CNC PROGRAMMING
About Course
The CNC Programming (Manual Programming for Lathe & Milling using FANUC Language) course is designed to give students a complete understanding of Computer Numerical Control (CNC) machine operations and manual part programming. This course focuses on programming lathe and milling machines using FANUC controller codes (G & M codes) — the most widely used CNC language in the manufacturing industry.
Learners will study both theoretical & simulation based machine practice, including coordinate systems, tool offsets, cutting parameters, and code optimization. Through real part simulation sessions, students will learn how to write, verify, and execute CNC programs for precision manufacturing. By the end of the course, learners will be confident in developing and running manual CNC programs independently on FANUC-based machines.
Course Objectives
Pre-requisites
This course is ideal for learners who have:
Basic understanding of machining operations and machine tools.
Knowledge of technical drawing or manufacturing fundamentals is helpful.
Duration
Duration: 2 months
Class Duration: 8 Hours per day
Includes recorded sessions, software tutorials, and project guidance
What You'll Learn
By completing this course, you’ll be able to:
Understand CNC machine structure, components, and working principles.
Write manual G & M code programs for both lathe and milling machines.
Set up tool offsets, coordinate systems, and reference points.
Execute, test, and troubleshoot CNC programs safely.
Perform program verification and dry run checks in simulations.
Apply machining knowledge for industrial production and precision part manufacturing.
Who Can Join
This course is ideal for:
ITI, Diploma, and B.Tech (Mechanical) students interested in CNC manufacturing.
Machine operators or fresh graduates looking to upgrade to CNC programming roles.
Professionals and entrepreneurs aiming to enter or expand in precision engineering and production sectors.
Training Phases
Objective: Learn the basic principles, importance, and applications of CNC systems.
Includes:
Evolution of NC → CNC → Automation systems
CNC definition, purpose & industrial applications
CNC vs conventional machines
CNC system structure (bed, spindle, control, feedback)
Simulation Practice:
Identifying parts of CNC machines in simulator
Objective: Understand machine axis directions, coordinate systems, and motion control.
Includes:
Axis notation (X, Y, Z; U, W)
Positive and negative movement conventions
Absolute vs Incremental coordinates
Graph plotting (P0, P1, etc.)
FANUC system orientation
Simulation Practice:
Plot coordinates graphically and observe direction flow
Objective: Learn to operate CNC control panel, modes, and system navigation.
Includes:
FANUC control interface layout
MDI, jog, home, and reference modes
Machine zero return (G28)
Feed rate, spindle control, and emergency stop
Simulation Practice:
Home return and toolpath jogging
Objective: Write structured programs using FANUC word address format.
Includes:
Program structure (O, N, G, X, Y, Z, F, S, T, M)
Header, body, and end blocks
Safety codes (G40, G49, G80, G90, G21, G17)
Sequencing and numbering
Simulation Practice:
Write and simulate a blank program for structure validation
Objective: Master movement and control commands for milling and turning.
Includes:
G00, G01, G02, G03, G17–G19, G20–G21
M03–M09, M30, M06 (spindle, coolant, and program control)
G90/G91 absolute/incremental modes
G94/G95 feed modes
Simulation Practice:
Linear vs circular interpolation path simulation
Objective: Learn how to set up work coordinates and tool offsets.
Includes:
Work offsets (G54–G59)
Tool length offsets (G43/G44/G49)
Cutter compensation (G40/G41/G42)
Speed (S) and feed (F) setup concepts
Simulation Practice:
Apply offsets and verify path corrections
Objective: Understand milling machine parts and basic setup.
Includes:
VMC & HMC construction
Tool holding and spindle orientation
Fixture setup and safety interlocks
Home reference (G28)
Simulation Practice:
Explore VMC machine layout and axis control
Objective: Write programs for milling operations and simulate part cutting.
Includes:
Side facing, chamfer cutting, pocketing, multi-pocket operations
G00, G01, G02, G03, G17, G18, G19
M98 (subprogram) and L (loop count)
Simulation Practice:
Multi-pass toolpath visualization and contour simulation
Objective: Learn and implement drilling and tapping operations.
Includes:
Canned cycles: G81, G83, G73, G85, G86, G84
Parameters: X, Y, Z, R, Q, P, F
Canned cycle cancellation (G80)
Simulation Practice:
Multi-hole drilling and tapping simulation
Objective: Develop modular, reusable programs for repetitive operations.
Includes:
Subprogram creation using M98 & M99
Looping with L counts
Modular workflow example: pocket repetition
Simulation Practice:
Create a reusable subprogram for repeated drill patterns
Objective: Combine multiple operations into one complete program.
Includes:
Advanced cycles: G76 fine boring, G80 cancel
Tool changes (M06 T01–T02)
Coolant simulation (M08, M09)
Simulation Practice:
Full part simulation: face → drill → pocket → chamfer
Objective: Apply all learned milling skills in one integrated project.
Includes:
Write and simulate full component program:
Facing → Drilling → Pocket → Chamfer → Radius operationValidate G/M code accuracy, subprogram logic, and tool offsets.
Objective: Learn lathe construction and coordinate system.
Includes:
HTC/VTC structures
Spindle axis (Z) and tool movement (X/Z)
Tool turret and offset settings
Lathe terminology: DOC, RPM, feed, OD, ID
Simulation Practice:
Observe coordinate direction and tool approach
Objective: Write basic lathe programs for facing and turning.
Includes:
G00, G01, G02, G03
Incremental coordinates (U/W method)
Tool offset numbering (T0101, T0202, etc.)
Spindle and coolant control (M03, M04, M09)
Simulation Practice:
Run facing and step turning simulation
Objective: Master multi-pass and complex cycle operations.
Includes:
G70 Finishing, G71 Roughing, G72 Facing, G73 Pattern Repeat
G74 Drilling, G75 Grooving, G76 Thread Cutting
Subprogram loops for repetitive patterns
Simulation Practice:
Rough + finish cycle simulation with threading
Objective: Apply offset and nose radius compensation logic.
Includes:
Tool offset logic and numbering
Tool nose radius adjustment
Work offset (G28 U0.0 W0.0)
Compensation error prevention
Simulation Practice:
Observe nose radius offset variation in simulation
Objective: Write and simulate a complete turning part program.
Includes:
Facing → Turning → Grooving → Threading → Drilling → Tapping
Apply subprogram calls
Validate final geometry and toolpath flow
Objective: Learn to identify, correct, and optimize CNC codes.
Includes:
Common alarms and error handling
Code verification and dry-run inspection
Cycle time reduction techniques
Code documentation standards
Simulation Practice:
Identify & fix syntax errors; compare before/after optimization
Objective: Demonstrate full understanding of both Milling & Lathe through integrated simulation.
Includes:
Complete project coding (Milling + Lathe)
Toolpath verification & feed optimization
Final report preparation with screenshots