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US 2006/0140685 A1Published application
Image forming apparatus and image forming method
AssigneeBrother Kogyo Kabushiki Kaisha
InventorKazushige Muroi
Life of this patent
Estimating the term…
Abstract
If a velocity calculated by a velocity calculating unit deviates from a normal range, a target velocity is used as a feedback amount, an actuation amount corresponding to a deviation Ve=0 between the feedback amount Vf=Vt and the target velocity Vt is calculated, and a driving power corresponding to this actuation amount is supplied to a motor. A conveyor belt can be driven stably without causing irregularity in a speed of the conveyor belt.
Claims13
An image forming apparatus comprising:
- a rotating body rotating integrally with a plurality of marks provided at intervals with one another;
- a sensor that outputs a pulse whenever each mark is detected;
- an actual interval measuring unit that measures an actual interval that is an output interval of the pulse from the sensor;
- a selecting unit that, if a current actual interval measured by the actual interval measuring unit is within a predetermined normal range, selects the current actual interval as a feedback amount, and that, if a current actual interval measured by the actual interval measuring unit is out of the normal range, selects a mean value of a plurality of actual intervals measured in the past by the actual interval measuring unit instead of the current actual interval, as the feedback amount;
- and
- a control unit that compares a target interval that is a target value of the output interval of the pulse from the sensor with the feedback amount selected by the selecting unit to control rotation of the rotating body in a feedback manner so that a deviation between the target interval and the feedback amount becomes zero.
3 more elements
An image forming apparatus comprising:
- a rotating body rotating integrally with a plurality of marks provided at intervals with one another;
- a sensor that outputs pulses whenever each mark is detected;
- an actual interval measuring unit that measures an actual interval that is an output interval of the pulses from the sensor;
- a selecting unit that, if a current actual interval measured by the actual interval measuring unit is within a predetermined normal range, selects the current actual interval as a feedback amount, and that, if a current actual interval measured by the actual interval measuring unit is out of the predetermined normal range, selects a target interval that is a target value of the output interval of the pulses from the sensor, instead of the current actual interval, as a feedback amount;
- and
- a control unit that compares the target interval with the feedback amount selected by the selecting unit to control rotation of the rotating body in a feedback manner so that a deviation between the target interval and the feedback amount becomes zero.
3 more elements
An image forming method, comprising:
- rotating a rotating body integrally with a plurality of marks provided at intervals with one another;
- outputting a pulse from a sensor whenever each mark is detected;
- measuring, by an actual interval measuring unit, an actual interval that is an output interval of the pulse from the sensor;
- selecting a current actual interval as a feedback amount, by a selecting unit, if the current actual interval measured by the actual interval measuring unit is within a predetermined normal range, and
- selecting a mean value of a plurality of actual intervals measured in the past by the actual interval measuring unit instead of the current actual interval, as the feedback amount, by the selecting unit, if the current actual interval measured by the actual interval measuring unit is out of the normal range;
- and
- comparing, by a control unit, a target interval that is a target value of the output interval of the pulse from the sensor with the feedback amount selected by the selecting unit to control rotation of the rotating body in a feedback manner so that a deviation between the target interval and the feedback amount becomes zero.
4 more elements
Dependencies are inferred from the claim text.