Transport device, image forming device, transport method, and recording medium
AssigneeRicoh Company, Ltd.
InventorMinoru Takahashi
Life of this patent
Estimating the term…
Abstract
In a transport device, a first speed control unit controls a rotating speed of a first roller driving unit to reach a first target speed, and a second speed control unit controls a rotating speed of a second roller driving unit to reach a second target speed. The second speed control unit is arranged to perform, when a print medium is transported by both a first transport roller unit and a second transport roller unit, a follower control having a response sensibility to speed fluctuations in a predetermined frequency region of a control system, which is smaller than a response sensibility when the print medium is transported by the second transport roller unit solely.
Claims14
A transport device, comprising:
- a first transport roller unit that transports a sheet-like print medium along a transport path in a transporting direction;
- a second transport roller unit that is disposed at one of a downstream location and an upstream location of the first transport roller unit along the transport path and transports the print medium in the transporting direction;
- a first roller driving unit that rotates the first transport roller unit;
- a second roller driving unit that rotates the second transport roller unit;
- a first speed control unit that controls a rotating speed of the first roller driving unit to reach a first target speed;
- and
- a second speed control unit that controls a rotating speed of the second roller driving unit to reach a second target speed,
- wherein the second speed control unit is arranged to perform, when the print medium is transported by both the first transport roller unit and the second transport roller unit, a follower control having a response sensibility to speed fluctuations in a predetermined frequency region of a control system, which is smaller than a response sensibility when the print medium is transported by the second transport roller unit solely.
A transport method for use in a transport device including a first transport roller unit that transports a sheet-like print medium along a transport path in a transporting direction, a second transport roller unit that is disposed at one of a downstream location and an upstream location of the first transport roller unit along the transport path and transports the print medium in the transporting direction, a first roller driving unit that rotates the first transport roller unit, a second roller driving unit that rotates the second transport roller unit, a first speed control unit that controls a rotating speed of the first roller driving unit to reach a first target speed, and a second speed control unit that controls a rotating speed of the second roller driving unit to reach a second target speed, the transport method comprising:
- detecting, by the second speed control unit, whether the print medium is transported by both the first transport roller unit and the second transport roller unit;
- and
- performing, by the second speed control unit, when it is detected that the print medium is transported by both the first transport roller unit and the second transport roller unit, a follower control having a response sensibility to speed fluctuations in a predetermined frequency region of a control system, which is smaller than a response sensibility when the print medium is transported by the second transport roller unit solely.
A non-transitory computer-readable recording medium storing a program which, when executed by a computer, causes the computer to perform a transport method for use in a transport device including a first transport roller unit that transports a sheet-like print medium along a transport path in a transporting direction, a second transport roller unit that is disposed at one of a downstream location and an upstream location of the first transport roller unit along the transport path and transports the print medium in the transporting direction, a first roller driving unit that rotates the first transport roller unit, a second roller driving unit that rotates the second transport roller unit, a first speed control unit that controls a rotating speed of the first roller driving unit to reach a first target speed, and a second speed control unit that controls a rotating speed of the second roller driving unit to reach a second target speed, the transport method comprising:
- detecting, by the second speed control unit, whether the print medium is transported by both the first transport roller unit and the second transport roller unit;
- and
- performing, by the second speed control unit, when it is detected that the print medium is transported by both the first transport roller unit and the second transport roller unit, a follower control having a response sensibility to speed fluctuations in a predetermined frequency region of a control system, which is smaller than a response sensibility when the print medium is transported by the second transport roller unit solely.
Dependencies are inferred from the claim text.