Stepper motor is the use of electronic circuits, the DC component of the power supply, multi-phase sequence control current, with this current for the stepper motor power supply, stepper motor can work normally. Usually, the stepper motor can not work normally. What method can we use to judge whether the stepper motor is broken? Today, we will share two practical methods with you, which can judge quickly and easily.

If the stepping motor can not work normally, there are two ways to judge whether it is broken First, in the case of not connecting any equipment and wires, separate each wire of the stepping motor, do not touch the wire, and turn the shaft by hand. A good motor should be able to rotate smoothly with only a certain force, and there is no card in the middle. If a certain position is stuck or unable to rotate at all in the middle, it indicates that the motor is broken, which may be due to bearing displacement and internal rotor and stator grinding Loss. The damage should be caused by excessive external force. The impedance of "adjacent" two phases can be measured with a multimeter, which should be equal to the coil impedance given by the product.

If the device detects idling, it should be able to reach the specified speed. At general speed, the noise should be stable. In addition, we need to test with load. Specific test parameters need to be combined with load torque and motor torque. Screw all the wires together. The larger the motor is, the greater the force needed to screw. The general stepping motor can't be screwed by manpower at all. (the more threads twisted together, the greater the force required. )If it is invalid, it indicates that the coil is broken. When testing the equipment, it should be able to reach the specified speed when idling, and the noise should be stable when the speed is normal. In addition, we need to test with load. Specific test parameters need to be combined with load torque and motor torque. Second, screw all the wires together. The larger the motor is, the greater the force required for screwing. Generally speaking, stepping motors can't be screwed manually. (the more threads twisted together, the greater the force required. )If it is invalid, it indicates that the coil is broken.

For synchronous motor, in addition to the above methods, it is necessary to carefully observe its rotor, which can not be ignored. If there is a gap on the rotor, it is not dislocated and small, the nails can not be embedded, and the dynamic performance is at least 20% off. At this time, it is very easy to lose step, so it is recommended to replace it. The fatal weakness of the stepper motor is that it can not be knocked when loading and unloading, and it is easy to damage the encoder inside. Stepper motor's power coil burn out probability is quite low, encoder and connector damage are common, and stepper fault is common encoder fault.