skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


Search for: All records

Award ID contains: 2417962

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

  1. A multi-axis extrusion-based 3D printer was developed with two printheads configured orthogonally to add counter-gravity printing capability to conventional gantry-based fused deposition modeling. Process settings, including layer height and print speed, could be customized for each printhead. Printheads could be controlled independently to manufacture products with customized spatial properties. The CAD models of products were sliced into at least two segments to prevent collision between printheads and designs. The primary printhead needed to start to create a part of the design as a substrate for the secondary printhead, which began its action when enough space was provided for its motion. Subsequently, the primary printhead could continue constructing on a part built by the secondary printhead. 
    more » « less
    Free, publicly-accessible full text available January 29, 2026