Issue Description: One of the common issues encountered with CSF/CSD machines is the failure of the belt motor to run during the machine cycle or when initiated using the HMI (Human-Machine Interface). Customers have reported that they can manually activate the motor starter contacts, but the motors fail to run through the machine's automated cycle or HMI control.

Troubleshooting Steps:

1. Manual Motor Activation Check:
   • Verify that the belt motor can be manually activated by pushing the motor starter contacts. This step confirms that the motor itself is functional.
   • If manual activation works but automated activation does not, proceed with further troubleshooting.
2. Check PLC and Relay Operation:
   • Understand the sequence of operations in the PLC (Programmable Logic Controller) that actuates the relay responsible for activating the motor contactor.
   • Identify the specific relay (e.g., R3 for sealing area motors, R2 for folding area motors) associated with the belt motor.
3. Inspect Relay Status:
   • Observe the status of the relay when the PLC sends the signal to run the motors. The relay's orange indicator light should illuminate, indicating that it has received the signal.
   • If the relay's light does not turn on, it suggests a potential issue with the relay or its wiring connections.
4. Check Relay and Wiring Connections:
   • Visually inspect the relay for any signs of damage or malfunction. Replace the relay if it appears faulty.
   • Examine the wiring connections between the PLC, relay, and motor contactor. Ensure all connections are secure and free from damage or corrosion.
   • Test the continuity of wiring connections using a multimeter to confirm proper electrical flow.
5. Thermal Relay:
   • Verify if the thermal relay is functioning correctly by checking the continuity of the normally closed or normally open switch when a signal is sent. If the switch's continuity status doesn't change upon sending a signal, the thermal relay may be faulty.
6. Verify PLC Signal Output:
   • Use diagnostic tools or software to monitor the PLC's signal output when attempting to run the motors via the HMI.
   • Confirm that the PLC is sending the correct signal to the relay for motor activation.
7. Replace Faulty Components:
   • If the above steps indicate a faulty relay or wiring issue, replace the defective components.
   • Ensure that replacements are compatible with the machine's specifications and follow proper installation procedures.

Conclusion: By following these troubleshooting steps, you can identify and resolve issues related to belt motor non-operation on CSF/CSD machines. It is crucial to check the relay status, wiring integrity, and PLC signal output to pinpoint the root cause and take appropriate corrective actions. Regular maintenance and timely replacement of faulty components can help prevent similar issues in the future.