I’m new to steppers and have been experimenting. What effect does changing the motor frequency have? I’ve tried 500hz, 1000th and 1600hz and the RPM doesn’t change.
Most steppers cannot achieve a step frequency much higher than a few hundred full steps per second.
To attain the highest step frequency, you have to start slow and gradually accelerate.
Just about everything you ever wanted to know about stepping motors can be found here: http://homepage.cs.uiowa.edu/~jones/step/