Image forming system, non-transitory computer readable medium storing program, and image forming method

A non-transitory computer readable medium storing a program causing a computer to execute a process comprising:

• in an image forming apparatus including a first image forming unit including a plurality of first image forming portions and a first intermediate transfer medium to which a toner image formed by the plurality of first image forming portions is primarily transferred, a second image forming unit that is provided on a downstream side of a sheet transport direction with respect to the first image forming unit and that includes a plurality of second image forming portions and a second intermediate transfer medium to which a toner image formed by the plurality of second image forming portions is primarily transferred, and a sheet transport portion that transports a sheet to a secondary transfer position at which each of the toner image formed on the first intermediate transfer medium of the first image forming unit and the toner image formed on the second intermediate transfer medium of the second image forming unit is secondarily transferred,
• causing, in performing registration between a position of an image printed on the sheet by the first image forming unit and a position of an image printed on the sheet by the second image forming unit, each of one first image forming portion selected from the plurality of first image forming portions of the first image forming unit and one second image forming portion selected from the plurality of second image forming portions of the second image forming unit to form the image at the same position on the sheet;
• and
• reducing a misregistration amount by partially changing a drawing cycle of the image in any one of the first image forming unit or the second image forming unit in accordance with a relative misregistration amount between the two formed images.

An image forming method comprising:

• in an image forming apparatus including a first image forming unit including a plurality of first image forming portions and a first intermediate transfer medium to which a toner image formed by the plurality of first image forming portions is primarily transferred, a second image forming unit that is provided on a downstream side of a sheet transport direction with respect to the first image forming unit and that includes a plurality of second image forming portions and a second intermediate transfer medium to which a toner image formed by the plurality of second image forming portions is primarily transferred, and a sheet transport portion that transports a sheet to a secondary transfer position at which each of the toner image formed on the first intermediate transfer medium of the first image forming unit and the toner image formed on the second intermediate transfer medium of the second image forming unit is secondarily transferred,
• causing, in performing registration between a position of an image printed on the sheet by the first image forming unit and a position of an image printed on the sheet by the second image forming unit, each of one first image forming portion selected from the plurality of first image forming portions of the first image forming unit and one second image forming portion selected from the plurality of second image forming portions of the second image forming unit to form the image at the same position on the sheet;
• and
• reducing a misregistration amount by partially changing a drawing cycle of the image in any one of the first image forming unit or the second image forming unit in accordance with a relative misregistration amount between the two formed images.