A liquid discharge apparatus includes a discharge portion, a movement portion, and a control portion capable of executing an image forming operation of forming an image on the medium by a discharge operation of causing the discharge portion to discharge the liquid and a movement operation of causing the movement portion to move the medium and the discharge portion relatively to each other in a movement direction. The control portion is capable of changing a first amount of movement that is an amount of movement to be made by the movement operation to form a first image and a second amount of movement that is an amount of movement to be made by the movement operation to form a second image in a case where after the first image is formed, the second image is formed on the first image.

A sub-scanning distance in a case in which a gap between a recording head and a platen is broader than a second gap broader a first gap is lengthened more than a sub-scanning distance in a case in which the gap is the first gap more when sub-scanning which is sub-scanning of a longer distance than a pitch of nozzles of a nozzle line in a sub-scanning direction is performed. A sub-scanning distance in a case in which the record density of a print image of a specific print region is second record density higher than first record density may also be lengthened more than a sub-scanning distance in a case in which the record density is the first record density when the sub-scanning which is the sub-scanning of the longer distance than the pitch of the nozzles of the nozzle line in the sub-scanning direction is performed.

Disclosed is a method of determining line feed error in an image forming apparatus for printing an image, said image forming apparatus comprising a print head having a head sensor configured to sense information from the image printed on a print medium, said method comprising the steps of printing a first swath of the image on the print medium, repositioning the print head relative to the print medium by at least one line feed distance, determining a line feed error based upon information sensed from the printed first swath by the head sensor, and printing, using the determined line feed error, a second swath of the halftone image on the print medium.

A printing system includes a media transport device to move a medium at a speed ranging from about 15.24 mpm to about 609.6 mpm. The system includes an ink applicator to apply ink on the medium, and a treatment applicator to apply a treatment composition (including liquid vehicle, polyvalent metal salt fixing agent, and latex resin having an acid number less than 20) before or after the ink is applied, to form a printed-on medium. The system further includes a heating system programmed to: i) dry the printed-on medium at a predetermined temperature for a reduced dwell time (from about 1 second to about 40 seconds); and ii) leave residual moisture in the printed-on medium for a predetermined time after the reduced dwell time. The residual moisture is at a level that is higher than an initial moisture content of the medium prior to treatment composition and ink application.

A sub-scanning distance in a case in which a gap between a recording head and a platen is broader than a second gap broader a first gap is lengthened more than a sub-scanning distance in a case in which the gap is the first gap more when sub-scanning which is sub-scanning of a longer distance than a pitch of nozzles of a nozzle line in a sub-scanning direction is performed. A sub-scanning distance in a case in which the record density of a print image of a specific print region is second record density higher than first record density may also be lengthened more than a sub-scanning distance in a case in which the record density is the first record density when the sub-scanning which is the sub-scanning of the longer distance than the pitch of the nozzles of the nozzle line in the sub-scanning direction is performed.

A printer using heat to print on a print medium improves a print processing speed over an entire print surface of a print medium. In print processing of a label (PL), the feeding speed at a print region (SW) for printing a barcode or the like is slower than a standard feeding speed, and the feeding speed at a margin region (SY) that has a length that is at least a predetermined length in the feeding direction (F) among the margin regions is faster than the standard feeding speed. Further, the feeding speed at a printing area (NW) for printing character, symbol, or the like, and the feeding speed at a margin region (NY) that has a length smaller than the predetermined length in the feeding direction (F) are set to the standard feeding speed. Accordingly, the print processing speed over the entire print surface of the label (PL) may be improved in the printer using heat to print on a label (PL).

A sub-scanning distance in a case in which a gap between a recording head and a platen is broader than a second gap broader a first gap is lengthened more than a sub-scanning distance in a case in which the gap is the first gap more when sub-scanning which is sub-scanning of a longer distance than a pitch of nozzles of a nozzle line in a sub-scanning direction is performed. A sub-scanning distance in a case in which the record density of a print image of a specific print region is second record density higher than first record density may also be lengthened more than a sub-scanning distance in a case in which the record density is the first record density when the sub-scanning which is the sub-scanning of the longer distance than the pitch of the nozzles of the nozzle line in the sub-scanning direction is performed.

A tape printer. With a position of tape being in a detection position of a sensor, the printer causes a drive motor to rotate in one direction of a first rotation direction and a second rotation direction by a first rotation amount and then causes the drive motor to rotate in a reverse direction. The printer measures a detected rotation amount that is the amount of rotation of the drive motor from when the drive motor starts rotating in the reverse direction to when the passage of the specific position of the tape through the detection position is detected. The tape printer calculates an idle feed amount based on the measured detected rotation amount and the first rotation amount. The idle feed amount is the amount of rotation of the drive motor from the reversal of rotation of the drive motor until the start of rotation of a platen roller.

A printing apparatus includes: a printing unit; a feeding roller that feeds a print medium; a feeding-side movable roller that applies tension to the print medium, in a feeding-side buffer region positioned between the feeding roller and the printing unit; a front drive roller that is positioned between the feeding-side buffer region and the printing unit and with which the print medium is intermittently transported; and a control unit that controls feeding by the feeding roller. Control amounts controlled by the control unit include a feeding amount and a feeding speed of the feeding by the feeding roller. The control unit is configured to execute and switch between a print mode and a continuous transport mode, controls the feeding amount of the feeding roller when the print mode is executed, and controls the feeding speed of the feeding roller when the continuous transport mode is executed.

A sheet supplied from a roll is conveyed by a first conveyance unit and a second conveyance unit located on a downstream side of the first conveyance unit. The sheet is conveyed by a first conveyance amount while being inspected by a sensor for a spliced portion, which is a splice between sheets, and in a case where the spliced portion is not detected while the sheet is conveyed by the first conveyance amount, the first conveyance amount is changed in a control operation of causing a head to start ejecting liquid onto the sheet.