Code No: B0401
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
M. Tech II Semester Regular Examinations, September 2009
COMPUTER AIDED MANUFACTURING
( CAD/CAM )
Time: 3hours Max.Marks:60
Answer any FIVE questions
All questions carry equal marks
– – –
1.a] Define NC MACHINE TOOL AXIS SYSTEM for milling. 
b] Explain three basic types of motion control systems schematically. 
2. Derive transfer functions for open and closed loop control systems.
3.a] What are the design criteria to be used in designing CNC machine tools?
b] Briefly explain the ISO coding system used for carbide tool fits.
4.a] What are the distinct approaches of adaptive control systems? Explain them. 
b] What are the advantages of CNC. 
5. Write a manual part programming for the component shown in figure.
Tools used are
1. Centre drill 2. Twist drill φ 5mm 3. Twist drill φ 10mm
4. Slot drill φ 10mm.
Assume feed rate and speed to cut mild steel.
6. Write a computer aided part programming for the component shown in figure .
Assume feed rate and steel to cut mild steel.
7.a] What is part family? 
b] Explain any two part classification and coding systems. 
8.a] What are the various types of machine cells? 
b] What are the benefits of GT.