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#Waveform of stepper motor drive driver#
#Waveform of stepper motor drive software#

Therefore, when positioning control, it is positioned by subdivided 2-phase or 1-phase conduction.

Although the angle of the subdivision can be located, its accuracy is not high.

By actually testing the current waveforms and motor rotation angles of different subdivisions, we find that there is no difference in effect between 8 subdivisions and 16 subdivisions.

The more the number of subdivisions, in theory, the more obvious the effect of reducing vibration, but the actual effect to 8 subdivisions is not large.

If the input frequency is too fast, the subdivision waveform will not be able to get the desired current waveform, which will make the motor tracking accuracy worse.

The better the subdivision drive works at low speeds.

The subdivision drive method is an extremelyĮffective way to reduce vibration, but there are the following points to note: Phase is more delicate than the current curve of the half-step drive, which is It can be seen from the figure that the current curve of each The figure above shows the current diagram ofĤ subdivisions.

The following figure is a schematic diagram of the motor stator current sequence in a half-step drive mode: Compared with the whole step method, the half-step method has the advantages of double the precision and less vibration at low-speed operation. In this cycle, the two-phase coil is single-phase and then double-phase excited, and the stepping motor will rotate at half a step angle of each pulse.

#Waveform of stepper motor drive driver#

After the driver receives the next pulse and gives two excitations at the same time, the rotor will move half a step angle and stop in the middle of the two adjacent full-step positions. In the case of single-phase excitation, the rotor stops at one position.

#Waveform of stepper motor drive software#

However, the advantage of the full-step drive is that the hardware or software is relatively simple in design so that the drive manufacturing cost is easily controlled. With this driving method, the motor will shake at low speed and the noise will be large.

The current vector driven by the full-step divides a circle into four equal parts, and the current waveform is rough.