摘要:
An image forming apparatus including a first carriage having a print head independently movable in a main scanning direction, a second carriage having a print head movable with the first carriage, an encoder sheet, first and second home position reference units provided to the first and second carriages, a home position detector that detects the first and second home position reference units, and first and second position detectors provided to the first and second carriages, which detect positions of the first and second carriages by reading the encoder sheet. A control unit controls ejection of ink from the print head of the first carriage based on an output from the first position detector, and ejection of ink from the print head of the second carriage based on the output from the second position detector.
摘要:
A recording device including a paper feeder tray that accommodated a recording medium, a print head that discharges ink on the recording medium to record an image thereon, a transfer roller that transfers the recording medium and a printed test chart on which multiple marks are arranged, a control device that controls the transfer roller, a first detection device that detects a rotation position of the transfer roller, a second detection device that detects the multiple marks arranged on the printed test chart, and a transfer device that transfers the recording medium from the paper feeder tray to the second detection device, wherein the control device obtains an difference between an actual transfer amount of each of the multiple marks obtained by detecting the multiple marks by the second detection device and a predetermined theoretical transfer amount of each of the multiple marks relating to a rotation position of the transfer roller, calculates a correction amount for the rotation amount of the transfer roller based on a relationship between the rotation position of the transfer roller and the difference, and controls the rotation amount of the transfer roller using the correction amount.
摘要:
An image forming apparatus including a first carriage having a print head independently movable in a main scanning direction, a second carriage having a print head movable with the first carriage, an encoder sheet, first and second home position reference units provided to the first and second carriages, a home position detector that detects the first and second home position reference units, and first and second position detectors provided to the first and second carriages, which detect positions of the first and second carriages by reading the encoder sheet. A control unit controls ejection of ink from the print head of the first carriage based on an output from the first position detector, and ejection of ink from the print head of the second carriage based on the output from the second position detector.
摘要:
A recording apparatus includes a carriage; a first head group including a recording head and disposed on the carriage; and a second head group including a recording head and disposed on the carriage adjacent the first head group in a staggered manner with respect to a sub-scan direction. The carriage is configured to move in a main scan direction in order to record an image on a recording medium. The recording apparatus further includes a forming unit configured to form plural test patterns including a first pattern formed by the recording head of the first head group and a second pattern formed by the recording head of the second head group. The test patterns are spaced apart from one another in the sub-scan direction. The position of the second pattern relative to the first pattern in the sub-scan direction is varied successively from one test pattern to another.
摘要:
An image forming apparatus is disclosed that includes a recording head having a plurality of nozzles and scanning in forward and backward scanning directions to form dot images on the recording medium, an imaging unit imaging an image on the recording medium, a detection unit detecting a positional shift amounts of the dot images and inclination amounts of the recording head based on calibration image data obtained by imaging two first marks and two second marks in a single view by the imaging unit, and a correction unit correcting a drive of the recording head based on the detected positional shift amounts and the inclination amounts of the recording head.
摘要:
A liquid discharge apparatus includes a head having multiple nozzles arrayed in a nozzle array direction, a conveyor configured to convey a linear medium in a conveyance direction, circuitry configured to control the head to discharge a liquid droplet to the linear medium from the multiple nozzles based on image data, and a droplet detector configured to detect the liquid droplet discharged from the multiple nozzles. The circuitry is further configured to select discharge nozzles, from the multiple nozzles, used to discharge the liquid droplet to the linear medium according to a detection result of the droplet detector, and correct the image data according to the discharge nozzles selected by the circuitry.
摘要:
An image forming apparatus is disclosed that includes a recording head having a plurality of nozzles and scanning in forward and backward scanning directions to form dot images on the recording medium, an imaging unit imaging an image on the recording medium, a detection unit detecting a positional shift amounts of the dot images and inclination amounts of the recording head based on calibration image data obtained by imaging two first marks and two second marks in a single view by the imaging unit, and a correction unit correcting a drive of the recording head based on the detected positional shift amounts and the inclination amounts of the recording head.
摘要:
A recording device including a carriage head, a recording head installed onto the carriage head, the recording head having an array of nozzles that discharges ink on a recording medium, a transfer roller that transfers the recording medium in a direction along the array of nozzles, a control device that controls rotation of the transfer roller, a first detection roller that detects a rotation position of the transfer roller, and a second detection device that detects a mark printed on the recording medium by the recording head, the control device including a print control device that controls printing the marks on the recording medium in the direction along the array of nozzles from the array of nozzles of the recording head while the carriage and the transfer roller remain still, a calculation device that calculates a correction amount for use in correction of a rotation angle of the transfer roller according to a difference between an actual transfer amount of the recording medium by the transfer roller at a predetermined rotation position obtained by detection of the marks by the second detection device while the transfer roller is in rotation and a theoretical transfer amount of the recording medium at the predetermined rotation position, and a correction device that corrects the rotation angle of the transfer roller using the correction amount.