In daily production on Beiren (BEIREN) series printing presses, sensor photoelectric faults are among the most common problems encountered by press operators and maintenance personnel. As a representative domestic offset press, this model features strong parts interchangeability, low maintenance costs, and electrical systems mostly controlled by domestic PLCs. If not addressed promptly, the consequences can range from affecting registration accuracy and print quality to causing extended downtime in severe cases.
I. Fault Symptoms: Frequent false alarms on paper detection, misalignment, and failure of detection photocells, leading to repeated stoppages.
II. Cause Analysis: Dirty or aged photoelectric switches, shifted detection positions, contaminated reflector plates, and signal line interference. Given that the Beiren domestic offset press is representative of models with strong parts interchangeability, low maintenance costs, and domestic PLC-controlled electrical systems, priority should be given to checking key components and standard parameters during troubleshooting.
III. Practical Repair: Clean the photocells and reflector plates, reposition and secure detection points, replace aged photocells, and shield signal lines against interference.
IV. Preventive Measures: Regularly clean detection windows, rotate spare parts, and record false-alarm patterns. The above methods also apply to models such as Beiren 300, Beiren 400, PZ4880, and N300. For actual operations, refer to the domestic CNC system / centralized lubrication control and on-site working conditions. In complex situations, it is recommended to contact professional maintenance support via the printm.cn platform.
