METHOD OF SERVO-CONTROL OF STEPPING MOTOR OF FDD

摘要

The controller for controlling the step motor of the FDD with the feedback information supplied from an erase head comprises a read/ write coil (21), a read/write core (17) having a gap (11), a first erase core (18A) having an erase gas (19) with a first erase coil (22A), a second erase core (18B) having a second erase coil (22B) so that one read/write head and two erase heads are assembled at one body. The signals read by the erase heads are compared with each other to shift the head inward or outward from the central line of the track according to the compared signal.