580

Check main shop air pressure at the machine disconnect. Verify pressure meets minimum specification (typically 5-6 bar/72-87 PSI).

Inspect air pressure gauge at the spindle unit or air preparation assembly. Confirm pressure is within range at the spindle inlet.

Verify all manual air shutoff valves in the supply line to the spindle are fully open and not restricted.

Check air filter/regulator assembly for clogged elements. Clean or replace filter cartridge if pressure drop is detected across the assembly.

Locate the spindle purge solenoid valve (typically mounted on spindle head or in electrical cabinet). Listen for audible click when spindle is enabled. No click indicates valve failure.

With machine power OFF and air pressure isolated, disconnect air lines and manually inspect solenoid valve for debris or mechanical jamming. Clean or replace valve body if contaminated.

Lock out air supply before disconnecting pneumatic components to prevent injury.

Check continuity of solenoid coil (typically 20-200 ohms depending on voltage). Replace solenoid if coil is open or shorted.

Test air flow switch by applying shop air directly. Verify switch contacts change state with proper air flow. Replace flow switch if defective.

Disconnect air supply line at spindle inlet. Apply shop air and verify strong, unrestricted flow through the supply tubing. Replace kinked or collapsed tubing.

Inspect rotary union or through-spindle air coupling for coolant ingress or debris blockage. Clean passages with compressed air and verify free rotation.

Ensure spindle is locked and cannot rotate during inspection to prevent injury.

Check spindle purge outlet ports for visible blockage or coolant buildup. Clear obstructions and verify air exits freely during purge cycle.

If moisture contamination is suspected, drain air receiver tank and inspect air dryer function. Replace desiccant or repair refrigerated dryer as needed.