Patent application number | Description | Published |
20090057997 | Printer, drive control method, and motor control program for printer - A printer includes a motor, a position calculation unit, a speed calculation unit, a position control unit, a speed control unit, and a switching unit. The motor generates a driving force by which a transported object is transported. The position calculation unit calculates a current position of the transported object through driving the motor. The speed calculation unit calculates a current speed of the transported object through driving the motor. The position control unit controls the motor using at least PI control on the basis of the current position calculated by the position calculation unit and a target position. The speed control unit controls the motor using at least PI control on the basis of the current speed calculated by the speed calculation unit and a target speed. The switching unit switches from control of the motor using the speed control unit to control of the motor using the position control unit at a position that is a predetermined distance before a target stop position to which the motor is driven. | 03-05-2009 |
20090060559 | Liquid ejecting apparatus - A liquid ejecting apparatus includes a record head having nozzles that discharge liquid; a transporting path along which a medium is transported; a transporting mechanism that transports the medium along the transporting path; a sensor including a light-emitting element and a light-receiving element and disposed at a first position on the transporting path, the first position being located upstream relative to the record head in a transporting direction of the medium, the sensor outputting a signal in accordance with presence or absence of the medium at the first position; and a control unit that controls supply of power to the sensor and detects the presence or absence of the medium through the sensor. The control unit stops the supply of power to the sensor when the control unit detects a downstream end of the medium in the transporting direction, and resumes the supply of power to the sensor when the control unit detects an upstream end of the medium in the transporting direction. | 03-05-2009 |
20090245912 | Motor control device, fluid ejection device, and motor control 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. | 10-01-2009 |
20090269119 | PRINTING APPARATUS AND PRINTING METHOD - A printing apparatus including: a first motor configured to provide a drive force for rotating a roll member that is a wound medium; a second motor configured to provide a drive force for driving a transporting drive roller provided on a downstream side of the roll member along a feeding direction of the medium for transporting the medium; and a control unit configured to drive at least one of the first motor and the second motor to cancel the slackness of the medium generated between the roll member and the transporting drive roller. | 10-29-2009 |
20090297244 | Recording apparatus and method for controlling the rotation of rotating section in recording 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. | 12-03-2009 |
20100053251 | PRINTING METHOD AND PRINTING APPARATUS - 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. | 03-04-2010 |
20110164084 | LIQUID EJECTING APPARATUS - A liquid ejecting apparatus includes a record head having nozzles that discharge liquid; a transporting path along which a medium is transported; a transporting mechanism that transports the medium along the transporting path; a sensor including a light-emitting element and a light-receiving element and disposed at a first position on the transporting path, the first position being located upstream relative to the record head in a transporting direction of the medium, the sensor outputting a signal in accordance with presence or absence of the medium at the first position; and a control unit that controls supply of power to the sensor and detects the presence or absence of the medium through the sensor. The control unit stops the supply of power to the sensor when the control unit detects a downstream end of the medium in the transporting direction, and resumes the supply of power to the sensor when the control unit detects an upstream end of the medium in the transporting direction. | 07-07-2011 |
20120012634 | PRINTING DEVICE AND ROLL DIAMETER CALCULATING METHOD AND PROGRAM - 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. | 01-19-2012 |
20120038699 | PRINTING DEVICE, PRINTING METHOD, AND PROGRAM - A printing device includes: | 02-16-2012 |
20130015285 | ROLL-SHAPED MEDIUM TRANSPORT DEVICE, ROLL-SHAPED MEDIUM TRANSPORT METHOD, AND PRINTING APPARATUSAANM URUMA; HideoAACI Okaya-shiAACO JPAAGP URUMA; Hideo Okaya-shi JPAANM KOBAYASHI; MasakiAACI Matsumoto-shiAACO JPAAGP KOBAYASHI; Masaki Matsumoto-shi JPAANM HATADA; KenjiAACI Shiojiri-shiAACO JPAAGP HATADA; Kenji Shiojiri-shi JP - 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. | 01-17-2013 |
20130235110 | MOTOR CONTROL DEVICE, FLUID EJECTION DEVICE, AND MOTOR CONTROL METHOD - 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. | 09-12-2013 |
20130342601 | RECORDING 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. | 12-26-2013 |
20140292884 | RECORDING 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. | 10-02-2014 |