Method of controlling the motion of a spinner in an imaging device

摘要

A method of controlling the motion of a spinner in an imaging device is described. The spinner is rotatable at known angular velocity about an axis and moveable in a traverse direction along the axis. The method comprises: receiving an index pulse indicative of a rotational position of the spinner; synchronising the traverse movement of the spinner to the received index pulse; and moving the spinner in the traverse direction such that the spinner arrives at a predetermined target location with the spinner in a predetermined orientation for imaging.