Carriage moving device, method and computer-readable recording medium containing instructions to execute carriage moving method
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United States of America Patent
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Sep 22, 2015
Grant Date -
Apr 2, 2015
app pub date -
Sep 24, 2014
filing date -
Sep 30, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A carriage moving device has a motor, and a carriage. The carriage moves in a first direction when the motor rotates forwardly, while the carriage moves in a second direction which is opposite to the first direction when the motor rotates reversely. The carriage moving device further includes a facing object having a plurality of reflection ratios at a plurality of positions in the scanning direction. A first sensor unit has a light emitting unit configured to emit light to the facing object and a light receiving unit configured to receive light reflected by the facing object. A second sensor unit is configured to output a second signal in response to movement of the carriage. The controller notifies an error of the second sensor unit in response to a condition where a changing amount of the first signal in the reversing step exceeds a threshold amount and the controller cannot obtain the second signal.
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