CNC Machine Daily Pre-Op Inspection

Daily pre-operation inspection for CNC machines covering coolant, chuck guards, way oil, tool offsets, and basic machine readiness.

Machine Safety and Guards

• Chuck guard and other machine guards are installed, closed, and undamaged
  Confirm all required guards are in place and functioning. Do not start the machine if a guard is missing, bypassed, or damaged.
• Emergency stop and machine controls are accessible and unobstructed
  Verify the E-stop and primary controls can be reached without obstruction and are not damaged.
• Work area around the machine is clear of chips, tools, and trip hazards
  Check the immediate area for loose tools, debris, coolant spills, or other obstructions that could affect safe operation.

Coolant and Lubrication

• Coolant level is within the acceptable operating range
  Verify coolant is at the proper level for the machine and operation. Add coolant if below the minimum operating level.
• Coolant condition is acceptable and free of visible contamination
  Look for excessive tramp oil, foul odor, discoloration, foam, or visible contamination that could affect machining or tool life.
• Way oil or automatic lubrication system is at the proper level
  Confirm way oil reservoir or lube system is within the acceptable operating range and there are no obvious leaks.

Tooling and Offsets

• Tool offsets match the current setup sheet or program requirements
  Confirm tool length, diameter, wear, and work offsets are correct for the loaded job and have been verified after any tool change.
• Loaded tools are secure, undamaged, and appropriate for the operation
  Inspect the toolholders and cutting tools for looseness, wear, cracks, or incorrect tooling for the job.
• Workholding and part setup are secure
  Verify the vise, chuck, fixture, or clamps are tight and the part is properly seated before starting the cycle.

Machine Readiness

• Machine power-on status and alarms are clear
  Verify the machine powers up normally and there are no active alarms preventing safe operation.
• Program, part number, and revision match the work order
  Confirm the correct CNC program and job documentation are loaded for the current production run.
• Operator notes
  Record any abnormalities, adjustments made, or follow-up actions needed before production starts.