| 摘要 |
When the sheets are taken out sheet by sheet and started to be fed, in a first predetermined section, a driving mode is set to a fixed PWM driving mode, and a DC motor is driven in response to a PWM signal of a fixed duty to perform the sheet feed operation (S110, S120). When the tip end of the fed sheet is detected by a registration sensor (S140: YES), the sheet feed operation is once stopped (S150), and the driving mode is changed to a position feedback control mode (S170). Thereafter, the sheet is fed to a registration position by a position feedback control, the sheet reaches the registration position, the sheet feed is completed (S200: YES), and the process enters the next transfer operation. The transfer operation is also performed in the position feedback control mode. When a control method is changed before/after the registration sensor in this manner, the speeding-up and noise reduction of the sheet feed operation are realized.
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