An image forming device including a forming unit, an adhesion amount detector, a correction coefficient determiner, and a correction unit. The forming unit forms line images each having a different line width. The adhesion amount detector detects a toner adhesion amount for each of the line images. The correction coefficient determiner determines, according to the toner adhesion amounts detected for each line width, correction coefficients for a gradation value of the line images of each line width. The correction unit corrects a gradation value of a line image using a correction coefficient corresponding to the line width of the line image when forming the line image.

An image forming apparatus includes a fixing portion and an optical sensor having first and second positioning holes and a connector. The fixing portion includes first and second screw holes, a through-hole, and an extension portion. If the optical sensor is placed on the fixing portion in a first orientation where the first positioning hole is aligned with the first screw hole and the second positioning hole is aligned with the second screw hole, the connector is inserted into the through-hole without interfering with the extension portion so that screws fix the optical sensor. If the optical sensor is placed on the fixing portion in a second orientation where the first positioning hole is aligned with the second screw hole and the second positioning hole is aligned with the first screw hole, the connector interferes with the extension portion so that the connector is not inserted into the through-hole.

To provide an image forming device that can be efficiently maintained. According to one embodiment, the image forming device includes a plurality of photoconductors, an exposure device, a developer, and a processor. The exposure device irradiates a corresponding surface of the plurality of photoconductors with light corresponding to an image formed on a corresponding photoconductor of the plurality of photoconductors. The developer supplies a toner to the corresponding surface of the plurality of photoconductors on which an electrostatic latent image is formed by the light emitted by the exposure device. The processor adjusts, for every photoconductor, a contrast potential for supplying the toner from the developer to the electrostatic latent image formed on the corresponding surface of the plurality of photoconductors, and notifies a warning when there is a contrast potential whose difference from another contrast potential exceeds a reference value.

An image forming apparatus includes an image forming unit configured to convey a recording medium and form an image on the recording medium based on an image forming condition; and a controller configured to control the image forming unit to form a test image and a scale image extending in a conveyance direction in which the recording medium is conveyed, obtain user instruction information related to a density fluctuation of the test image in the conveyance direction, and generate the image forming condition to suppress image density unevenness in the conveyance direction in an image to be formed by the image forming unit based on the user instruction information.

An image forming apparatus includes: a gear that transmits a drive force, which is supplied from a drive unit, to a photosensitive drum; a formation processing unit that, at arrival of each of specific formation timings, uses the photosensitive drum thereby to form a to-be-detected toner image that is based on a to-be-detected image having a specific density; an acquisition processing unit that acquires a variation width of a density in the to-be-detected toner image formed by the formation processing unit; and a determination processing unit that determines a failure timing of the gear based on the variation width for each of the formation timings.

An image forming apparatus includes an image forming portion, an image bearing member, a transfer member, a voltage source, a density detecting portion, a display portion, a controller, and an operating portion. The controller is capable of executing an operation in a mode in which a test chart for adjusting a transfer voltage is outputted, and setting information on the transfer voltage set for during transfer on the basis of a detection result when the test chart is detected by the detecting portion is displayed at the display portion and is checked by user. The controller causes the display portion to display setting information on the basis of a correcting value and causes the user to check the setting information in the operation in the mode executed after the correcting value is inputted from the operating portion.

An image forming apparatus includes a platen on which an original is to be placed, a feeder configured to feed an original placed on a tray, a sensor configured to detect a sheet on the tray, a lamp provided to the feeder, a reader configured to read the original placed on the platen and to read the original conveyed by the feeder, an image forming unit configured to form an image on a sheet, and a controller. The controller is configured to control the image forming unit to form a first test image on a sheet, control the reader to read the first test image formed on the sheet placed on the platen, control a density of the image to be formed by the image forming unit based on a reading result of the first test image.

An image forming apparatus including a controller configured to switch between a first speed printing where a polygon mirror rotates at a first speed and laser light is at a first power and a second speed printing where the polygon mirror rotates at a second speed slower than the first speed and laser light is at a second power lower than the first power. The polygon mirror rotates at the first speed and laser light is at the first power when a first test pattern is formed. The polygon mirror rotates at the first speed and laser light is at the second power when a second test pattern is formed. The first speed printing is executed based on a detection result of the first test pattern. The second speed printing is executed based on a detection result of the second test pattern.

An image forming apparatus, configured to operate in first and second modes of which color gamut is different from each other, includes an exposure unit configured to expose a photosensitive drum; a developing roller configured to form a toner image; a detection unit configured to detect density of the toner image transferred to an intermediate transfer member; and a controller configured to adjust the density based on a value of input image data. A dithering process for the controller's controlling of the exposure unit is different depending on whether the operation is in the first mode or the second mode, and in at least a part of the input image data, the density of the toner image formed by the dithering process in the first mode is higher than the density of the toner image formed by the dithering process in the second mode.

An image forming method, an image forming apparatus, and a storage medium are provided in embodiments of the present disclosure. The method includes rotating an image carrier along a preset direction, where the image carrier at least includes a first region and a second region; and simultaneously applying voltages to a first image forming module and a second image forming module, such that the first image forming module forms a first image on the first region of the image carrier based on the voltages, and the second image forming module forms a second image on the second region of the image carrier based on the voltages. Each of the first image and the second image includes a plurality of patterns with different concentrations; and a quantity of patterns in the first image and the second image is determined based on a first preset distance.