Patent ID: 7328118

Claim:
A method of determining mass unbalance of an actuator mechanism in a system, the method comprising: calculating a center of gravity of the actuator mechanism in first x (C X1 ) and y (C Y1 ) components of a first coordinate system, wherein the first coordinate system intersects a pivot shaft of the actuator mechanism and has a y-axis in parallel with a longitudinal axis of the system and an x-axis normal to the y-axis; calculating the center of gravity in second x (C X2 ) and y (C Y2 ) components of a second coordinate system, wherein the second coordinate system intersects a pivot shaft of the actuator mechanism and has a y-axis in alignment with a longitudinal axis of a track accessing arm of the actuator mechanism and an x-axis normal to the y-axis; and calculating a total mass unbalance of the actuator mechanism as a function of the first x (C X1 ) and y (C Y1 ) components and the second x (C X2 ) and y (C Y2 ) components.