Stereolithography (SLA) is a 3D printing technique that uses a laser to cure liquid resin layer by layer. It works by filling a vat with resin and using a laser beam directed by mirrors to cure the resin into solid plastic shapes according to a digital file. The build platform then lowers into the vat to begin the next layer, and struts may be printed to support overhanging areas before being removed after completion. SLA provides high resolution prints from a digital file using ultraviolet light to solidify liquid resin.

1. 3D Printing
Shakti Nadar
SLA

2. 3D Printing
laying down successive layers to create 3D
solid object from a digital file
(Additive Manufacturing)
2

3. 3D Printing
Types
 Fused Deposition Modeling
 Stereo Lithography Apparatus
 Selective Laser Sintering
 Direct Metal Laser Sintering
 Laminated Object Manufacturing
3

4. SLA
Stereo Lithography Apparatus
4
( Optical Fabrication)

5. SLA
 Input :
 Resin (UV Curable)
 Digital file (STL format)
 Printer:
 Laser source
 Scanning Mirror
 Build platform
 Build Tank or Vat
5

6. SLA - Process
 Vat is filled with resin
 Build platform is positioned either above
or below the vat based on placement of
Light source
 UV Laser passes to resin via scanning
mirror in X & Y axis
 Exposure to the ultraviolet laser light cures
and solidifies the pattern
 When one layer is completed, platform
moves in Z direction to form next layer 6

7. 7

8. 8
SLA - Output

9. Struts
9

10. Struts
 Overhangs need support
 Struts acts as Scaffolding
 Struts are printed along with the object
 Removed after the build is complete
 Mechanical removal
10

11. Thank You
11