公开(公告)号：US5198909A

公开(公告)日：1993-03-30

申请号：US522892

申请日：1990-05-14

申请人： Masuji Ogiwara ,  Kuninobu Nagano ,  Kimihito Ohmori ,  Harutaka Sudo

发明人： Masuji Ogiwara ,  Kuninobu Nagano ,  Kimihito Ohmori ,  Harutaka Sudo

IPC分类号： G03B27/50 ,  H04N1/04 ,  H04N1/10 ,  H04N1/193

CPC分类号： H04N1/04 ,  H04N1/02875 ,  H04N1/1017 ,  H04N1/193 ,  H04N2201/046

摘要： A vibration preventive system in use with an image recording apparatus of the type in which an original is scanned by reciprocatively moving an imaging unit by a stepping motor in two different types of scan modes, a forward scan mode in which an original read region is a constant speed region and a back scan mode to return the imaging unit to an original position at a high speed, the vibration preventive system comprising a drive current control for controlling a drive current fed to the stepping motor in such a way that in the constant speed region, drive current for driving the stepping motor is changed to a value smaller than that in an acceleration region. In the forward scan mode, the drive current is changed before the imaging unit reaches the registration position or after the end of acceleration in the forward scan mode. When the imaging unit is between them, the drive current is changed at a point in the undershoot of a transient vibration after the end of acceleration, or at the tail edge of the forward scan mode.

摘要翻译： 一种与通过步进电机以两种不同类型的扫描模式往复移动成像单元来扫描原件的类型的图像记录装置的防振系统，其中原始读取区域为 恒速区域和反向扫描模式以使成像单元以高速返回原始位置，该防振系统包括用于以恒定速度控制供给步进电机的驱动电流的驱动电流控制 驱动步进电动机的驱动电流变化为比加速区域小的值。 在正向扫描模式中，驱动电流在成像单元到达对位位置之前或在正向扫描模式中的加速结束之后改变。 当成像单元在它们之间时，驱动电流在加速结束之后的瞬时振动的下冲点处或在正向扫描模式的尾部边缘处改变。