| 摘要 |
PURPOSE:To realize a quiet sound in the course of standby by setting the speed of revolution of a polygon motor to the speed of revolution by which a noise generated by a rotation of the polygon motor is in the outside of an audio frequency band or in the vicinity of the outside of its band, in the course of standby. CONSTITUTION:A polygon motor turn-on/turn-off signal Trig is sent to a polygon control unit 11 from a process control unit 2, a power source of the unit 11 is turned on, and a polygon motor 10 is rotated. The rotation in the course of standby of the motor 10 is rotated by the speed of revolution of a noise being lower and quieter than the speed of revolution in the course of being ready or the speed of revolution in the course of copying in the outside of an audio frequency band. In this case, a READY signal 'H' is sent to the unit 2 from the unit 11. Thereafter, when a copy button is pushed, an SW signal becomes 'L', the motor 10 is accelerated up to the speed of revolution of the copy, and when it reaches the speed of revolution of the copy, the READY signal 'H' is sent to the unit 2 from the unit 11, and a copy sequence is started. |
