Jonathan Tagoe

For this design and manufacturing course, me and 5 other students were put on a team to come up with a design for a functional yo-yo that we had to make in lab and assemble on our own. We decided on a frozen yogurt design and got to splitting up the work by component.

I handled the design for the injection molded chocolate sauce. Using AutoDesk Fusion, I modeled it as an offset of the frozen yogurt component and used an extruded cut to give it an organic, amorphous look that real life… Mehr zeigen

For this design and manufacturing course, me and 5 other students were put on a team to come up with a design for a functional yo-yo that we had to make in lab and assemble on our own. We decided on a frozen yogurt design and got to splitting up the work by component.

I handled the design for the injection molded chocolate sauce. Using AutoDesk Fusion, I modeled it as an offset of the frozen yogurt component and used an extruded cut to give it an organic, amorphous look that real life chocolate sauce has. I then used the same program to make the core and cavity components of the mold, using part files of the blanks provided by the class.

Once each side of the mold was completed, I began working on the CAM programs for each side. The core was machined on a ProtoTrak mill, while the core was machined on a Hass in order to save time, due to its complexity

I designed multiple iterations of the molds as the component it was attached to (the yogurt piece) changed. With each subsequent iteration, I decreased the angle of the chocolate in order to adjust its fit. At the same time, since we were not the only team using the lab, I also tuned the CAM program to reduce the total machining time of the core toolpath by 40% so we could do rapid prototyping.

With each iteration, we ran the mold on the injection molding machine to figure out the best parameters to reduce flash and get the perfect part (holding time, shot size, etc.) By the end, when we had to do the production runs of 100 components (2 for each yo-yo), the chocolate fit perfectly, and we managed to get the yo-yo's assembled for presentation! Weniger anzeigen

From the start of the class to the end of the competition, I kept my design notebook with me whenever I came up with a new modification or reached a milestone with the current iteration of the bot. Before I began getting to work physically, I made sure to design all of the components, sub-assemblies and final assemblies in Solidworks to ensure that my designs were physically possible. I also utilized the drawings feature, where I kept fully dimensioned schematics to assist with my… Mehr zeigen

From the start of the class to the end of the competition, I kept my design notebook with me whenever I came up with a new modification or reached a milestone with the current iteration of the bot. Before I began getting to work physically, I made sure to design all of the components, sub-assemblies and final assemblies in Solidworks to ensure that my designs were physically possible. I also utilized the drawings feature, where I kept fully dimensioned schematics to assist with my fabrication.

I made use of the various tools within the machine lab to build each component of my bot. I used horizontal bandsaws, drill presses, sheet metal punches and presses to form the metal, and mills/ & lathes to cut aluminum and delrin components into the proper shape. We were also given access to 3D printers and a waterjet cutter, which I used for motor mounts and adapters.

I had various mechanisms designed for the robot - a rack and pinion lift system, a chain-sprocket drive-train and a motor driven arm. In order to make the integration of such mechanisms as seamless as possible, I made sure to measure twice and keep my tolerances tight enough to avoid necessary friction. I used calipers and the precise measuring tools attached to the mills to accomplish this.

In order to control the robot, we were given a specially made Arduino board, which we programmed ourselves. I had experience programming robots from high school as well as for class and personal projects. The real challenge was coming up with a control scheme that was simple enough to actually use, but effective for the competition.

Throughout the course, we had access to the competition field to test the iterations of our robots. There were a variety of tasks like traversing ramps, collecting objects and pulling levers. In order to optimize the design, I sat down to model the physics of each tasks and applied them as design requirements for each subsequent iteration. Weniger anzeigen

This was my senior capstone project in high school, where we had to completely design, prototype, manufacture, test and redesign an entire 3 lb Battlebot for competition at the end of the year.

I served as the lead designer for my team. I handled all operations on Solidworks - making individual components, assembly and drawings including fixtures we configured ourselves - as well as creating the Mastercam toolpaths for manufacturing. I also tackled part of the post processing for… Mehr zeigen

This was my senior capstone project in high school, where we had to completely design, prototype, manufacture, test and redesign an entire 3 lb Battlebot for competition at the end of the year.

I served as the lead designer for my team. I handled all operations on Solidworks - making individual components, assembly and drawings including fixtures we configured ourselves - as well as creating the Mastercam toolpaths for manufacturing. I also tackled part of the post processing for aluminum components, design for electrical components, and physical assembly.

We went with a simple wedge design to start and by the end, had prototyped 5 functional 3lb iterations, first made out of 3D-printed ABS plastic and then machined aluminum, and eventually moved towards titanium. With each iteration, we ran Finite Element Analysis tests to figure out the effectiveness of the design against expected impacts like getting rammed on the side or a hammer strike on the front side.

By the end, we compiled every step of the engineering design process as well as the projected budget and improvements for future in a presentation to professional engineers to review our work. Weniger anzeigen