Engineering Graphics and Design

SPRING 2017

 

Clock Project

2017

Use AutoCAD and Autodesk Inventor to design an escapement wheel and pendulum for a model clock, use shop tools to build clock, and analyze the timing.

1/3

Finished Product!

 

Robot Contest

2017

Design and build a robot that can navigate a given arena and accomplish a given goal using DC motors, solenoids, and fabrication tools

Our goal was to create a robot that could navigate this arena, transport as many billiard balls as possible to the triangle-shaped plate, and accomplish all these in less than 60 seconds.

Challenges

WHAT WE ENCOUNTERED

  1. Interacting with dynamic features of the arena to collect billiard balls.

  2. Manipulating the smooth billiard balls and transporting them across the arena.

  3. Lifting and placing groups of heavy billiard balls.

  4. Only given low power motors, custom fabricated transmissions and drive trains, and limited to four control inputs.

My Tasks

WHAT I DID

  1. Worked with a team of three engineers to design and construct a robot, with the goal of navigating around a predesigned arena, from concept-generated designs

  2. Performed risk reduction and rapid prototyping to test feasibility of different transmissions, using the limited DC motors given. Solved the problem by implementing a friction drive mechanism, enabling maximum torque to power the wheels, increasing the robot’s speed and navigation

  3. Designed transmission in AutoCAD; 3D modeling and renderings of the entire robot in Inventor

  4. Utilized milling machines, power saw, drills, soldering iron, laser cutter, and 3D printers to manufacture and assemble said robot

Everything starts with a hand-drawn sketch! This lets me solidify the main parts required to build the robot and imagine how all the parts can work together as a whole. My job was to figure out on how the robot moves (powering the wheels) without damaging the other parts.

Initially, I attempted to attach the DC motor directly into the wheel. Unfortunately, it could not give the amount of force needed. The robot would not move at all, because there is not enough force to overcome the static friction between the wheel and the surface. So, I had to change tactics quickly and look at another option: the friction drive.

Risk Reduction Prototype

Observing a working friction drive mechanism. I took note on the main parts I had to design on our own robot. 

Using a laser cutter to shape the base plate of the robot from acrylic

Assembling all the manufactured parts

Designing a prototype on

Autodesk Inventor

Building the robot's body

Testing the friction drive

Finished Product!

Simulation

The Robot in Action

robot in action!

FINAL PRESENTATION