| 摘要 |
<p>PURPOSE:To securely make an error fall within a target range by enhancing a servo characteristic to meet deterioration with age of a cylinder motor, a capstan motor and individual component parts of their drivers. CONSTITUTION:The device possesses a software servo M3 for correcting a speed error and a phase error of a cylinder motor M1 and a capstan motor M2 so as to fall within a target range. Then, when errors are increased due to deterioration with age of individual component parts constituting the cylinder motor M1 and the capstan motor M2, etc., so as not to fall within a target range, this is decided by a deciding means M5, and a coefft. value of a digital filter M6 constituting the software servo M3 is variably controlled by a control means M7, so as to alter the servo characteristic. By this method, the errors can fall within a target range.</p> |
