| 摘要 |
PURPOSE:To eliminate problems with respect to noise and driving speed and to optimally control to drive by driving a pulse motor in a phase exciting system responsive to an object to be driven. CONSTITUTION:A 2-phase pulse motor 26 is employed, and driven by 2-phase excitation, 1-2-phase excitation. That is, 1-2-phase excitation which can half step is selected to drive an optical system (exposure lamp units 4-7). Since this affects an influence to an image in the movement of the optical system, it is provided to smoothly operate it. The 2-phase excitation having large output torque is selected to drive a lens, thereby driving it for a large load. |
