Image forming apparatus that forms an image on a sheet under an operation condition set depending on a sheet type

An image forming apparatus that forms an image on a sheet under an operation condition set depending on a sheet type, comprising:

• a processor that:
• detects whether the sheet type is any one of a plurality of assumed types on the basis of an output of a sensor provided in a conveyance path of the sheet;
• performs control such that an activation operation for forming the image under an interim condition, which is an operation condition corresponding to one of the plurality of assumed types, is performed before detecting the sheet type;
• determines whether or not a recovery operation for optimizing a state of image formation is performed before starting image formation under a determinate condition, which is an operation condition corresponding to the detected type, on the basis of a magnitude of a difference between the determinate condition and the interim condition when the sheet type is detected;
• performs control such that the recovery operation is performed when it is determined that the recovery operation is performed;
• and
• performs control such that the image formation is performed under the determinate condition after the recovery operation is performed,
• wherein the processor:
• determines whether or not the magnitude of the difference between the determinate condition and the interim condition is zero;
• upon determining that the magnitude of the difference is not zero, determines whether or not the magnitude of the difference is equal to or larger than a threshold value;
• and
• determines that the recovery operation is not performed before starting image formation under the determinate condition on the basis of the determination that the magnitude of the difference is smaller than the threshold value.