Patent ID: 6217425
Filing Date: 2001-04-17
Classification: B24B,G11B,Y10T

Abstract:
An apparatus for lapping a workpiece including a plurality of magnetic heads supported by a tool, the apparatus comprising:a rotary lapping table having an abrasive surface;lapping head attachment means provided so as to be movable with respect to the lapping table;an adjuster ring resiliently supported by the lapping head attachment means so as to contact with the abrasive surface;a lapping head attached to the adjuster ring, the attitude of the lapping head being controlled by the adjuster ring;a tilting assembly attached to the lapping head so as to tilt around a tilt shaft parallel with the abrasive surface;tilting assembly drive means for tilting the tilting assembly with respect to the abrasive surface;a lift assembly movable up and down with respect to the tilting assembly;a back plate pivotally attached to the lower portion of the lift assembly, said tool being attached to the back plate;first actuator means for correcting balance by applying forces on right and left sides of the pivotal point of the back plate; andsecond actuator means for correcting bow of the workpiece by applying operating forces on a plurality of predetermined locations of the tool so that the moving directions of movable parts of the second actuator means are substantially parallel with the directions of the operating forces.