| 摘要 |
The system speed of the image forming apparatus is controlled to operate in one of two modes. In one embodiment, a controller coordinates the operation of a plurality of image forming units and the transporter. The controller sets a system speed of the image forming apparatus at a first speed when a first mode is set to form a color image using the plurality of image forming units and sets the system speed of the image forming apparatus at a second speed which is faster than the first speed when a second mode is set to form a single-color image using only an image forming unit provided at a most downstream position in a transportation direction of the transporter. In another embodiment, a controller coordinates the operation of the plurality of image forming units and the transporter, and sets a system speed at a first speed when a first mode is set to form a color image using the plurality of image forming units and sets the system speed at a second speed which is slower than the first speed when a second mode is set to form a single-color image using only one of the plurality of image forming units and a special sheet different from plain paper is used as the recording sheet.
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