Document Type

Conference Paper

Publication Date


Publication Source

Proceedings of the 18th Solid Freeform Fabrication Symposium


The HiQ upgrade to the 3D Systems Vanguard selective laser sintering (SLS) machine incorporates a revised thermal calibration system and new control software. The paper compares the tensile modulus, tensile strength, elongation at break, flexural modulus, Izod impact resistance and microstructure of two batteries of standard specimens built from recycled Duraform PA (Nylon 12). The first set is built on a Vanguard HS system and the second on the same system with the HiQ upgrade installed. The upgrade reduces user intervention, decreases total build time and improves surface finish. However, using the default processing parameters, tensile, flexure and impact properties are all found to decline after the upgrade is installed.

Inclusive pages


Document Version

Published Version


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Permission documentation is on file.


University of Texas at Austin

Place of Publication

Austin, TX

Peer Reviewed