One of the most common problems encountered during servo motor repair and maintenance is the loss of torque, excessive current, and overload errors, which are primarily caused by power loss in the magnets of the servo motor rotors due to the heat they are exposed to over time.

In servo motors undergoing Back EMF testing, the rotor magnets are also measured using a gauss meter after they are mounted to make a definitive judgment about the condition of the magnets when there is a suspicion of problems.

Furthermore, not only the rotor magnets of faulty motors are measured, but also the rotor magnets of motors where no issues are detected during the Back EMF test are measured to determine the required values for the magnets. These reference magnet values are recorded for future comparisons.

The aim is to make a precise diagnosis of a rotor when another motor with similar specifications comes to our workshop for repair, enabling an accurate determination of the fault