One PWM signal and its complement (green) connect to two post pins and they excite opposing coils. Now assume we’re using a SoC-driven stepper motor for a general rotary-positioning application.

At higher speeds, the nonlinearities cause short-term speed variations within a single rotation of the motor. This adds undesired components to the torque that increase noise and vibration of the ...

This implies that the PWM signal is generated in the driver chip and uses a proprietary PWM algorithm for reliable current control. The NXT step can be a full step or a microstep down to 1/32 of a ...