| 摘要 |
<p>A positioning system, suitable for positioning a head adjacently to data tracks on a rotating magnetic data storage disc (34) and employing a polyphase optical position detection transducer (42), overcomes positioning inaccuracies associated with the relative spacing between the polyphase position indicating signals by measuring the span of all the phases in terms of demand to produce head movement applied to a D/A convertor (14), calculating the ideal stopping positions, and applying the inverse error demand through the convertor (14) when positioning the head (32).</p> |
