What are the steps for daily inspection of MILL DC Motor?

1. Appearance inspection
Check the appearance of the motor: Observe whether the motor housing is intact, and whether there are cracks, damage or corrosion signs. Ensure that there is no water leakage or dripping around the motor to prevent insulation degradation and breakdown and burning.
Check fasteners: Check whether the external fasteners of the motor are loose, and whether the electrical connection is hot and discolored due to poor contact.
2. Brush and collector ring inspection
Brush distribution and contact: Check whether the brushes are evenly distributed on the circumference of the rectifier surface. The brush spacing deviation should generally not be greater than 1mm, and should be in full contact with the rectifier surface. The contact surface of the newly installed carbon brush should not be less than 85%.
Brush wear: When the brush wears to 1/3 of the original height, it is necessary to replace the copper powder graphite carbon brush of the same brand. When sparks appear under the brush, check whether the brush is stuck, whether the position is skewed, whether it is close to the collector ring, and whether the pressure is moderate.
Clean the brush powder deposits: The brush powder deposits on the collector ring should be blown clean with a leather tiger in time to avoid blowing the brush powder deposits into the motor seat.
3. Auditory inspection
Check the running sound: Under normal circumstances, the sound of the motor should be smooth and uniform. If there is abnormal noise, such as friction sound, impact sound, etc., it may be a signal of wear or failure of the internal parts of the motor, and it is necessary to stop the machine immediately for inspection.
4. Olfactory inspection
Check the smell: The motor itself should not have any odor. If there is an abnormality such as a burnt smell, be alert to possible problems inside the motor.
5. Tactile inspection
Check the temperature and vibration: Touch the surface of the housing and the bearing seat with your hand to find the vibration and high temperature of the motor.
6. Electrical inspection
Check the junction box: Check the condition of the junction box, check for damage, rust, etc., check whether the inside is damp, and whether the wiring screws are loose or burned.
Measure the insulation resistance: Use an insulation resistance meter to measure the insulation resistance of the motor. If the insulation resistance of the motor is lower than the required value, the motor should be replaced or repaired immediately. The motor insulation inspection is generally performed every six months.
Check winding resistance: Measure the winding resistance of the motor. The unbalance of the measured three-phase DC line resistance value cannot exceed 2%.
7. Ventilation and heat dissipation inspection
Check the air duct: Ensure that the air duct is unobstructed, and clean the dust and debris in the vent in time to prevent the motor from overheating.
8. Bearing inspection
Check lubrication: Check the lubrication of the bearing regularly to ensure that the lubricating oil is sufficient and of good quality. If the lubricating oil is found to be deteriorated or insufficient, it should be replaced or supplemented in time. At the same time, check the degree of wear of the bearing and replace the severely worn bearing in time.