| 摘要 |
<p>PURPOSE:To obtain an intermittent feed motion in excellent stopping accuracy by detecting the rotating digital value of a capstan motor, providing a feedback loop so as to coincide with a command value and turning the electrification into zero when a detecting signal is kept to be zero as longer than a prescribed time. CONSTITUTION:An intermittent feed motion command (j) is inputted from a motion commander 29 to a computing element 25 to determine a digital command value at first. Then, the timing signal (q) of a rotation detector 23 is also inputted to wait for its change. When it is changed, the new signal (b) of the detector 23 is read out and turned into a rotation detecting digital value. A difference from the digital command value is evaluated and added to a digital value before one timing to obtain a control signal digital value Y, which is then converted by a D/A converter 27 into an analog control signal (c). When the rotation detecting value is zero, and a synchronous count variable exceeds a prescribed value, the electrification of a motor part 21 is turned into zero, so as to complete the intermittent feed motion. A stable and excellent precision intermittently feed reproducing is feasible, thus improving the performance for a particular reproducing.</p> |
