## 2 Materials and Methods
### Build Layout
#### 2.3.3 Controlling Slice Distribution
where \(\overrightarrow{\text{p}}\) is the vector from the center of the powder bed to the point, \(\overrightarrow{\text{1}}\) is the vector from the laser origin to the point, and \(\parallel\overrightarrow{\text{p}}\parallel\) and \(\parallel\overrightarrow{\text{1}}\parallel\) are the magnitudes of the respective vectors. This adjustment assumes that the last mirror is installed 600 mm above the powder bed and precisely in the center, ultimately adjusting the orientation by 13.1 degrees. Table 3 tabulates the positions and re-orientations. The four empty volumes indicated by green circles in the interior of the build space in Figure 7 are large enough to fit six samples of CA_F pointing in six orthogonal directions each. All specimens of the constellation are located 26.5 mm away from a shared center point to uphold the 10 mm safe zone. This setup is demonstrated in Figure 8b and allows for the investigation of the variations across the build space and between the different builds for a limited number of orientations. This constellation is inserted three of the four volumes, leaving the fourth spot available for a hollow box used to collect powder samples from inside the build. The position of the box is rotated counterclockwise by one-step for each part layer, as displayed in Figure 9.  
However, the design and constellations are not dense enough to have much of an impact on the slice distribution; hence, yet another artifact was introduced to the layout. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Center x** & **Center y** & **Rotation A** & **Rotation B** \\ \hline
120 & 40 & \(-\)12.2251 & 4.763642 \\
220 & 40 & 0 & 0 \\
300 & 120 & \(-\)4.76364 & \(-\)12.2251 \\
300 & 220 & 0 & 0 \\
220 & 300 & 12.22512 & \(-\)4.76364 \\
120 & 300 & 0 & 0 \\
40 & 220 & 4.763642 & 12.22512 \\
40 & 120 & 0 & 0 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Location and re-orientation of specimen CA_F at edge positions. Rotations A and B signify the counterclockwise rotation about the x- and y-axis, respectively. Figure 9: Locations for powder sample boxes. Roman numerals (I–IV) indicate the positions of specimens 150–153. (**a**) Front view; (**b**) top view showing the labeling of the boxes. At this point, the only viable spaces left in the build volume are the corners of Figure 7, i.e., each of the five layers of main specimens. In order to maximize the utility of the space, an artifact was designed in Microsoft 3D Builder based on the shape of the available volume. This design had the potential to add further value to the experiment, and shapes were, therefore, added to the planar faces of the workpiece. First, the linear artifact LA from ISO/ASTM 52902:2019 [38] is imported and used as a pattern to create imprints in the design. The pattern leaves notches in the back of the specimen of certain intervals along all three axes and allows for measuring the dimensional accuracy on the corners of the build envelope. The remaining area was utilized to add cylinders of 8 and 15 mm in diameter, completing the design in Figure 10. These specimens are inserted at the four z-levels indicated in Figure 7 with four specimens on each level--one in each corner rotated, so the large planar surfaces are parallel with the walls of the build chamber, only leaving the safe distance of 20 mm. The final layout includes a total of 169 specimens per build: 45 replications of the main specimen, of which 37 replicates are part of the main study and the remaining eight are anchor specimens, 104 replicates of CA_F, of which 72 are part of constellations, and 32 replicates are located along the edges of the build space, 16 duplicates of the corner artifacts and four hollow boxes for powder samples. When the layout design was completed, the Magics \"fix\" function was utilized to automatically detect and repair STL file errors, such as inverted normals, holes, and intersecting triangles.