UNIT 9 - CAM DESIGN DRAWINGS

I. OBJECTIVES - Upon the completion of this step, the student should be able to:

A. Describe the basic principle of a "Cam";
B. Describe the basic components of a "Cam";
C. List and discuss the differences between the two major kinds of "Cams";
D. List and describe the basic types of "Followers";
E. Define "Cam" terminology;
F. List and describe the four major types of "Cam Motion";
G. Prepare "Displacement Diagrams" for the four major types of "Cams";
H. Explain the purpose of a "Timing Diagram";
I. Prepare layout drawings of selected types of "Cams";
J. Apply appropriate dimensioning techniques to "Cam" layout drawings;

II. REFERENCES - The following list contains textbooks, reference books, pamphlets, audio-visuals, and hand-out sheets that will help you learn about this step:

A. Goetsch, Nelson, Chalk, pp. 521-529.
B. Jensen & Helsel, pp. 514-535.
C. Spence, pp. 480-489.
D. Spence & Atkins, pp. 502-514.

III. ASSIGNMENTS - The following list of activities and problems will help you understand the objectives for this step and provide practical applications to help you acquire the skills needed to continue with the next step:

A. Review and answer the Study Questions for Step 9.

B. Complete a Division Sheet for Step 9. Include the title of the step, step number, your name, and draw a "Displacement Diagram" for a cam with a 2" rise and a uniform velocity. See Sample.

C. Prepare a "Displacement Diagram" and layout a cam according to the directions in your test book for Problem # 15-1A and #15-1B (Page 531). Download the exercise from the server, and complete the drawing using your VectorWorks software on an 11x17 ("B") sized page, and submit for grading. (25 pts)

D. Prepare a "Displacement Diagram" and layout a cam according to the directions in your test book for Problem # 15-3A and #15-3B (Page 532). Download the exercise from the server, and complete the drawing using your VectorWorks software on an 11x17 ("B") sized page, and submit for grading. (25 pts)

E. Prepare a "Displacement Diagram" and layout a cam according to the directions in your test book for Problem # 15-7A and #15-7B (Page 534). Download the exercise from the server, and complete the drawing using your VectorWorks software on an 11x17 ("B") sized page, and submit for grading. (25 pts)