SHEET PROCESSING APPARATUS, AND METHOD AND COMPUTER-READABLE MEDIUM THEREFOR

摘要

A sheet processing apparatus including a controller configured to move a carriage from an initial position to such a position that an optical sensor traverses one of two side edges of a sheet in a scanning direction, in a direction along the scanning direction, in response to the sheet reaching a position opposed to the optical sensor, adjust a light emitting quantity of the optical sensor while the carriage is being moved, within a period from when the carriage begins to move from the initial position to when the optical sensor traverses the one side edge, calculate a position of the one side edge traversed by the optical sensor after the adjustment, based on detection values, corresponding to the light receiving quantity, output from the optical sensor after the adjustment, and identify edge positions of the two side edges based on the calculated position of the one side edge.

主权项

1. A sheet processing apparatus comprising:
a head configured to perform predetermined processing for a sheet; an optical sensor configured to emit light toward a sheet conveyance path along which the sheet is conveyed, and output a detection value corresponding to a light receiving quantity of reflected light received by the optical sensor; a carriage configured to carry the head and the optical sensor mounted thereon; a carriage moving mechanism configured to move the carriage along a scanning direction; and a controller configured to:
control the carriage moving mechanism to move the carriage from an initial position to such a position that the optical sensor traverses one of two side edges of the sheet in the scanning direction, in a single direction along the scanning direction, in response to the sheet reaching a position opposed to the optical sensor;adjust a light emitting quantity of the light emitted by the optical sensor, in a state where the carriage is being moved, within a period between a time when the carriage begins to move from the initial position and a time when the optical sensor traverses the one side edge of the sheet in the scanning direction;calculate a position, in the scanning direction, of the one side edge of the sheet traversed by the optical sensor after the adjustment of the light emitting quantity, based on detection values output from the optical sensor after the adjustment of the light emitting quantity; andidentify edge positions of the two side edges of the sheet in the scanning direction, based on the calculated position of the one side edge of the sheet in the scanning direction.