| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
High Precision In-Situ Alignment Procedure in Dual Laser Powder Bed Fusion for Congruent Laser Operation |
| Author(s) |
Samuel Searle, Bey Vrancken |
| On-Site Speaker (Planned) |
Samuel Searle |
| Abstract Scope |
Congruent operation of multiple lasers on a single part in powder bed fusion necessitates the introduction of a hatching overlap to overcome potential mis-alignments between the laser scan-fields. These have previously shown to grow during long prints, creating the possibility for lack of fusion, poor geometrical tolerance and surface finish. In this work an in-situ alignment procedure that leverages a normal off-axis powder bed camera (Basler ace 2) is proposed. It can determine laser position down to less than 20 μm MSE by taking concepts from astronomical star centroiding. Prints were performed with the alignment process integrated directly into a Print Genius 150 dual laser printer, showing firsthand the simplicity and necessity of the proposed procedure. Furthermore, the procedure can also be adapted to accurately determine the perspective transform for monitoring cameras, removing the need for tedious checkerboard calibration and enabling a direct link to the laser coordinate system. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |