A printing unit includes: a sleeve and a print module received in the sleeve, the print module being slidably removable, in a first direction, from the sleeve. The print module includes a supply module and a replaceable printhead. The printhead is slidably removable, in a second direction, from the supply module, the first and second directions being non-parallel.

In a printing method, such as inkjet printing, at least one layer, such as a decor, etc. is printed on a surface by actuating a subset of a total number of individually actuatable discharge openings defined in a discharge surface of a printhead to eject defined quantities of one or more liquids onto the surface. All of the discharge openings in the actuated subset are spaced from respective points of impingement of the liquids on the surface between minimum and maximum clearances (B, C) from the respective points of impingement. The minimum clearance (B) is a minimum flight distance that each of the defined liquid quantities respectively requires to transform from a liquid column ejected from the respective actuated discharge opening into a substantially spherical liquid droplet. The maximum clearance (C) exceeds the minimum clearance (B) by a predetermined distance (t).

An electric apparatus for controlling movement of a target object by performing first and second feedback controls, based on a detection signal obtained from detecting the movement of the target object, generates an operation quantity on the target object based on first and second operation quantities for the second feedback control if one of a predetermined target value and an estimated first state quantity of the target object is higher than a first threshold value, and generates the operation quantity on the target object using only the first operation quantity from among the first and the second operation quantities if one of the target value and the first state quantity of the target object is lower than the first threshold value.

After an ejector passes an ejection end position, a controller controls a second conveyor to convey a sheet in a sub-scanning direction. The ejection end position is a position at which ink ejection by the ejector ends before reaching a turn position. An ejection start position is a position at which ink ejection by the ejector starts after turning at the turn position. Based on positional relationship between the ejection end position and a standard position, the controller adjusts timing of conveyance of the sheet or shift the turn position from the standard position in a direction of reducing an overlap between a sheet conveyance period after the ejector passes the ejection end position and an ejector deceleration period before the ejector reaches the turn position. The standard position is a standard turn position of the ejector and is determined from the ejection end position and the ejection start position.

The printing apparatus comprises: a print head having an ejection opening surface on which an ejection opening configured to eject ink is formed; a holder member that holds the print head; a moving unit configured to move the holder member; a fixing member that fixes the holder member; a detecting unit configured to detect a moving distance of the holder member; and a first determining part configured to determine that the holder member is fixed by the fixing member in a case where the moving distance detected by the detecting unit is less than a predetermined value.

An image forming apparatus includes a placement member, carriages, a support member, a driver and a hardware processor. The placement member has a placement surface. The carriages each include an image forming operation unit that performs an operation for forming an image on a recording medium placed on the placement surface. The support member supports the carriages such that the carriages are reciprocally movable along a predetermined movement path over the placement surface. The driver moves the carriages along the movement path independently from one another. In response to at least two of the carriages being moving along the movement path, the hardware processor controls the driver such that the number of carriages in a predetermined limit-imposed region of the movement path is equal to or less than a predetermined upper limit number that is less than the number of the carriages included in the image forming apparatus.

An electric apparatus for controlling movement of an object, detects the movement of the object, and estimates a control quantity for performing first feedback control for the object at a first period, based on a detection signal. The apparatus further generates, based on the detection signal, a timing signal for estimating a state quantity of the object in order to perform second feedback control for the object at a second period shorter than the first period, estimates the state quantity based on the timing signal, generates a first operation quantity for the first feedback control, based on the control quantity, generates a second operation quantity for the second feedback control, based on the state quantity, and generates an operation quantity of the object from the first operation quantity and the second operation quantity.

There is provided an image recording apparatus including an image recording head; a scanner; a conveyer; and a controller. The controller is configured to execute first and second recording modes in which the controller causes the image recording head to accelerate to first and second velocities, to move at the first and second velocities, and then to decelerate from the first and second velocities, while causing the image recording head to record the image at least during moving at the first and second velocities, respectively. In a case that the controller has determined, based on printing data, that the image is to be recorded during a first velocity changing period, the controller executes the second recording mode, the first velocity changing period includes a first acceleration and deceleration periods in which the image recording head accelerates and decelerate, respectively.

An image recording apparatus includes: a casing having an internal space; a conveying passage formed inside the casing; a first roller pair positioned in the conveying passage, having a driving roller and a driven roller, and configured to pinch a sheet and to convey the sheet in a conveying orientation; a platen positioned on a downstream side in the conveying orientation of the first roller pair, and having a supporting surface supporting the sheet; a recording part positioned above the platen and configured to record an image on the sheet supported by the platen; a second roller pair which is located on the downstream side in the conveying orientation of the supporting surface of the platen, and which is configured to pinch the sheet and to convey the sheet; and a moving mechanism configured to move the platen to a printing position and to a release position.

An image recording apparatus includes a belt passed around a drive pulley and a driven pulley, a support member configured to support a recording head and fixed to the belt, a holder member, having a claw part, configured to hold the driven pulley, and a frame having a first opening for the claw part to penetrate. The holder member is attached to the frame such as to be movable relative to the drive pulley. The first opening has an enlarged opening portion allowing the claw part to pass through without engaging with the frame on one side closer to the drive pulley. At least a portion of the claw part is positioned within a part of the first opening excluding the enlarged opening portion in a state where the holder member is positioned in a predetermined location closer to the drive pulley.