1. CASE STUDY:
Different types of indexing mechanism are shown below:
Indexing Indexing Indexing Indexing
mechanism 1: mechanism 2: mechanism 3: mechanism 4:
1. Give a short description of each mechanism.
2. Provide a comparison table for each mechanism by indicating at least 5 major advantages and disadvantages of each
one. Follow the format shown below:
1. Design a cam with an in-line roller follower for
operating the exhaust valve of an engine, as shown
in the figure. The data are as follows:
Cam lift = 40 mm during 90o of cam rotation
with Simple Harmonic Motion (SHM).
Dwell for the next 30o
During the next 60o of cam rotation, the
follower returns to original position with
Cycloidal Motion.
Dwell during the remaining 180o.
The radius of the base circle of the cam is 40 mm.
Reference: Mechanism and Machine Theory by Ashok G.
Ambekar © 2007 by Prentice-Hall of India Private Limited,
New Delhi.