MAS.863/4.140/6.9020

How To Make (almost) Anything

CBA Section - Week 11 Group Assignment

2025

Neilbot Site

Software

EE Design Files

MECHE

Creative

Individual

Edward

I worked on several components that are used in the final system. First, I helped with casting around 8 faces after Huanyu created the print and the mold, and also figuring out the exact formulation used for the Oomoo plastic cast material. Second, I also helped with designing and laser cutting a the adapter mount used to connect the servo pinion and rack to the outer shell and surface.

Something I learned is that working in a large team is challenging because of the different scheduling and coordination between different people. In this regard, thanks to the people taking charge in developing the core features and leading the communication amongst teams.

Tools I built that helped others are adapter mounts for connecting the rack and pinion to the outer shell unit and the outer surface. Since we had the outer shell and surface already cut out and we decided to change our servo design last minute, the original throughholes doesn't match the dimension of the new design and the original round rack has changed to square. Thus, I added an adapter plate with square hole to act as a guide for the rack, and I also added an adapter plate with compatible screw holes to connect the rack to the outer surface.

A skill that I acquired from others is how to set up laser cutting to cut 3mm acrylic materials used for the adapter mounts. I

Some of the failures I encountered was that I designed versions of PCB mount and servo-piston system that didn't get applied in our final version, which I think is completely fine. I learned a lot about using Fusion to create more complex designs. I also believe my design contributed more perspectives for the team and could work.

This is the scotch-yoke mechanism I explored:

This is the two versions of PCB mount design I explored and printed. My initial idea is for the mount to attach to the inner rods. The EE team then communicated that they want to design a hexagonal board, so I modified my design to a hexagonal solid with ball joints for more flexibility and a battery holder as well. But since we added inner faces, it's not really applicable anymore.