Motor control apparatus, image forming apparatus, and motor control method
First Claim
1. A motor control apparatus configured to control a drive and stop operation of a motor, comprising:
- a counting unit configured to count-up or count-down a count value of a timer from an initial value with a lapse of time in response to receiving an operation start instruction;
a signal output unit configured to compare an output compare value with the count value of the timer simultaneously with a start of the counting by the counting unit, output a first state signal until the count value reaches the output compare value, and output a second state signal simultaneously when the count value reaches the output compare value;
a drive unit configured to output to the motor a first control signal to drive the motor in response to receiving the first state signal from the signal output unit, and output to the motor a second control signal to stop the motor in response to receiving the second state signal from the signal output unit; and
a control unit configured toperform a drive time extension process to reset the count value to the initial value in response to a determination that the count value has reached a first threshold value that is smaller than the output compare value, and that a state of an output signal from a sensor is a first state, andterminate the drive time extension process in response to a determination that the count value has reached the first threshold value and that the state of the output signal from the sensor has changed from the first state to a second state.
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Accused Products
Abstract
A motor control apparatus controls a start/stop operation of a motor and includes a counting unit that performs a count-up or count-down operation from a predetermined initial value with a lapse of time in response to receiving an operation start instruction for the motor; a signal output unit that outputs a first state signal in response to receiving the operation start instruction, and outputs a second state signal only when a result of the counting by the counting unit falls outside a predetermined range; and a drive unit that outputs an ON signal to the motor in response to receiving the first state signal from the signal output unit, and outputs an OFF signal to the motor in response to receiving the second state signal from the signal output unit.
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Citations
19 Claims
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1. A motor control apparatus configured to control a drive and stop operation of a motor, comprising:
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a counting unit configured to count-up or count-down a count value of a timer from an initial value with a lapse of time in response to receiving an operation start instruction; a signal output unit configured to compare an output compare value with the count value of the timer simultaneously with a start of the counting by the counting unit, output a first state signal until the count value reaches the output compare value, and output a second state signal simultaneously when the count value reaches the output compare value; a drive unit configured to output to the motor a first control signal to drive the motor in response to receiving the first state signal from the signal output unit, and output to the motor a second control signal to stop the motor in response to receiving the second state signal from the signal output unit; and a control unit configured to perform a drive time extension process to reset the count value to the initial value in response to a determination that the count value has reached a first threshold value that is smaller than the output compare value, and that a state of an output signal from a sensor is a first state, and terminate the drive time extension process in response to a determination that the count value has reached the first threshold value and that the state of the output signal from the sensor has changed from the first state to a second state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A motor control method for use in a motor control apparatus which controls a drive and stop operation of a motor, the method comprising:
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performing, by a counting unit, a count-up or count-down operation of a timer from an initial value with a lapse of time in response to receiving an operation start instruction; comparing, by a signal output unit, an output compare value with a count value of the timer simultaneously with a start of the counting by the counting unit; outputting, by the signal output unit, a first state signal until the count value reaches the output compare value; outputting, by the signal output unit, a second state signal simultaneously when the count value reaches the output compare value; outputting, by a drive unit, to the motor a first control signal to drive the motor in response to receiving the first state signal from the signal output unit; outputting, by the drive unit, to the motor a second control signal to stop the motor in response to receiving the second state signal from the signal output unit; performing, by a control unit, a drive time extension process to reset the count value to the initial value in response to a determination that the count value has reached a first threshold value that is smaller than the output compare value, and that a state of an output signal from a sensor is a first state; and terminating, by the control unit, the drive time extension process in response to a determination that the count value has reached the first threshold value and that the state of the output signal from the sensor has changed from the first state to a second state. - View Dependent Claims (9, 10, 11)
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12. An apparatus for controlling an operation of a motor, comprising:
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a memory having a first set of computer readable instructions stored thereon; and at least one processor configured to execute the first set of computer readable instructions to, output a first operation instruction to a controller based on a determination that a state of an output signal from a sensor changes from a first state to a second state, the second state corresponding to the apparatus having no toner, the first operation instruction corresponding to incrementing of a timer in the controller from an initial value and a driving of the motor, output a second operation instruction to the controller if the state of the output signal from the sensor changes from the second state to the first state, the first state corresponding to the apparatus having toner, the second operation instruction corresponding to continuing incrementing of the timer and stopping the driving of the motor, perform a drive time extension process to reset a count value of the timer to an initial value in response to a determination that the count value has reached a first threshold value that is smaller than an output compare value, and that the state of the output signal from the sensor is the second state, and terminate the drive time extension process to reset the count value to the initial value in response to a determination that the count value has reached the first threshold value and that the state of the output signal from the sensor has changed from the second state to the first state. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification