Pitch Circle Problem 8.17 Construct the profile of a disk cam that ...

Total Follow Travel
Use the follower diagram subdivisions of 20˚. Next draw the cam pitch circle and lay off radial
lines in the counterclockwise direction. The follower displacements can then be taken directly from
the displacement diagram. Draw the pitch curve. Draw the cam follower circles on the pitch curve.
Use a smooth curve to draw the cam profile tangent to the follower circles.
6
5
4
Prime Curve
7
3
8
2
9
Prime Circle
Base Circle
1
0
10
Cam
16
17
15
11
12 13
14
Problem 8.18
Accurately sketch one half of the cam profile (stations 0-6) for the cam follower, base circle, and
displacement diagram given below. The base circle diameter is 1.2 in.
1.0
Base Circle
0 1 2 3 4 5 6 7
11 10 9 8
Station Point
Numbers
- 362 -