摘要:
An image forming apparatus comprises: an image forming mechanism including a motor, and an image forming unit which operates by the motor to form an image on a recording sheet; a registration unit which registers a job; a control unit which controls the image forming mechanism to form an image corresponding to the job registered through the registration unit on a recording sheet; a number obtaining unit which obtains the number of recording sheets required for the job registered through the registration unit; and a setting unit which sets a rotation speed of the motor according to the number of recording sheets obtained by the number obtaining unit. The control unit controls the image forming mechanism to form the image corresponding to the job registered through the registration unit on the recording sheet by rotating the motor at the rotation speed set by the setting unit.
摘要:
A conveyance device includes a linear encoder that outputs an encoder signal corresponding to displacement of a conveyed object. The encoder includes an encoder fence provided on an intersecting plane that intersects a reference plane orthogonal to a direction in which a guide element supports the conveyed object. The encoder fence is configured such that a plurality of light-transmitting portions and light-shielding portions are arranged alternately on a side of the encoder fence. The light-transmitting portions and the light-shielding portions are formed so that a first point on each boundary between each of the light-transmitting portions and each of the light-shielding portions adjacent to each other and a second point on the each boundary, which is positioned separately from the first point with respect to a direction along the side of the encoder fence and perpendicular to the conveying direction, are separately positioned with respect to the conveying direction.
摘要:
There is provided a control device configured to control a drive system including a motor and a driven object. The control device includes a controller configured to compute an operation amount, to measure a control amount of the controlled object, to input a measurement signal of the control amount to an inverse model of a model indicating input-output characteristics of the controlled object, and to generate a differential signal between an output of the inverse model and the operation amount; and a filter configured to filter the generated differential signal, and which has frequency characteristics of attenuating a vibrational component which is developed due to mechanical characteristics of the controlled object, from the differential signal. The controller is configured to make a judgment of whether or not a defect has occurred in the controlled object, based on an output of the filter.
摘要:
A toner supply apparatus 6 is configured to be able to supply a charged toner T to a latent image forming surface LS of a photoconductor drum 3. The toner supply apparatus 6 houses a toner electric field transport body 62. The toner electric field transport body 62 has first portions and second portions which differ in toner T transport force. The first portions and the second portions differ in structural feature, such as relative dielectric constant or thickness. By means of such a structural difference, the state of transport of the toner T on the toner transport surface TTS is appropriately set.
摘要:
A liquid ejection apparatus including: a liquid-ejection head having ejection openings to eject liquid to record an image on a recording medium; a sealing mechanism configured to selectively establish a sealed state and an unsealed state; a humid-air supply mechanism which supplies a humid air into the ejection space; and a controller, wherein, during the sealed state of the ejection space, the controller controls the humid-air supply mechanism to supply the humid air into the ejection space such that one of a density and a viscosity of the liquid to be ejected from the ejection openings becomes less than a predetermined appropriate value, and then controls the liquid-ejection head such that the liquid having an amount equal to or larger than a set amount is preliminarily ejected prior to the ejection of the liquid onto the recording medium for recording the image on the recording medium, is disclosed.
摘要:
An image forming device includes a photosensitive member and a charger for charging the photosensitive member. The photosensitive member has a photosensitive surface that moves in a moving direction and that is configured to form a latent electrostatic image thereon. The charger opposes the photosensitive surface and includes a wire electrode, a grid electrode and a shield electrode. The wire electrode is applied with a voltage for charging the photosensitive surface. The grid electrode is disposed between the wire electrode and the photosensitive surface. The shield electrode is arranged to partly surround the wire electrode, the shield electrode having a plurality of sections, the shield electrode having an opening at a side the same as the grid electrode with respect to the wire electrode, the shield electrode including a first end and a second end each facing the photosensitive surface, the first end being disposed upstream relative to the second end in the moving direction, the opening being defined between the first end and the second end, a shortest distance being defined between each of the plurality of sections of the shield electrode and the wire electrode and being a length of a straight line that connects the wire electrode and an imaginary plane extending along the each section and that is perpendicular to the imaginary plane, the shortest distances between the respective sections of the shield electrode and the wire electrode being equal to one another, a first distance defined between the first end and a reference plane being smaller than a second distance defined between the second end and the reference plane, the reference plane including the wire electrode and extending perpendicularly to the photosensitive surface.
摘要:
A developer supply device is provided, which includes a transfer board including an activating section and an always-transferring section. The activating section is disposed in a position close to a developer holding member and lower than a position where development agent is transferred onto the developer holding member. The activating section is supplied with an activating voltage for making the development agent leave a developer transfer path and drop into the developer storage section during an activating process performed at an initial stage of a developer transferring operation while supplied with the transfer bias voltage after the activating process. The always-transferring section is disposed across a position facing the developer storage section to a position lower than and adjacent to the activating section, and always supplied with a transfer bias voltage during the developer transferring operation.
摘要:
A drive control device includes a signal generation unit, a position detection unit, a speed detection unit, and a drive control unit. Based on at least one light receiving signal inputted from at least one light receiving unit of an encoder, the signal generation unit digitizes the at least one light receiving signal to generate at least one non-interpolated digital encoder signal, and digitizes and interpolates the at least one light receiving signal to generate at least one interpolated digital encoder signal. The position detection unit detects a position of an object based on the at least one interpolated digital encoder signal. The speed detection unit detects a speed of the object based on the at least one non-interpolated digital encoder signal. The drive control unit performs a drive control of the object based on the above-detected position and speed.
摘要:
There is provided an image formation device comprising an electrostatic latent image holding body having an latent image formation surface on which an electrostatic latent image is formed, a developer supply unit to supply developer to the electrostatic latent image holding body to form, on the latent image formation surface, a developer image corresponding to the electrostatic latent image; a developer transfer unit located to face the electrostatic latent image holding body to transfer the developer image to a developer image holding surface; and a contacting member to contact the latent image formation surface at a stage which is after formation of the developer image and before transfer of the developer image to the developer image holding surface.
摘要:
There is provided an image formation device, comprising a developer holding body having a developer holding surface; and a developer supply unit to supply the developer to a first position facing the developer holding surface by carrying the developer in a developer transport direction intersecting with the main scanning direction through use of effect of an electric field. The developer supply unit comprises a plurality of carrying electrodes each of which is formed to have a longer side extending along the main scanning direction. The carrying electrodes are arranged along the developer transport direction to carry the developer when a drive voltage is applied to the carrying electrodes. The developer supply unit has a developer carrying area formed such that, in the main scanning direction, the developer carrying area becomes narrower from an upstream side in the developer transport direction toward the first position along the developer transport direction.