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10/25 Casting and Molding ## Week 6: In this week, we learned how to mill a pcb and how to solder components. # Class notes Show and Tell - Strapping Pin: voltage at boot is important, Pin 8,2,9 - LED can launch?? - ESC - Shape memory alloy kinda sux - servo motor with tendons - inventory of [material](http://inventory.fabcloud.io/?purpose=Molding%20and%20Casting) - algae gel for casting, skin safe - painting the mold with material first can get a smooth surface --- ## Idea - nudibranch, cell - play with opacity - Materiom sustainable material library - puzzle for roots to solve - make fins # Assignment group assignment: review the safety data sheets for each of your molding and casting materials, then make and compare test casts with each of them extra credit: try other molding and casting processes individual assignment: design a mold around the stock and tooling that you'll be using, mill it (rough cut + three-axis finish cut), and use it to cast parts extra credit: use more then two mold parts # 1) Milling  # 2) Casting Oomoo My first Oomoo cast was not ideal. It had some air bubbles.   I did a 2nd Oomoo cast. I brushed the surface and poured in Oomoo in layers. Between each layer I tried to get out the air bubbles by hammering the mold against a flat surface.  # 3) Casting Clear Epoxy  ## Next Steps --- # Resources - files - [positive pyramid](files/pyramid_small.stl) - [negative pyramid](files/pyramid.stl) --- ↳About