Abstract: A conveying device includes: a medium conveying unit configured to convey a medium; a first drive unit configured to drive the medium conveying unit; a medium supply unit configured to supply the medium toward the medium conveying unit; a second drive unit configured to drive the medium supply unit; a tension bar disposed in a conveyance path between the medium conveying unit and the medium supply unit and configured to swing in a first direction and a second direction and apply tension to the conveyed medium; a third drive unit configured to swing the tension bar; a measurement unit configured to measure an output of the third drive unit when moving the tension bar; and a control unit, in which the measurement unit measures a first output of the third drive unit when moving the tension bar in the first direction and a second output of the third drive unit when moving the tension bar in the second direction, and the control unit controls the third drive unit, based on a measurement result from the measurement

Abstract: A method for controlling a printing apparatus, the method including rotating a feeding shaft that supports a roll body so as to wind up a medium based on a winding direction data, and determining that a winding direction in the winding direction data matches a winding direction of the roll body supported by the feeding shaft when a tension bar that applies tension to the medium between a printing section that performs printing on the medium and the feeding shaft moves upward by the feeding shaft rotating, and determining that the winding direction in the winding direction data does not match the winding direction of the roll body supported by the feeding shaft when the tension bar moves downward by the feeding shaft rotating.

Abstract: A printing apparatus includes: a feeding shaft configured to support a roll body; a printing section configured to perform printing on a medium fed from the feeding shaft; a tension applying unit configured to come into contact with the medium after the medium is fed out from the feeding shaft and before the medium reaches the printing section, thereby applying tension to the medium; and a control unit, in which the tension applying unit includes: a tension bar configured to come into contact with the medium; an arm configured to support the tension bar and rotate to displace the tension bar; an encoder configured to detect a rotational angle of the arm; and a stopper configured to come into contact with the tension bar or the arm to restrict movement of the tension bar and the arm, and the control unit sets, as a reference angle of the arm, a rotational angle of the arm detected by the encoder in a state in which the tension bar or the arm is in contact with the stopper.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.