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Whereas the full-step drive turns the currents of the two windings on and off and rotates them by a fixed angle, the micro-step drive can rotate them at a step angle finer than the basic step angle by changing the current ratio of the two windings in a stepwise manner.

The range is 1/4, 1/8, 1/16, 1/32, and 1/64 (steps).

Full-step mode

Full-step mode

The step angle is 360 degrees divided by the total number of poles.

For the four poles, 360 degrees/4 = 90 degrees.

Assuming there is a 36-pole motor, 360 degrees/36 = 10 degrees, and the single-step operating angle of the full-step mode is 10 degrees.

Half-step mode

Half-step mode

One step angle of the half-step mode is 1/2 of the full-step mode.

Micro-step mode

Micro-step mode

One step angle of the micro-step mode can be selected to be 1/4 of the full-step mode and a finer step angle.

(Example 1/4)

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