Title:
【発明の名称】改良型ガルバノメータスキャナ
Document Type and Number:
Japanese Patent JP2003522968
Kind Code:
A
Abstract:
A galvanometer unit comprises a limited-rotation motor with a load element such as a mirror attached to a shaft extending from the motor. In a servo loop that controls the angular position of the mirror, a position-sensor attached to the shaft provides position feedback information. The sensor includes a rotor which is positioned at the null point of the fundamental torsional resonance mode of the rotating system, thereby essentially eliminating feedback components resulting from the resonance. If the motor armature is supported for rotation on ball or roller bearings, the controller for the motor causes complete rotation of the armature from time to time, thereby distributing bearing wear around the bearing races and prolonging the useful life of the bearings.
Inventors:
Brown, david, sea
Stackers, felix
Stackers, felix
Application Number:
JP2001535107A
Publication Date:
July 29, 2003
Filing Date:
November 01, 2000
Export Citation:
Assignee:
GS Lumonix, Inc.
GS Lumonix, Inc.
GS Lumonix, Inc.
International Classes:
G02B26/02; G02B26/10; H02K5/16; H02K7/14; H02K26/00; (IPC1-7): G02B26/10; H02K5/16; H02K7/14
Attorney, Agent or Firm:
Kaoru Furuya (2 outside)