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DIY High Resolution DLP 3D Printer

| 3D Printers, Stereolithography | July 16, 2013

Diy DLP 3D Printer Results

The DIY DLP printer produces excellent results

Instructibles user Tristram Budel decided that he needed to build his own 3D printer so that he could use it for his own projects to create the most accurate prints possible.

He considered making a FDM (Fused Deposition Modelling) printer, ala RepRap, but found that the all worked in the same way and produced about the same results. On the other hand, stereo lithography 3D printers produce high quality results but there are very few DIY machines available.

After deciding that the world needs more open-source photo lithography 3D printers so that it would spark community development in this type of machine.

Budel’s printers works by using a DLP projector to expose each layer of resin so that it cures on layer at a time. A layer resolution of 100nm (0.1mm) is possible using a suitable DLP projector.

Diy DLP Projector

A DLP projector is used to provide the light beam that cures the resin

  • high UV content (determines if the projector works to cure the resin)
  • high light intensity (shorter cure time)
  • high contrast ratio (gives a higher resolution with less light contamination)
  • high resolution (results in a smaller feature size)

After deciding upon an Acer 7077365 Acer H6510BD DLP FHD 1080p, with a 1920×1080 HD pixel resolution, it was determined that the projector should be placed at a 90 degree angle to the build surface, and using a mirror to direct the beam up to the build surface from below.

DLP  Printer Schematic

A mirror is used to direct the beam of light to the build surface

The aluminum frame, projector and build surface is contained in an enclosure which keeps out dust and stray light. The DLP 3D printer produces excellent prints at a 0.1mm layer that takes only 4 seconds to cure. This equates to a 50mm per hour print speed.

Finished DIY 3D DLP Printer

The finished DLP 3D printer, minus it's enclosure

The printer is still a prototype but development is continuing on a more advanced version and Budel even hopes that he might even launch it as a Kickstarter project. The plans and instructions for this DLP printer can be found in instructables.

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