Patent ID: 6061201
Filing Date: 2000-05-09
Classification: G11B

Abstract:
In a disc drive system having a transducer with a read element that reads information from a track to produce a read signal and a write element that writes information to the track, a method of measuring a radial read-to-write offset between the read and write elements at a track on a disc surface of a disc in the disc drive system comprising:writing a test signal to the track at a predetermined actuator offset;incrementally moving the read element across a width of the track to measure a maximum amplitude in the read signal;incrementally moving the read element across the width of the track to find first and second actuator offsets where the read signal has an amplitude approximately equal to a predetermined percentage of the maximum amplitude;calculating a midpoint between the first and second actuator offsets; andsetting the radial read-to-write offset equal to a difference between the midpoint and the predetermined actuator offset.