Abstract: An apparatus includes a driven member, a DC brushless motor, a first signal generation unit configured to output a first signal according to rotation of the DC brushless motor and to change an output value of the first signal each time the DC brushless motor rotates by a predetermined amount, a movement unit configured to move the driven member by a driving force of the DC brushless motor, a second signal generation unit configured to output a second signal each time the driven member moves by the predetermined amount, and a control unit configured to control driving of the DC brushless motor based on the output value of the first signal and a value of a number of times that the second signal is output during a period in which the DC brushless motor rotates by a predetermined amount.

Abstract: A recording apparatus includes: a recording unit for applying ink on a sheet by a printing head; a drying unit for drying the sheet; a measuring unit for measuring patterns on the sheet; a conveying unit for conveying the sheet; a recovering unit for performing a printing head-recovering operation; and a control unit for controlling the apparatus such that, the recording apparatus performs recording to form patterns, the conveying unit performs first conveying to convey the sheet from a recording region to a drying region, the drying unit performs drying, the conveying unit performs second conveying to convey the sheet from the drying region to a measuring region, and the measuring unit performs measuring, in sequence, wherein the recovering operation is performed at timing at least partially overlapping at least one of the first and second conveying operations, the drying operation, and the color measuring operation, after the recording operation.

Abstract: A conveyance apparatus includes: a supply unit rotatably supporting a roll member around which a sheet is wound in form of a roll and configured to supply the sheet from the roll member; a motor for rotating the roll member; a roller pair configured to convey the sheet supplied from the supply unit while pinching the sheet; and a control unit configured to set the torque of the motor according to sheet information related to the sheet when taking up the sheet on the roll member by driving the motor while the sheet is pinched by the roller pair being stopped.

Abstract: There are provided a roll sheet conveying apparatus and a sheet conveying control method wherein it is possible to control motor driving for conveying a roll sheet at appropriate timing to keep constant the tension of the sheet to be conveyed without performing a special identifying operation. For this feature, a relationship between friction load torque on the roll sheet and the mass of the roll sheet is previously stored in a storing unit, whereby the moment of inertia of the roll sheet can be detected at appropriate timing during printing. As a result, the optimum tension of the sheet to be conveyed can be maintained by appropriately adjusting the driving control of a sheet feeding motor and a conveying motor without performing a special identifying operation.

Abstract: A conveyance apparatus includes a feeding unit, on which a roll sheet is settable, configured to feed the roll sheet, a conveyance roller configured to convey a sheet fed from the feeding unit, a first detection unit configured to detect a conveyance distance of the sheet conveyed by the conveyance roller, a second detection unit configured to detect a conveyance distance of the sheet drawn out from the roll sheet set on the feeding unit, a driving unit configured to synchronously drive the feeding unit when the sheet is conveyed by the conveyance roller, and a determination unit configured to determine a state of an end portion of the roll sheet based on detection results by the first detection unit and the second detection unit.

Abstract: A recording apparatus includes: a recording unit for applying ink on a sheet by a printing head; a drying unit for drying the sheet; a measuring unit for measuring patterns on the sheet; a conveying unit for conveying the sheet; a recovering unit for performing a printing head-recovering operation; and a control unit for controlling the apparatus such that, the recording apparatus performs recording to form patterns, the conveying unit performs first conveying to convey the sheet from a recording region to a drying region, the drying unit performs drying, the conveying unit performs second conveying to convey the sheet from the drying region to a measuring region, and the measuring unit performs measuring, in sequence, wherein the recovering operation is performed at timing at least partially overlapping at least one of the first and second conveying operations, the drying operation, and the color measuring operation, after the recording operation.

Abstract: A color measuring method includes: recording color patterns on a sheet by an inkjet head; measuring colors of the color patterns formed on the sheet; and recovering the inkjet head, wherein the recovering is prohibited within a period after the recording and before the measuring.

Abstract: A conveyance apparatus includes: a supply unit rotatably supporting a roll member around which a sheet is wound in form of a roll and configured to supply the sheet from the roll member; a motor for rotating the roll member; a roller pair configured to convey the sheet supplied from the supply unit while pinching the sheet; and a control unit configured to set the torque of the motor according to sheet information related to the sheet when taking up the sheet on the roll member by driving the motor while the sheet is pinched by the roller pair being stopped.

Abstract: This invention has been made to cause a printing apparatus for conveying roll paper and performing printing to simultaneously attain a stable conveyance accuracy and prevent skewed conveyance independently of LF roller driving conditions and disturbance conditions that variously change as the roll paper state changes. For this purpose, a feed motor is used as a load generator for the roll paper. A section from a conveyance operation by the LF roller to the next conveyance operation is divided into a plurality of sub-sections. A feed mechanism is controlled by switching between a feeder load generation section and a feeder load zero section for each sub-section.

Abstract: A conveying device performs an appropriate initialization sequence at start of an operation thereof in response to a manipulation of a lever of a non-operational conveying mechanism thereof. The conveying device includes a pair of rollers configured to convey a sheet, a separating unit configured to separate one of the pair of rollers from another of the pair of rollers, a holding unit configured to retain a status representing whether a separation process is performed by the separating unit, a memory unit configured to store information representing a state of the conveying device at power-off, and a control unit configured to control the conveying device based on the status retained by the holding unit and the information stored by the memory unit.

Abstract: An apparatus includes a driven member, a DC brushless motor, a first signal generation unit configured to output a first signal according to rotation of the DC brushless motor and to change an output value of the first signal each time the DC brushless motor rotates by a predetermined amount, a movement unit configured to move the driven member by a driving force of the DC brushless motor, a second signal generation unit configured to output a second signal each time the driven member moves by the predetermined amount, and a control unit configured to control driving of the DC brushless motor based on the output value of the first signal and a value of a number of times that the second signal is output during a period in which the DC brushless motor rotates by a predetermined amount.

Abstract: A rolled medium holding device includes a first gear mechanism 61 that is connected to a roll shaft holding the rolled medium and sends-out/rewinds the rolled medium, a second gear mechanism 62 that is connected to a torque limiter 64 and includes a plurality of torque transmission means, and a gear switching mechanism 63 that shifts connection between the plurality of torque transmission means and the first gear mechanism by operating the second gear mechanism for applying different back tension to the roll shaft. Accordingly, torque transferred from the torque limiter can be shifted, and whereby back tension in correspondence with a used rolled medium can be easily applied in a simple manner.

Abstract: A rolled medium supporting mechanism includes a supporting member 210 that rotatably supports a rolled medium. The mechanism is provided with a plurality of abutting supporting members 230 arranged in the circumferential direction of the supporting member and supporting the rolled medium by making abutting contact with an inner peripheral face of a hollow shaft portion of the rolled medium when the mechanism is inserted into the hollow shaft portion of the rolled medium. The abutting supporting members are configured to be freely displaced in a roll-diameter direction in accordance with an inner diameter of the hollow shaft portion. With such a configuration, it is not necessary to have a separate component in order to adapt to core members having different diameters, but only displacement of the abutting supporting member is needed. Thus, it is possible to simplify the construction and provide easy handling properties.

Abstract: A roll medium supporting apparatus includes: a base body portion to be inserted into a hollow shaft portion of a rolled medium; a plurality of contact supporting portions provided circumferentially of the base body portion so as to be capable of being displaced radially of the hollow shaft portion, having a plurality of predetermined positions within the displaceable range, and coming into contact with the inner peripheral surface of the hollow shaft portion and supporting the same; and a stabilizing mechanism configured to stabilize the contact supporting portions at the plurality of predetermined positions.

Abstract: A conveying device performs an appropriate initialization sequence at start of an operation thereof in response to a manipulation of a lever of a non-operational conveying mechanism thereof. The conveying device includes a pair of rollers configured to convey a sheet, a separating unit configured to separate one of the pair of rollers from another of the pair of rollers, a holding unit configured to retain a status representing whether a separation process is performed by the separating unit, a memory unit configured to store information representing a state of the conveying device at power-off, and a control unit configured to control the conveying device based on the status retained by the holding unit and the information stored by the memory unit.

Abstract: A roll medium supporting apparatus includes: a base body portion to be inserted into a hollow shaft portion of a rolled medium; a plurality of contact supporting portions provided circumferentially of the base body portion so as to be capable of being displaced radially of the hollow shaft portion, having a plurality of predetermined positions within the displaceable range, and coming into contact with the inner peripheral surface of the hollow shaft portion and supporting the same; and a stabilizing mechanism configured to stabilize the contact supporting portions at the plurality of predetermined positions.

Abstract: A liquid ejection head is operable to eject a liquid droplet toward a medium at a liquid ejection point A first roller transports the medium toward the liquid ejection point. A second roller ejects the medium transported from the liquid ejection point to the outside of the apparatus. At least one detection roller is directly brought into contact with the medium and is rotated in accordance with the transportation of the medium, the at least one detection roller being disposed in the vicinity of at least one of the first roller and the second roller. A detector detects a rotation amount of the detection roller. A controller controls the transportation of the medium in accordance with the rotation amount.

Abstract: A roll-like medium supporting device includes flange members 117 that are fitted to both ends of the roll-like medium; a first holder member 113 that is fixed to a main body of the device so as to support one of the flange members; and a second holder member 114 that is disposed in the main body of the device to be movable in the axial direction of the roll-like medium so as to support the other flange member. With such a configuration, it is possible to eliminate necessity of a conventional lengthy roll shaft and thus to set the roll paper in a simple manner.

Abstract: A roll-like medium supporting mechanism includes a supporting member 210 that rotatably supports a roll-like medium. The mechanism is provided with a plurality of abutting supporting members 230 arranged in the circumferential direction of the supporting member and supporting the roll-like medium by making abutting contact with an inner peripheral face of a hollow shaft portion of the roll-like medium when the mechanism is inserted into the hollow shaft portion of the roll-like medium. The abutting supporting members are configured to be freely displaced in a roll-diameter direction in accordance with an inner diameter of the hollow shaft portion. With such a configuration, it is not necessary to have a separate component in order to adapt to core members having different diameters, but only displacement of the abutting supporting member is needed. Thus, it is possible to simplify the construction and provide easy handling properties.

Abstract: A roll-shaped medium holding device includes a first gear mechanism 61 that is connected to a roll shaft holding the roll-shaped medium and sends-out/rewinds the roll-shaped medium, a second gear mechanism 62 that is connected to a torque limiter 64 and includes a plurality of torque transmission means, and a gear switching mechanism 63 that shifts connection between the plurality of torque transmission means and the first gear mechanism by operating the second gear mechanism for applying different back tension to the roll shaft. Accordingly, torque transferred from the torque limiter can be shifted, and whereby back tension in correspondence with a used roll-shaped medium can be easily applied in a simple manner.