Cardboard lends itself to different mechanisms compared to wood and acrylic. This mechanism combines aspects of the parallel linkage and eccentric cam. It also uses the springiness of cardboard as the returning force to bring the flag back down.

Learning Goals: 

  1. Understand the basics of the cam and linkage mechanism. 
  2. Apply your understanding of the mechanism to create a unique prototype. 

Part I: Template model

Using the template file provided, you will follow step-by-step video instructions on how to recreate the cam and linkage cardboard model. To complete the activity, you will need cardboard, scissors or exacto, a dowel or a pencil. 

Part II: Build your own version

Once you’ve completed the model, prototype at least 2 different ways to modify the pre existing elements to -

a) change the movement of the mechanism, 

b) customize components, 

c) introduce a new add-on feature, 

d) posit a novel application.

Part III: Document

Take photos of all your process and final project. Take at least two photos of your final prototype- one in an up position and a down position. (Pro tip: Keep the camera in the same position for each photo). Upload the images to to make a moving image. Post the images of your work in the response tab along with your answers to the following reflection questions:

  1. Did you find having a demo template useful? 
  2. If you were to repeat this exercise, what would you do differently v. same?
  3. Describe the parts you've modified from the original template. 
  4. Are there other mechanisms you'd like to learn how to make?