Image forming apparatus

An image forming apparatus comprising:

• a feeding unit configured to convey a recording material and to be detachably mountable on an apparatus main body that forms an image on the recording material;
• a first detection unit configured to detect the recording material, the first detection unit provided downstream of the feeding unit in a conveyance direction of the recording material;
• a measurement unit configured to measure a measured time from start of conveyance of the recording material by the feeding unit to detection of the recording material by the detection unit;
• and
• a first determination unit configured to form a first data set from a plurality of measured times acquired by the measurement unit in a plurality of measurement processes, form a second data set from a plurality of measured times acquired by the measurement unit in a plurality of measurement processes during a period different from a period during which the first data set is formed, and perform renewal determination for determining whether the feeding unit has been replaced with a new feeding unit based on a change from parameters in the first data set to parameters in the second data set,
• wherein in a case in which the change is greater than a renewal threshold value N, the first determination unit determines that the feeding unit has been replaced with a new feeding unit, and in a case in which the change is less than the renewal threshold value N, the first determination unit determines that the feeding unit has not been replaced with a new feeding unit.