Image forming apparatus

An image forming apparatus comprising:

• a forming unit configured to form a measurement image on a sheet;
• a fixing unit configured to heat the measurement image to fix the measurement image;
• a measurement unit which is provided downstream of the fixing unit in a conveyance direction of the sheet, and is configured to measure a color of the fixed measurement image;
• a first connection detector configured to detect whether a first cooling device having a cooling function is connected between the fixing unit and the measurement unit;
• a second connection detector configured to detect whether a second cooling device having a cooling function is connected between the fixing unit and the measurement unit;
• and
• a controller configured to control, in a case in which it is detected that the first cooling device and the second cooling device are connected, respectively, from a detection result of the first connection detector and a detection result of the second connection detector, conveyance of the sheet so that a time from when the sheet passes through the fixing unit to when the measurement unit starts measuring the color of the fixed measurement image becomes a first time, and control, in a case in which it is detected that the first cooling device is connected but the second cooling device is not connected, the conveyance of the sheet so that the time becomes a second time, and control, in a case in which it is detected that the second cooling device is connected but the first cooling device is not connected, the conveyance of the sheet so that the time becomes a third time, and control, in a case in which it is detected that the first cooling device and the second cooling device are not connected, respectively, the conveyance of the sheet so that the time becomes a fourth time,
• wherein the first time is shorter than the second time, the third time, or the fourth time.

An image forming apparatus comprising:

• a forming unit configured to form a measurement image on a sheet;
• a fixing unit configured to heat the measurement image to fix the measurement image;
• a measurement unit which is provided downstream of the fixing unit in a conveyance direction of the sheet, and is configured to measure a color of the fixed measurement image;
• an operation detector configured to detect whether a cooling device having a cooling function is operative, the cooling device being connected between the fixing unit and the measurement unit;
• and
• a controller configured to control, in a case in which the operation detector detects that the cooling device is operative, conveyance of the sheet so that a time from when the sheet passes through the fixing unit to when the measurement unit starts measuring the color of the fixed measurement image becomes a first time, and control, in a case in which the operation detector does not detect that the cooling device is operative, the conveyance of the sheet so that the time becomes a second time longer than the first time.