| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor drive operating at a plurality of speeds and used for a copy machine or an LBP in which optimal conduction control is performed by switching a speed servo gain and an FG amplifier gain depending on the various speeds. <P>SOLUTION: The rotational accuracy of a motor can be improved by switching the gain of an FG amplifier means 104 and the gain of a speed amplifier means 112 with a gain switching signal 116 while interlocking an FG amplifier gain setting means 105 and a speed amplifier gain setting means 113 which are set with conditions most suitable for individual speeds of high or low speed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
