Medium conveying apparatus for determining thickness of medium
AssigneePfu Limited
InventorsYuta Arai, Shingo Kanaya
Life of this patent
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Abstract
A medium conveying apparatus includes a conveyance roller to convey a medium, a motor to drive the conveyance roller, a signal generator to output a pulse signal, a pulse width of which changes according to a rotation speed of the motor, and a processor to rotate the conveyance roller by controlling the motor, and detect a fluctuation of the pulse width caused by a load fluctuation when the conveyance roller conveys a medium to determine a thickness of the medium according to the pulse width.
Claims20
A medium conveying apparatus comprising:
- a conveyance roller to convey a medium;
- a motor to drive the conveyance roller;
- a signal generator to output a pulse signal, a pulse width of which changes according to a rotation speed of the motor;
- and
- a processor to
- rotate the conveyance roller by controlling the motor;
- detect a fluctuation of the pulse width caused by a load fluctuation when the conveyance roller conveys the medium;
- and
- determine a thickness of the medium according to the pulse width.
A method for determining a thickness of a medium, comprising:
- rotating a conveyance roller to convey a medium by controlling a motor to drive the conveyance roller;
- outputting a pulse signal, a pulse width of which changes according to a rotation speed of the motor;
- detecting a fluctuation of the pulse width caused by a load fluctuation when the conveyance roller conveys the medium;
- and
- determining a thickness of the medium according to the pulse width.
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, a motor to drive the conveyance roller, a signal generator to output a pulse signal, a pulse width of which changes according to a rotation speed of the motor, to execute a process, the process comprising:
- rotating the conveyance roller by controlling the motor;
- detecting a fluctuation of the pulse width caused by a load fluctuation when the conveyance roller conveys the medium;
- and
- determining a thickness of the medium according to the pulse width.
Dependencies are inferred from the claim text.