MAE341 Spring 2021
Cam Design Project - Individual (150 pts.)
Deadline: March 12th, 2021 at 11:59pm
(submission should be made through Gradescope)
Description:
The goal of this project is for you to design a plate cam with a translating roller follower, that has
a positive offset of 1in. with the following motion characteristics:
• The plate cam is to rotate clockwise at a constant 400rpm rotational speed.
• The follower starts from a dwell, and starts to rise at 00 to a total lift of 2.5in. And then it
returns with a deceleration first. During the next 1in. of its return stroke, it must have a
constant velocity of 40in./sec. Then it continues to return to a dwell. This dwell lasts for
the last 060 of the cam rotation.

(1) Using standard motions (e.g., uniform; simple harmonic; cycloidal; 8th order polynomial, etc.),
suggest specific standard motions for each segment for this high speed operation, and
determine the corresponding lifts and cam rotation angles for each segment of the displacement
diagram. Determine ( )y y = for each segment of the displacement diagram. Plot the
displacement diagram ( ( )y y = vs.  ), the first order kinematic coefficient diagram ( 'y vs.
 ) and the second order kinematic diagram ( ''y vs.  ).

(2) The roller is to have a diameter of 1in. Determine the minimum required prime circle radius if
the pressure angle is not to exceed 030 and then choose an acceptable prime circle radius for
the cam.

(3) Use the analytical approach to determine the cam profile layout, implement your equations in
a computer program (e.g., MATLAB), and plot the cam profile.






Deliverables:
You should individually submit a report for this project to Gradescope by the deadline that is
specified. Hand written work can be used for part(s) of your report, provided that it is legible, neat,
professional, and well organized. You will receive zero credit if your work cannot be read and
understood.
Your report should include
• A brief description of the project (5 points)
• Your complete work for part (1) including (90 points)
o Rough sketches of the y, y’, and y’’ diagrams that you used to determine the
standard motion types
o All the equations used to determine the lifts (L’s) and corresponding cam angles
(β’s), with any intermediate steps used leading to those equations and brief
explanations
o Standard motions (e.g. H-1, C-2, etc.) suggested for each segment on the
displacement diagram with their corresponding lifts (L’s) and cam angles (β’s)
o Final form of displacement diagram equations for each segment of the displacement
diagram ( )y y =
o Plots of y, y’, y’’, each as a function of θ
• Your complete work for part (2) including (15 points)
o Determination of the minimum required prime circle radius (show your work and
final result)
o Prime circle radius selected for the cam
o Note: you will receive zero credit for this part if the work for determining the
minimum required prime circle radius is not shown
• Your complete work for part (3) including (40 points)
o List all equations used to determine the cam profile
o Your computer code for implementing the equations and plotting the cam profile
o A plot of the cam profile
o Note: you will receive zero credit for this part if the correct approach, i.e., analytical
approach is not used for this part

Honor Code:
Please note that this is an individual project. Your work and computer code should be generated
by you and your submission should represent your own understanding and efforts and may not
represent the work of others. Any violations of the ASU Academic Integrity Policy will result in
a failing grade in this class and these violations will be reported to the Dean’s Office.



































































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