This document discusses CNC (Computer Numerical Controlled) lathe and milling machine operations. It explains that CNC machines require preparing a computer program to manufacture parts using mental skills rather than physical skills. The document provides examples of motion statements for linear, circular and tool movements used in CNC programming for lathes and milling machines. An exercise on CNC lathe and milling machine is assigned.

2. Lathe Operations

3. Lathe Operations

4. Lathe Operations

5. Lathe Operations

6. CNC Lathe

7. CNC Machines & Programming
• CNC stands for “Computer Numerically Controlled”.
• In using CNC machines one has to prepare a computer
program to manufacture the part.
• In operating CNC machines you need more of mental
skills than physical skills.
• All of you have to do an exercise on
• CNC Lathe (Demo)
• CNC Milling (Individual Exercise)

8. Milling Machine
Demo

9. Milling Process

10. Milling Process

11. Exercise

12. 40 mm
50 mm
6 mm

13. Motion Statements
G00 Linear Movement (rapid)
G01 Linear Movement (feed)
G02 Circular Movement (cw feed)
G03 Circular Movement (ccw feed)
CNC Programming

14. Milling Machine Axes

15. Milling Machine Axes

16. G00 Linear Movement (rapid)
CNC Programming
(0, 0)
10 24
X
Y
60
55
G00 X55 Y60

17. G02 Circular Movement (Clockwise)
CNC Programming
(0, 0)
10
24
X
Y
G02 X34 Y0I0 J-24
G02 X34 Y0 CR24

18. Tool Diameter = 6 mm

21. 5

22. 5

24. x
y
x
z

26. G01 Z-8

27. G01 Z+3

28. G00 X 10 Y -10

29. G01 Z-3

30. G01 Y -30

31. G01 X 32

32. G02 X 62 Y-30 I15 J0
G02 X 62 Y-30 CR 15

33. 40 mm
50 mm
5
20
30
5
11

36. CNC System

37. CNC Programming