| 摘要 |
This system concerns motors that will create index signals without other index signal generating parts for spindles of Floppy Disk Drivers. This system generates index signals using motor driving. The pole length of one of the motor drivers is changed, and the counter senses the amplified voltage signals. This invention is composed of magnetic poles (8), which are distributed in order with the exception of one different length around the rotor (1), a Hall sensor (10) for current, which is generated according to the poles (8) and chooses and generates from one of the current Hall sensor (9).
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