough to turn sand molten in under a second. Thinking of just how far away that is from the sun, and how much more surface area there is in a sphere with a radius that size..

huuu11y ago

A laser of 20-100 Watt is enough for Selected Laser Sintering.

So a square meter lens for the sun will give you more than ten times the power professional SLS printers are using.

That is indeed a lot.

Edit: here a nice answer about the heat generated: http://physics.stackexchange.com/a/103039

baddox11y ago

I believe you can get around a kilowatt per square meter, obviously depending on latitude, weather, and other factors. That lens looks about like a square meter.

seiferteric11y ago

*Kilowatt/m^2

1 more reply

IanCal11y ago

This is really cool, although leaving that size of fresnel lens uncovered makes me nervous.

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