Nubo wrote:Be wary of using a "butt-dynomometer" to determine acceleration rates.
There is a slight lull when accelerating from a dead-stop. Imho this (initial slew rate) is done to protect the drivetrain.
Agree with both your points. I'd also add that depending on how the motor is synchronized, there may be a limit to the initial acceleration so that the motor can stay in sync. At least with some permanent magnet DC motors, the drive must be turned off during a small time window so the synchronization circuitry can operate. These windows are controlled by computer and during initial acceleration from a dead stop it can be hard to accurately time them while keeping them sufficiently short.
Finally, the derivative of acceleration is jerk and minimizing it will reduce the stress on the mechanical drivetrain.