# Chapter9-Cams and Followers¶

## Ex2-pg247¶

In [3]:
##CHAPTER 9 ILLUSRTATION 2 PAGE NO 247
##TITLE:CAMS AND FOLLOWERS
import math
pi=3.141
s=4.##         follower movement in cm
theta=60.##    cam rotation in degrees
thetaR=90.##....angle with which it reaches its original position in degrees
THETAR=90.*pi/180##   angle with which it reaches its original position in rad
N=300.##   speed in rpm
Vo=pi*w*s/2./THETA##   Maximum velocity of follower during outstroke in cm/s
Vr=pi*w*s/2./THETAR## Maximum velocity of follower during return stroke in cm/s
Fo=pi**2.*w**2.*s/2./THETA**2./100.##Maximum acceleration of follower during outstroke in m/s**2
Fr=pi**2.*w**2.*s/2./THETAR**2/100.##Maximum acceleration of follower during return stroke in m/s**2
print'%s %.1f %s %.1f %s '%('Maximum acceleration of follower during outstroke =',Fo,' m/s**2''Maximum acceleration of follower during return stroke= ',Fr,' m/s**2')

Maximum acceleration of follower during outstroke = 177.6  m/s**2Maximum acceleration of follower during return stroke=  78.9  m/s**2


## Ex3-pg249¶

In [2]:
##CHAPTER 9 ILLUSRTATION 3 PAGE NO 249
##TITLE:CAMS AND FOLLOWERS
import math
pi=3.141
s=5.##         follower movement in cm
theta=120.##    cam rotation in degrees
thetaR=60.##....angle with which it reaches its original position in degrees
THETAR=60.*pi/180.##   angle with which it reaches its original position in rad
N=100.##   speed in rpm
Vo=pi*w*s/2./THETA##   Maximum velocity of follower during outstroke in cm/s
Vr=pi*w*s/2./THETAR## Maximum velocity of follower during return stroke in cm/s
Fo=pi**2.*w**2.*s/2./THETA**2./100.##Maximum acceleration of follower during outstroke in m/s**2
Fr=pi**2*w**2.*s/2./THETAR**2/100.##Maximum acceleration of follower during return stroke in m/s**2
print'%s %.1f %s %.1f %s '%('Maximum acceleration of follower during outstroke =',Fo,' m/s**2''Maximum acceleration of follower during return stroke= ',Fr,' m/s**2')

Maximum acceleration of follower during outstroke = 6.2  m/s**2Maximum acceleration of follower during return stroke=  24.7  m/s**2


## Ex5-pg252¶

In [1]:
##CHAPTER 9 ILLUSRTATION 5 PAGE NO 252
##TITLE:CAMS AND FOLLOWERS
import math
pi=3.141
N=1000.##    speed of cam in rpm

Maximum acceleration of follower during outstroke = 25000.0  m/s**2Maximum acceleration of follower during return stroke=  44444.4  m/s**2