Adjusting or Replacing the Pallet Sensor on the Robotiq Palletizer

Symptoms of a Pallet Sensor Issue

1. No Detection of Pallets

• The system fails to detect when a pallet is present.

• Robot stops or errors trigger because the pallet position isn’t recognized.

2. False Positives

• The palletizer reports a pallet when there is none.

• The sensor triggers erratically even with no pallet in place.

3. Intermittent Detection

• Sometimes pallets are detected, other times not.

• System inconsistency despite correct pallet placement.

4. Error Messages on HMI/Controller

• “Pallet not detected” type messages displayed.

• Sensor-related fault codes (e.g., “Sensor fault,” “Input signal missing,” “Unexpected sensor reading”).

Initial Troubleshooting Steps

• Check for obstructions or debris

• Verify sensor alignment

Advanced Troubleshooting Steps

If the basic troubleshooting steps don’t resolve the issue, you can confirm whether the sensor is faulty by switching its position. This test helps determine whether the problem lies with the sensor itself or with the wiring or controller.

1. Swap Sensor Sides

•  Your palletizer uses two identical pallet sensors (e.g., left and right):

  • Disconnect both sensors.

  • Swap their physical positions and connectors.

  • Reboot or restart the system.

Manual for replacing or adjusting pallet sensors

Manual