Seiko Epson Corporation

Toru Hayashi

Ryo Hamano

Kenji Hatada

Hiroshi Yoshida

Tsuneyuki Sasaki

Takashi Akahane

Takayuki Ishii

Tetsuji Takeishi

Jun Ushiama

Yoshitsugu Tokai

Takeshi Shiode

Ryoichi Onishi

Yuya Saito

A control device of a transport device includes a control unit configured to control a roll motor for rotating a first rotary shaft on which a medium is held and a transport motor for rotating a first driving roller, a tension detection unit configured to derive, for each tension detection cycle, a detected tension value of a tension applied to a tension adjustment portion of the medium, and a tension F/B unit configured to calculate a tension F/B correction amount by feedback control based on a deviation between a target tension and the detected tension value. The control unit is configured to calculate a driving force by the roll motor based on the tension F/B correction amount, and control the roll motor based on the driving force.

Transport device, recording device, and medium transport method

A medium feeding apparatus includes a feeding roller which feeds a medium unwound from a roll body around which the medium is wound, a roll motor which applies torque for rotating the roll body to the roll body, and a roll control portion which controls the roll motor at the time of a feeding operation based on effective tension calculated by acquiring a feeding amount of the medium fed at each of a plurality of acquiring timings included in a pre-feeding operation, which is a feeding operation performed in advance, acquiring tension applied to the medium between the roll body and the feeding roller between a plurality of the acquiring timings, and weighting a plurality of the acquired tensions with the corresponding feeding amount.

Medium feeding apparatus

A medium feeding apparatus includes a feeding portion that performs a feeding operation, which feeds a medium to a downstream side, and a reverse feeding operation, which feeds the medium to an upstream side, and a wind-up portion that performs a wind-up operation, which winds up a medium fed to the downstream side by the feeding operation, and a unwinding operation that unwinds the wound up medium, in which the wind-up portion performs the unwinding operation prior to the reverse feeding operation.

A transport apparatus includes a driving roller that transports a medium in a transport direction, a driven roller that presses the medium against the driving roller when the medium is transported, a changer that changes a pressing force by which the driven roller presses the medium against the driving roller, and a feeder configured to feed the medium toward the driving roller and pull back the medium in a direction opposite to the transport direction. Before the driving roller transports the medium, the feeder pulls back the medium after the changer has changed the pressing force to a value that is smaller than the value of the pressing force set for transport of the medium.

Transport apparatus and printer apparatus

A medium wind-up apparatus includes a reel-out motor, which is a driving source that winds up a medium, a control portion that controls the reel-out motor on the basis of a torque limit value, which regulates an upper limit of an output torque of the reel-out motor, and a reel-out side detection portion that detects a rotation speed of the reel-out motor, in which the control portion changes the torque limit value on the basis of the detected rotation speed. In this case, it is preferable that the control portion increase the torque limit value in a case in which the detected rotation speed falls below a first threshold value, and that the control portion reduce the torque limit value in a case in which the detected rotation speed exceeds a second threshold value, which is larger than the first threshold value.

Medium wind-up apparatus

A medium feeding apparatus includes a roll holding portion which holds a roll body around which a printing medium is wound, a feeding roller which pulls out the printing medium from the roll body and feeds the printing medium, a roll motor which rotates the roll body held by the roll holding portion, a roll motor control portion which controls the roll motor, and rotation position detecting portions which detect a rotation position of the roll body, the roll motor control portion performs removing looseness of the printing medium pulled out from the roll body by driving the roll motor and rotating the roll body in a rewinding direction, and in the removing, driving of the roll motor is finished on the basis of movement of the rotation position detected by the rotation position detecting portions.

Medium feeding apparatus, printing apparatus, and control method of medium feeding apparatus

A medium feeding apparatus includes a detection tension acquiring unit that acquires a detection tension which is a tension applied during an (n&#x2212;1)-th feeding operation in a plurality of feeding operations in which the medium is fed, a corrected tension calculating unit that calculates a corrected tension obtained by correcting a target tension which is a target value of a tension to be applied during a n-th feeding operation based on the detection tension, and a driving controlling unit that controls a roll motor during the n-th feeding operation based on the corrected tension.

Medium feeding control method and medium feeding apparatus

A printing apparatus includes a transport unit which includes a transport roller pair which transports a medium in a transport direction, a printing unit which prints onto the medium, a winding unit which winds the printed medium, and a tension application unit which applies a tension to the medium at a position between the transport roller pair and the winding unit. The tension application unit includes a pair of arms which are capable of rotating. A tension bar is supported on one end of the arms and comes into contact with the medium. The bar is rotated from an upper limit position to a lower limit position by transportation of the transport unit being performed two or more times.

Printing apparatus

A liquid ejecting apparatus includes an ejecting unit which can reciprocate with respect to a continuous paper, and ejects ink onto the continuous paper; a heating unit which heats a liquid ejecting region which is a region in which the ejecting unit can eject the ink to the continuous paper; an IR sensor which detects a temperature of the liquid ejecting region based on infrared light in the liquid ejecting region; and a control device which controls the heating unit based on a first detection temperature of the IR sensor. The control device controls the heating unit without using the first detection temperature which is detected by the IR sensor, when the ejecting unit is located in a temperature detecting region of the IR sensor.

Liquid ejecting apparatus

A recording apparatus includes a recording section that performs recording on a recording medium, a rotation section that sends out the recording medium by rotating a roll of the recording medium or rolls up the recording medium into a roll, and a roll diameter estimation section that estimates the roll diameter of the recording medium present in the rotation section. The roll diameter estimation section is capable of estimating the roll diameter during the recording performed by the recording section. The thus-configured recording apparatus estimates the roll diameter of the recording medium in real time during recording.

Recording apparatus and recording method

A recording apparatus includes a transportation section of a recording medium; a winding section of the recording medium; and a control section that controls transportation of the recording medium by controlling the transportation section and the winding section. The control section switches a threshold of a torque limit of the winding section when winding the recording medium at the winding section by synchronizing with an operation of the transportation section. According to the recording apparatus having such a configuration, an occurrence of defects is suppressed when winding the recording medium.

Recording apparatus and winding method

A printer is configured which includes, a printing head; a first transport mechanism which transports a printing medium along a transport path; a second transport mechanism which transports the printing medium along the transport path between the printing head and the first transport mechanism; a forward transport control unit which executes a forward transport control transporting the printing medium to the printing head side using the second transport mechanism while applying a load to the printing medium using the roller, and printing a coloring agent to the printing medium using the printing head; and a reverse transport control unit which executes a reverse transport control transporting the printing medium to the first transport mechanism side using the second transport mechanism while applying a load which is smaller than that in the forward transport control to the printing medium using the roller.

Printer

A printer includes a head for performing printing, a roll element on which a print medium is wound, a first conveying mechanism for rotating the roll element, an auxiliary roller positioned between the head and the roll, a second conveying mechanism for driving the auxiliary roller, a nip roller constituting a pair with the auxiliary roller to hold the medium on both sides, a nip roller drive mechanism for driving the nip roller and creating a state in which the medium is held on both sides and a state in which the medium is not held on both sides, and a controller for setting the nip roller to a first state in which the roll element is rotated in a forward direction to convey the print medium, and a second state in which the roll element is rotated in a reverse direction to convey the print medium.

The invention relates to a printing apparatus that performs printing by scanning a carriage that has a print head in a main scan direction. The printing apparatus according to an aspect of the present invention includes: a carriage motor that drives the carriage; a control unit that controls the driving of the carriage motor; a memory unit that stores a plurality of patterns of velocity data regarding at least either one of scanning speeds of the carriage after start of the scanning and driving speeds of the carriage motor corresponding to the scanning speeds of the carriage; and a driving mode switchover unit that switches over the patterns of the velocity data, wherein the control unit controls the driving of the carriage motor in such a manner that the carriage is scanned on the basis of the velocity data selected by the driving mode switchover unit.

Printing apparatus with switchover section that switches over patterns of velocity data

A printer for performing a printing operation on a printing medium, includes an optical sensor, operable to detect the printing medium; an emission intensity adjuster, operable to adjust emission intensity of a light-emitting element included in the optical sensor; and an output monitor, operable to monitor an output voltage of the optical sensor so as to control the emission intensity adjuster to adjust the emission intensity.

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Suwa, Japan

Toru Hayashi