Patent ID: 7272090

Claim:
A method of compensating tilt with a tilt adjuster in an optical recording device that uses a phase-locked loop to monitor speed of an optical recording medium, comprising: obtaining a first count of a number of times of unlocking of the phase-locked loop circuit; moving the tilt adjuster in a first direction from an original position to a first position if the first count of the number of times of unlocking of the phase-locked loop circuit is greater than an allowable number of times; obtaining a second count of the number of times of unlocking of the phase-locked loop circuit; moving the tilt adjuster to a second position in a second direction opposing the first direction if the second count of the number of times of unlocking of the phase-locked loop is greater than the allowable number of times; obtaining a third count of the number of times of unlocking of the phase-locked loop circuit; and resetting the tilt adjuster back to the original position if the third count of the number of times of unlocking of the phase-locked loop is greater than the allowable number of times.