Lesson 1Basic CNC program structure and common G-code/M-code elements relevant for verificationThis part introduces the basic setup of CNC programs, important G and M codes, and how to read sections, notes, and tool calls so operators can check programs for safety, proper movement, and fit with the machine 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 2Actions for abnormal conditions found during pre-start (tagging, notifying, isolating, initiating maintenance)This part explains right responses to unusual findings before starting, like marking, separating, informing key staff, and starting repairs, while stopping unsafe shortcuts or unapproved 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 3Mandatory PPE for CNC work and rationale (eye protection, hearing protection, cut-resistant gloves, aprons, safety shoes)This part lists required protective gear for CNC milling, reasons for each, and how to choose, check, and wear it right, connecting dangers like flying bits, noise, and sharp parts to specific safety items.
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 4Common lockout/tagout procedure steps applied to CNC machines (isolation, verification, documentation)This part outlines usual lockout/tagout steps for CNC machines, including cutting energy, releasing it, checking, and recording, stressing teamwork with repair teams and following 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 components and control interface (spindle, axis drives, tool changer, coolant, PLC/HMI)This part explains key parts of CNC milling machines and the control panel, showing how the spindle, axes, tool changer, coolant, PLC, and HMI work together, and how operators use screens, buttons, and modes safely.
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 safety hazards (entanglement, flying chips, tool breakage, coolant exposure, electrical risks)This part reviews specific dangers of CNC machines like getting caught, flying chips, tool breaks, coolant contact, and electrical issues, linking each to prevention steps and safe work habits.
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 inspection items for CNC (tool wear, spindle runout, coolant level, chip evacuation)This part defines daily and shift checks like tool wear, spindle wobble, coolant levels, and chip removal, showing how regular looks prevent breakdowns, better finishes, and steady production.
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 8Verifying guards, interlocks, and emergency stops on CNC machinesThis part focuses on checking guards, safety locks, and emergency stops, explaining test ways, pass standards, and records so operators confirm safety systems work before and during use.
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 checksThis part covers a planned CNC pre-start list, including mechanical, electrical, tool, holding, and coolant checks, stressing records, repeat checks, and early spotting of unsafe or odd conditions.
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
