Medium conveying apparatus for controlling current limit value of dc motor
AssigneePfu Limited
InventorYuta Arai
Life of this patent
Estimating the term…
Abstract
A medium conveying apparatus includes a conveyance roller to convey a medium, an imaging device to image the medium, a DC motor to drive the conveyance roller, a processor to detect that a front end of the medium reaches between the conveyance roller and the imaging device, set a current limit value of the DC motor to a first limit value until the front end of the medium reaches between the conveyance roller and the imaging device, and change the current limit value to a second limit value larger than the first limit value after the front end of the medium has reached between the conveyance roller and the imaging device, and drive the conveyance roller by rotating the DC motor based on the second limit value when the imaging device performs imaging.
Claims20
A medium conveying apparatus comprising:
- a conveyance roller to convey a medium;
- an imaging device to image the medium;
- a DC motor to drive the conveyance roller;
- a processor to
- detect that a front end of the medium reaches between the conveyance roller and the imaging device,
- set a current limit value of the DC motor to a first limit value until the front end of the medium reaches between the conveyance roller and the imaging device, and change the current limit value to a second limit value larger than the first limit value after the front end of the medium has reached between the conveyance roller and the imaging device, and
- drive the conveyance roller by rotating the DC motor based on the second limit value when the imaging device performs imaging.
A method for controlling conveying a medium, comprising:
- conveying a medium by a conveyance roller;
- imaging the medium by an imaging device;
- driving the conveyance roller by a DC motor;
- detecting that a front end of the medium reaches between the conveyance roller and the imaging device;
- setting a current limit value of the DC motor to a first limit value until the front end of the medium reaches between the conveyance roller and the imaging device, and changing the current limit value to a second limit value larger than the first limit value after the front end of the medium has reached between the conveyance roller and the imaging device;
- and
- driving the conveyance roller by rotating the DC motor based on the second limit value when the imaging device performs imaging.
A computer-readable, non-transitory medium storing a computer program, wherein the computer program causes a medium conveying apparatus including a conveyance roller to convey a medium, an imaging device to image the medium, and a DC motor to drive the conveyance roller, to execute a process, the process comprising:
- detecting that a front end of the medium reaches between the conveyance roller and the imaging device;
- setting a current limit value of the DC motor to a first limit value until the front end of the medium reaches between the conveyance roller and the imaging device, and changing the current limit value to a second limit value larger than the first limit value after the front end of the medium has reached between the conveyance roller and the imaging device;
- and
- driving the conveyance roller by rotating the DC motor based on the second limit value when the imaging device performs imaging.
Dependencies are inferred from the claim text.