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US 7,733,041 B2Granted
Method and device for driving rotating-body, process cartridge, image forming apparatus, and computer program product
AssigneeRicoh Company, Ltd.
InventorYuusuke Ishizaki
Life of this patent
Estimating the term…
Abstract
A plurality of detection target portions are arranged around a rotating shaft of a rotating-body, one of which causes a detector to generate a first detection signal different from a second detection signal generated from the others. A first generating unit generates a reference signal indicating a reference rotational-position of the rotation-driving source or the rotating-body before one rotation from a timing of the first detection signal. A second generating unit reads periodic variation information from a storage unit based on the reference signal, and generates a rotation-velocity correction signal for the rotation-driving source.
Claims17
A device for driving a rotating-body, the device comprising:
- a rotation-driving source that outputs a rotation force;
- a transmission mechanism that transmits the rotation force of the rotation-driving source;
- a rotating-body that is connected to the transmission mechanism and that is rotated by the rotation force of the rotation-driving source;
- a plurality of detection target portions arranged around a rotating shaft of the rotating-body, one of the detection target portions causes a first detection signal to be generated, which is different from a second detection signal generated from other of the detection target portions;
- a detector that detects the detection target portions at a predetermined rotational-position, and generates the detection signals;
- a first reference-signal generating unit that generates a reference signal for indicating a reference rotational-position of the rotation-driving source or the rotating-body before one rotation of the rotation-driving source or the rotating-body from a timing of the first detection signal;
- a storage unit that stores measured values of periodic variation information about rotation velocity of the rotating-body, linked to phase of the rotating-body determined based on the reference signal;
- and
- a signal generating unit that reads the periodic variation information from the storage unit based on the reference signal, and generates a rotation-velocity correction signal for the rotation-driving source.
6 more elements
A device for driving a rotating-body, the device comprising:
- a rotation-driving source that outputs a rotation force;
- a transmission mechanism that transmits the rotation force of the rotation-driving source;
- a rotating-body that is connected to the transmission mechanism and that is rotated by the rotation force of the rotation-driving source;
- a plurality of detection target portions arranged around a rotating shaft of the rotating-body, one of the detection target portions causes a first detection signal to be generated, which is different from a second detection signal generated from other of the detection target portions;
- a plurality of detectors that detect the detection target portions at each predetermined rotational-position, and generate the detection signals;
- a first reference-signal generating unit that generates a reference signal for indicating a reference rotational-position of the rotation-driving source or the rotating-body whenever the rotation-driving source or the rotating-body rotates once based on a timing of the first detection signal that is generated first by the detectors;
- a storage unit that stores a plurality of sets of measured values of periodic variation information about rotation velocity of the rotating-body, each of the sets of the measured values of the periodic variation information being linked to phase of the rotating-body determined based on the reference signal generated using each of the detectors;
- and
- a signal generating unit that reads one set of the sets of measured values of the periodic variation information, which is linked to phase of the rotating-body determined based on the reference signal generated using one of the detectors that first generates the first detection signal when starting correction, from the storage unit based on the reference signal, and generates a rotation-velocity correction signal for the rotation-driving source.
6 more elements
A method of driving a rotating-body, the method comprising:
- measuring including
- rotating a rotation-driving source at a fixed velocity to output a rotation force,
- supplying the rotation force to the rotating-body via a transmission mechanism, and
- measuring periodic variation of rotation velocity of the rotating-body;
- storing measured periodic variation information linked to phase of the rotating-body determined based on reference rotational-position information of the rotating-body;
- detecting including
- rotating the rotation-driving source at a fixed velocity, and
- detecting that one of a plurality of detection target portions arranged around a rotating shaft of the rotating-body from which a first detection signal different from a second detection signal generated from other of the detection target portions is generated exists at a predetermined rotational-position;
- first generating including
- generating a reference signal for indicating the reference rotational-position of the rotation-driving source or the rotating-body before the rotation-driving source or the rotating-body rotates once after the one of the detection target portions is detected;
- and
- second generating including
- reading the periodic variation information based on the reference signal, and
- generating a rotation-velocity correction signal for the rotation-driving source.
11 more elements
Dependencies are inferred from the claim text.