A printing apparatus includes a liquid ejecting unit capable of ejecting ink, which is a liquid, onto a medium and capable of reciprocating in a width direction (X-axis direction) of the medium, a medium support unit that supports the medium on a support face, a medium width detection unit that detects a width of the medium supported on the support face, a plurality of heating units that are provided along the width direction of the medium and heat the medium support unit, and a control unit capable of individually controlling the plurality of heating units. The control unit controls an output of each of the heating units in accordance with the width of the medium detected by the medium width detection unit.

A liquid ejecting system includes a head unit that includes a nozzle for ejecting a liquid, a pressure chamber communicating with the nozzle, and a drive element for applying pressure fluctuation to a liquid in the pressure chamber by supplying a drive pulse, an acquisition portion that acquires output information regarding a usage condition of the head unit, a first connection portion that is communicably connected to a server through a network, a first output portion that outputs the output information through the first connection portion, a first input portion to which input information regarding a waveform of the drive pulse supplied to the drive element is input through the first connection portion. A decision portion that decides the waveform of the drive pulse supplied to the drive element based on the input information.

A droplet discharging device includes a head including a nozzle configured to discharge a droplet onto a medium, a heater configured to heat, the medium onto which the droplet is discharged from the head, at a position opposing to the head, an air blowing fan configured to blow outside air from an outside toward an inside of a housing that accommodates the head and the heater, a temperature sensor configured to detect a temperature of the outside air blown by the air blowing fan, and a control unit, and when the temperature of the outside air detected by the temperature sensor is lower than a preset temperature, the control unit changes a set temperature of the heater to a temperature lower than a predetermined temperature.

A jet parameter generation system according to an embodiment of the present disclosure includes a data acquisition section, and a parameter generation section for generating a predetermined jet parameter, using a predetermined analytical method of taking a predetermined input parameter as an explanatory variable and taking a predetermined jet parameter as an objective variable. The parameter generation section determines which one of a first standard for setting a voltage value with which a drop volume of the liquid to be a reference is obtained and a second standard for setting a voltage value with which an ejection speed of the liquid to be a reference is obtained is to be selected, selects a first explanatory variable group when determining to select the first standard, while selecting a second explanatory variable group when determined to select the second standard, and uses the predetermined analytical method using just selected one of the first explanatory variable group and the second explanatory variable group to thereby generate the predetermined jet parameter.

In a printing apparatus, an indefinite area in which slits are not formed is configured in a portion of a linear encoder scale in a rotation direction, and an adjustment unit, adjusts the timing of discharge from a printhead with respect to a first printing area out of a plurality of printing areas on a rotating member, without using a detection result of a first encoder sensor, based on a detection result of a second encoder sensor, the first encoder sensor being provided at a position corresponding to the indefinite area during a discharge of printing material with respect to the first printing, and the second encoder sensor being provided at a position that does not correspond to the indefinite area during the discharge of the printing material with respect to the first printing area.

A liquid injection device includes a driving signal correction circuit correcting a reference driving signal based on a temperature detected by a temperature sensor. The driving signal correction circuit includes a first correction circuit that corrects injection pulses excluding a liquid drop injection speed-controlling injection pulse when the temperature detected by the temperature sensor is lower than or equal to a predetermined reference temperature, and a second correction circuit that corrects all of the injection pulses when the temperature detected by the temperature sensor is higher than the predetermined reference temperature.

A liquid discharge device includes a liquid discharge head that includes a nozzle from which liquid is discharged and a liquid channel communicating with the nozzle, and that discharges liquid from the nozzle. The nozzle has an inner wall surface having an uneven pattern including a recess where the inner diameter of the nozzle is increased and a projection where the inner diameter of the nozzle is smaller than that in the recess. In a case where ink is continuously discharged from an identical nozzle, at a time when a meniscus in the nozzle after previous discharge is located closer to an initial position before discharge than a center position between the initial position and a position at which the meniscus is most greatly drawn toward the liquid channel, subsequent discharge is performed.

A controller of an inkjet printer: calculates second density correction values for respective nozzles arranged in a predetermined direction to print a second line of an image data, by using gray-level values of pixels in the second line of the image data corresponding to the respective nozzles and first density correction values for the respective nozzles to print a first line of the image data printed immediately prior to the second line; and corrects the gray-level values of the pixels in the second line of the image data corresponding to the respective nozzles, by using the calculated second density correction values.

A liquid discharge apparatus includes a liquid discharge head and a head drive controller. The liquid discharge head includes an actuator including an electromechanical transducer element. The head drive controller controls the liquid discharge head. The head drive controller includes a drive waveform generator and a voltage updater. The drive waveform generator generates a drive waveform to be applied to the electromechanical transducer element. The voltage updater updates a voltage value of the drive waveform to a larger value with an elapse of time. The voltage updater sets a time interval of update of the voltage value to be longer as a number of times of the update is greater.

A drive waveform determination method includes: a first acquisition step of executing first acquisition processing for acquiring, in a first environment condition which is a condition of an environment in which a liquid ejection head is provided, first information on an ejection characteristic of a liquid when each of a plurality of drive waveform candidates is applied to a drive element; a second acquisition step of executing second acquisition processing for acquiring, in a second environment condition which is a condition of the environment in which the liquid ejection head is provided and is different from the first environment condition, second information on the ejection characteristic when each of the plurality of drive waveform candidates is applied to the drive element; and a waveform determination step of determining a drive waveform based on the first information and the second information.