Stereo lithography
Stereo lithographic 3D printers (known as SLAs or stereo
lithography apparatus) position a perforated platform just below the surface of a
vat of liquid photo curable polymer. A UV laser beam then traces the first slice of
an object on the surface of this liquid, causing a very thin layer of photopolymer to
harden. The perforated platform is then lowered very slightly and another slice is
traced out and hardened by the laser. Another slice is then created, and then
another, until a complete object has been printed and can be removed from the vat
of photopolymer, drained of excess liquid, and cured. we used this technology to make some projects.
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