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Troubleshooting of Through-beam Photoelectric Sensor

FAQ No. FAQ02947

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Question

We use Through-beam Photoelectric Sensors and malfunction occasionally occurs. What is the cause of this problem and how can it be corrected?

Answer

The optical axis may have changed because of vibration or shock. If Sensors have a sensitivity adjuster, perform the following procedure to adjust the optical axis.

1.Set the sensitivity adjuster halfway between MIN and MAX.

2.Adjust the optical axes of the emitter and receiver at that sensitivity.
Move the emitter up and down and to the left and right to adjust it to the center of the angle range for receiving light.
Move the receiver up and down and to the left and right to adjust it to the center of the angle range for receiving light.

3.Last, set the sensitivity adjuster to MAX.

Note:If Through-beam Sensors donít have a sensitivity adjuster, use a slit to attenuate the light.