CNC Programming Course

Lesson 1 • Coordinate Systems and Axes

Explains Cartesian coordinates, machine zero, and work offsets. Correct axis orientation is prerequisite to writing any valid toolpath.

Lesson 2 • CNC Control Panels and Interfaces

Introduces operator panels, MDI mode, and display screens. Familiarity with controls enables safe machine interaction before full programs are run.

Lesson 3 • Shop Safety and Machine Protocols

Covers PPE requirements, lockout/tagout procedures, and safe startup sequences. Safety compliance is mandatory before any hands-on machine activity.

Lesson 4 • Machine Anatomy and Components

Identifies spindles, tool changers, worktables, and drive systems. Understanding hardware prevents programming errors caused by mechanical misinterpretation.

Lesson 1 • Geometric Dimensioning and Tolerancing Basics

Introduces GD&T symbols for flatness, perpendicularity, position, and runout. GD&T defines functional requirements that drive fixture and datum selection.

Lesson 2 • Feature Control Frames and Datums

Explains how to parse feature control frames and establish datum hierarchy. Correct datum selection directly determines workholding and probing strategy.

Lesson 3 • Reading Orthographic Projections

Teaches front, top, and side view relationships in third-angle projection. Accurate view interpretation prevents dimensional errors in programming.

Lesson 1 • Speeds, Feeds, and Depth of Cut

Calculates spindle RPM, feed rate, and axial/radial depth from material and tool data. These parameters govern tool life, cycle time, and part quality.

Lesson 2 • Cutting Tool Geometry and Materials

Covers rake angles, relief angles, and tool material grades from HSS to carbide. Tool geometry directly affects surface finish and tool life.

Lesson 3 • Workholding Devices and Fixturing

Introduces vises, chucks, collets, fixtures, and vacuum tables. Rigid, repeatable workholding is essential for dimensional accuracy and operator safety.

Lesson 4 • End Mills, Drills, and Boring Tools

Identifies flute count, helix angle, and application range for common rotating tools. Correct tool selection prevents chatter, breakage, and poor finish.

Lesson 1 • Tool Length and Diameter Compensation

Applies G43/G44 tool length offsets and G41/G42 cutter radius compensation. Compensation allows programs to reference part geometry rather than tool centre lines.

Lesson 2 • Motion G-Codes: Rapid and Linear Feed

Covers G00 rapid positioning and G01 linear interpolation with feed rate. These two codes form the basis of all straight-line cutting motion.

Lesson 3 • Program Structure and Syntax

Explains program number, sequence numbers, block format, and end-of-program codes. Correct structure prevents control alarms and unpredictable behaviour.

Lesson 4 • Circular Interpolation and Helical Motion

Programs G02 and G03 arcs using I, J, K or R format and adds Z for helical entry. Arc programming enables contour milling and thread milling.

Lesson 1 • Hole Pattern Programming Techniques

Uses bolt circle patterns, linear arrays, and mirror functions to position canned cycles. Pattern programming eliminates repetitive coordinate entry.

Lesson 2 • Tapping and Boring Cycles

Covers G84 rigid tapping, G85 boring feed-out, and G76 fine boring cycles. Rigid tapping synchronises spindle and feed to produce accurate threads.

Lesson 3 • Turning Canned Cycles

Programs G71 rough turning, G72 facing, and G70 finish pass cycles for lathes. Turning cycles automate multi-pass stock removal from a single profile definition.

Lesson 4 • Subprograms and Macro Calls

Creates M98/M99 subprogram structures and passes arguments for repeated geometry. Subprograms reduce program length and centralise geometry changes.

Lesson 1 • Workpiece Setup and Datum Finding

Uses edge finders, dial indicators, and probes to locate part datums on the machine. Accurate datum location is the foundation of dimensional accuracy.

Lesson 2 • Offset Adjustment and In-Process Control

Adjusts wear offsets based on measured part dimensions to maintain tolerance. Systematic offset management sustains quality across long production runs.

Lesson 3 • On-Machine Probing Routines

Programs automatic probing cycles for bore, boss, web, and pocket centre finding. Probing reduces setup time and eliminates operator measurement error.

Lesson 4 • Tool Length Measurement Methods

Covers tool presetter, tool touch-off block, and on-machine probing for length offsets. Accurate tool length data prevents Z-axis crashes and depth errors.

Lesson 1 • 3D Surface and Solid Machining

Programs parallel, scallop, pencil, and rest-machining strategies for complex surfaces. 3D strategies are required for moulds, dies, and organic shapes.

Lesson 2 • Post-Processing and Code Output

Selects and configures post-processors to output controller-specific G-code. Correct post selection ensures machine-ready code without manual editing.

Lesson 3 • 2D Milling Operations in CAM

Configures contour, pocket, facing, and drilling operations on 2D geometry. 2D operations cover the majority of prismatic part features.

Lesson 4 • CAM Workflow and Model Import

Covers CAD-to-CAM file transfer, model repair, and stock definition setup. A clean model and accurate stock are prerequisites for valid toolpath generation.

Lesson 1 • Program Verification and Prove-Out

Executes single-block dry runs, feed rate override testing, and first-article inspection. Structured prove-out prevents crashes and confirms dimensional compliance.

Lesson 2 • Cycle Time Analysis and Reduction

Identifies non-cutting time, optimises rapid moves, and sequences operations for minimum time. Cycle time reduction directly improves machine utilisation and profitability.

Lesson 3 • High-Speed Machining Strategies

Applies trochoidal milling, constant chip load, and smooth corner transitions for HSM. High-speed strategies extend tool life and reduce cycle time in hard materials.

Lesson 4 • Parametric and Macro Programming

Uses variables, arithmetic, logic, and loops to create flexible, reusable programs. Macro programming eliminates repetitive code and enables family-of-parts programming.