Patent ID: 7596824

Claim:
A controlling method of a drum type washing machine having a microcomputer programmed to control operations, the method comprising: performing washing and rinsing operations in accordance with a start command inputted by a user and a procedure selected by the user; performing a first eccentricity measurement operation; performing a first preliminary spin drying operation if the first eccentricity measurement is smaller than a first reference value; performing a second eccentricity measurement operation and comparing a second eccentricity measured at the second eccentricity measurement operation with the first reference value; re-performing the first eccentricity measurement if the second eccentricity is larger than the first reference value; comparing a first eccentricity measured at the re-performed first eccentricity measurement with a second reference value; performing a second preliminary spin drying operation without re-performing the first preliminary spin drying operation if the first eccentricity is smaller than the second reference value; and performing a main spin drying operation.