Seiko Epson Corporation

Kenji Hatada

Hitoshi Igarashi

Ryo Hamano

Tetsuji Takeishi

Toru Hayashi

Masaki Kobayashi

Koji Niioka

Hiroshi Yoshida

Hideo Uruma

Hiroshi Igarashi

Shinichi Kamoshida

Seijun Horie

Naohiro Ueyama

Junya Kato

Jun Ushiama

Naoto Hayakawa

Takuya Fujita

A printing apparatus includes a conveyance unit, a printing unit, and a control unit. The conveyance unit includes a feeding unit, a conveyance roller pair, a feed driving unit, a first encoder, and a second encoder. The control unit is configured to execute a feed adjustment operation of adjusting tension of the medium fed from the feeding unit by controlling the feed driving unit such that the control unit executes the feed adjustment operation based on an output of the second encoder in a first period from a start of rotation of the conveyance roller pair until a specified time elapses and such that the control unit executes the feed adjustment operation based on an output of the first encoder in a second period after completion of the first period.

Printing apparatus and conveyance control method

There is provided a medium feeding apparatus including a feeding roller that feeds a printing medium, a roll holding portion that holds a roll body on which the printing medium is wound, an intermediate roller that pulls out the printing medium from the roll body and feeds the printing medium on the feeding roller, a rotation amount detection portion that detects an amount of rotation of the intermediate roller and an amount of rotation of the roll body when the printing medium is fed by the intermediate roller, and a controller that calculates a roll diameter of the roll body based on the detected amount of rotation of the intermediate roller and the detected amount of rotation of the roll body.

Medium feeding apparatus and control method for medium feeding apparatus

A roll-shaped medium transport device includes: a medium supply unit that keeps a roll body formed by winding a roll-shaped medium on a support shaft, and unwinds and supplies the roll-shaped medium; a transport unit that transports the roll-shaped medium unwound from the roll body; a rotation detecting unit that detects rotation of the support shaft; a rotation unit that rotates the support shaft; and a determination unit that determines abnormality of a transport state of the roll-shaped medium on the basis of the rotation detecting unit when the rotation unit rotates the support shaft, when the rotation detecting unit does not detect the rotation of the support shaft in a state where a transport operation of the roll-shaped medium is performed by the transport unit.

Roll-shaped medium transport device, roll-shaped medium transport method, and printing apparatus

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

Motor control devices and methods are described herein. In one embodiment, such a device includes a fluid ejection head configured to eject a fluid onto a sheet that is on a downstream side from a transport driving roller along a supply direction of the sheet. The device also includes a first motor that provides a driving force for rotating a roll on which the sheet is wound, and a second motor that provides a driving force for driving the transport driving roller. The transport driving roller is on a downstream side from the roll along the supply direction of the sheet. The device also includes a motor control unit that simultaneously drives the first and second motors, and the motor control unit is configured to control an interpolation output that is given to the first motor while subjected to a change in a driving speed of the second motor.

Motor control device, fluid ejection device, and motor control method

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 recording apparatus includes an ink discharge part, a first drive part that drives a rotation of a roll body in which the recording medium is wound, a second drive part that drives the conveyance part that conveys the recording medium, and a control part that controls operations of the first drive part and the second drive part. The control part drives the first drive part in a halted state of the second drive part and executes a measurement that measures a relationship between a load and a drive speed when conveying the recording medium and the control part executes the measurement for a single rotation of the roll body. The control part also provides a first measurement mode to execute the single rotation which is divided into plural number.

Recording apparatus and recording medium conveyance method

A printing device includes a first roller for rotatably retaining a roll body where a medium is rolled, a first motor for rotating the first roller, a second roller installed further to the downstream side of the roll body in the feeding direction of the medium to feed the medium in the feeding direction or in a reverse feeding direction which is opposite to the feeding direction corresponding to the rotating direction, a second motor for rotating the second roller, and a controller which causes the medium to become slack the first roller and the second roller by feeding the medium by a predetermined feeding amount in the reverse feeding direction by the second motor, and then rotates the roll body in a winding-up direction by the first motor so that the slackness decreases to calculate the diameter of the roll body based on the rotation amount of the first roller at that time and the predetermined feeding amount.

Printing device and roll diameter calculating method and program

Printing device, printing method, and program

To press a medium using an appropriate pressing force and perform colorimetric measurement, a color measurement device for performing colorimetric measurement of a print pattern printed on a medium, the color measurement device comprising a pressing member for pressing the medium; a power source for outputting power for the pressing member to press the medium; a detecting part for detecting a pressing force on the medium; a color measurement section for performing colorimetric measurement of the print pattern; and a control part for controlling the power source so that the pressing force detected by the detecting part is equal to a predetermined pressing force, and for causing the color measurement section to perform colorimetric measurement of the print pattern printed on the medium pressed by the pressing member.

Color measurement device and color measurement method

A motor control device includes: a first motor that provides a driving force for rotating a roll on which a roll paper is wound to supply the roll paper from the roll; a second motor that provides a driving force for driving a transport driving roller which is provided on a downstream side than the roll along a supply direction of the roll paper and used for transporting the roll paper; a load measuring unit that measures a relationship between a load on the first motor and a driving speed of the first motor when the second motor is not driven and the first motor is driven; and a motor control unit that simultaneously drives the first and second motors at a certain timing, provides to the first motor an interpolation output based on the measurement result of the load measurement unit and a driving speed of the second motor during the control, and transports the roll paper to the downstream side by driving the second motor.

There is provided a printing method using a first motor that applies a driving force for rotating a roll body around which a printing medium is wound, a second motor that applies a driving force for intermittently driving a transport driving roller that transports the printing medium, and a print head that intermittently ejects ink onto the printing medium alternately with the driving of the second motor. The printing method includes driving the first motor such that tension applied to the printing medium is constant during at least a part of a period in which the second motor is driven and stopping the driving of the first motor during at least a part of a period in which the driving of the second motor is stopped.

Printing method and printing apparatus

A recording apparatus performs recording on a strip of a recording target medium that is fed from a roll object that is set in or on the recording apparatus. The roll object is formed as, or at least includes, a roll of the recording target medium. The recording apparatus includes: a rotating unit that rotates the roll object; a rotation controlling unit that controls the rotation of the rotating unit; and a roll object diameter measuring unit that measures the diameter of the roll object, wherein the rotation controlling unit sets the rotation speed of the rotating unit or the rotation amount of the rotating unit on the basis of the diameter of the roll object measured by the roll object diameter measuring unit so as to ensure that at least either one of the transportation speed of the recording target medium and the transportation distance of the recording target medium is set at a predetermined value.

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Shiojiri, Japan

Kenji Hatada