ENCODER, DRIVING DEVICE, AND ROBOT APPARATUS
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United States of America Patent
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Issued Date -
Jun 6, 2013
app pub date -
Oct 11, 2012
filing date -
Oct 12, 2010
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Abstract
An encoder includes: a first scale which has a first index portion; a second scale which has a second index portion; a first detection unit which outputs a first signal based on the first index portion, regarding first relative rotation between a fixing member and a first rotating member; a second detection unit which outputs a second signal based on the second index portion, regarding second relative rotation between the fixing member and a second rotating member; and a signal-processing unit which calculates information regarding the first relative rotation on the basis of the first signal and which calculates information regarding the second relative rotation on the basis of the second signal.
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