| 摘要 |
PURPOSE:To provide a stepping motor drive system and its device which can drive and.control a stepping motor at a low noise without increasing the load of a firmware for stepping motor control at a microcomputer side regardless of rotational speed. CONSTITUTION:A drive waveform for driving a stepping motor 5 is modulated in a specific waveform, the modulated drive, waveform is divided into a plurality of parts along a time axis, at the same time the current of the stepping motor 5 is set in the divided point, the number of divisions is determined according to the time length of drive. waveform, and at the same time the resolution of current setting for driving the stepping motor 5 is controlled to be changed properly. |
