Belt driving apparatus, image forming apparatus, belt driving method, and computer-readable medium for driving a belt
AssigneeRicoh Company, Ltd.
InventorYoshihiro Sakai
Life of this patent
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Abstract
A belt driving apparatus is disclosed, that uses feedback signals for executing feedback control of a motor that drives the rotation of a belt. The belt driving apparatus includes a first sensor for detecting an index of a scale formed along a peripheral direction of the belt, a second sensor for detecting a detection target cooperatively moving with the rotation of the belt, and a sensor switching part for selectively switching the feedback signals used for executing the feedback control of the motor. The feedback signals include first signals output from the first sensor and second signals output from the second sensor. The sensor switching part selects the first or second signals accordingly.
Claims17
A belt driving apparatus using feedback signals for executing feedback control of a motor that drives a rotation of a belt, the belt driving apparatus comprising:
- a first sensor for detecting an index of a scale formed along a peripheral direction of the belt;
- a second sensor for detecting a detection target cooperatively moving with the rotation of the belt;
- and a sensor switching part for selectively switching the feedback signals used for executing the feedback control of the motor, the feedback signals including first signals output from the first sensor and second signals output from the second sensor;
- wherein the sensor switching part selects the second signals as the feedback signals to be used during a period beginning at an activation of the motor and ending when a condition is satisfied,
- wherein the sensor switching part selects the first signals as the feedback signals to be used after the condition is satisfied with an exception that the use of the second signals as the feedback signals is continued even after the condition is satisfied without switching to use the first signals when a waveform of the first signals is irregular.
An image forming apparatus comprising:
- a motor for driving a rotation of a belt;
- a controller for executing feedback control of the motor by using feedback signals;
- a first sensor for detecting an index of a scale formed along a peripheral direction of the belt;
- a second sensor for detecting a detection target cooperatively moving with the rotation of the belt;
- and
- a sensor switching part for selectively switching the feedback signals used for executing the feedback control of the motor, the feedback signals including first signals output from the first sensor and second signals output from the second sensor;
- wherein the sensor switching part selects the second signals as the feedback signals to be used during a period beginning at an activation of the motor and ending when a condition is satisfied,
- wherein the sensor switching part selects the first signals as the feedback signals to be used after the condition is satisfied with an exception that the use of the second signals as the feedback signals is continued even after the condition is satisfied without switching to use the first signals when a waveform of the first signals is irregular.
A belt driving method for executing feedback control of a motor that drives a rotation of a belt, the method comprising:
- executing the feedback control according to first signals output from a first sensor that detects an index of a scale formed along a peripheral direction of the belt after a condition is satisfied;
- executing the feedback control according to second signals output from a second sensor that detects a detection target cooperatively moving with the rotation of the belt during a period beginning at an activation of the motor and ending when the condition is satisfied with an exception that the use of the second signals as the feedback signals is continued even after the condition is satisfied without switching to use the first signals when a waveform of the first signals is irregular.
A computer-readable medium on which a program is recorded for causing a computer to execute a belt driving method for executing feedback control of a motor that drives a rotation of a belt, the belt driving method comprising:
- executing the feedback control according to first signals output from a first sensor that detects an index of a scale formed along a peripheral direction of the belt after a predetermined condition is satisfied;
- executing the feedback control according to second signals output from a second sensor that detects a detection target cooperatively moving with the rotation of the belt during a period beginning at an activation of the motor and ending when the predetermined condition is satisfied with an exception that the use of the second signals as the feedback signals is continued even after the condition is satisfied without switching to use the first signals when a waveform of the first signals is irregular.
Dependencies are inferred from the claim text.