An image forming apparatus includes: an image forming unit configured to form an image pattern on a medium, a predetermined image repeatedly appearing in a first cycle in a sub scanning direction in the image pattern; a density detector configured to optically detect a density of the image pattern in the sub scanning direction; a cyclic image detector configured to detect a feature image having a second cycle corresponding to the first cycle in accordance with a result of the detection; and a state determining unit configured to determine whether a cycle depending on an outer circumference of a rotary member included in the image forming apparatus corresponds to the second cycle when the feature image is detected by the cyclic image detector, and determine that a state of the rotary member has deteriorated when the cycle depending on the outer circumference is determined to correspond to the second cycle.

Provided is an image processing apparatus to form an image on a sheet of paper, including a main body and a submodule detachably disposed on the main body. The main body includes an asynchronous serial bus and a master control unit. The submodule includes a slave control unit. An interactive asynchronous serial communication is performed between the master control unit and slave control unit. The master control unit includes a detection timing changing unit. The detection timing changing unit changes a scheduled timing to detect a second signal. The slave control unit includes a transmission signal changing unit. The transmission signal changing unit changes a state of the second signal from a first state detectable by the master control unit at a first timing to a second state detectable by the master control unit at a second timing.

An electrophotographic image forming apparatus which sequentially performs charging, exposure, development, transfer and cleaning on each surface portion of a photoreceptor during rotation includes: a cleaning blade configured to scrape off toner from the surface of the photoreceptor; a detecting unit configured to detect a rotation angle of the photoreceptor; and a control unit configured to control each of a start process and an end process of rotation of the photoreceptor and charging, development and transfer of the photoreceptor, wherein, in the end process, the control unit estimates a position of a surface portion of the photoreceptor, at which a charged state caused by a peeling discharge remains even after the stop of the photoreceptor, from the rotation angle from the time of start of deceleration of the photoreceptor to the time of stop of the photoreceptor, and adjusts parameters necessary for the next start process or end process.

A motor control apparatus operates in a first control mode in which the values of a torque current component and an excitation current component are controlled so that the difference between an instruction phase and a rotation phase is decreased and a second control mode in which constant current is supplied to a winding of a motor. The second control mode is switched to the first control mode if the rotation speed is varied from a value lower than a first threshold value to a value not lower than the first threshold value in the second control mode and the first control mode is kept even if the rotation speed is varied from a value not lower than the first threshold value to a value that is not lower than a second threshold value and that is lower than the first threshold value in the first control mode.

A volt meter and a current meter may measure a voltage and a current for the calculation of power consumption. A controller may calculate the power consumption when a heating element is activated and when the heating element is deactivated. Based on the power consumptions when the heating element is activated or deactivated, a failure condition may be determined.

An apparatus may include a power connection to receive an input power and a volt meter coupled to the power connection. The volt meter may be to measure an input voltage of the input power. A controller may be coupled to a heating element and the volt meter. The controller may control the heating element based on the input voltage measured by the volt meter.

There is provided an information processing apparatus and a control method thereof. The information processing apparatus and a control method acquires user information from an external apparatus by using near field wireless communication, determines how to handle the acquired user information according to a type of a screen displayed by a display unit. For example, when the displayed screen is an authentication screen, authentication processing is executed by using the acquired user information.

An operation method of an image forming apparatus including determining a state of a toner refill operation of injecting toner from a toner reload kit (TRK) to a cartridge in the image forming apparatus; when determined the injecting of the toner into the cartridge is completed, controlling the TRK to store information indicating a toner refill completion in a memory of the TRK; and updating information of an amount of remaining toner of the cartridge, based on an amount of the toner injected into the cartridge from the TRK.

An image forming apparatus includes a belt unit capable of being inserted into and pulled out of the apparatus, the belt unit including a movable endless belt, a supporting frame supporting the endless belt and having an accommodating portion, a grip member which is provided on the supporting frame at a position outside the belt in a widthwise direction of the belt that is orthogonal to a moving direction of the belt and which is movable between a first position in which the grip member is projected out of the accommodating portion in a direction orthogonal to the widthwise direction and a second position in which the grip member is accommodated in the accommodating portion, and an urging member configured to urge the grip member in a direction from the second position toward the first position.

A device having a function of adjusting image processing such as PWM setting, printer density setting and engine speed downstream of a video counter or a dot counter determines a correction coefficient of a video count value or a dot count value, according to a combination of adjustment values of image processing for realizing configured print settings, and corrects the count value by applying the correction coefficient to the video count value or the dot count value.