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Power Down Machine

Turn off the CNC machine and disconnect power to ensure safety while accessing the mist collector.

Always double-check that the machine is in a complete power-off state before proceeding.

Risk of electrical shock if power is not disconnected.

Inspect Filter Condition

Locate the mist collector filter (refer to machine manual for exact location) and remove it for inspection. Look for excessive dirt, oil, or debris buildup that could block airflow.

Take a photo of the filter before removal to document its condition for future reference.

Wear gloves to avoid contact with contaminants on the filter.

Clean or Replace Filter

If the filter is reusable, clean it according to manufacturer guidelines (e.g., with compressed air or solvent). If it’s too damaged or non-reusable, replace it with a compatible filter part number as specified in the manual. Reinstall and test the system.

Keep a spare filter on hand to minimize downtime during replacement.

Ensure proper filter installation to prevent leaks or further airflow issues.

Power Down and Lockout

Shut down the CNC machine and apply lockout/tagout procedures to prevent accidental startup while working on the motor.

Use a lockout device specific to your machine’s power system for added safety.

Failure to lockout can result in serious injury from unexpected motor activation.

Check Motor Operation

Manually inspect the mist collector motor for signs of operation when power is restored (if safe). Listen for humming, grinding, or no sound at all, and check for overheating by cautiously feeling the motor housing.

Use a non-contact infrared thermometer to safely check motor temperature.

Do not touch the motor if it appears excessively hot; allow it to cool first.

Test Motor Electrical Connections

Using a multimeter, test the motor’s electrical connections for continuity and proper voltage as per the machine’s specifications. Tighten any loose connections or replace damaged wiring if found.

Label wires before disconnecting to ensure correct reassembly.

Only qualified personnel should handle electrical testing to avoid shock hazards.

Isolate Power Supply

Turn off and disconnect the CNC machine from power to safely access the mist collector airflow paths.

Post a 'Do Not Operate' sign on the machine during maintenance.

Risk of injury if machine is powered on during inspection.

Inspect Ducts and Hoses

Examine all accessible ductwork, hoses, and vents connected to the mist collector for visible blockages, kinks, or disconnected sections. Use a flashlight for better visibility in tight spaces.

Mark any damaged sections with tape for quick identification during repair.

Avoid using excessive force on hoses to prevent further damage.

Clear Obstructions

Remove any debris, dust, or obstructions found in the airflow path using compressed air or a soft brush. Reconnect or straighten any misaligned hoses or ducts, then test the system for proper airflow.

Use a low-pressure air nozzle to avoid damaging internal components.

Wear safety goggles to protect eyes from debris during cleaning.

Ensure Machine is Off

Power down the CNC machine completely and confirm it is de-energized before accessing sensor components.

Verify power status with a voltage tester for added safety.

Risk of electrical shock if power is not fully disconnected.

Locate and Inspect Sensor

Refer to the machine manual to locate the mist collector’s airflow or pressure sensor. Visually inspect for loose connections, corrosion, or physical damage to the sensor or wiring.

Take note of sensor part numbers for potential replacement ordering.

Handle sensors delicately to avoid further damage.

Test Sensor Functionality

Use a multimeter or diagnostic tool (as per manual) to test the sensor’s output signals. Compare readings to manufacturer specifications. Replace the sensor if readings are out of range or erratic.

Consult Fanuc support for specific diagnostic tool compatibility if unsure.

Incorrect sensor replacement can lead to recurring alarms.

De-Energize Machine

Turn off the CNC machine and disconnect all power sources to safely inspect electrical components.

Use lockout/tagout procedures to secure the machine during work.

Risk of severe injury or death if power is not disconnected.

Inspect Wiring Harness

Trace the wiring connected to the mist collector system, checking for frayed wires, loose terminals, or burnt insulation. Pay close attention to areas near moving parts or high heat.

Use a magnifying glass to spot small cracks or wear in insulation.

Do not tug on wires; gently manipulate to avoid further damage.

Test and Repair Wiring

Use a multimeter to test for continuity in suspected wiring sections. Repair or replace damaged wires using electrical tape or heat-shrink tubing, ensuring all connections are secure before retesting the system.

Document wire routing before repairs to ensure correct reassembly.

Only trained personnel should perform electrical repairs.