Image forming apparatus

An image forming apparatus comprising:

• an image forming portion configured to form an image on a sheet;
• a reverse roller pair configured to feed the sheet, on which the image is formed by the image forming portion, in a first direction and then to reverse and feed the sheet in a second direction that is opposite to the first direction;
• a reverse motor configured to rotate in a first rotational direction and cause the reverse roller pair to feed the sheet in the first direction, and to rotate in a second rotational direction opposite to the first rotational direction and cause the reverse roller pair to feed the sheet in the second direction;
• and
• a controller configured to control rotation of the reverse motor in a first feeding mode in which a sheet with a first length is fed and in a second feeding mode in which a sheet with a second length shorter than the first length is fed,
• wherein the controller executes the first feeding mode in which the reverse motor rotating in the first rotational direction is accelerated from zero speed to a predetermined speed before a leading end of the sheet reaches the reverse roller pair, and then the reverse motor rotating in the first rotational direction is accelerated from the predetermined speed to a first speed faster than the predetermined speed after the leading end of the sheet reaches the reverse roller pair and a rear end of the sheet passes through the image forming portion, and
• wherein the controller executes the second feeding mode in which the reverse motor rotating in the first rotational direction is accelerated from zero speed to a second speed slower than the first speed before a leading end of the sheet reaches the reverse roller pair.