A liquid discharge apparatus includes: an applicator configured to apply a first liquid onto a surface of a fabric medium to increase repellency of the surface of the fabric medium; a head configured to discharge a second liquid onto the surface of the fabric medium, onto which the first liquid has been discharged; a detector configured to detect the repellency of the surface of the fabric medium on which the first liquid has been discharged; circuitry configured to: determine whether the repellency detected by the detector is equal to or larger than a predetermined repellency; and control the applicator to further apply the first liquid onto the surface of the fabric medium in response to a determination in which the repellency detected by the detector is lower than the predetermined repellency.

There is provided a liquid discharge apparatus including: a liquid discharge head, a carriage, a carriage moving mechanism, a carriage motor, an output unit outputting a discharge determination signal, and a controller configured to carry out a determination of whether or not a liquid is discharged normally from the nozzle, based on the discharge determination signal outputted from the output unit when the liquid discharge head carries out an inspection driving. If a first condition is satisfied, then after a carriage drive in order to move the carriage to a predetermined position, the inspection driving is performed. If a second condition other than the first condition is satisfied, then the inspection driving is performed without performing the carriage drive.

In some examples, a fluid-ejection device can include a fluidic tube to fluidically connect to a fluid supply, a carriage having a fluidic interconnector fluidically connectable to the fluidic tube and movable between a first position and a second position, a receiver to receive an air purger, wherein the air purger, when present, is coupled to the receiver and fluidically connectable to the fluidic interconnector, and a controller to cause the carriage to actuate from the first position to the second position, determine a location of the carriage at the second position, and based on the location of the carriage at the second position, detect a status of the air purger, a status of an engageable lock in the air purger, or both.

A liquid ejecting apparatus includes a liquid ejecting unit having nozzles able to eject a first liquid to a medium; and a fluid ejecting device having ejection ports able to eject a fluid including a second liquid to the liquid ejecting unit, in which the fluid ejecting device performs, as a maintenance operation of the liquid ejecting unit, a first fluid ejection of ejecting a fluid including small droplets of the second liquid that are smaller than a nozzle opening to an opening region in which the nozzles of the liquid ejecting unit open, and a second fluid ejection of ejecting a fluid including droplets of the second liquid in which the smallest droplets are larger than the small droplets to the liquid ejecting unit.

A printing apparatus includes: a printer that performs printing on a printing medium; and a sensor that outputs a detection signal while the printing apparatus moves relative to the printing medium.

The printing apparatus determines whether the sensor is above a first surface or above a second surface of the printing medium, based on the detection signal output from the sensor, the first surface being a surface on which a moving amount of the printing apparatus with respect to the printing medium is acquired, and the second surface being a surface on which the moving amount is not acquired, and if the sensor is determined to be above the second surface, controls printing on the printing medium by the printer according to an estimated value of the moving amount with respect to the printing medium.

An inkjet printer includes a carriage motor that moves a carriage, a carriage driving part that drives the carriage motor, a control value calculating part that calculates a total control value (Wt) composed with a control value for a feedback control and a control value for a feedforward control, which are respectfully referred as a feedback control value (Wb) and a feedforward control value (Wf), and an abnormality judging part that judges whether an abnormality has occurred to the carriage movement based on whether a proportional component (Wp) of the feedback control value has exceeded a threshold value.

A print bar for a for a multi-pass printer, the print bar comprising a static part configured to extend across a print area of a print target and a moveable part comprising a print bar beam and printer comprising such a print bar.

A controller performs: correcting a pre-correction pulse signal and outputting the corrected pre-correction pulse signal as a post-correction pulse signal that switches between third and fourth levels, the correcting including: switching the post-correction pulse signal from the third to fourth level when first or second condition is satisfied, the first condition being that the pre-correction pulse signal switches from the first to second level, the second condition being that duration of the third level exceeds a first reference period; and switching the post-correction pulse signal from the fourth to third level when both of third and fourth conditions are satisfied, the third condition being that duration of the fourth level exceeds a second reference period, the fourth condition being that the pre-correction pulse signal is on the first level; and calculating a relative moving velocity of the moving device based on temporal changes between the third and fourth levels.

In a control system, a controller is configured to determine presence or absence of an obstructed area within the intermediate section, and control movement of the moving body in accordance with a selected one of controlling methods including a first and a second control methods. The first control method causes the moving body to move at a first constant speed in the processing section defined within the intermediate section and at a second constant speed faster than the first constant speed in at least a part of a non-processing section within the intermediate section and other than the processing section, the first control method being selected when the obstructed area is absent. The second control method causes the moving body to move at the first constant speed in the processing section and the non-processing section, the second control method being selected when the obstructed area is present.

A printing apparatus that includes a printhead and a carriage can perform a detection operation for detecting a voltage to determine whether current leakage occurs. The printing apparatus includes a supply unit configured to supply, to the printhead, a voltage which is used to perform the print operation, a power line for connecting the printhead and the supply unit, a monitor unit configured to monitor a voltage appearing on the power line, and a control unit configured to perform a detection operation for detecting the voltage monitored by the monitor unit. The control unit performs the detection operation in a case that a movement of the carriage is reversed, in a case that a sensor detects that a jam has occurred, in case where the printhead is mounted to the carriage, or after and before a cleaning operation.