Image forming apparatus capable of forming toner image with desired amount of toner, control method for the image forming apparatus, and storage medium

A control method for an image forming apparatus including a printer engine that causes a heating rotary body to support and convey a sheet with a toner image formed thereon and performs an image formation on the sheet, a first counter used for counting up when one page is printed with one of first chroma and second chroma higher than the first chroma, and a second counter used for counting up when one page is printed with the second chroma, the control method comprising:

• controlling the printer engine to perform, during a printing process, the image formation on sheets in a first mode in which a toner image based on a piece of image data is formed with a first amount of toner, or a second mode in which a toner image based on the piece of image data is formed with a second amount of toner larger than the first amount of toner;
• controlling the first counter to count up during a period corresponding to the printing process;
• controlling the second counter not to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the first mode;
• and
• controlling the second counter to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the second mode.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for an image forming apparatus including a printer engine that causes a heating rotary body to support and convey a sheet with a toner image formed thereon and performs an image formation on the sheet, a first counter used for counting up when one page is printed with one of first chroma and second chroma higher than the first chroma, and a second counter used for counting up when one page is printed with the second chroma, wherein the control method comprises:

• controlling the printer engine to perform, during a printing process, the image formation on sheets in a first mode in which a toner image based on a piece of image data is formed with a first amount of toner, or a second mode in which a toner image based on the piece of image data is formed with a second amount of toner larger than the first amount of toner;
• controlling the first counter to count up during a period corresponding to the printing process;
• controlling the second counter not to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the first mode;
• and
• controlling the second counter to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the second mode.