Stepper motor common problems and solutions - Database & Sql Blog Articles

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First, how to control the direction of the stepper motor?

1, can change the direction signal of the control system

2, you can adjust the wiring of the motor to change the direction, as follows:
For two-phase motors, simply swap the motor wires of one of the phases into the drive, such as A+ and A-switch.
For three-phase motors, the motor lines of two adjacent phases are exchanged, such as: A, B, C three-phase, exchange A, B two phases

Second, the stepper motor has large vibration and great noise. What is the reason?

This situation is encountered because the stepper motor works in the oscillation zone, the solution:
1. Change the input signal frequency CP to avoid the oscillation zone.
2, the use of subdivision drivers, so that the step angle is reduced, the operation is smoother.

Third, why does the motor not run after the stepper motor is energized?

There are several reasons why the motor does not turn:
1. The overload is blocked (the motor has a howling sound at this time)
2. Is the motor offline?
3. Does the control system have a pulse signal to the stepper motor driver, and there is a problem with the wiring.

Fourth, the stepper motor is jittery and cannot run continuously. What should I do?

In this case, first check whether the winding of the motor and the driver are connected incorrectly. Check if the frequency of the input pulse signal is too high, and whether the design of the lifting frequency is unreasonable.

5. Under what circumstances is the offline signal FREE of the hybrid stepper motor driver generally used?

When the offline signal FREE is low, the current output from the driver to the motor is cut off, and the motor rotor is in a free state (offline state). In some automation equipment, if the motor shaft (manual mode) is required to be directly powered while the drive is uninterrupted, the FREE signal can be set low, the motor can be taken offline, and manually operated or adjusted. After manual completion, set the FREE signal high to continue automatic control.

Sixth, how to choose the stepper motor driver power supply?

Determine the supply voltage of the driver and then determine the operating current; the supply current is generally determined by the output phase current I of the driver. If using a linear power supply,
The power supply current can generally take 1.1 to 1.3 times of I; if a switching power supply is used, the power supply current can generally take 1.5 to 2.0 times of I.

Seven, how to choose the stepper motor driver supply voltage?

Stepper motor drivers are wide-voltage inputs with a wide range of input voltages; the supply voltage is usually selected based on the motor's operating speed and response requirements. If the motor has a higher operating speed or a faster response, the voltage is also higher, but note that the ripple of the supply voltage cannot exceed the maximum input voltage of the drive, otherwise the drive may be damaged. If the lower voltage is selected, it is beneficial to the smooth running of the step motor, and the vibration is small.

8. Can the subdivision of the subdivision driver represent the accuracy?

The subdivision is also called microstep. The main purpose is to reduce or eliminate the low frequency vibration of the stepper motor. Improving the running accuracy of the motor is only a supplementary function of the subdivision technology. For example, for a two-phase hybrid stepping motor with a step angle of 1.8°, if the subdivision number of the subdivision driver is set to 4, then the operating resolution of the motor is 0.45° per pulse, and the accuracy of the motor can be achieved or approached. 0.45° also depends on other factors such as the subdivision current control accuracy of the subdivision driver. The accuracy of subdivision drivers from different manufacturers may vary greatly; the larger the number of subdivisions, the more difficult it is to control.

9. Why does the torque of the stepper motor decrease with the increase of the speed?

When the stepper motor rotates, the inductance of each phase winding of the motor will form a back electromotive force; the higher the frequency, the larger the back electromotive force. Under its action, the motor decreases with increasing frequency (or speed), resulting in a drop in torque.