Abstract: A motor controlling method according to the present invention involves causing rotation of a motor to commence by applying an initial power that can cause movement of an object to be transported to commence, to the motor; obtaining a position of the object to be transported after the motor has been controlled so as to cause the object to be transported to move to a target position based on a signal outputted in response to the rotation of the motor; and correcting an initial power to be used when movement of the object to be transported is caused to commence a next time in response to a difference between the target position and the obtained position of the object to be transported.

Abstract: There are included a control circuit to control sequence of excitation of a stepping motor, a switching circuit to switch electric power to be supplied to the stepping motor based on an instruction from the control circuit, and a stop circuit to stop an operation of the switching circuit in a case where temperature of the switching circuit becomes a specified temperature or higher, and the control circuit controls the switching circuit in a mode where the stop circuit operates before the stepping motor is damaged by heat.

Abstract: An image reading method according to the present invention involves causing an image sensor for reading an image of a document to move from a side at which the document is placed toward a home position of the image sensor, causing to reverse a movement direction at a turn-back position after the image sensor has passed the home position, and causing the image sensor to move to the home position again.

Abstract: There are included a control circuit to control sequence of excitation of a stepping motor, a switching circuit to switch electric power to be supplied to the stepping motor based on an instruction from the control circuit, and a stop circuit to stop an operation of the switching circuit in a case where temperature of the switching circuit becomes a specified temperature or higher, and the control circuit controls the switching circuit in a mode where the stop circuit operates before the stepping motor is damaged by heat.

Abstract: A stepping motor control apparatus includes a control circuit to control the excitation sequence of a stepping motor, and a switching circuit to switch electric power to be supplied to the stepping motor based on an instruction from the control circuit, and when the stepping motor is rotated from a stop state, the control circuit executes an acceleration processing after sending pulses at a frequency not higher than a maximum self-start frequency.

Abstract: A printer is provided with: a detector, operable to output an output signal in accordance with a state of a printing medium transported within the printer; and a control signal generator, operable to generate a control signal in accordance with a level of the output signal relative to a threshold. In order to control the printer, the output signal is detected. A timing signal indicative of a timing to judge the state of the printing medium is detected.

Abstract: A motor control device for controlling rotation of a motor by controlling a driving voltage applied to the motor is provided. The device includes a driving voltage control unit configured to control the driving voltage, and a detecting unit configured to detect rotation of the motor. The motor has operating characteristics indicative of relationship between the driving voltage and a rotation speed of the motor, where the operating characteristics have a specific dead-band range of driving voltages wherein the rotation speed of the motor is zero regardless of changes in the driving voltage. The driving voltage control unit performs a low rotation control operation including at least one alternating repetition of a first control operation and a second control operation.

Abstract: A scanner provided with an image sensor that integrates reflected light that occurs due to reflections from a scan position, and then converts into specific image data the reflected light that has been integrated, and outputs this image data, wherein a plurality of segments, in the scan direction are provided for an object to be scanned by moving a scan position in the scan direction in the object to be scanned, where an image sensor is controlled so that, when the scan position passes over each of the segments of the object to be scanned, because of the motion of a carriage, the image sensor is controlled so as to start integrating the reflected light that occurs at the scan position with the timing with which the scan position enters into each of the segments of the object to be scanned, and thereafter, the image sensor is caused to stop integrating the reflected light after a specific amount of time has elapsed, where the reflected light that has been integrated is converted by the image sensor and outputt

Abstract: A stepping motor control method including: supplying hold current for holding a rotor of a stepping motor at a prescribed angle to the stepping motor as required while the stepping motor stops; performing a phase change at a frequency lower than a maximum self-start frequency when the stepping motor is rotated, under a state that the hold current is not supplied to the stepping motor, from a stopping state; and then, performing an accelerating process.

Abstract: There are included a control circuit to control sequence of excitation of a stepping motor, a switching circuit to switch electric power to be supplied to the stepping motor based on an instruction from the control circuit, and a stop circuit to stop an operation of the switching circuit in a case where temperature of the switching circuit becomes a specified temperature or higher, and the control circuit controls the switching circuit in a mode where the stop circuit operates before the stepping motor is damaged by heat

Abstract: A stepping motor control apparatus includes a control circuit to control the excitation sequence of a stepping motor, and a switching circuit to switch electric power to be supplied to the stepping motor based on an instruction from the control circuit, and when the stepping motor is rotated from a stop state, the control circuit executes an acceleration processing after sending pulses at a frequency not higher than a maximum self-start frequency.

Abstract: A belt driving apparatus has a motor for generating the driving force, a toothed driving pulley rotating by the driving force, an endless toothed belt wound on the pulley, wherein a first surface of the toothed belt has teeth corresponding to teeth of the pulley and a second surface of the toothed belt is substantially smooth, an auxiliary roller for holding the toothed belt in a gap defined by the pulley and the auxiliary roller, a roller holding unit for holding the pulley and the auxiliary roller to be able to respectively rotate on axes of the pulley and the auxiliary roller and maintaining the gap between the pulley and the auxiliary roller and an urging member for urging the roller holding unit in a direction to the toothed belt around the pulley in order for the auxiliary roller hold by the roller holding unit to provide a tension to the toothed belt.

Abstract: A first current supplier supplies a first current to a first phase coil of a motor. A second current supplier supplies a second current to a second phase coil of the motor. A current selector selects a value of the first current and a value of the second current, so as to make constant at least one of a magnitude of a synthetic vector obtained by the selected value of the first current and the selected value of the second current at every microstep driving step of the motor, and an angular interval between synthetic vectors corresponding to adjacent microstep driving steps of the motor.

Abstract: A recording medium transfer apparatus includes a motor control unit for controlling the motor to rotate at higher speed when the recording medium is fed to the liquid ejection area than that when the recording medium is discharged out of the liquid ejection area, and a feed control unit for controlling a next recording medium to be fed simultaneously with discharge of the recording medium, if a position of a rear end of the recording medium when recording or printing has been finished is situated upstream of a predetermined position, which is upstream of the discharge roller as much as a distance between a feed start position of the recording medium and the liquid ejection area, whereas controlling the next recording medium to start to be fed after discharge of the recording medium has been finished, if the position of the rear end of the recording medium when recording or printing has been finished is situated downstream of the predetermined position.

Abstract: A belt driving apparatus has a motor for generating the driving force, a toothed driving pulley rotating by the driving force, an endless toothed belt wound on the pulley, wherein a first surface of the toothed belt has teeth corresponding to teeth of the pulley and a second surface of the toothed belt is substantially smooth, an auxiliary roller for holding the toothed belt in a gap defined by the pulley and the auxiliary roller, a roller holding unit for holding the pulley and the auxiliary roller to be able to respectively rotate on axes of the pulley and the auxiliary roller and maintaining the gap between the pulley and the auxiliary roller and an urging member for urging the roller holding unit in a direction to the toothed belt around the pulley in order for the auxiliary roller hold by the roller holding unit to provide a tension to the toothed belt.

Abstract: A first current supplier supplies a first current to a first phase coil of a motor. A second current supplier supplies a second current to a second phase coil of the motor. A current selector selects a value of the first current and a value of the second current, so as to make constant at least one of a magnitude of a synthetic vector obtained by the selected value of the first current and the selected value of the second current at every microstep driving step of the motor, and an angular interval between synthetic vectors corresponding to adjacent microstep driving steps of the motor.