Title:
CONTROL DEVICE FOR ACTUATOR AND CONTROL METHOD FOR ACTUATOR
Document Type and Number:
Japanese Patent JP2015023675
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To highly accurately control the drive of an actuator.SOLUTION: A control device comprises: a memory 123 that stores correction information set for each rotated position of a rotary encoder having an encoder magnet 108 attached to the rotation shaft 109 of a stepping motor 104, and having a pattern line corresponding to the rotated position, and also having a hole IC105a that detects the pattern line; a photo-sensor 106 that detects the reference position of the stepping motor; and a lens CPU 101 that corrects the output of the hole IC by using the reference position and correction position, and controls the drive of the stepping motor on the basis of information after the correction. The correction information is acquired when the reference position is detected. The lens CPU rotates the encoder magnet via the stepping motor by an amount of stroke that is able to acquire the correction information.
Inventors:
SAITO NAOKI
Application Number:
JP2013149992A
Publication Date:
February 02, 2015
Filing Date:
July 19, 2013
Export Citation:
Assignee:
CANON KK
International Classes:
H02P8/18; G02B7/04; G02B7/08; H02P8/00; H02P29/00
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsuya Mizumoto
Michiya Hirayama
Atsuya Mizumoto
Michiya Hirayama