Medium conveying apparatus, medium conveying method, and computer-readable non-transitory medium
AssigneePfu Limited
InventorShumpei Koshima
Life of this patent
Estimating the term…
Abstract
A medium conveying apparatus includes a roller to convey a medium, a direct current (DC) motor to drive the roller, and control circuitry to control the DC motor. The control circuitry switches control of the DC motor from open-loop control to closed-loop control when a predetermined time elapses after start of speed change of the DC motor or the roller, or speed of the DC motor or the roller reaches a predetermined speed after the start of speed change of the DC motor or the roller.
Claims8
A medium conveying apparatus comprising:
- a roller to convey a medium;
- a direct current (DC) motor to drive the roller;
- and
- control circuitry configured to:
- control the DC motor;
- and
- switch control of the DC motor from open-loop control to closed-loop control when a predetermined time elapses after start of speed change of the DC motor or the roller, or speed of the DC motor or the roller reaches a predetermined speed after the start of speed change of the DC motor or the roller.
A method for conveying a medium, the method comprising:
- conveying a medium by a conveyance roller;
- driving the roller by a DC motor;
- and
- controlling the DC motor,
- wherein the controlling includes switching control of the DC motor from open-loop control to closed-loop control when a predetermined time elapses, or speed of the DC motor or the roller reaches a predetermined speed after start of speed change of the DC motor or the roller.
A computer-readable, non-transitory medium storing a computer program, wherein the computer program causes a medium conveying apparatus including a roller to convey a medium and a DC motor to drive the roller, to execute a process, the process comprising
- controlling the DC motor,
- wherein the controlling includes switching control of the DC motor from open-loop control to closed-loop control when a predetermined time elapses, or speed of the DC motor or the roller reaches a predetermined speed after start of speed change of the DC motor or the roller.
Dependencies are inferred from the claim text.