batata004:
So how will the motor know the speed to make this one step?
There is no such thing as the speed for one step. A single step always happens as fast as the motor's magnetism can achieve. A stepper motor moves as a series of jerks. You can change the interval between the jerks. But not the speed of the jerks themselves.
Using microstepping reduces the distance moved in each jerk - but there will still be jerks.
And why have you now got 3 Threads going? Please click Report to Moderator and ask for them to be merged so we have all the info in one place.
...R