Patent ID: 8531183
Filing Date: 2013-09-10
Classification: G01B,G01D

Abstract:
1. A control method of a rotary encoder comprising a rotation angle detecting unit provided with a plurality of rotation angle detecting members, each of which has a given count value, the control method comprising: obtaining an assumed angle and an actual angle of each of the plurality of rotation angle detecting members; determining a first rotation angle detecting member, the assumed angle and the actual angle of which differ from each other, among the plurality of rotation angle detecting members; determining a second rotation angle detecting member having the actual angle closest to the assumed angle of the first rotation angle detecting member; resetting the given count value of the second rotation angle detecting member to a new count value of the first rotation angle detecting member; and changing the actual angle of the first rotation angle detecting member via the new count value of the first rotation angle detecting member to reduce an angular error between the assumed angle and the actual angle of the first rotation angle detecting member.