An image forming apparatus includes a conveyance sensor disposed near a pair of conveyance rollers so as to accurately detect an amount of movement of the recording paper, a conveyance delay determination unit to determine a conveyance delay of the recording paper, and a conveyance control unit to control drive for rollers. The conveyance delay determination unit obtains conveyance delay information from among information detected with the conveyance sensor, or the like, and accelerates a rotational velocity of the pair of paper feed rollers when the conveyance delay quantity exceeds a threshold.

An image forming apparatus includes a transfer portion; a fixing portion; a detection unit that is capable of detecting a deflection amount of the recording material; and a controller configured to control a conveying speed of the fixing portion. The detection unit has a contact portion and a detection portion, and the contact portion is movable to a first position and a second position. The controller moves the contact portion from the second position by outputting the signal for setting the conveying speed to a second speed larger than the conveying speed when the contact portion is located at the second position, and the controller determines an abnormal state when the contact portion is located at the second position and an output time of the signal is longer than or equal to a predetermined time.

A media detection apparatus for detecting moisture information corresponding to a moisture amount or a moisture percentage of a sheet, the media detection apparatus comprising: a light emitter that emits light; a light receiver that receives the light reflected off the sheet or transmitted through the sheet; and a first hardware processor that determines the moisture information on the basis of temperature information corresponding to a temperature of the media detection apparatus and an output of the light receiver.