<topbar style="display:none;"> <item><a href="../index.html">Home</a></item> <item><a href="../about_me/about_me.html">About</a></item> </topbar> <!-- This is a comment, it is ignored by the compiler/interpreter --> <style> h0 { font-family:; font-size: 30px; color: #414040; margin-top: 50px; margin-bottom: 6px; word-spacing: 5px; } </style> ##week4: 3d printing <br> ###Group assignment: Design rule of 3D printing <br> ####Objective <br> To understand the length limit that a 3D printer can handle without support structure. ####Metrics <br> * 3D printer: Original Prusa i3 MK3. * Type of the filament: PLA * Software and setting: PrusaSlicer was used. The nozzle speed was set to 0.30mm/s (draft). * Design: I designed five bridges with different lengths with an increment of 20mm. Namely, 80, 100, 120, 140, and 160mm while keeping other geometry (= thickness and height) the same. The design image is attached below. <br><img src="./bridge.png" alt="laser_module" width="500"/> ####Results <br> <br><img src="./bridge_1.JPG" alt="laser_parts" width="500"/> <br> <br><img src="./bridge_sag.JPG" alt="laser_parts" width="500"/><br> Note: The shortest one is 80mm long and the largest 160mm, with a 20mm-increment in between. As you can see in the photo above, surprisingly each of the five bridges was connected at least on its top, and the level of the beam was kept flat as designed. On the other hand, there was a sag on the bottom part of the bridge. The longer the bridge becomes, the looser it becomes. It was an interesting design rule experiment as the longest bridge does not necessarily mean it was a complete failure - you can add a different flexibility feature or sense of touch by using this trait as seen in the video below. <iframe width="560" height="315" src="https://www.youtube.com/embed/9f8zM78DbqY" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>