Title: Method and system of detecting eccentricity and up/down movement of a code wheel of an optical encoder set
Application Number: 200610127062 Application Date: 2006.09.26
Publication Number: 1940489 Publication Date: 2007.04.04
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01D18/00
Applicant(s) Name: Avago Technologies ECBU IP Sin Address:
Inventor(s) Name:
Attorney & Agent: lirui hai
Abstract:
    A system and method of measuring a rotational motion of a code wheel measures a rotational movement of the code wheel including an error component due to a non-rotational movement of the code wheel; measures the non-rotational movement of the code wheel; and produces an error-corrected measurement of the rotational movement of the code wheel by using the measured non-rotational movement of the code wheel to cancel the error component of the measured rotational movement of the code wheel. A signal can be produced indicating a need for maintenance when the non-rotational movement of the code wheel exceeds a threshold.
Time: 5