Patent ID: 6453722
Filing Date: 2002-09-24
Classification: G11B

Abstract:
A method of dynamically characterizing a desired component on an actuator assembly, the method comprising steps of:(a) mounting the actuator assembly on a test platform, the test platform having; (a)(1) a motion sensor coupled to the actuator assembly; (a)(2) a coil driver coupled to the actuator assembly; (a)(3) a microcontroller coupled to the motion sensor; (a)(4) a computer coupled to the microcontroller, wherein the microcontroller receives displacement and velocity feedback signals from the motion sensor and is programmed to perform PID control based on the feedback signals; (b) inputting a command from the computer to conduct a position test on the desired component of the actuator assembly wherein the position test includes: (b)(i) supplying a signal to the coil driver to cause movement of the desired component on the actuator assembly; (b)(ii) aiming the motion sensor at the desired component on the actuator assembly; (b)(iii) sensing displacement feedback from the desired component with the motion sensor; and (b)(iv) collecting a current sense signal from the coil driver and displacement feedback from the motion sensor with the signal analyzer.