Abstract: An image forming apparatus is configured to execute image forming processing of forming an image on a sheet. The apparatus includes a photosensitive drum, a fixing device including a heater and a roller, a main motor configured to generate a driving force, a driving mechanism having a connected state in which the driving force is transmittable to both the roller and the photosensitive drum, and a disconnected state in which the driving force is transmittable to the roller but is not transmitted to the photosensitive drum, a temperature sensor configured to detect a temperature of the fixing device, and a controller. In a case where the image forming processing is started, the controller sets the driving mechanism into the disconnected state, rotates the main motor at a preheating speed, and executes preheating processing in which the fixing device is heated by the heater.

Abstract: An image forming apparatus is configured to execute image forming processing of forming an image on a sheet. The apparatus includes a photosensitive drum, a fixing device including a heater and a roller, a main motor configured to generate a driving force, a driving mechanism having a connected state in which the driving force is transmittable to both the roller and the photosensitive drum, and a disconnected state in which the driving force is transmittable to the roller but is not transmitted to the photosensitive drum, a temperature sensor configured to detect a temperature of the fixing device, and a controller. In a case where the image forming processing is started, the controller sets the driving mechanism into the disconnected state, rotates the main motor at a preheating speed, and executes preheating processing in which the fixing device is heated by the heater.

Abstract: An image forming apparatus is configured to perform image forming processing. The image forming apparatus includes a photosensitive drum, a main motor configured to generate a driving force, a drum clutch having a transmission state in which the driving force is transmitted to the photosensitive drum and a disconnected state in which the driving force is not transmitted to the photosensitive drum, a sheet sensor configured to detect a rear edge of a sheet upstream of the photosensitive drum in a sheet conveying direction, and a controller. In a case where a start command for subsequent image forming processing is not received after the sheet sensor detects a rear edge of a last sheet in image forming processing performed based on received print data, the controller executes drum clutch disconnection processing, and then executes main motor rotation stop processing.

Abstract: In an image forming apparatus, an image bearing member and a cleaning member are in contact with each other to form a collection nip. A conveyance member is in contact with the image bearing member to form a conveyance nip. The controller executes a maintenance mode including a toner supply process, an output process, and a sheet feeding process. The toner supply process supplies at least part of the image bearing member with a predetermined amount of toner. The output process controls a circuit to output the cleaning voltage to the cleaning member. The sheet feeding process controls the feeding member to start feeding the sheet so that the sheet passes the conveyance nip in coincidence with the at least part of the image bearing member passing the conveyance nip after the at least part of the image bearing member has once passed the collection nip.

Abstract: In an image forming apparatus, an image bearing member and a cleaning member are in contact with each other to form a collection nip. A conveyance member is in contact with the image bearing member to form a conveyance nip. The controller executes a maintenance mode including a toner supply process, an output process, and a sheet feeding process. The toner supply process supplies at least part of the image bearing member with a predetermined amount of toner. The output process controls a circuit to output the cleaning voltage to the cleaning member. The sheet feeding process controls the feeding member to start feeding the sheet so that the sheet passes the conveyance nip in coincidence with the at least part of the image bearing member passing the conveyance nip after the at least part of the image bearing member has once passed the collection nip.