Common faults and solutions of stepper motor drivers

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Stepper motors and drivers are commonly used in CNC engraving machines, machining centers, CNC machinery,cnc stepper motors,and other places where precise positioning is necessary. As a step motor driver in electronic products, it is inevitable to encounter some common faults in installation or application. Here are detailed descriptions of some common faults and simple maintenance methods.

1. Driver disconnection: The disconnection of the connection with the motor, power cord, and switch power cord will make the motor unable to work.

2.Driver alarm: It can distinguish whether there is a fault in the stepper motor driver, such as overvoltage, undervoltage protection, overcurrent, overtemperature, etc, based on LED or other methods of identification and instructions for use.

3.Stepper motor driver system without power supply for the driver: It can use the working voltage range of a digital multimeter to check the wiring of the driver’s power supply system terminals and the working voltage of the power supply system.

4.Driver commercial insurance is broken: If the operating voltage of the driver power supply system is normal and the motor is not working, and the driver indicator light is not on, it can be analyzed and determined that the commercial insurance inside the driver is broken. If the internal application of the driver is self repairing commercial insurance, it can disconnect the motor and driver, wait for some time, and do not connect the motor to power on again. If the driver can operate normally, it indicates that the motor has a short circuit fault.

5.Driver enable data signal is incorrect: When the enable data signal is incorrect, the motor may not be locked. At present, most drivers on the market can operate normally without connecting the enable data signal. If there is a common fault of not locking when powered on, the enable electrode connection wire can be disconnected to distinguish whether the enable data signal is incorrect.

6.The basic parameters of the driver are incorrect: generally, the electric flow rate is set too low, and the current cannot drive the motor.

7.Poor contact of the power cord: Air oxidation of the power cord or loose screws.

8.Difficulties of the motor itself: rusting and jamming of the motor shaft, demagnetization, short circuit, etc.

9.Pulse signal challenge: The pulse signal does not comply with the data signal regulations of the driver, such as a very small pulse width, a single pulse frequency that is too high, or a single pulse signal that is too low (such as the driver having to provide a 9V pulse signal and presenting a 3.3V pulse signal).

10.Internal circuit failure of the driver: If there are several drivers of the same type in hand, they can be immediately replaced and distinguished.