Method 1: Manual Rotation Test Method to quickly determine if the fish meal processing machine motor is stuck or seized.
This is the simplest and most intuitive test method, requiring no professional tools and can be operated with just your hands. Steps: First, turn off the main power to the pellet mill, unplug the power cord, and hang a "Testing, Do Not Start" warning sign to ensure the equipment is without power and free of material residue. Second, gently rotate the motor shaft by hand, feeling the resistance and smoothness of rotation. Third, judgment criteria: If the motor shaft rotates smoothly without sticking, significant resistance, or a "clicking" sound, the motor bearings and rotor are basically normal and without serious damage. If the rotation is stuck, has excessive resistance, or cannot rotate (seized), or even accompanied by a "clicking" sound, the motor bearings are damaged and the rotor is seized, indicating serious damage that requires immediate repair.
Method 2: Test Pen Test Method to determine if the fish food extruder machine motor is leaking electricity or if the insulation layer is damaged.
A test pen is a common electrical tool, easy to use, and can quickly detect whether a motor is leaking current and whether the insulation layer is damaged. Operating steps: First, connect the granulator power supply (motor not running) to ensure the circuit is normal; Second, hold the metal part at the end of the test pen and touch the tip to the motor casing, terminals, etc.; Third, judgment criteria: If the test pen does not light up, the motor insulation layer is intact, there is no leakage, and the circuit is basically normal; if the test pen lights up, and the operator feels a tingling sensation when touching the motor casing, it indicates that the internal insulation layer of the motor is damaged, the windings are leaking current, and the motor is damaged. Power must be disconnected immediately and use stopped.
Method 3: Simple multimeter testing method to determine if the fish food maker machine motor windings are short-circuited or open-circuited.
A multimeter is a common testing tool that requires no professional operating skills and can easily detect whether the motor windings are damaged, making it suitable for beginners. Operating Steps: First, turn off the power and disconnect the power cord from the motor terminals to ensure the motor is disconnected from the circuit. Second, set the multimeter to the "resistance" range (select the 200Ω range) and touch the two probes of the multimeter to the two terminals of the motor windings. Third, judgment criteria: If the multimeter displays a resistance value within the normal range (5-20Ω for small motors, 1-5Ω for medium and large motors), the windings are normal and undamaged. If the resistance value is 0, the windings are short-circuited. If the resistance value is infinite, the windings are open-circuited. Both situations indicate that the motor is damaged and needs repair or replacement.
Method 4: Auditory and visual inspection combined to determine if the fish feed processing machine motor is malfunctioning. No tools are required; only auditory and visual inspection is needed to preliminarily determine if the motor is damaged. This method is suitable for routine inspections. Operating Steps: First, connect the power supply, start the pellet mill motor, observe the motor's operating status, and listen to the operating noise. Second, visual inspection: Observe whether the motor is emitting smoke or leaking liquid, whether there are sparks at the terminals, whether the motor shaft is shaking or bent, and whether the cooling fan is operating normally. Third, auditory inspection: Listen to the noise of the motor during operation, looking for abnormal noises such as "clicking," "rustling," or "humming." Fourth, judgment criteria: If the motor runs smoothly, without smoke or leakage, and the noise is uniform and slight, and the cooling fan is operating normally, the motor is basically normal. If smoke, leakage, sparks at the terminals, abnormal noises, or motor shaft shaking occur, the motor is damaged.
Method 5: Load test method to determine if the power output of the fish food making machine motor is normal.
Combined with the actual operating load of the pellet mill, test the motor power output to determine if the motor is damaged, closely matching the actual production scenario. Operating steps: First, connect the power supply, start the pellet mill, and put in a small amount of dog food raw materials for trial production; Second, observe the operating status of the pellet mill: whether the roller speed is stable, whether the pellet formation is uniform, whether the output is normal, and whether the motor jams or stops; Third, judgment criteria: If the pellet mill runs smoothly, the roller speed is stable, the pellet formation is uniform, the output is smooth, and the motor has no obvious overheating or abnormal noise, it means that the motor power output is normal and there is no damage; If the roller speed fluctuates, the pellet formation is abnormal, the output drops sharply, and the motor jams or overheats, it means that the motor power output is insufficient and has been damaged (mostly rotor wear and winding aging).
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