Contributors - 3D printing: - Photos: - Writeup:

This week, our group assignment was to test the design rules for the 3D printers. The EECS lab has (at the moment) 2 Sindoh printers and 1 Prusa printer. In the pictures shown, the yellow parts are made on the Sindoh and the black parts are made on the Prusa. We printed all the test files from the site. This included overhang and clearance supports, angle, overhang, bridging, wall thickness, dimensions, anisotropy, surface finish, and infill (0%, 15%, 50%, and 100%). Each test is discussed below.

Overhang Supports: We discovered that 0.1mm was on the boundary of when the print would start having issues. Going past this generally led to prints that fell apart.

Clearance:

Angles: For the Prusa, 10-30 degrees was generally passable, with 40+ degrees being ideal. On the Sindoh, 30+ was ideal.

Bridging:

Wall Thickness:

Dimensions:

Anisotropy:

Surface Finish:

Infill: As part of this test, we learned how to turn off the top layer of printing within the slicer software. We forgot to do this for one of the tests and had to bandsaw off the top, which ended up melting the plastic and making it more challenging to see the infill pattern.