Lesson 1Basic CNC program structure and common G-code/M-code elements relevant for verificationDis section introduce basic CNC program structure, key G an M codes, an how fi read blocks, comments, an tool calls so operators can verify programs fi safety, correct motion, an compatibility wid de 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)Dis section define proper responses to abnormal pre-start findings, including tagging, isolating, notifying responsible personnel, an initiating maintenance, while preventing unsafe bypasses or unauthorized repairs.
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)Dis section detail required PPE fi CNC milling, why each item needed, an how fi select, inspect, an use it correctly, linking hazards such as chips, noise, an sharp edges to specific protective equipment.
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)Dis section outline typical lockout/tagout steps fi CNC machines, including energy isolation, dissipation, verification, an documentation, stressing coordination wid maintenance an compliance wid site procedures.
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)Dis section explain main CNC milling components an de control interface, showing how spindle, axes, tool changer, coolant, PLC, an HMI interact, an how operators use screens, keys, an 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)Dis section review machine-specific CNC hazards such as entanglement, flying chips, tool breakage, coolant exposure, an electrical risks, an links each hazard to preventive measures an safe work 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 inspection items for CNC (tool wear, spindle runout, coolant level, chip evacuation)Dis section define daily an shift inspection items such as tool wear, spindle runout, coolant level, an chip evacuation, showing how routine checks prevent failures, improve finish, an support stable 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 machinesDis section focus on verifying guards, interlocks, an emergency stops, explaining test methods, acceptance criteria, an documentation so operators can confirm dat safety systems function before an 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 checksDis section cover a structured CNC pre-start checklist, including mechanical, electrical, tooling, workholding, an coolant checks, emphasizing documentation, repeatability, an early detection of unsafe or abnormal 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
