The following is a standardized maintenance method for safety light curtains, integrating industry practices and technical specifications:
I. Daily Inspection Points
Optical Path Alignment Verification
Before starting the unit daily, check that the transmitter and receiver are aligned parallel to each other. The offset angle must be ≤±2°.
Use a 40mm wide test baffle to simulate a palm trigger and verify the response sensitivity of each optical path.
Indicator Status Monitoring
Under normal conditions, the transmitter should illuminate red. The receiver should illuminate green when unobstructed, switching to an infrared warning light if obstructed.
Anomalous flashing (e.g., alternating red and green) requires immediate shutdown and investigation.
Environmental Interference Prevention
Remove reflective objects (such as metal plates and glass) from the light curtain path to avoid strong interference. Direct light interference
High-power equipment (inverters, motors) must be kept at least 1m away from the light curtain to prevent electromagnetic interference.
II. Periodic Maintenance Measures
Cleaning and Maintenance Specifications
Wipe the optical window weekly with an anhydrous alcohol pad. In dusty environments, this should be reduced to every 48 hours.
Abrasive cleaning agents are prohibited. For heavy oil stains, use a neutral solvent for gentle cleaning.
Mechanical Structure Inspection
Monthly check the mounting bracket screw torque (recommended value: 4-6 N·m) to prevent vibration and loosening.
Synchronize and calibrate the light curtain height to match the equipment travel. The margin must be ≥ 10%.
Electrical System Inspection
Quarterly measure the power supply voltage fluctuation range (24V DC ±10%), ground resistance <4Ω
Use an oscilloscope to monitor the signal output waveform. Abnormal glitches require checking the line shield.
III. Emergency Troubleshooting
Fault Symptom Solution Priority
Continuous false alarms: Check for ambient light interference or lens contamination. Clean and restart. High
Partial beam failure: Test the transmitter/receiver unit of the corresponding channel and replace the damaged module. Emergency
Response delay > 20ms: Check the control system parameters and adjust the light curtain sensitivity to ISO 13855 standards. Medium
IV. Long-term Management Recommendations
Personnel Training: Operators must master the obstruction test method and emergency shutdown procedures.
Record Analysis: Create a maintenance log to record fault codes and corrective actions.
Preventative Replacement: The photoelectric component typically has a lifespan of 5 years; replace it before expiration.
The above methods ensure the protective reliability of the light curtain and reduce the risk of mechanical damage by over 30%.
