CNC Turning and Milling Course

Lesson 1 • Machine Anatomy and Components

Identifies structural and functional parts of CNC lathes and mills. Provides the vocabulary needed to read manuals and follow instructions accurately.

Lesson 2 • Shop Safety and Hazard Control

Establishes mandatory safety practices for CNC environments. Directly reduces injury risk before any hands-on machine operation begins.

Lesson 3 • Introduction to CNC Technology

Covers the history, principles, and industrial role of CNC machining. Establishes context for all subsequent turning and milling operations.

Lesson 4 • Measurement and Inspection Tools

Introduces precision measuring instruments used throughout machining. Accurate measurement underpins every quality check in later chapters.

Lesson 1 • Cartesian Coordinate System for CNC

Explains X, Y, Z axes and their orientation on lathes and mills. Correct axis understanding is prerequisite to writing any valid CNC program.

Lesson 2 • Writing Basic Milling Programs

Extends programming skills to three-axis mill operations. Students produce programs for face milling, contouring, and simple pocket roughing.

Lesson 3 • G-Code and M-Code Fundamentals

Introduces preparatory and miscellaneous code functions used in standard CNC programs. Students decode existing programs and identify each command's purpose.

Lesson 4 • Setting Work and Tool Offsets

Covers procedures for establishing part zero and entering tool length and radius offsets. Correct offset entry prevents crashes and dimensional errors.

Lesson 1 • Milling Cutter Types and Applications

Covers end mills, face mills, drills, and specialty cutters for CNC milling. Correct cutter selection reduces cycle time and improves dimensional accuracy.

Lesson 2 • Cutting Tool Geometry and Materials

Explains rake, relief, and cutting edge angles alongside carbide, HSS, and ceramic grades. Tool geometry directly determines surface finish and tool life.

Lesson 3 • Workholding for CNC Milling

Covers vises, clamps, fixtures, and vacuum tables for milling setups. Proper fixturing prevents movement that causes scrap and tool breakage.

Lesson 4 • Workholding for CNC Turning

Presents chucks, collets, and between-centres setups for lathe workholding. Secure, accurate workholding is essential for repeatable part dimensions.

Lesson 1 • Cutting Parameters by Material

Provides parameter guidelines for steel, aluminium, stainless, titanium, and plastics. Material-specific data prevents tool failure and ensures acceptable surface finish.

Lesson 2 • Depth of Cut and Material Removal Rate

Covers axial and radial depth of cut selection and material removal rate calculation. Students optimise roughing passes to maximise efficiency without overloading tools.

Lesson 3 • Cutting Speed and Spindle RPM

Derives spindle RPM from surface cutting speed and cutter diameter. Correct RPM prevents premature tool failure and poor surface finish.

Lesson 4 • Coolant and Cutting Fluid Application

Explains flood, mist, and through-tool coolant strategies and their effect on tool life. Correct coolant application reduces heat and improves chip evacuation.

Lesson 1 • Grooving and Parting Operations

Teaches groove geometry programming and part-off procedures on CNC lathes. Correct feed and depth control prevents tool breakage during narrow-width cuts.

Lesson 2 • Taper and Contour Turning

Programs angular tapers and curved profiles using linear and circular interpolation. Contour turning expands part complexity beyond simple cylindrical features.

Lesson 3 • Facing and Straight Turning

Covers facing to establish a datum surface and turning to achieve target diameters. These foundational operations appear in nearly every turned-part program.

Lesson 4 • CNC Thread Turning

Programs single-point threading cycles for external and internal threads. Students produce threads to standard pitch specifications and verify with gauges.

Lesson 1 • Profile and Contour Milling

Programs 2D profiles and contours using cutter radius compensation. Accurate contouring requires correct compensation direction and approach strategy.

Lesson 2 • Multi-Setup and Fixture Offset Use

Teaches programming across multiple work offsets G54–G59 for multi-face and multi-part setups. Efficient offset management reduces setup time and programming errors.

Lesson 3 • Pocket and Slot Milling

Covers rectangular, circular, and irregular pocket strategies including roughing and finishing. Pocket programming requires careful entry method and floor finish planning.

Lesson 4 • Hole-Making Operations on the Mill

Programs drilling, reaming, tapping, and boring cycles for accurate hole features. Hole quality depends on correct cycle selection, peck depth, and tool geometry.

Lesson 1 • Turning Canned Cycles

Covers G71 roughing, G72 facing, and G70 finishing cycles for lathe programming. Canned cycles automate multi-pass strategies with minimal code.

Lesson 2 • Bolt-Hole and Pattern Cycles

Programs bolt-hole circles and linear hole arrays using parametric or canned methods. Pattern cycles eliminate manual coordinate calculation for repeated features.

Lesson 3 • Parametric and Variable Programming

Introduces user variables and conditional logic for flexible, reusable programs. Variable programming enables one program to machine a family of similar parts.

Lesson 4 • Subprograms and Macro Calls

Teaches subprogram structure and call commands for repeated geometry blocks. Subprograms enforce consistency and simplify edits across multi-operation programs.

Lesson 1 • Dimensional Error Diagnosis

Identifies root causes of oversize, undersize, taper, and out-of-round conditions. Systematic diagnosis guides corrective offset and parameter adjustments.

Lesson 2 • Tool Life Management and Monitoring

Implements tool life counters, wear offsets, and predictive replacement schedules. Proactive tool management prevents unexpected breakage and unplanned downtime.

Lesson 3 • Statistical Process Control Basics

Introduces control charts and process capability indices for CNC production. SPC data reveals trends before parts go out of tolerance.

Lesson 4 • Cycle Time Reduction Strategies

Analyses program structure and cutting parameters to shorten cycle time. Reduced cycle time increases throughput without sacrificing part quality.