A three-dimensional object printer includes a head having a plurality of nozzles that discharge a liquid, a movement mechanism having an arm section that supports the head and having a plurality of joint sections provided on the arm section, a drive circuit that generates a drive signal to drive the head, a control circuit that generates a control signal to control supply of the drive signal to the head, a first cable for transmitting the drive signal from the drive circuit to the head, and a second cable for transmitting the control signal from the control circuit to the head. At least a part of the second cable is arranged along the arm section. The control signal is transmitted as a differential signal to the second cable.

A three-dimensional object printer includes a head having a plurality of nozzles that discharge a liquid, a movement mechanism having an arm section that supports the head and having a plurality of joint sections provided on the arm section, a drive circuit that generates a drive signal to drive the head, a control circuit that generates a control signal to control supply of the drive signal to the head, a first cable for transmitting the drive signal from the drive circuit to the head, and a second cable for transmitting the control signal from the control circuit to the head. At least a part of the second cable is arranged along the arm section. The control signal is transmitted as a differential signal to the second cable.

An inkjet recording apparatus includes a recording unit, a head unit, a frame, and an angle adjustment mechanism. The angle adjustment mechanism includes an angle adjustment member, a biasing member, and an operation member. The angle adjustment member is in contact with the head unit and is rotatable about an adjustment rotation shaft extending parallel to the unit rotation shaft of the head unit. The biasing member biases the angle adjustment member in a direction of rotating the angle adjustment member in a first direction. The operation member contacts the angle adjustment member and rotates the angle adjustment member in a second direction opposite to the first direction against a biasing force of the biasing member. The angle adjustment member is configured by of a plurality of shaft members.

An inkjet recording apparatus includes a recording unit, a head unit, a frame, and an angle adjustment mechanism. The angle adjustment mechanism includes an angle adjustment member, a biasing member, and an operation member. The angle adjustment member is in contact with the head unit and is rotatable about an adjustment rotation shaft extending parallel to the unit rotation shaft of the head unit. The biasing member biases the angle adjustment member in a direction of rotating the angle adjustment member in a first direction. The operation member contacts the angle adjustment member and rotates the angle adjustment member in a second direction opposite to the first direction against a biasing force of the biasing member. The angle adjustment member is configured by of a plurality of shaft members.

A head unit to be detachably arrayed in a predetermined array direction on a base member includes: an ink discharge head having a nozzle surface configured to discharge an ink; a head holder attachable to and detachable from the base member while holding the ink discharge head in a holding region; and a posture adjustment mechanism configured to adjust a posture of the nozzle surface with respect to the head holder by rotating the ink discharge head with respect to the head holder about an axis of rotation perpendicular to both a surface normal to the nozzle surface and the array direction in a state where the head holder is not attached to the base member.

A head unit to be detachably arrayed in a predetermined array direction on a base member includes: an ink discharge head having a nozzle surface configured to discharge an ink; a head holder attachable to and detachable from the base member while holding the ink discharge head in a holding region; and a posture adjustment mechanism configured to adjust a posture of the nozzle surface with respect to the head holder by rotating the ink discharge head with respect to the head holder about an axis of rotation perpendicular to both a surface normal to the nozzle surface and the array direction in a state where the head holder is not attached to the base member.

A recording-head position adjustment mechanism adjusts a position of a recording head. The recording-head position adjustment mechanism includes a first support, a second support, and an adjuster. The first support supports a first end of the recording head in a longitudinal direction of the recording head. The second support supports a second end of the recording head in the longitudinal direction. The adjuster moves the second support with respect to the first support in a transverse direction intersecting the longitudinal direction to adjust an inclination of the recording head.

A recording-head position adjustment mechanism adjusts a position of a recording head. The recording-head position adjustment mechanism includes a first support, a second support, and an adjuster. The first support supports a first end of the recording head in a longitudinal direction of the recording head. The second support supports a second end of the recording head in the longitudinal direction. The adjuster moves the second support with respect to the first support in a transverse direction intersecting the longitudinal direction to adjust an inclination of the recording head.

An inkjet printhead assembly includes a controller operatively connected to an actuator so the controller can operate the actuator to tilt a carrier plate in which a plurality of printheads are mounted after a purge of the printheads has been performed. The tilt assists gravity in directing the purged ink to a wiper that is moved by another actuator operated by the controller to wipe the faceplates of one or more printhead faceplates in the carrier plate. After the wiper is returned to its home position, the carrier plate is returned to its level position and the printhead assembly is returned to its operational position for printing.

An inkjet printhead assembly includes a controller operatively connected to an actuator so the controller can operate the actuator to tilt a carrier plate in which a plurality of printheads are mounted after a purge of the printheads has been performed. The tilt assists gravity in directing the purged ink to a wiper that is moved by another actuator operated by the controller to wipe the faceplates of one or more printhead faceplates in the carrier plate. After the wiper is returned to its home position, the carrier plate is returned to its level position and the printhead assembly is returned to its operational position for printing.