Arduino. Stepper motor driver control library (or AccelStepper is buggy)?

Question

Arduino

In general, subject.
Why is AccellStepper not satisfied?
Because sometimes it refuses to move, and then continues as if nothing had happened (version 1.47 tried the previous ones, it's even worse there.).
In short, I approximately found out that the matter is in runSpeed ​​()
while targetPos is not equal to pos, i.e. like he should, but he doesn't want to.
So far, I myself figure out how to make a more or less normal control of the stepper, but it is problematic to calculate acceleration and deceleration, and the enthusiasm fades from the idea, the whole weekend I was tormented with this =(
Therefore, I ask you to suggest an adequate library for controlling the stepper =)

Answer 1

When I played with the steppers, I used the standard one, I checked the accuracy of the work by cyclically wrapping the same figure 400 times, I didn’t go astray a millimeter, although his speed was not so hot, but this is because the steppers were Chinese for 50 rubles a piece.

Answer 2

I did not like the standard library, every time I invent my own bike, but my own.