Page 218 - Cam Design Handbook

THB7 8/15/03 1:58 PM Page 206

206 CAM DESIGN HANDBOOK

e
a m

a M
h 1

e opt

c opt c
h 2

FIGURE 7.14. Graphical determination of the optimum values of c and e.

50
45
40
Displacement (mm) 30
35

25
20
15
10
5
0
0 50 100 150 200 250 300 350 400
y (deg)
FIGURE 7.15. Prescribed displacement program.

placement, as shown in Fig. 7.15 and described in Table 7.1. Moreover, the displacement
of the follower has an amplitude of ±50mm, and the phase and return phases are produced
using a cycloidal motion (Angeles and Lopez-Cajún, 1991). For quick reference, the
normal cycloidal motion is given as
£
s y () = y -(12 p)sin 2 py, 01. (7.86)
y £
The parameters for the optimum cam with translating follower were found to be e opt =
-11.5525mm and c opt = 67.5378mm, which are graphically shown in Fig. 7.16.