5. How to choose the power supply voltage of the stepper motor driver?
The stepping motor driver produced by our company is wide-voltage input. The range of input voltage can be selected. The power supply voltage is usually selected according to the working speed and response requirements of the motor. 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.
6. Does the number of subdivisions of the subdivision driver represent 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.
7. 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.
