A motor control apparatus, includes: a voltage control unit configured to control a voltage to apply to a plurality of coils in order to cause a rotor of a motor that includes the plurality of coils to rotate; a holding unit configured to hold information that indicates a magnitude of a load of the motor; and a detection unit configured to, based on the information that indicates the magnitude of the load that is held by the holding unit, set a detection condition for a stop position of the rotor, and perform detection processing of the stop position of the rotor in accordance with the set detection condition.

A motor control apparatus includes: a switching power supply; a first motor configured to operate with a voltage from the switching power supply; and a control unit configured to control the first motor, wherein the control unit is further configured to cause the switching power supply to supply power of the switching power supply to a load other than the first motor before detecting an initial position of a rotor of the first motor using a current flowing through the first motor.

A layer transfer device configured to transfer at least one layer of a multilayer film onto a toner image includes: a sheet conveying unit; a supply reel; a wind-up reel; a film transfer unit; and a peeling roller disposed between the film transfer unit and the wind-up reel in a conveyance path and configured to peel off the multilayer film from a sheet, and the film transfer unit includes: a first roller provided to contact the sheet; and a second roller provided to contact the multilayer film, and a tangent line of the second roller at a downstream end of a nip part passes between a center of the second roller and a center of the peeling roller, and an angle formed by the tangent line and a film tension portion of the multilayer film tensed between the nip part and the peeling roller is 15 to 37 degrees.

An image forming apparatus includes a brilliant image forming part that forms a brilliant toner image using a brilliant toner, a color image forming part that forms a color toner image using a color toner, and a controller that controls a brilliant deposition amount of the brilliant toner and a color deposition amount of the color toner on a medium, wherein when the brilliant toner image is to be superimposed over the color toner image on the medium, the controller adjusts the brilliant deposition amount for the brilliant toner image in correspondence with a color type and the color deposition amount of the color toner that has been used for the color toner image.

A power supply includes a first control circuit configured to control an output voltage of the power supply, a second control circuit configured to control an output current of the power supply, a switching circuit configured to switch control of the power supply from the first control circuit to the second control circuit based on the output current of the power supply while the first control circuit controls the output voltage of the power supply, and a power supply control circuit configured to output status information indicating a failure of the power supply acquired based on the output voltage of the power supply while the second control circuit controls the output current of the power supply.

After outputting a first start signal for causing an image forming unit to start formation of an image for a first side of an i-th sheet, a controller causes a feeding member to start feeding of the i-th sheet, and determines whether or not the i-th sheet has already been detected by a detector. In a case where the i-th sheet has been detected before a predetermined time has elapsed, the controller outputs a second start signal for causing the image forming unit to start formation of an image for second side of an (i−1)th sheet. In a case where the i-th sheet has not been detected before the predetermined time has elapsed, the controller outputs the second start signal after the i-th sheet is detected.

An image-forming apparatus includes a motor, a photosensitive drum, a developing roller, and a separation mechanism for moving the developing roller relative to the photosensitive drum. The separation mechanism includes: an end cam rotatable in a rotational direction; and a cam follower movable in accordance with a rotation of the end cam. The end cam includes a first surface, a second surface, a first sloped surface connecting the second surface to the first surface, and a second sloped surface connecting the first surface to the second surface in the rotational direction. The second sloped surface includes: a steep slope surface connected to the second surface; and a gentle slope surface connecting the first surface to the steep slope surface. The gentle slope surface slopes relative to the first surface by an angle smaller than an angle by which the steep slope surface slopes relative to the first surface.

A method of calibrating a developer unit of a liquid electrophotographic printer, the method comprising: setting a developer roller voltage and iteratively printing a patch on a print medium using different electrode voltages until a hue of a patch printed using one of the electrode voltages is within a tolerance of a target hue; and setting an electrode voltage based on said one of the electrode voltages and iteratively printing a patch on a print medium using different developer roller voltages until a hue of a patch printed using one of the developer roller voltages is within the tolerance of the target hue.

An image forming apparatus includes a first sensor configured to measure a measurement image on a first photoreceptor, a second sensor configured to measure a measurement image on an intermediate transfer member, and a controller. The controller controls the first image forming unit to form first measurement images, wherein the first measurement images are formed along a rotation direction of the first photoreceptor, and controls the first sensor to measure the first measurement images on the first photoreceptor. The controller further controls the first image forming unit and the second image forming unit to form a plurality of measurement images while a rotation speed of the first photoreceptor is being controlled based on a measurement result of the first sensor, wherein the plurality of measurement images is formed along the predetermined direction of the intermediate transfer member.

An image forming apparatus includes an image forming portion, an oblique movement correcting portion including a first registration roller pair and a first moving portion, a reversing portion, and a re-feeding portion. The reversing portion includes a reversing roller pair and a second moving portion. The re-feeding portion includes a second registration roller pair. When an image is formed on a second surface of a sheet opposite from a first surface of the sheet, a side end position of the sheet is corrected by the second moving portion and oblique movement of the sheet is corrected, and then the side end position of the sheet is corrected again by the first moving means and the sheet is fed to the image forming portion.