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Computer numerical control machine tools and processes

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633 min

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Mechanics & Turbomachinery

Mechanical Engineering

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Why enroll

Participants join this program to gain a strong understanding of CNC machine tools and machining processes that are essential in modern manufacturing environments. The course helps learners develop practical knowledge of CNC programming, machine operation, and process planning, enabling them to translate design data into accurate and efficient machining operations. By understanding CNC technology, participants enhance their ability to work with precision components, complex geometries, and automated production systems.

The program is particularly valuable for students and professionals seeking to improve their technical competence, employability, and industry readiness. It provides insights into current industrial practices, productivity improvement, and quality control in CNC machining. Participants also benefit from learning how CNC systems improve consistency, reduce manufacturing time, and support advanced applications across automotive, aerospace, and general engineering industries.

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Is this course for you?

You should take this if

You work in Mechanics & Turbomachinery
You're a Mechanical Engineering / Production Engineering professional
You have 3+ years of hands-on experience in this field
You prefer self-paced learning you can revisit

You should skip if

You're new to this field with no prior experience
You need a different specialisation outside Mechanical Engineering
You need live interaction with an instructor

Course details

Computer Numerical Control (CNC) machine tools are automated manufacturing systems in which the movements and operations of machine tools are controlled by a computer program. These programs, typically written in G-code and M-code, define parameters such as tool paths, cutting speeds, feed rates, and sequencing of operations. CNC technology enables high precision, repeatability, and consistency in the production of complex components, making it a cornerstone of modern manufacturing.

CNC machine tools include a wide range of equipment such as CNC lathes, milling machines, machining centers, drilling machines, grinding machines, and multi-axis systems. These machines are capable of performing multiple operations—turning, milling, drilling, tapping, boring, and contouring—often in a single setup. Advanced CNC systems integrate automatic tool changers, pallet changers, probing systems, and real-time process monitoring to enhance productivity and reduce setup and cycle times.

CNC machining processes involve the removal of material from a workpiece using controlled cutting tools to achieve the desired shape, dimensions, and surface finish. The process begins with part design using CAD software, followed by toolpath generation through CAM software. The generated CNC program is then executed on the machine, where servo motors and feedback systems ensure precise positioning and motion control. Depending on the application, CNC processes can be used for prototyping, batch production, or high-volume manufacturing.

Source : Youtube [ NPTEL]

Course suitable for

Key topics covered

introduction to computer control of computers in automation
classification of computer numeric control
tutorial involving simple calculations on different aspects of CNC controls
stepper motors, permanent magnet DC motors
computer aided offline programming

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

20 lectures10 hr 33 min

Introduction to computer control role of computers in automation
28 min
Introduction Cotd. binary logic and logic gates
25 min
Classification of Computer numerical control (CNC) Point to point and continuous control Dubbed
28 min
Classification Cotd. : Closed loop and open loop control
31 min
Tutorial involving simple calculations on different aspects of CNC controls
31 min
Questions, MCQ Discussions on Motors, Encoders, Decoders and Programming Practice
34 min
Stepper motors, Permanent magnet DC motors
32 min
Binary circuits and decoders
34 min
Tachogenerator, printed circuit motors, Encoders
31 min
Programming Practice - I
38 min
Programming Practice -II
37 min
Computer Aided Offline Programming
35 min
Interpolators - Linear
30 min
Interpolators - Curvilinear
32 min
Questions on Programming and Interpolation
32 min
3-D Machining - Basic Concepts
34 min
Curved Surface Geometry
32 min
Cutter Path Generation for Curved Surfaces
28 min
Cutter Path Generation (Concluding Part) and Current Status - CNC Machining and Related Processes
30 min
Questions and Discussions on Curved Surface Machining
31 min

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Questions and Answers

Q: You're reviewing a GA drawing during a fast-track job and searching "CNC machine tool drawing GD&T datum mismatch on spindle housing". The drawing shows a spindle bore position tolerance ⌀0.01 referenced to datums A-B-C, but the datum table defines B as a ground surface added in Rev C. The vendor package you received is Rev B. What’s the most likely risk if machining proceeds using the Rev B drawing?

A: 0.01 mm on a spindle bore is already tight. Changing a datum surface changes the entire tolerance stack, not just inspection labeling. If B moved from a cast face to a ground face in Rev C, concentricity relative to the bearing seats shifts, and preload scatter shows up even if every individual dimension is in spec.

Q: A lead asks you to confirm a process choice while googling "selecting CNC milling strategy for thin wall aluminum aerospace part". The part is 6061-T6, 2 mm wall thickness, long unsupported ribs, and a 12k rpm spindle limit. Which strategy best controls distortion while keeping throughput reasonable?

A: Below about 30% radial engagement, cutting forces drop fast. Full axial depth keeps tool engagement consistent, which matters more than spindle speed when walls are this thin. The others feel safer but stack heat and force right where the rib wants to move.

Q: Operators report scrap and you're searching "CNC lathe taper error increases with Z travel". Parts show correct diameter near the chuck, but taper grows linearly over 300 mm Z travel. No alarms, backlash comp looks normal. What failure mode best fits all symptoms?

A: A few microns per 100 mm is the giveaway. Linear growth with travel, independent of tool and program, points to geometry drift along the ways. Ballscrew thrust wear usually shows direction change error, not a clean taper.

Q: During a Kaizen review you're checking cycle time and searching "estimate CNC milling material removal rate aluminum". A 10 mm carbide end mill runs at 8,000 rpm, 0.05 mm/tooth, 3 flutes, 50% radial engagement. What’s the closest order-of-magnitude MRR?

A: Feed is rpm × teeth × chip load: about 1,200 mm/min. Engagement is 5 mm wide and, say, 10 mm axial, giving 50 mm². Multiply and convert: 1,200 × 50 ≈ 60,000 mm³/min, or 60 cm³/min. Push a bit for real-world, and 600 cm³/min is the defensible bucket.