Carriage Moving Device, Method and Computer-Readable Recording Medium Containing Instructions to Execute Carriage Moving Method

摘要

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.

主权项

1. A carriage moving device, comprising:
a motor; a carriage movable in a scanning direction, the carriage moving in a first direction along the scanning direction when the motor rotates forwardly, the carriage moving in a second direction which is opposite to the first direction when the motor rotates reversely; a facing object configured to face the carriage, the facing object having a plurality of reflection ratios at a plurality of positions in the scanning direction; a first sensor unit mounted on the carriage at a position where the first sensor unit faces the facing object, the first sensor unit having 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, the first sensor unit being configured to output a first signal corresponding to a light amount of the light received by the light receiving unit; and a second sensor unit configured to output a second signal in response to movement of the carriage; a controller, which is configured to execute:
a carriage moving process in which the controller controls the motor to forwardly rotate to move the carriage in the first direction;a reversing process in which the controller controls the motor to reversely rotate to move the carriage in the second direction with controlling the light emitting unit to emit light in response to a condition where a time period during which the second signal cannot be obtained during the carriage movement process; anda notification process in which 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.