Method of obtaining correction value of optical sensor and recording apparatus
First Claim
1. A method of obtaining a correction value used for correcting a detection error in an optical sensor opposing a transport path in which a medium is transported and operable to detect a change in optical reflectance of the transport path to thereby detect an edge of the medium so as to generate detection information, the method comprising:
- acquiring edge information on an edge position of one of opposite edges of the medium based on the detection information;
recording on the medium a correction value obtainment pattern including a plurality of lines that are arranged at a fixed interval in a first direction and parallel to a second direction perpendicular to the first direction and that include a reference line which is located at a position spaced a first distance from the edge position in the first direction and which is parallel to the second direction, based on the edge information;
selecting one line from the plurality of lines of the correction value obtainment pattern to specify a line which is located at a position spaced a second distance from the edge position in the first direction and which corresponds to one of the plurality of lines of the correction value obtainment pattern, by means of actual measurement performed by an operator;
obtaining a third distance in the first direction between the specified line and the reference line, based on line information on the specified line; and
determining the third distance as an absolute value of the correction value.
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Accused Products
Abstract
A method of obtaining a correction value of an optical sensor detecting an edge of the medium so as to generate detection information, includes: acquiring edge information on an edge position of one of opposite edges of the medium based on the detection information; forming on the medium a correction value obtainment pattern including lines that are arranged at a fixed interval in a first direction and parallel to a second direction perpendicular to the first direction and that include a reference line spaced a first distance from the edge position in the first direction and parallel to the second direction, based on the edge information; specifying a line spaced the first distance from the edge position in the first direction; obtaining a second distance in the first direction between the specified line and the reference line; and determining the second distance as an absolute value of the correction value.
25 Citations
16 Claims
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1. A method of obtaining a correction value used for correcting a detection error in an optical sensor opposing a transport path in which a medium is transported and operable to detect a change in optical reflectance of the transport path to thereby detect an edge of the medium so as to generate detection information, the method comprising:
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acquiring edge information on an edge position of one of opposite edges of the medium based on the detection information; recording on the medium a correction value obtainment pattern including a plurality of lines that are arranged at a fixed interval in a first direction and parallel to a second direction perpendicular to the first direction and that include a reference line which is located at a position spaced a first distance from the edge position in the first direction and which is parallel to the second direction, based on the edge information; selecting one line from the plurality of lines of the correction value obtainment pattern to specify a line which is located at a position spaced a second distance from the edge position in the first direction and which corresponds to one of the plurality of lines of the correction value obtainment pattern, by means of actual measurement performed by an operator; obtaining a third distance in the first direction between the specified line and the reference line, based on line information on the specified line; and determining the third distance as an absolute value of the correction value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A recording apparatus comprising:
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a transporter, operable to transport a recording medium in a transport path; an optical sensor, opposing the transport path, and operable to detect a change in optical reflectance of the transport path to thereby detect an edge of the recording medium so as to generate detection information; a controller, operable to acquire edge information on an edge position of one of opposite edges of the recording medium based on the detection information, the controller operable to cause a recording head to record on the recording medium a correction value obtainment pattern including a plurality of lines that are arranged at a fixed interval in a first direction and parallel to a second direction perpendicular to the first direction and that include a reference line which is located at a position spaced a first distance from the edge position in the first direction and which is parallel to the second direction, based on the edge information; and an ejector, operable to eject the recording medium on which the correction value obtainment pattern has been recorded, wherein the controller receives an input to select one line from the plurality of lines of the correction value obtainment pattern to specify a line which is located at a position spaced a second distance from the edge position in the first direction from among the plurality of lines of the correction value obtainment pattern, and the controller obtains an absolute value of a correction value used for correcting a detection error in the optical sensor in accordance with the input. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification