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Stereolithography!

Stereolithography!. By Jake Stevens. What it is. Stereolithography is a rapid manufacturing and rapid prototyping technology for producing parts with high accuracy and good surface finish. A device that performs stereolithography is called an SLA or Stereolithography Apparatus. How it works .

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Stereolithography!

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  1. Stereolithography! By Jake Stevens

  2. What it is Stereolithography is a rapid manufacturing and rapid prototyping technology for producing parts with high accuracy and good surface finish. A device that performs stereolithography is called an SLA or Stereolithography Apparatus.

  3. How it works Stereolithography is an additive process which uses vat of liquid UV-curable photopolymer "resin" and a UV laser to build parts a layer at a time. Exposure to the light cures the pattern traced on the resin and adheres it to the layer below.

  4. How it works cont. It then moves down by 0.05 mm to 0.15 mm. The part cross section is recoated with fresh material, and the process repeats.

  5. Materials The only material that a SLA uses is a photo-curable resin. However, there are many different types of resin available.

  6. Cost The resin can cost anywhere from $300 to $800 per gallon. A SLA can cost $100,000 to $400,000.

  7. Speed This process can take anywhere from a few hours to more than a day.

  8. Random Facts Most SLA machines can produce parts with a maximum size of 20” x 20” x 24”. Stereolithography was the first rapid prototyping process that became widely available to consumers and is still the most common process used in rapid prototyping today.

  9. Benefits of SLA Highly detailed parts with a smooth finish Very accurate tolerances even down to thousandths of an inch Large array of materials ranging in rigidity, clarity, color, detail and temperature deflection Capability to use parts for short run low temperature tooling

  10. More Benefits!!!! Can be used for light duty function Variety of finishing capabilities such as painting or plating for show presentation or demos Rapid turnaround times of most parts typically within a few working days

  11. Definitions Additive-Adding material to an object usually layer by layer. Can be used as a synonym for rapid prototyping. Subtractive-removing away of materials such as with mills, lathes, and drills Compressive-compress large files to make them smaller. Slice File-Slice Files are a unique type of file; they contain (or reference) a single piece of sample data, have a list of markers denoting "slices" of the sample, and also have a set of parameters such as tempo and time signature.

  12. Sources http://www.artcorp.com/stereolithography.html http://rapid-prototyping.harvest-tech.com/stereolithography.htm http://wikipedia.org/

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