A printer includes a print head and a processor. The print head ejects ink from nozzles to a printing medium while moving in a first direction, and also moves in a second direction intersecting with the first direction by a moving amount that is a dimension in the second direction of each of blocks into which the nozzles are divided in the second direction. Based on a position of the printing medium and the dimension, the processor determines whether to perform printing in a first mode or a second mode. A printing start position in the second direction of the print head is set such that a position in the second direction of one of boundaries between mutually adjacent blocks coincides, in the first mode, with a position of a back end of a printing region, and in the second mode, with a position of a front end of the printing region.

An apparatus for controlling movement of a target object generates a first operation quantity for first feedback control, and determines a second operation quantity for second feedback control in accordance with which of plural regions obtained by dividing a two-dimensional space defined by two variables of the first and second state quantities includes the first and second state quantities. The plural regions include first, second and third regions, the first region being provided between the second and third regions. The second operation quantity is determined so that the second operation quantity when the first and second state quantities are located in the first region is less than the second operation quantity when the first and second state quantities are located in the second region or the third region.

An electronic device includes a moving body, first and second sensors, and a processor. The first sensor detects the moving body passing a reference position while moving along a first axis. The second sensor outputs a second phase signal of a second phase according to the moving body moving along the first axis, wherein the second phase is shifted from a first phase. In a setting mode, the processor stores information data indicating a level of the second phase signal at a time when the first sensor detects the reference position. In an operation control mode, the processor sets, as a position pertaining to an origin on the first axis, a position of an earliest edge of the first phase after the second phase signal switches from a level identical with the level stored in the setting mode to a different level after the first sensor detects the reference position.

Provided are a position detection device, a printing apparatus equipped with the position detection device and a position detection method which make it possible to set an original point on a deviation-free appropriate position with no need of highly accurate adjustment of built-in positions of a linear encoder and an original point sensor.

In a case where a point that low-to-high switching of an output from a scale sensor is detected is set as a light transmission timing, a point that high-to-low switching of the output is detected is set as a light shielding timing and an output change point that an original point sensor detects is set as a detection timing, in a duration time D1 which lasts from the detection timing to a first light transmission timing which is the closest to the detection timing and a duration time D2 which lasts from the detection timing to a first light shielding timing which is the closest to the detection timing, when the duration time D1>the duration time D2, a position of a moving body which is obtained at a second light transmission timing is set as an original point and when the duration time D1<the duration time D2, the position of the moving body which is obtained at a second light shielding timing (the first light shielding timing) is set as the original point.

A carriage is configured to move by receiving driving force from a carriage motor. A recording head is mounted on the carriage. A controller is configured to: control a power supply to supply a first driving current to a drive target, the first driving current being variable; when a second driving current for driving the carriage motor does not exceed a limiting current, control the power supply to supply the second driving current to the carriage motor, the second driving current being variable, the limiting current being obtained by subtracting the first driving current from an allowable current of the power supply; and when the second driving current exceeds the limiting current, control the power supply to supply a limited second driving current to the carriage motor, the limited second driving current being obtained by cutting a part of the second driving current, the part exceeding the limiting current.

A recording device includes a medium support portion, a recording head configured to eject a liquid toward a medium supported by the medium support portion, a gantry that includes the recording head and is configured to move relative to the medium support portion in a Y-axis direction, a first linear scale attached to a first attachment member, a first encoder configured to read markings of the first linear scale while moving, together with the gantry, relative to the medium support portion in the Y-axis direction to detect a displacement of the gantry, and a length adjustment unit configured to adjust a length of the first linear scale attached to the first attachment member, by adjusting a tension in the Y-axis direction applied to the first linear scale.

A sliding mechanism is provided and includes a linear encoder for detecting a movement distance of a slider in relation to a support member. The sliding mechanism includes a slider that can move in relation to a support member, a slider that can move in relation to the support member as well as the slider, a linear scale fixed to the slider and a sensor fixed to the slider; and a linear encoder for detecting a movement distance of the slider in relation to the support member. In the sliding mechanism, the slider is transferred in relation to the support member and the slider, and subsequently the slider is transferred in relation to the support member and the slider, while the slider is kept in a state of being stopped.

There is provided a liquid discharge apparatus including: a liquid discharge head having a nozzle surface; a carriage; a carriage mover; a conveyor conveying a medium in a conveyance direction; a velocity sensor; a distance sensor; and a controller. The controller makes a determination regarding the velocity of the carriage based on output of the velocity sensor, and makes a determination regarding the distance between the medium and the nozzle surface based on output of the distance sensor. In a case that that the controller determines that the velocity is less than a predetermined velocity and that the distance is less than a predetermined distance, the controller interrupts recording performed by the liquid discharge head.

An inkjet printing apparatus includes a mounting unit where a recording medium is mountable, a head unit that ejects ink droplets to the recording medium, a planar direction driving unit that drives at least one of the head unit ejecting the ink droplets and the mounting unit to move in a planar direction and that changes a relative positions of the head unit and the mounting unit in the planar direction, and a height direction driving unit that changes a relative positions of the head unit and the mounting unit in a height direction perpendicular to the planar direction. The planar direction driving unit has a moving speed changing mechanism that changes a carriage speed between the head unit and the mounting unit in the planar direction. The height direction driving unit has a distance changing mechanism that changes a distance between the head unit and the mounting unit.

A nail printing device includes a printing head, a memory and a processor. The printing head performs printing with respect to a nail surface. Based on a program stored in the memory, the processor determines whether a printing operation of the printing head satisfies a preset condition. If the processor determines that the printing operation of the printing head satisfies the preset condition, the processor continuously performs the printing operation. If the processor determines that the printing operation of the printing head does not satisfy the preset condition, the processor performs error handling processing which is different from the printing operation.