8.3 Design Process
Our design process began with a thorough analysis of the problem, including reviewing the instruction document, examining previous projects, and asking questions to the TAs and professor for clarity. We then brainstormed individually, generating 2–3 ideas each, which we compiled, discussed, and refined through sketches and diagrams. After presenting these to the TAs and professor, we received critical feedback and decided to pivot based on what had and hadn’t worked in past projects.
We ultimately chose a bowling mechanism, as it met the project requirements and offered an engaging, interactive experience. Prototyping began with a basic motion design on MotionGen, starting with sliders and later transitioning to a four-bar linkage system composed of three binary and one ternary link. We decided to switch from sliders to a ternary link because the sliders would introduce unnecessary friction that would impede the bowling motion.
Once finalized, we created a CAD model incorporating an excavator-style release bucket and physically built the prototype using laser-cut 6mm plywood and 3D-printed parts, with 3mm bolts and nuts for the joints. We also designed and cut a plywood bowling lane. Testing focused on motion smoothness, release mechanism performance, ball speed, lane quality, and motor strength, with feedback from instructors guiding improvements.
For the final build, we enhanced joint quality using 3mm bearings and axles, redesigned the release to impart realistic spin, refined the ternary link, and used 6mm acrylic for durability and finish. The lane was upgraded with an acrylic top for smoother ball motion, and electronics were enclosed in a custom “Decepticon”-themed acrylic case for added style. We concluded by presenting the project at demo day, where the bowling game drew attention and excitement from many attendees.