MotionTrajectory reads the
current velocity and acceleration for all axes associated with a
Motion object (motion). The trajectory
argument points to an array of MPITrajectory structures, with a
size equal to the number of axes associated with the Motion object
(motion).
NOTE: deceleration, jerkPercent, accelerationJerk, and decelerationJerk
fields cannot be read from the controller and consequently are set
to zero.
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