Seiko Epson Corporation

Ryo Hamano

Toru Hayashi

Daisuke Hiruma

Yasushi Yajima

Norihito Harada

Kenji Hatada

Hiroshi Yoshida

Hiroyuki Hagiwara

Naohiro Ueyama

Hiroyuki Ishii

Jun Ushiama

Naoto Hayakawa

Daisuke Fujiwara

Takeshi Shiode

Kenichi Kitamura

Yuya Saito

Provided are: a holding unit configured to rotatably hold a roll body on which a medium is wound; a transport unit configured to transport the medium unwound from the roll body; a tension applying unit configured to press the medium between the holding unit and the transport unit to apply tension to the medium; a driving portion configured to provide driving force to the tension applying unit; a control unit configured to control the transport unit and the driving portion; and a detector configured to detect a load applied to the transport unit, and the control unit controls the driving force by the driving portion on the basis of the load detected by the detector to adjust the tension applied to the medium.

Transport device, printing apparatus, and transport controlling method

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 recording device includes: a transport unit configured to transport a medium in a plurality of transport speed modes; a driving unit configured to drive the transport unit with a plurality of speed profiles, each corresponding to one of the plurality of transport speed modes; a current sensor configured to measure a reference current the driving unit, the reference current being a current flowing in the driving unit when the medium is transported in a loosened state; and a control configured to acquire a plurality of current profiles, each corresponding to one of the speed profiles, based on the reference current. The control unit is configured to acquire a first current profile based on the reference current when the medium is transported in a first transport speed mode, and to generate a second current profile based on the first current profile.

Recording device and control method for recording device

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.

Medium feeding 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 recording device includes a feeding roller which feeds a medium; and a groove which is provided on a downstream side of the feeding roller in a feeding path of the medium and is used for cutting the medium. The feeding roller feeds the medium to an upstream side before feeding the medium to the downstream side, after the medium is cut at a position of the groove. It is preferable that the recording device further include a control portion which controls the feeding roller so that the feeding roller feeds the medium to the upstream side before feeding the medium to the downstream side, in a case where whether or not there is a possibility that the medium is cut at the position of the groove is determined and thus it is determined that there is a possibility that the medium is cut at the position of the groove.

Recording device and medium feeding method for recording device

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 printer includes a transportation unit that transports roll paper, a winding unit that winds up the transported roll paper, and a controller that controls the transportation unit and the winding unit. The controller switches between thresholds for a torque limit of the winding unit on the basis of inertia of the winding unit and a speed at which the roll paper is transported when the winding unit winds up the roll paper in synchronization with a transportation operation of the transportation unit.

Recording apparatus and winding method

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.

A printing apparatus includes a roll-out motor that rotates a roll body supported by a roll body support unit, a feed roller pair that transports a paper drawn from the roll body, and a load measuring unit that measures a rotation load of the roll body when the roll body is rotated at a low speed and a rotation load of the roll body when the roll body is rotated at a high speed. A rotation angle range in which the roll body is rotated at the high speed is greater than a rotation angle range in which the roll body is rotated at the low speed. In one rotation of the roll body, at least a part of the rotation angle range of the roll body rotated at the low speed overlaps with the rotation angle range of the roll body rotated at the high speed.

Printing apparatus

A recording apparatus includes: a first driving unit that rotates a roll member; a second driving unit that drives a transport unit that transports a medium of the roll member; and a control unit that executes a first process for measuring a load occurring when transporting the medium while rotating the roll member 1/N rotations in a transport direction of the medium by driving the first driving unit while the second driving unit is stopped, and after executing the first process, executes a second process for rotating the roll member 1/N rotations in a opposite direction as the transport direction by driving the first driving unit while the second driving unit is stopped and then rotating the roll member 1/N rotations in the transport direction by driving the first driving unit and the second driving unit.

Recording apparatus

A grounding structure achieves a conductive state between members by making contact with the members. One member includes a screw-shaped portion in at least part of the member, and the other member includes an anchoring portion that engages with the screw-shaped portion of the one member under a biasing force in an interlocked state.

Grounding structure and recording apparatus

A liquid ejecting apparatus includes a liquid ejecting head unit including a plurality of liquid ejecting heads in a parallel arrangement. Each liquid ejecting head ejects a liquid from nozzles formed in a nozzle face toward an ejection target object in accordance with a drive signal from a controller. Each liquid ejecting head has an individual two-dimensional code that includes at least a portion of information related to the liquid ejecting head. The liquid ejecting head unit includes a collective two-dimensional code that includes arrangement information of the liquid ejecting heads in the liquid ejecting head unit and collective information related to the information included in the individual two-dimensional codes.

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Matsumoto, Japan

Ryo Hamano