EnvisionTEC, a leading global manufacturer of desktop and full-production 3D printers and materials, is offering a substantial performance enhancement to the Perfactory 3D printer, now in its fourth generation.
A new custom LED light system will be offered across the company’s Perfactory 4 (P4) model lineup. In development for more than a year, the new LED system is more powerful and efficient than other light projector systems on the market. It offers a variety of benefits, such as lower operating costs and crisper black-white contrast between pixels, which means even better final part detail.
“This new LED system,” said CEO Al Siblani, “will offer our production 3D printer users much lower operating costs. Plus, the exceptional detail that our machines already produce will get even better because of the improved range of brightness from the LEDs.”
The P4 LED Standard XL offers a build envelope of 192 x 120 x 180 or 230 mm (7.6 x 4.7 x 7.09 or 9.06 in.) with XY accuracy of 100 μm (0.0039 in.). The P4 LED Mini offers XY resolution as low as 10 μm (0.0004 in) with an adjustable Z resolution ranging from 15 to 150 μm.
With the new custom LED system, the P4 line now comes standard with a powerful and cost-efficient light source, too. The average cost per hour of the P4’s outgoing ultra-high-performance (UHP) lamp, which uses high-pressure mercury gas to emit light, was $2.90, with an estimated life of 500 hours. By contrast, the new LED system will cost an average of $0.50 per hour, lasting an estimated 10,000 hours.
The beginning of DLP–an historical perspective
The original Perfactory 3D printer, a desktop model, was the first commercial DLP machine brought to market globally in 2002. DLP represented a major improvement over stereolithography (SL), which is the earliest form of vat photopolymerization, patented in the mid-1980s.
In SL, a UV laser beam draws out a cross section of a part in a vat of photopolymer resin, building it one layer at a time, until a final part is produced. One of the drawbacks of SL is that drawing out parts in this manner is time consuming. In early SL, the surface finish of parts also showed striations or stair-stepping between layers.
In 1996, a few years after earning his master’s degree in electrical and computer engineering from Wayne State University in Detroit, Al Siblani had a novel idea to use a high-definition theater-style projector system to expose one cross section of material at a time for rapid curing. Because projectors expose light in pixels, the brightness of each pixel could be controlled individually. That allowed for curing of each pixel to different depths or volumetric pixels, also known as voxels. The ability to control each voxel dramatically improved the accuracy and surface quality of 3D printed parts.
A desktop model, the original Perfactory was created by Siblani and Alexandr Shkolnik, EnvisionTEC’s chief technology officer. Their first working system was completed in 2000, with the launch of DLP, EnvisionTEC and the first Perfactory model in 2002. DLP was, and still is, regarded as a substantial advancement over common SL methods of 3D printing.
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