Maricopa Community Colleges  DFT215   19962-20086 
Official Course Description: MCCCD Approval: 07/22/08
DFT215 19962-20086 L+L 3 Credit(s) 6 Period(s)
Mechanisms
Coverage of mechanisms as applied to the field of drafting. Includes displacement and velocity, slidercrank and cam mechanisms, rolling contacts, gear trains, instant centers and miscellaneous mechanisms.
Prerequisites: (DFT107 and DFT112) or equivalent.
Go to Competencies    Go to Outline
 
MCCCD Official Course Competencies:
 
DFT215   19962-20086 Mechanisms
1. Define a vector quantity. (I, II)
2. Resolve vector problems using various vector solutions. (II - IV)
3. Determine linear and angular velocities using vector analysis. (II - VI)
4. Solve problems using methods of graphical integration and differentiation. (VI - VIII)
5. Design cam profiles. (IX, X)
6. Analyze gear trains using vector analysis. (X)
Go to Description    Go to top of Competencies
 
MCCCD Official Course Outline:
 
DFT215   19962-20086 Mechanisms
    I. Terminology
      II. Coplanar Vectors and Vector Equations
          A. Composition
          B. Resolution
          C. Vector sense notation
        III. Motion Concepts
            A. Definitions
            B. Analytical solutions
              1. Linear velocity and acceleration formulas
              2. Angular velocity and acceleration formulas
          IV. Kinematic Drafting
              A. Conventional symbols
              B. Techniques
              C. Kinematics representation (skeleton drawings)
              D. Displacement drawings
              E. Displacement diagrams
            V. Centros (Instantaneous Centers)
              VI. Velocities in Mechanisms
                  A. Centro method
                  B. Parallel-line method
                  C. Component method
                  D. Relative velocity method
                VII. Acceleration in Mechanisms
                  VIII. Motion Curves - Graphical Differentiation
                      A. Time-displacement curves
                      B. Time-acceleration curves
                    IX. Cams
                        A. Displacement diagrams
                        B. Cam profiles
                        C. Cam follower motion
                          1. Uniform velocity
                          2. Simple harmonic motion
                          3. Uniformly accelerated motion
                          4. Modified uniform-velocity
                          5. Cycloidal
                      X. Gear Trains
                          A. Velocity ratio
                          B. Types
                            1. Compound
                            2. Reverted
                            3. Epicyclic
                      Go to Description    Go to top of Competencies    Go to top of Outline