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Lock out machine power and verify chip conveyor area is safe to access. Visually inspect conveyor belt/chain for jams, broken links, or accumulated chips causing blockage.

Use proper LOTO procedures before accessing chip conveyor area

Remove any chip buildup or foreign objects blocking the conveyor path. Check conveyor belt tension and alignment, ensure drive components move freely by hand.

Check thermal overload relay on chip conveyor motor - reset if tripped. Inspect motor coupling and drive mechanism for mechanical failure or excessive wear.

Restore power and test chip conveyor independently if possible. Monitor motor current draw during operation to verify normal load conditions before clearing alarm and resuming spindle operation.

Access PMC diagnostics (PMCMNT screen) and locate chip conveyor feedback signals. Check signal status for conveyor run confirmation, typically labeled CHIP_CNV_RUN or similar.

Manually operate chip conveyor and observe if feedback signal changes state. If signal does not respond, locate the physical sensor (proximity switch on motor shaft or conveyor roller).

Check sensor mounting position, wiring connections, and target gap distance. Test sensor voltage supply (typically 24VDC) and output signal continuity to the machine I/O board.

Replace faulty sensor if defective. Verify proper signal logic in PMC ladder - ensure timer values allow adequate startup time before alarm triggers. Clear alarm after confirming feedback signal operates correctly.

Locate chip conveyor control relay/contactor in electrical cabinet (check machine electrical prints). Visually inspect for burned contacts, coil damage, or loose wire terminations.

Work on electrical components must be performed by qualified electrician with proper LOTO

Using electrical schematic, verify coil voltage at relay when chip conveyor start signal is commanded from CNC. Measure voltage with multimeter to confirm output from PLC/PMC is present.

Check auxiliary contact continuity that provides run feedback to CNC. Test contact operation manually if relay appears energized but contacts are not closing properly.

Replace faulty relay/contactor if coil or contacts are defective. Verify all interlocks in chip conveyor circuit are satisfied (coolant tank level, access doors, emergency stops) before final testing.