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Precautions for operating food-grade belt conveyors: Before starting a food-grade belt conveyor, it is necessary to first ensure that the conveyor equipment, the personnel, and the items being transported are all in a safe and intact condition； Next, check that all moving parts are normal and free of foreign objects, and verify that all electrical circuits are in good condition; only then can the belt conveyor be put into operation. Finally, check that the difference between the supply voltage and the device’s rated voltage does not exceed ±5%. Before putting the belt conveyor into operation, the following steps must be carried out: 1. Turn on the main power switch, and check whether power is being supplied to the belt conveyor properly and whether the power indicator light is on. Proceed to the next step after it returns to normal. 2. Turn off the power switches for each circuit of the belt conveyor and check whether everything is functioning properly. Under normal conditions: the equipment does not operate, the indicator light for the belt conveyor is off, the power indicator lights of devices such as the frequency converter are on, and the display panel of the frequency converter shows normal operation (with no error codes displayed). 3. Start each electrical device of the belt conveyor in sequence according to the process flow; start the next electrical device only after the previous one has started properly (the motor or other device has reached its normal speed and operating condition). During the operation of a belt conveyor, it is necessary to comply with the specifications for the items being transported as defined in their design, as well as to adhere to the design capacity of the belt conveyor. Secondly, it is important to ensure that no one touches the moving parts of the belt conveyor, and that untrained personnel do not handle electrical components or control buttons without permission. Finally, during the operation of the belt conveyor, it is not allowed to disconnect the circuit downstream of the inverter; if maintenance is necessary, it must be carried out with the inverter stopped, otherwise the inverter may be damaged. When the belt conveyor stops operating, press the stop button; the main power supply can be turned off only after the entire system has stopped.