<h3> Additive Manufacturing technologies</h3> <p> <ul> <li>Fused deposition modeling or FDM (spooled filament), e.g., <a href='https://www.prusa3d.com/'>Prusa</a>, <a href='https://www.flashforge.com/product-detail/flashforge-creator-3-fdm-3d-printer'>FlashForge</a>. </li> <li>Selective laser sintering (powder).</li> <li>Stereolithography (UV-cured resin), e.g., <a href='https://formlabs.com/'>Formlabs.</a></li> </ul> </p> <h3> SC 102 3D Printing Protocols: </h3> <p> <ul> <li>You don’t need to sign in or have a buddy if you’re just starting or retrieving a 3D print. </li> <li>You may use the shared SD cards and adapters in the lab. Files will be deleted periodically. When preparing a gcode file, the file name should include your first name so we know who is printing what. </li> <li>If a print is obviously failing, you may stop it. You may also wish to clear the print bed and restart the print. </li> <li>Never walk away from a broken printer. If a printer is damaged, please try to repair it yourself. If you don’t know how, please ask someone on staff to help. </li> <li>You may remove finished prints from printbeds, and set them on the table nearby. </li> <li>Academic use only. No tchotchkes, no production runs. </li> <li>Long prints (more than 4 hours) should be avoided during peak demand times (~10am-10pm). </li> <li>Watch the first layer to make sure the print starts successfully. Afterwards it’s fine to leave printers unattended. </li> <li>No experimental filaments (without special permission). PLA only. </li> </ul> </p> <p>Parts to characterize printer perforance: <!-- (from <a href='http://academy.cba.mit.edu/classes/scanning_printing/index.html'>How to Make)</a>: --> </p> <img src='http://academy.cba.mit.edu/classes/scanning_printing/designrules.jpg' alt='printer characterization'> <h3>Applications and limitations</h3> <p> 1. Parts for devices: <br> <img width="400" src="./part1.jpg" alt="part1"> <img width="400" src="./part2.jpg" alt="part2"> <img width="400" src="./ext3.jpg" alt="ext3"> <img width="400" src="./ext4.jpg" alt="ext4"> <img width="400" src="./part3.jpg" alt="part3"> <img width="400" src="./part4.jpg" alt="part4"> <img width="400" src="./pulley2.jpg" alt="pulley2"> <br> </p> <p> 2. Making things additively that cannot easily be made subtractively: <br> <img width="400" src="./balljoint.jpg" alt="ext1"> </p> <p> 3. Making things additively that <b>could</b> easily be made subtractively: <br> <img width="400" src="./mold1.jpg" alt="mold1"> <img width="400" src="./mold2.jpg" alt="mold2"> </p> <p> 4. Educational and art objects: <br> Frogs, scanned with photogrammetry, 3D printed, and painted 2018-2020 by Mara Laslo and collaborators at Natural History Museum. <br> <img width="400" src="./3D_frogs.jpg" alt="froggies"> <img width="400" src="./scanned.jpg" alt="balljoint"> <br> </p> ### Limitations - Dimensional limitations - Time limitations - Material limitations ### 3D Modelling Software - <a href='https://en.wikipedia.org/wiki/STL_(file_format)'>Stl files</a> - Modeling software. Fusion and many others. - <a href='https://github.com/hanskellner/Fusion360Image2Surface'>convert Bitmap to stl via Fusion 360. ### 3D Scanning Software - Structured light <a href='https://www.3dsystems.com/3d-scanners/sense-scanner'>Sense Scanner.</a> - Artek Spider high resolution scans <a href='https://www.artec3d.com/portable-3d-scanners/artec-spider?utm_source=google&utm_medium=cpc&utm_campaign=9317869662&utm_term=%2Bartec%20%2Bspider||kwd-57671099541&utm_content=99820306731||&keyword=%2Bartec%20%2Bspider&gclid=EAIaIQobChMIodqigory5wIVxJyzCh1UIARKEAAYASAAEgLpvPD_BwE'> Link to website.</a> - Photogrammetry: <a href='https://alicevision.org/'>Alicevision </a> and <a href='https://github.com/alicevision/meshroom'>Meshroom.</a> ### Preparing to print Slicers - <a href='https://www.flashforge.com/product-detail/FlashPrint-slicer-for-flashforge-fdm-3d-printers'>FlashPrint</a>: Use for multi-material prints with the FlashForge printer. - <a href='https://ultimaker.com/software/ultimaker-cura'>Cura</a>: Use for Ultimaker and others - <a href='https://www.prusa3d.com/drivers/'>Prusa</a>: Recommended for Prusa printers - <a href='https://formlabs.com/software/'>Formlabs "Preform"</a> Browser-based slicers (use with caution) - <a href='https://grid.space/kiri/'>Kiri Moto</a> - <a href='https://www.astroprint.com/'>Astroprint</a> - <a href='https://icesl.loria.fr/slicecrafter/'>Slicecrafter</a> G-code - <a href='./sample.gcode'>Sample g-code</a> - <a href='https://reprap.org/wiki/G-code'>G-code wiki</a>