Warehouse Wire Guidance System Verification
This procedure ensures the inductive wire guidance system on narrow-aisle turret trucks is functioning within manufacturer specifications. Regular verification prevents runaway steering deviations and reduces collision risk in high-density racking environments.
To establish a repeatable verification procedure for the floor-embedded wire guidance system that controls steering on turret trucks operating in narrow aisles. Proper verification reduces unplanned downtime, ensures positional accuracy within ±10 mm, and extends the life of guidance pickup sensors.
This SOP applies to all turret trucks equipped with inductive wire guidance systems (40–200 kHz) operating in high-bay warehouses. It covers sensor inspection, signal voltage measurement, calibration offset verification, floor slot condition assessment, and a full dynamic drift test. Excluded: wire loop continuity testing and main controller diagnostics—refer to separate PM log.
- Lockout/tagout the turret truck’s main power and guidance controller before accessing the sensor. Verify zero energy state with a multimeter.
- Wear impact-rated safety glasses, cut-resistant gloves, and steel-toed boots. Use hearing protection if operating in active warehouse zones.
- Do not step on the wire slot cover plates while they are removed. Use temporary barricades if working on the floor slot.
- During dynamic drift test, cordon off a 50 m straight section. No personnel or equipment allowed in the test lane at any time.
- Inductive signal analyzer (or oscilloscope with 40–200 kHz bandwidth)
- TRMS multimeter (AC voltage, 0–10 V range)
- Calibration wedge set (0.5 mm, 1.0 mm, 1.5 mm thicknesses)
- Torque wrench (0–20 N·m) and socket set for sensor bracket bolts
- Wire slot cleaning tool (bristle brush, compressed air)
- Epoxy repair kit for floor slot (two-part metallic epoxy)
- Lockout/tagout kit with padlock and hasp
- Digital level or inclinometer for checking sensor alignment