An ejection apparatus includes an ejection head having an ejection port, a droplet detection unit, an acquisition unit, a control unit, and a decision unit. The droplet detection unit detects that a droplet ejected from the ejection port has reached a predetermined position. The acquisition unit acquires information regarding a velocity of movement of the detected droplet. The control unit controls the ejection head to eject the droplet from the ejection port. The decision unit decides a number of consecutive ejections of a plurality of droplets from the ejection head based on the acquired information regarding the velocities of each of the plurality of droplets ejected consecutively and detected by the droplet detection unit. If the acquisition unit acquires the information regarding velocities of detected droplets, the control unit controls the ejection head to consecutively eject the droplets from the ejection head based on the decided number of consecutive ejections.

Techniques for determination of size of printable medium are described. In an example, a printing device includes an adjuster that is movable based on a size of a printable medium to be fed to the printing device. A first element is coupled to the adjuster and moves with the adjuster to indicate a position of the adjuster. A second element is movable relative to the adjuster. A position signal indicative of a distance between the second element and the first element is generated. The position signal can be used to determine the size of the printable medium.

A recording apparatus includes a white ink jet head, a non-white ink jet head, and a control section that controls performing recording by performing a main scan a plurality of times in which, while a position of an ink jet head relative to the recording medium is moved, an ink composition is ejected from the ink jet head and is applied to the recording medium. The control section performs recording in a first recording mode in which the white ink composition and the non-white ink composition are applied to the same scan region of the recording medium by the same main scan and recording in a second recording mode in which the white ink composition and the non-white ink composition are applied to the same scan region of the recording medium by different main scans.

An example device includes a printhead including a first print element to print a first color to a print medium and a second print element to print a second color to the print medium. The second print element is spaced apart from the first print element by an offset distance. The device further includes a controller communicatively coupled to the printhead. The controller is to control the printhead to print an image, and in response to receiving a signal to stop printing the image, control the first print element to stop printing the first color to the print medium and control the second print element to continue printing the second color to the print medium.

A printer includes a platen, a first head, a second head, a first lamp, and a second lamp. The first head, the second head, the first lamp, and the second lamp are moved relatively with respect to the platen in a main scanning direction, and the platen is moved from the second head toward the first head relatively with respect to the first head, the second head, the first lamp, and the second lamp, repeatedly. The second head ejects the second ink onto the object to be printed placed on the platen while the first head, the second head, the first lamp, and the second lamp are moving in the main scanning direction. The first lamp irradiates light onto the second ink on the object to be printed while the first head, the second head, the first lamp, and the second lamp are moving in the main scanning direction.

A recording apparatus includes an ink tank, a carriage, a recording head mounted on the carriage, a carriage control unit, and a supply tube connected to the recording head and the ink tank and including a bent portion that moves with carriage movement. The carriage control unit moves the carriage in predetermined directions to record on a recording medium. Assuming that, of an acceleration/deceleration area of a carriage moving area, an area in which pressure changes to decrease negative pressure in the recording head is a first area, and an area in which the pressure changes to increase the negative pressure in the recording head is a second area, the carriage control unit moves the carriage so that an absolute value of acceleration or deceleration of the carriage in the first area is less than an absolute value of acceleration or deceleration of the carriage in the second area.

There is provided a liquid discharge apparatus including: a liquid discharge head; a relative movement mechanism performing relative movement between the liquid discharge head and a medium; a velocity signal output circuit; and a controller performing a constant velocity discharge operation and an acceleration/deceleration discharge operation. In the constant velocity discharge operation, the controller determines a discharge timing based on information about a representative value of relative velocity obtained based on a plurality of pieces of preceding velocity information. Further, in the acceleration/deceleration discharge operation, the controller obtains approximate information in which a change in the relative velocity is approximated based on distribution of the relative velocity, and the controller determines a discharge timing based on the approximate information.

A liquid discharge apparatus includes: an ink composition containing 2-pyrrolidone and an alcohol having a main chain having 6 or less carbon atoms; a liquid discharge unit configured to discharge the ink composition from a nozzle formed in a nozzle surface; and a wiping unit configured to wipe the nozzle surface. The wiping unit includes a wiping member including protrusion-shape fibers. Each of the protrusion-shape fibers has a protruded portion in a cross-section orthogonal to a fiber axis thereof. The protruded portion is continuous in a direction along the fiber axis.

A printing apparatus include a carriage mounted with a printing unit, a belt, a first motor configured to drive the belt at one end in the widthwise direction, a second motor configured to drive the belt at the other end in the widthwise direction, and a control unit configured to control the first motor and the second motor. The control unit performs first control by driving the first motor in which the carriage moves from a state in which the carriage is stopped. In the first control, an output of the second motor is controlled from a first state lower than an output of the first motor to a second state higher than the first state.

The control portion controls (i) a discharging operation of discharging the liquid from the plurality of nozzles by driving the plurality of energy generation elements and (ii) a pressurization operation of pressurizing the liquid from the individual flow path side in a state in which the plurality of nozzles are sealed by the sealing portion.