Introduction to Numerical Control - Computer Aided Manufacturing – Components of CNC
system – Types of CNC systems – Open loop and closed loop control systems, Drives and
Controls – Interpolators; CNC machine tools - Constructional features – Design considerations –
Tooling for CNC.
CNC part programming – Manual and computer assisted part programming; CAD/CAM
Programmable Logic Controllers (PLC) – Hardware, Ladder logic programming of PLCs using
basic functions – Timers and counters – Advanced programming with control and arithmetic
Introduction to Automation – Goals of Automation, levels of automation, Hard Vs Soft
Automation, Computer Aided manufacturing (CAM).
Numerical Control - Introduction, Role of NC / CNC in CAM, Applications of NC / CNC,
Benefits of NC / CNC, Limitations of CNC.
Basic Components of CNC system - Part programming, Machine control unit, Machine tool - Historical developments and their role in control of machine tools, Classification of NC / CNC
systems - Based on type of Control (PTP\C\L), method of programming, type of architecture - Hardwired / Softwired / Open.
Machine Control Unit - Data processing Unit - elements and their functions - Interpolators and
Interpolators - Types and Stages of Interpolation, Principles of interpolation - Techniques
employed for Interpolation Scheme, Requirements of Interpolation algorithms, Interpolation
schemes - Stairs approximation, Digital Differential Analyser, Direct function calculation; DDA
- Hardware and Software; Software Interpolators.
Sequential controllers - Concepts, Relay ladder diagrams and their development.
Programmable Logic Controllers - Elements of Hardware and Software, Methods of
programming - Ladder Logic Programmes (LAD), Function Chart (FC), Statement List (STL) -
Program scanning and its execution.
Programming with Basic functions - Internal Relays, Timers, and Counters - different types and
programming examples - Advanced functions and their applications.
Part programming - Introduction; Part Program and its elements, Methods of Programming - Manual and Computer Assited Part programming - Custom Macro (Parametric Programming),
APT and its variations, Concepts of CAM - Tool path generation and control methods.
Machine Tool - Componets of CNC machine tool, Drives and controls, Automatic Tool
Changers, Automatic Pallet Changers, tool offsets and work offsets, high speed and precision
Koren Y, Computer Control of Manufacturing systems, McGraw Hill, 1986.
Reinbold U, Blume C and Dilmann R, Computer Integrated Mfg. Technology & Systems, Marcel Dekker, 1985.
Petruzella F D, Programmable Logic Controllers, McGraw Hill, 1989.
John W. - Programmable Controllers - Principles and Applications - Merrill Publ.Co, New York, 1980.
Madison J, CNC machining Handbook, Industrial Press Inc., 1996.
Barry Leatham - Jones, Introductions to Computer Numerical Control, Pitman, London - John willey & Sons, 1986.
Roger S. Pressman & John E. Williams, Numerical Control and Computer Aided Manufacturing, John Willey.
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