Lesson 1Basic CNC programme structure and common G-code/M-code elements for verificationThis part introduces the basic structure of CNC programmes, essential G and M codes, and reading blocks, comments, and tool calls, enabling operators to check programmes for safety, proper movement, and compatibility with the setup.
Program header, safety lines, and commentsTool call, spindle speed, and coolant commandsLinear and circular motion G-code essentialsWork coordinate systems and tool length offsetsCommon M codes for spindle, coolant, and program endLesson 2Steps for handling unusual conditions during pre-start (tagging, reporting, isolating, starting maintenance)This part outlines correct responses to odd pre-start findings, including tagging, isolating, notifying key staff, and beginning maintenance, while avoiding unsafe shortcuts or unauthorised fixes.
Recognizing critical versus minor abnormalitiesApplying tags and documenting out-of-service statusIsolating energy sources when hazards are presentNotifying supervisors and maintenance promptlyRecording issues in logs or digital systemsLesson 3Required PPE for CNC tasks and reasons (eye gear, ear protection, cut-proof gloves, aprons, safety boots)This part lists essential PPE for CNC milling, explains why each is vital, and covers selection, inspection, and proper use, connecting risks like flying chips, noise, and sharp bits to specific gear.
Eye and face protection for chips and coolant splashHearing protection selection for shop noise levelsCut-resistant gloves for handling tools and stockProtective clothing, aprons, and sleeves near rotating partsSafety footwear for impact and slip protectionLesson 4Standard lockout/tagout steps for CNC machines (isolation, checking, recording)This part describes usual lockout/tagout processes for CNC machines, covering energy isolation, release, verification, and records, highlighting teamwork with maintenance and adherence to site rules.
Identifying all CNC energy sources and pointsShutting down machine using normal stop sequenceApplying locks, tags, and group lockout devicesVerifying zero energy and tryout of controlsRestoring energy and removing locks safelyLesson 5CNC milling machine parts and control panel (spindle, axis motors, tool changer, coolant, PLC/HMI)This part explains key CNC milling parts and the control panel, illustrating how spindle, axes, tool changer, coolant, PLC, and HMI work together, and how operators safely use screens, buttons, and modes.
Spindle assembly, drive, and speed controlLinear axes, ball screws, and feedback systemsAutomatic tool changer and tool magazine basicsCoolant delivery, chip evacuation, and guardingHMI screens, soft keys, and mode selectionPLC safety logic, interlocks, and status lightsLesson 6Machine-specific risks (entanglement, flying chips, tool failure, coolant contact, electrical dangers)This part examines CNC-specific risks like entanglement, flying chips, tool breaks, coolant exposure, and electrical hazards, linking each to prevention steps and safe practices.
Entanglement risks from rotating tools and partsFlying chips and high-velocity particle hazardsTool breakage causes and containment methodsCoolant mist, skin contact, and ventilation needsElectrical shock and arc risks around CNC cabinetsLesson 7Daily and shift checks for CNC (tool wear, spindle wobble, coolant level, chip removal)This part specifies daily and shift checks like tool wear, spindle runout, coolant levels, and chip clearance, demonstrating how regular inspections avoid breakdowns, enhance finishes, and ensure steady output.
Visual inspection of guards, doors, and panelsChecking tool wear, chipping, and pull stud conditionMonitoring spindle noise, heat, and basic runoutCoolant level, concentration, and contamination checksChip conveyor, augers, and filter cleanlinessLesson 8Checking guards, interlocks, and emergency stops on CNC machinesThis part concentrates on verifying guards, interlocks, and emergency stops, detailing test methods, pass criteria, and records so operators confirm safety features work before and during operation.
Types of fixed, movable, and interlocked guardsTesting door interlocks and safety switchesVerifying emergency stop buttons and circuitsConfirming light curtains or area scannersDocumenting safety device tests and findingsLesson 9CNC pre-start checklist: mechanical, electrical, tooling, workholding, and coolant system inspectionsThis part reviews a systematic CNC pre-start checklist, including mechanical, electrical, tooling, workholding, and coolant inspections, stressing records, consistency, and spotting unsafe or odd conditions early.
Visual walkaround and housekeeping verificationMechanical axis travel and limit stop checksElectrical panels, indicators, and cable conditionTooling integrity, clamping, and offset confirmationWorkholding security and part location verificationCoolant level, concentration, and flow path checks
