An image forming apparatus is configured to detect, from image data of a recording medium on which a plurality of marks are printed, positions of outer edges being edges closer to ends of the image data and positions of inner edges being inside edges not closer to the ends of the image data in both of a first direction and a second direction different from the first direction; identify, with respect to a target mark for which a reference position is to be detected and two marks adjacent to the target mark, first line segments connecting positions of inner edges and second line segments connecting positions of outer edges; and detect, as a reference position of the target mark, a midpoint of a line segment connecting an intersection of the two first line segments and an intersection of the two second line segments.

An image forming apparatus is configured to detect, from image data of a recording medium on which a plurality of marks are printed, positions of outer edges being edges closer to ends of the image data and positions of inner edges being inside edges not closer to the ends of the image data in both of a first direction and a second direction different from the first direction; identify, with respect to a target mark for which a reference position is to be detected and two marks adjacent to the target mark, first line segments connecting positions of inner edges and second line segments connecting positions of outer edges; and detect, as a reference position of the target mark, a midpoint of a line segment connecting an intersection of the two first line segments and an intersection of the two second line segments.

A printing apparatus includes a printing unit configured to perform printing on a recording target, a projection unit configured to project a printing sample image onto the recording target, a detection unit configured to detect a user operation within a projection area into which the projection unit is configured to perform projection, and a control unit configured to control the printing unit based on a printing condition, wherein the control unit changes the printing condition, based on the user operation that is detected by the detection unit.

A printing apparatus includes a printing unit configured to perform printing on a recording target, a projection unit configured to project a printing sample image onto the recording target, a detection unit configured to detect a user operation within a projection area into which the projection unit is configured to perform projection, and a control unit configured to control the printing unit based on a printing condition, wherein the control unit changes the printing condition, based on the user operation that is detected by the detection unit.

A printing apparatus includes a carriage mounted with a printing unit configured to perform printing on a print medium, a first motor used to move the carriage, a second motor used together with the first motor to move the carriage, and a control unit configured to control the first motor and the second motor. When moving the carriage, the control unit controls the first motor with a first control amount and controls the second motor with a second control amount. The first control amount and the second control amount are different from each other, and a ratio therebetween is a predetermined ratio.

A printing apparatus includes: a carriage mounted with a printing unit; a first motor configured to move the carriage in a predetermined direction; a second motor configure to move the carriage in the predetermined direction; and a control unit. The control unit executes a first mode in which, when causing the printing unit to perform printing under a first printing condition, the first motor is driven in a first direction and the second motor is driven in a second direction, and a second mode in which, when causing the printing unit to perform printing under a second printing condition different from the first printing condition, the first motor is driven in the first direction and the second motor is driven in the second direction while changing an output ratio between the first motor and the second motor.

A job processing system includes a host computer and an image forming apparatus connected via a network with each other, the host computer includes a job register acceptor that accepts a job register and a communication device that sends the job register to the image forming apparatus, the image forming apparatus includes a display controller and a job execution controller, the job execution controller controls sequential execution of a plurality of jobs shown in the changed job register in accordance with an execution order of the plurality of jobs, and the display controller keeps from making an update to cause a display of the changed job register immediately after a network interface device receives the changed job register, but makes an update to cause a display of the changed job register when a predetermined display updating condition is achieved after the receipt of the changed job register.

A conveyance apparatus includes a liquid discharge head unit, a conveyance rotator, and a plurality of detection devices. The liquid discharge head unit discharge liquid to an object conveyed in a conveyance direction. The conveyance rotator conveys the object. The plurality of detection devices output a detection result indicating a position of the object. The adjacent two of the plurality of detection devices are spaced at a prescribed distance. The prescribed distance is an integral multiple of a circumference of the conveyance rotator.

An integrated circuit to drive a plurality of actuators during a non-reset operating condition is disclosed. The integrated circuit includes a reset input to receive a reset signal activated for a duration. The reset signal generates a reset condition in the integrated circuit during which the non-reset operating condition is blocked. The integrated circuit also includes a monitor circuit operably coupled to the reset input to indicate if the duration of the reset signal meets or exceeds a selected duration.

An integrated circuit to drive a plurality of actuators during a non-reset operating condition is disclosed. The integrated circuit includes a reset input to receive a reset signal activated for a duration. The reset signal generates a reset condition in the integrated circuit during which the non-reset operating condition is blocked. The integrated circuit also includes a monitor circuit operably coupled to the reset input to indicate if the duration of the reset signal meets or exceeds a selected duration.