Page 193 - Cam Design Handbook
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THB7 8/15/03 1:58 PM Page 181
GEOMETRY OF PLANAR CAM PROFILES 181
de t = k e (7.10)
dl n
de n =- k e (7.11)
dl t
Now, let the position vector p be a function of a parameter q that, in general, is dif-
ferent from l. Differentiation of p with respect to q twice yields
y
G
Q
g
K
r
T
q
x
O
FIGURE 7.3. Visualization of the radius of curvature.
e t
P
e n
l
O
P l
O
FIGURE 7.4. Planar curve and the orthonormal
vectors e t and e n .
