They call them AC servos in the manual, and write "Control Method: PWM (sine wave driven)".
How do you define cogging? I thought this was some kind of magnetic effect in the motor. When turning the motor by hand, unconnected, I can feel the cogging as loose "steps", a few per turn (~4-8). If I short the motor leads for dynamic braking, the "cogging" becomes permanent - i.e. resists movement not in steps, but regardless of the rotor position. The "feel" of the reistance is the same, just that it's only in certain positions in the turn when it's because of the cogging.
Wouldn't the uneven movement of a BLDC motor at low RPM be because only a few discrete directions are possible for the magnetic field in the motor? Not because of cogging?
Just trying to understand cogging, not sure I've got it right.
Thanks for all the help Al!
Arvid