| 摘要 |
PROBLEM TO BE SOLVED: To easily and appropriately change a driving system for a motor according to its operating state, and to achieve the silence, high speed, high accuracy and power consumption of the motor. SOLUTION: A CPU 13 refers to a drive mode table 51 to determine a driving scheme and a stop position corresponding to present operating states of stepping motors 8-1 to 8-3 and a digital camera to be driven. The CPU 13 sets a command to be transmitted next in a transmission buffer according to the driving scheme. When an output pulse of an excitation signal to the motor reaches a predetermined number, the CPU automatically transmits the command to a motor driver 7. For example, when in a demagnetized state, an excitation voltage is increased stepwise. When two stepping motors are simultaneously driven, the phase of a driving current is shifted. When the stepping motor is stopped, driving is controlled so that the motor is stopped in the stop position. COPYRIGHT: (C)2008,JPO&INPIT |
